19-1369; Rev 1; 2/07
KIT
ATION
EVALU
E
L
B
A
IL
AVA
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
The MAX4188/MAX4189/MAX4190 are low-power,
current-feedback video amplifiers featuring fast disable/enable times and low switching transients. The
triple MAX4188 and the single MAX4190 are optimized
for applications with closed-loop gains of +2V/V (6dB)
or greater and provide a -3dB bandwidth of 200MHz
and 185MHz, respectively. The triple MAX4189 is optimized for closed-loop applications with gains of +1V/V
(0dB) or greater and provides a 250MHz -3dB bandwidth. These amplifiers feature 0.1dB gain flatness up to
80MHz with differential gain and phase errors of 0.03%
and 0.05°. These features make the MAX4188 family
ideal for video applications.
The MAX4188/MAX4189/MAX4190 operate from a +5V
single supply or from ±2.25V to ±5.5V dual supplies.
These amplifiers consume only 1.5mA per amplifier and
are capable of delivering ±55mA of output current, making
them ideal for portable and battery-powered equipment.
The MAX4188/MAX4189/MAX4190 have a high-speed
disable/enable mode that isolates the inputs, places the
outputs in a high-impedance state, and reduces the
supply current to 450µA per amplifier. Each amplifier
can be disabled independently. High off isolation, low
switching transient, and fast enable/disable times
(120ns/35ns) allow these amplifiers to be used in a
wide range of multiplexer applications. A settling time
of 22ns to 0.1%, a slew rate of up to 350V/µs, and low
distortion make these devices useful in many generalpurpose, high-speed applications.
The MAX4188/MAX4189 are available in a tiny 16-pin
QSOP package, and the MAX4190 is available in a
space-saving 8-pin µMAX® package.
Features
♦ Low Supply Current: 1.5mA per Amplifier
♦ Fast Enable/Disable Times: 120ns/35ns
♦ Very Low Switching Transient: 45mVp-p
♦ High Speed
200MHz -3dB Small-Signal Bandwidth
(MAX4188, AVCL ≥ +2)
250MHz -3dB Small-Signal Bandwidth
(MAX4189, AVCL ≥ +1)
185MHz -3dB Small-Signal Bandwidth
(MAX4190, AVCL ≥ +2)
♦ High Slew Rate
350V/µs (MAX4188, AVCL ≥ +2)
175V/µs (MAX4189, AVCL ≥ +1)
♦ Excellent Video Specifications
85MHz -0.1dB Gain Flatness (MAX4190)
30MHz -0.1dB Gain Flatness (MAX4189)
Differential Gain/Phase Errors
0.03%/0.05° (MAX4188)
♦ Low-Power Disable Mode
Inputs Isolated, Outputs Placed in High-Z
Supply Current Reduced to 450µA per Amplifier
♦ Fast Settling Time of 22ns to 0.1%
♦ Low Distortion
70dB SFDR (fc = 5MHz, VO = 2Vp-p, MAX4188)
♦ Available in Space-Saving Packages
16-Pin QSOP (MAX4188/MAX4189)
8-Pin µMAX (MAX4190)
Ordering Information
Applications
High-Definition Surveillance Video
High-Speed Switching/Multiplexing
Portable/Battery-Powered Video/Multimedia
Systems
High-Speed Analog-to-Digital Buffers
PART
TEMP RANGE
PINPACKAGE
PKG
CODE
MAX4188ESD+
-40°C to +85°C
14 SO
S14-1
MAX4188EEE+
-40°C to +85°C 16 QSOP
E16-1
Ordering Information continued at end of data sheet.
+Denotes lead-free package.
Medical Imaging
Selector Guide
High-Speed Signal Processing
PART
OPTIMIZED
FOR:
AMPLIFIERS
PER PKG.
MAX4188
AV ≥ +2V/V
3
14-pin SO,
16-pin QSOP
Pin Configuration appears at end of data sheet.
MAX4189
AV ≥ +1V/V
3
14-pin SO,
16-pin QSOP
µMAX is a registered trademark of Maxim Integrated Products, Inc.
MAX4190
AV ≥ +2V/V
1
8-pin µMAX/SO
Professional Cameras
CCD Imaging Systems
RGB Distribution Amplifiers
PIN-PACKAGE
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX4188/MAX4189/MAX4190
General Description
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to VEE)................................................+12V
IN_+, IN_-, DISABLE_ Voltage .........(VEE - 0.3V) to (VCC + 0.3V)
Differential Input Voltage (IN_+ to IN_-)..............................±1.5V
Maximum Current into IN_+ or IN_-..................................±10mA
Output Short-Circuit Current Duration........................Continuous
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
8-Pin µMAX (derate 4.1mW/°C above +70°C) ............330mW
14-Pin SO (derate 8.3mW/°C above +70°C) ..................667mW
16-Pin QSOP (derate 8.3mW/°C above +70°C)...............667mW
Operating Temperature Range............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS—Dual Supplies
(VCC = +5V; VEE = -5V; IN+ = 0V; DISABLE_ ≥ 3.2V; MAX4188: AV = +2V/V, RF = RG = 910Ω for RL = 1kΩ and RF = RG = 560Ω for
RL = 150Ω; MAX4189: AV = +1V/V, RF = 1600Ω for RL = 1kΩ and RF = 1100Ω for RL = 150Ω; MAX4190: AV = +2V/V, RF = RG =
1300Ω for RL = 1kΩ, RF = RG = 680Ω for RL = 150Ω; TA = TMIN to TMAX, unless otherwise noted. Typical values are specified at
TA = +25°C.)
PARAMETER
CONDITIONS
SYMBOL
Operating Supply Voltage
MIN
Inferred from PSRR tests
±2.25
Input Voltage Range
VCM
Guaranteed by CMRR test
±3.1
Input Offset Voltage
VOS
VCM = 0V (Note 1)
Input Offset Voltage Tempco
TCVOS
Input Bias Current (Negative Input)
MAX
UNITS
±5.5
V
±6
mV
±3.4
±1
V
±10
Input Offset Voltage Matching
Input Bias Current (Positive Input)
TYP
µV/°C
±1
IB+
IB-3.1V ≤ VCM ≤ 3.1V, ⎥ VIN+ - VIN-⎥ ≤ 1V
±10
±2
±12
µA
RIN+
Input Resistance (Negative Input)
RIN-
300
Ω
Input Capacitance (Positive Input)
CIN
2.5
pF
dB
Open-Loop Transresistance
CMRR
56
68
-3.1V ≤ VOUT ≤ 3.1V, RL = 1kΩ
1
7
0.3
2
RL = 1kΩ
±3.5
±4.0
RL = 150Ω
±3.0
±3.3
RL = 30Ω
±20
±55
mA
ISC
±60
mA
ROUT
0.2
TR
VSW
Output Current
IOUT
Output Resistance
-2.8V ≤ VOUT ≤ 2.8V, RL = 150Ω
Disabled Output Leakage Current
IOUT(OFF) DISABLE_ ≤ VIL, VOUT ≤ ±3.5V (Note 2)
Disabled Output Capacitance
COUT(OFF) DISABLE_ ≤ VIL, VOUT ≤ ±3.5V
DISABLE Low Threshold
VIL
(Note 3)
DISABLE High Threshold
VIH
(Note 3)
IIN
VEE ≤ DISABLE_ ≤ VCC
DISABLE Input Current
kΩ
-3.1V ≤ VCM ≤ 3.1V
Output-Voltage Swing
Output Short-Circuit Current
350
µA
Input Resistance (Positive Input)
Common-Mode Rejection Ratio
100
mV
±1
±0.8
MΩ
V
Ω
±5
5
µA
pF
VCC - 3
VCC - 1.8
V
V
0.1
2
µA
Power-Supply Rejection Ratio (VCC)
PSRR+
VEE = -5V, VCC = 4.5V to 5.5V
60
75
dB
Power-Supply Rejection Ratio (VEE)
PSRR-
VCC = 5V, VEE = -4.5V to -5.5V
60
73
dB
Quiescent Supply Current (per Amplifier)
IS
Disabled Supply Current (per Amplifier)
IS(OFF)
2
RL = open
1.5
1.85
mA
DISABLE_ ≤ VIL, RL = open
0.45
0.65
mA
_______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
(VCC = +5V; VEE = 0V; IN+ = 2.5V; DISABLE_ ≥ 3.2V; RL to VCC / 2; MAX4188: AV = +2V/V, RF = RG = 1.1kΩ for RL = 1kΩ and RF =
RG = 620Ω for RL = 150Ω; MAX4189: AV = +1V/V, RF = 1500Ω for RL = 1kΩ and RF = 1600Ω for RL = 150Ω; MAX4190: AV = +2V/V,
RF = RG = 1300Ω for RL = 1kΩ, RF = RG = 680Ω for RL = 150Ω; TA = TMIN to TMAX, unless otherwise noted. Typical values are specified at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage
Input Voltage Range
Input Offset Voltage
Input Offset Voltage Tempco
Inferred from PSRR tests
VCM
Guaranteed by CMRR test
VOS
VCM = 2.5V (Note 1)
4.5
1.6 to
3.4
5.5
1.3 to
3.7
±1.5
TCVOS
Input Offset Voltage Matching
V
V
±6.0
mV
±10
µV/°C
±1
mV
Input Bias Current
(Positive Input)
IB+
±1
±10
µA
Input Bias Current
(Negative Input)
IB-
±2
±12
µA
Input Resistance
(Positive Input)
RIN+
Input Resistance
(Negative Input)
Input Capacitance
(Positive Input)
Common-Mode Rejection Ratio
Open-Loop Transresistance
Output-Voltage Swing
Output Current
350
kΩ
RIN-
300
Ω
CIN
2.5
pF
dB
CMRR
TR
Output Resistance
100
1.5V ≤ VCM ≤ 3.5V
48
65
1.3V ≤ VOUT ≤ 3.7V, RL = 1kΩ
1.0
6.5
1.45V ≤ VOUT ≤ 3.55V, RL = 150Ω
0.2
1.0
RL = 1kΩ
1.2 to
3.8
0.9 to
4.1
RL = 150Ω
1.4 to
3.6
1.15 to
3.85
RL = 30Ω
±16
VSW
IOUT
Output Short-Circuit Current
1.6V ≤ VCM ≤ 3.4V, ⎥ VIN+ - VIN-⎥ ≤ 1V
MΩ
V
±28
mA
ISC
±50
mA
ROUT
0.2
Ω
Disabled Output Leakage
Current
IOUT(OFF)
Disabled Output Capacitance
COUT(OFF) DISABLE_ ≤ VIL, 1.2V ≤ VOUT ≤ 3.8V
DISABLE_ ≤ VIL, 1.2V ≤ VOUT ≤ 3.8V (Note 2)
DISABLE Low Threshold
VIL
(Note 3)
DISABLE High Threshold
VIH
(Note 3)
DISABLE Input Current
IIN
0V ≤ DISABLE_ ≤ VCC
Power-Supply Rejection
Ratio (VCC)
PSRR+
Quiescent Supply Current
(per Amplifier)
IS
Disabled Supply Current
(per Amplifier)
IS(OFF)
VCC = 4.5V to 5.5V
0.8
±5
5
pF
VCC - 3
VCC - 1.8
V
V
0.1
60
µA
2
75
µA
dB
RL = open
1.5
1.85
mA
DISABLE_ ≤ VIL, RL = open
0.45
0.65
mA
_______________________________________________________________________________________
3
MAX4188/MAX4189/MAX4190
DC ELECTRICAL CHARACTERISTICS—Single Supply
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
AC ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX4188)
(VCC = +5V, VEE = -5V, VIN = 0V, DISABLE_ ≥ 3V, AV = +2V/V, RF = RG = 910Ω for RL = 1kΩ or RF = RG = 560Ω for RL = 150Ω;
TA = +25°C, unless otherwise noted.)
PARAMETER
Small-Signal -3dB Bandwidth
SYMBOL
BW-3dB
Peaking
Bandwidth for 0.1dB Flatness
BW0.1dB
Large-Signal -3dB Bandwidth
BWLS
CONDITIONS
MIN
TYP
RL = 1kΩ
200
RL = 150Ω
160
RL = 1kΩ
0.25
RL = 150Ω
0.1
RL = 1kΩ
60
RL = 150Ω
80
VOUT = 2VP-P
Slew Rate
SR
VOUT = 4V step,
RL = 150Ω
Settling Time to 0.1%
tS
VOUT = 4V step
RL = 1kΩ
100
RL = 150Ω
100
Positive slew
350
Negative slew
280
22
Rise time
10
Fall time
12
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
70
RL = 150Ω
56
Second Harmonic Distortion
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
-70
RL = 150Ω
-66
Third Harmonic Distortion
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
-73
RL = 150Ω
-56
RL = 1kΩ
0.05
RL = 150Ω
0.32
RL = 1kΩ
0.03
RL = 150Ω
0.04
Rise/Fall Time
Spurious-Free Dynamic Range
VOUT = 4V step
SFDR
Differential Phase Error
DP
NTSC
Differential Gain Error
DG
NTSC
Input Noise-Voltage Density
en
f = 10kHz
Input Noise-Current Density
Output Impedance
in
f = 10kHz
ZOUT
f = 10MHz
2
Positive input
4
Negative input
5
MAX
UNITS
MHz
dB
MHz
MHz
V/µs
V/µs
ns
ns
dB
dBc
dBc
degrees
%
nV/√Hz
pA/√Hz
4
Ω
Crosstalk
f = 10MHz, input referred
-55
dB
All Hostile Off-Isolation
f = 10MHz, input referred
-65
dB
100
MHz
Gain Matching to 0.1dB
Amplifier Enable Time
tON
Delay from DISABLE to 90% of VOUT,
VIN = 0.5V
120
ns
Amplifier Disable Time
tOFF
Delay from DISABLE to 10% of VOUT,
VIN = 0.5V
35
ns
Positive transient
30
Negative transient
15
Disable/Enable Switching
Transient
4
_______________________________________________________________________________________
mV
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
(VCC = +5V, VEE = -5V, VIN = 0V, DISABLE_ ≥ 3V, AV = +1V/V, RF = 1600Ω for RL = 1kΩ and RF = 1100Ω for RL = 150Ω; TA =
+25°C, unless otherwise noted.)
PARAMETER
Small-Signal -3dB Bandwidth
SYMBOL
BW-3dB
Peaking
Bandwidth for 0.1dB Flatness
BW0.1dB
Large-Signal -3dB Bandwidth
BWLS
CONDITIONS
MIN
TYP
RL = 1kΩ
250
RL = 150Ω
210
RL = 1kΩ
1.4
RL = 150Ω
0.15
RL = 1kΩ
7
RL = 150Ω
30
VOUT = 2VP-P
Slew Rate
SR
VOUT = 4V step,
RL = 150Ω
Settling Time to 0.1%
tS
VOUT = 4V step
RL = 1kΩ
60
RL = 150Ω
55
Positive slew
175
Negative slew
150
28
Rise time
20
Fall time
22
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
65
RL = 150Ω
51
Second Harmonic Distortion
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
-65
RL = 150Ω
-63
Third Harmonic Distortion
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
-70
RL = 150Ω
-51
RL = 1kΩ
0.02
RL = 150Ω
0.66
RL = 1kΩ
0.07
RL = 150Ω
0.18
Rise/Fall Time
VOUT = 4V step
Spurious-Free Dynamic Range
SFDR
Differential Phase Error
DP
NTSC
Differential Gain Error
DG
NTSC
Input Noise-Voltage Density
en
f = 10kHz
Input Noise-Current Density
Output Impedance
in
f = 10kHz
ZOUT
f = 10MHz
2
Positive input
4
Negative input
5
MAX
UNITS
MHz
dB
MHz
MHz
V/µs
V/µs
ns
ns
dB
dBc
dBc
degrees
%
nV/√Hz
pA/√Hz
4
Ω
Crosstalk
f = 10MHz, input referred
-57
dB
All Hostile Off-Isolation
f = 10MHz, input referred
-55
dB
24
MHz
Gain Matching to 0.1dB
Amplifier Enable Time
tON
Delay from DISABLE to 90% of VOUT,
VIN = 0.5V
120
ns
Amplifier Disable Time
tOFF
Delay from DISABLE to 10% of VOUT,
VIN = 0.5V
40
ns
Disable/Enable Switching
Transient
Positive transient
70
Negative transient
110
mV
_______________________________________________________________________________________
5
MAX4188/MAX4189/MAX4190
AC ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX4189)
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
AC & DYNAMIC PERFORMANCE—Dual Supplies (MAX4190)
(V CC = +5V, V EE = -5V, V IN = 0V, A V = +2V/V; R F = R G = 1300Ω for R L = 1kΩ and R F = R G = 680Ω for R L = 150Ω,
TA = +25°C, unless otherwise noted.)
PARAMETER
Small-Signal -3dB Bandwidth
SYMBOL
BWSS
Peaking
Bandwidth for 0.1dB Flatness
BWLS
Large-Signal -3dB Bandwidth
BWLS
Slew Rate
Settling Time to 0.1%
CONDITIONS
TYP
RL = 1kΩ
185
RL = 150Ω
150
RL = 1kΩ
0.1
RL = 150Ω
0.1
RL = 1kΩ
85
RL = 150kΩ
75
VO = 2VP-P
SR
VO = 4V step,
RL = 150Ω
tS
VO = 2V step
RL = 1kΩ
95
RL = 150Ω
95
Positive slew
340
Negative slew
270
22
VO = 4V step,
RL = 150Ω
Rise time
10
Fall time
12
Spurious-Free Dynamic Range
fC = 5MHz,
VO = 2VP-P
RL = 1kΩ
61
RL = 150Ω
55
Second Harmonic Distortion
fC = 5MHz,
VO = 2VP-P
RL = 1kΩ
-65
RL = 150Ω
-55
Third Harmonic Distortion
fC = 5MHz,
VO = 2VP-P
RL = 1kΩ
-73
RL = 150Ω
-61
RL = 1kΩ
0.03
RL = 150Ω
0.07
RL = 1kΩ
0.06
RL = 150Ω
0.45
Rise/Fall Time
tR
MIN
tF
Differential Gain Error
DG
NTSC
Differential Phase Error
DP
NTSC
Input Noise-Current Density
Input Noise-Voltage Density
Output Impedance
f = 10kHz
en
f = 10kHz
ZOUT
f = 10MHz
All Hostile Off-Isolation
Positive input
4
Negative input
5
f = 10MHz, input referred
2
MAX
UNITS
MHz
dB
MHz
MHz
V/µs
ns
ns
dB
dBc
dBc
degrees
degrees
pA/√Hz
nV/√Hz
4
Ω
-60
dB
Turn-On Time from DISABLE
tON
120
ns
Turn-Off Time from DISABLE
tOFF
35
ns
Disable/Enable Switching
Transient
6
BWLS
Positive transient
30
Negative transient
15
_______________________________________________________________________________________
mV
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
(VCC = +5V, VEE = 0V, VIN = 2.5V, DISABLE_ ≥ 3V, RL to VCC / 2, AV = +2V/V, RF = RG = 1.1kΩ for RL = 1kΩ to VCC / 2 and RF = RG
= 620Ω for RL = 150Ω; TA = +25°C, unless otherwise noted.)
PARAMETER
Small-Signal -3dB Bandwidth
SYMBOL
BW-3dB
Peaking
Bandwidth for 0.1dB Flatness
BW0.1dB
Large-Signal -3dB Bandwidth
BWLS
CONDITIONS
MIN
TYP
RL = 1kΩ
185
RL = 150Ω
145
RL = 1kΩ
0.1
RL = 150Ω
0.1
RL = 1kΩ
110
RL = 150Ω
65
VOUT = 2VP-P
Slew Rate
SR
step
VOUT
OUT = 2V step,
RL = 150Ω
Settling Time to 0.1%
tS
VOUT = 2V step
Positive slew
300
V/µs
Negative slew
230
V/µs
20
ns
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
66
RL = 150Ω
56
Second Harmonic Distortion
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
-76
RL = 150Ω
-59
Third Harmonic Distortion
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
-66
RL = 150Ω
-56
RL = 1kΩ
0.06
RL = 150Ω
0.34
RL = 1kΩ
0.02
RL = 150Ω
0.05
Differential Phase Error
DP
NTSC
Differential Gain Error
DG
NTSC
Input Noise-Voltage Density
en
f = 10kHz
Input Noise-Current Density
Output Impedance
in
f = 10kHz
ZOUT
f = 10MHz
MHz
80
9
SFDR
dB
RL = 150Ω
Fall time
Spurious-Free Dynamic Range
MHz
80
8
VOUT = 2V step
UNITS
RL = 1kΩ
Rise time
Rise/Fall Time
MAX
2
Positive input
4
Negative input
5
MHz
ns
dB
dBc
dBc
degrees
%
nV/√Hz
pA/√Hz
4
Ω
Crosstalk
f = 10MHz, input referred
-55
dB
All Hostile Off Isolation
f = 10MHz, input referred
-65
dB
40
MHz
Gain Matching to 0.1dB
Amplifier Enable Time
tON
Delay from DISABLE to 90% of VOUT,
VIN = 3V
120
ns
Amplifier Disable Time
tOFF
Delay from DISABLE to 10% of VOUT,
VIN = 3V
35
ns
Positive transient
30
Negative transient
15
Disable/Enable Switching
Transient
mV
_______________________________________________________________________________________
7
MAX4188/MAX4189/MAX4190
AC ELECTRICAL CHARACTERISTICS—Single Supply (MAX4188)
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
AC ELECTRICAL CHARACTERISTICS—Single Supply (MAX4189)
(VCC = +5V, VEE = 0V, VIN = 2.5V, DISABLE_ ≥ 3V, RL to VCC / 2, AV = +1V/V, RF = 1500Ω for RL = 1kΩ and RF = 1600Ω for
RL = 150Ω; TA = +25°C, unless otherwise noted.)
PARAMETER
Small-Signal -3dB Bandwidth
SYMBOL
BW-3dB
Peaking
Bandwidth for 0.1dB Flatness
BW0.1dB
Large-Signal -3dB Bandwidth
BWLS
CONDITIONS
MIN
TYP
RL = 1kΩ
230
RL = 150Ω
190
RL = 1kΩ
1.4
RL = 150Ω
0.15
RL = 1kΩ
7
RL = 150Ω
40
VOUT = 2VP-P
Slew Rate
SR
VOUT = 2V step,
RL = 150Ω
Settling Time to 0.1%
tS
VOUT = 2V step
RL = 1kΩ
50
RL = 150Ω
45
Positive slew
160
Negative slew
135
25
Rise time
12
Fall time
15
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
57
RL = 150Ω
47
Second Harmonic Distortion
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
-58
RL = 150Ω
-54
Third Harmonic Distortion
fC = 5MHz,
VOUT = 2VP-P
RL = 1kΩ
-57
RL = 150Ω
-47
RL = 1kΩ
0.04
RL = 150Ω
0.66
RL = 1kΩ
0.06
RL = 150Ω
0.17
Rise/Fall Time
Spurious-Free Dynamic Range
VOUT = 2V step
SFDR
Differential Phase Error
DP
NTSC
Differential Gain Error
DG
NTSC
Input Noise-Voltage Density
en
f = 10kHz
Input Noise-Current Density
Output Impedance
in
f = 10kHz
ZOUT
f = 10MHz
2
Positive input
4
Negative input
5
MAX
UNITS
MHz
dB
MHz
MHz
V/µs
ns
ns
dB
dBc
dBc
degrees
%
nV/√Hz
pA/√Hz
4
Ω
Crosstalk
f = 10MHz, input referred
-57
dB
All Hostile Off-Isolation
f = 10MHz, input referred
-55
dB
25
MHz
Gain Matching to 0.1dB
Amplifier Enable Time
tON
Delay from DISABLE to 90% of VOUT,
VIN = 3V
120
ns
Amplifier Disable Time
tOFF
Delay from DISABLE to 10% of VOUT,
VIN = 3V
40
ns
Disable/Enable Switching
Transient
Positive transient
70
Negative transient
110
Note 1: Input Offset Voltage does not include the effect of IBIAS flowing through RF/RG.
Note 2: Does not include current through external feedback network.
Note 3: Over operating supply-voltage range.
8
_______________________________________________________________________________________
mV
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
(V CC = +5V, V EE = 0V, V IN = 0V, A V = +2V/V; R F = R G = 1500Ω for R L = 1kΩ and R F = R G = 750Ω for R L = 150Ω,
TA = +25°C, unless otherwise noted)
PARAMETER
Small-Signal -3dB Bandwidth
SYMBOL
BW-3dB
Peaking
Bandwidth for 0.1dB Flatness
BW0.1dB
Large-Signal -3dB Bandwidth
BWLS
CONDITIONS
MIN
TYP
RL = 1kΩ
165
RL = 150Ω
135
RL = 1kΩ
0.1
RL = 150Ω
0.1
RL = 1kΩ
70
RL = 150Ω
65
VO = 2VP-P
RL = 1kΩ
75
RL = 150Ω
75
Positive slew
290
Negative slew
220
SR
VO = 2V step,
RL = 150Ω
Settling Time to 0.1%
tS
VO = 2V step
Rise/Fall Time
tR
tF
VO = 2V step,
RL = 150Ω
Rise time
8
Fall time
9
Spurious-Free Dynamic Range
fC = 5MHz,
VO = 2VP-P
RL = 1kΩ
59
RL = 150Ω
55
Second Harmonic Distortion
fC = 5MHz,
VO = 2VP-P
RL = 1kΩ
-59
RL = 150Ω
-55
Third Harmonic Distortion
fC = 5MHz,
VO = 2VP-P
RL = 1kΩ
-68
RL = 150Ω
-60
RL = 1kΩ
0.02
RL = 150Ω
0.08
RL = 1kΩ
0.07
RL = 150Ω
0.43
Slew Rate
Differential Gain Error
DG
NTSC
Differential Phase Error
DP
NTSC
Input Noise-Voltage Density
Input Noise-Current Density
Output Impedance
20
f = 10kHz
in
f = 10kHz
ZOUT
f = 10MHz
All Hostile Off-Isolation
2
Positive input
4
Negative input
5
f = 10MHz, input referred, RL = 150Ω
MAX
UNITS
MHz
dB
MHz
MHz
V/µs
ns
ns
dB
dBc
dBc
%
degrees
nV/√Hz
pA/√Hz
4
Ω
-60
dB
Turn-On Time from DISABLE
tON
120
ns
Turn-Off Time from DISABLE
tOFF
35
ns
Disable/Enable Switching
Transient
BWLS
Positive transient
30
Negative transient
15
mV
_______________________________________________________________________________________
9
MAX4188/MAX4189/MAX4190
AC & DYNAMIC PERFORMANCE—Single Supply (MAX4190)
__________________________________________Typical Operating Characteristics
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
MAX4188 SMALL-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
7
6
5
RF = RG = 390Ω
RL = 100Ω
10
100
-0.6
1
100
1000
10
100
MAX4189 GAIN FLATNESS
vs. FREQUENCY (DUAL SUPPLIES)
2
-4
-0.2
RF = 1.6kΩ
RL = 150Ω
-2
VEE = 0
VIN = 20mVP-P
AV = +1V/V
-5
100
RF = 680Ω
RL = 100Ω
-0.3
-0.4
-0.6
VIN = 20mVP-P
AV = +1V/V
-0.7
-0.8
1
1000
10
100
1000
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX4188 LARGE-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
MAX4188 LARGE-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
MAX4188 SMALL-SIGNAL GAIN
MATCHING vs. FREQUENCY
8
RF = RG = 560Ω
RL = 150Ω
6
8
RF = RG = 620Ω
RL = 150Ω
7
GAIN (dB)
7
9
5
RF = RG = 910Ω
RL = 1kΩ
6
5
RF = RG = 1.1kΩ
RL = 1kΩ
4
3
2
VEE = 0
VIN = 1VP-P
AV = +2V/V
2
VIN = 1VP-P
AV = +2V/V
1
0
100
FREQUENCY (MHz)
1000
1.5
1000
CH1-CH3
1.0
0.5
0
-0.5
CH2-CH3
-1.0
VIN = 20mVP-P
RF = RG = 750Ω
RL = 1kΩ
AV = +2V/V
-1.5
-2.0
0
10
2.0
GAIN MATCHING (dB)
9
2.5
MAX4188toc08
10
MAX4188toc07
10
1000
-0.5
RF = 910Ω
RL = 100Ω
-6
-6
10
0
-4
VIN = 20mVP-P
AV = +1V/V
1
-0.1
-1
RF = 1.1kΩ
RL = 150Ω
0
1
-3
RF = 1.1kΩ
RL = 150Ω
-3
0.2
0.1
GAIN (dB)
GAIN (dB)
-2
RF = 1.5kΩ
RL = 1kΩ
3
MAX4188toc05
4
MAX4188toc04
RF = 1.6kΩ
RL = 1kΩ
0
1
1
MAX4189 SMALL-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
-1
1
10
MAX4189 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
1
3
VIN = 20mVP-P
AV = +2V/V
-0.5
FREQUENCY (MHz)
RF = 680Ω
RL = 100Ω
4
RF = RG = 390Ω
RL = 100Ω
FREQUENCY (MHz)
4
-5
-0.2
FREQUENCY (MHz)
3
2
1000
RF = RG = 620Ω
RL = 150Ω
-0.4
0
1
GAIN (dB)
VEE = 0V
VIN = 20mVP-P
AV = +2V/V
1
0
0
-0.1
-0.3
2
VIN = 20mVP-P
AV = +2V/V
1
0.1
RF = RG = 620Ω
RL = 150Ω
4
0.2
RF = RG = 1.1kΩ
RL = 1kΩ
3
2
10
5
RF = RG = 910Ω
RL = 1kΩ
MAX4188toc06
3
6
0.4
0.3
MAX4188toc09
4
RF = RG = 430Ω
RL = 100Ω
8
GAIN (dB)
GAIN (dB)
7
9
GAIN (dB)
RF = RG = 910kΩ
RF = RG = 560Ω R = 1kΩ
L
RL = 150Ω
8
10
MAX4188toc02
9
MAX4188toc01
10
MAX4188 GAIN FLATNESS
vs. FREQUENCY (DUAL SUPPLIES)
MAX4188toc03
MAX4188 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
GAIN (dB)
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
CH1-CH2
-2.5
1
10
100
FREQUENCY (MHz)
1000
1
10
100
FREQUENCY (MHz)
______________________________________________________________________________________
1000
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
MAX4189 LARGE-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
3
GAIN (dB)
0
RF = 1.1kΩ
RL = 150Ω
0.5
-4
VIN = 2VP-P
AV = 1V/V
-5
10
100
100
1000
1
MAX4188 CROSSTALK vs.
FREQUENCY (DUAL SUPPLIES)
-10
VOUT = 2VP-P
-20
-70
-40
3RD (RL = 150Ω)
-50
2ND (RL = 150Ω)
-70
-80
3RD (RL = 1kΩ)
-90
3RD (RL = 1kΩ)
-100
0.1
1
10
100
-40
-50
-70
-90
-100
-30
-60
2ND (RL = 1kΩ)
-80
2ND (RL = 1kΩ)
0.1
1
-80
10
1
100
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX4189 HARMONIC DISTORTION
vs. FREQUENCY (DUAL SUPPLIES)
MAX4189 HARMONIC DISTORTION
vs. FREQUENCY (SINGLE SUPPLY)
MAX4189 CROSSTALK vs.
FREQUENCY (DUAL SUPPLIES)
-20
3RD (RL = 150Ω)
2ND (RL = 150Ω)
-70
VOUT = 2VP-P
-20
DISTORTION (dBc)
-30
-10
3RD (RL = 150Ω)
-40
2ND (RL = 150Ω)
-60
2ND (RL = 1kΩ)
-70
-80
-100
3RD (RL = 1kΩ)
FREQUENCY (MHz)
-50
-70
-80
-100
10
-40
-60
-90
3RD (RL = 1kΩ)
1
-30
-80
2ND (RL = 1kΩ)
-90
VOUT = 2VP-P
RL = 150Ω
-10
1000
-20
-30
-50
0
CROSSTALK (dBc)
VOUT = 2VP-P
MAX4188toc17
0
MAX4188toc16
0
1000
-20
-30
-60
VOUT = 2VP-P
RL = 150Ω
-10
CROSSTALK (dBc)
DISTORTION (dBc)
2ND (RL = 150Ω)
0
MAX4188toc14
0
MAX4188toc13
3RD (RL = 150Ω)
0.1
100
MAX4188 HARMONIC DISTORTION
vs. FREQUENCY (SINGLE SUPPLY)
VOUT = 2VP-P
-40
10
MAX4188 HARMONIC DISTORTION
vs. FREQUENCY (DUAL SUPPLIES)
-50
-60
10
FREQUENCY (MHz)
-40
-50
-2.0
CH_3–CH_2
FREQUENCY (MHz)
-30
-10
VIN = 2VP-P
RF = 1.6kΩ
RL = 1kΩ
AV = +1V/V
-1.5
FREQUENCY (MHz)
-20
-60
0
-0.5
-2.5
1
1000
CH_1–CH_3
CH_1–CH_2
-1.0
VEE = 0
VIN = 2VP-P
AV = +1V/V
-6
0
-10
RF = 1.6kΩ
RL = 150Ω
-2
-3
1
DISTORTION (dBc)
0
-1
-4
-6
DISTORTION (dBc)
1.0
-3
-5
1.5
1
MAX4188toc15
-2
2.0
MAX4188toc18
-1
RF = 1.5kΩ
RL = 1kΩ
2
RF = 1.6kΩ
RL = 1kΩ
1
MAX4188toc11
2
2.5
GAIN (dB)
3
GAIN (dB)
4
MAX4188toc10
4
MAX4189 SMALL-SIGNAL GAIN
MATCHING vs. FREQUENCY
MAX4188toc12
MAX4189 LARGE-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
100
0.1
1
10
FREQUENCY (MHz)
100
1
10
100
1000
FREQUENCY (MHz)
______________________________________________________________________________________
11
MAX4188/MAX4189/MAX4190
____________________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
____________________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
2.6
2.4
2.2
2.0
1.8
1.6
MAX4188
20
16
910kΩ
910kΩ
12
1k
10k
100k
1M
10M 100M
1G
MAX4188toc21
200
150
DUAL SUPPLIES:
RL = 1kΩ,
AV = +2V/V, RF = RG = 910Ω
FOR MAX4188;
AV = +1V/V, RF = 1.6kΩ
FOR MAX4189
100
0
100
1k
10k
100k
1M
10M 100M
0.02
1G
0.1
1
2
FREQUENCY (Hz)
FREQUENCY (Hz)
INPUT AMPLITUDE (Vp-p)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
OUTPUT IMPEDANCE
vs. FREQUENCY (DUAL SUPPLIES)
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
-30
VCC (MAX4189)
-50
VEE (MAX4189)
-60
-70
VEE (MAX4188)
100
10
MAX4189
MAX4188
1
-80
-90
1.6
0.1
-100
0.1
1
10
100
MAX4188toc24
RL = 1kΩ,
AV = +2V/V, RF = RG = 910Ω
FOR MAX4188;
AV = +1 V/V, RF = 1.6kΩ
FOR MAX4189
SUPPLY CURRENT PER AMPLIFIER (mA)
OUTPUT IMPEDANCE (Ω)
VCC (MAX4188)
-20
1k
MAX4188toc22
0
-10
VCC = 5V; VEE = -5V
1.5
VCC = 5V; VEE = 0
1.4
1.3
1.2
1000
0.1
1
10
100
1000
-40
-20
0
20
40
60
80
FREQUENCY (MHz)
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE (VOS)
vs. TEMPERATURE
INPUT BIAS CURRENT
vs. TEMPERATURE
DISABLED SUPPLY CURRENT PER
AMPLIFIER vs. TEMPERATURE
INPUT BIAS CURRENT (µA)
1.4
1.2
1.0
0.8
0.6
4
3
IB - (POSITIVE INPUT)
2
1
0.4
IB - (NEGATIVE INPUT)
0.2
0
0
-20
0
20
40
TEMPERATURE (°C)
60
80
-40
-20
0
20
40
TEMPERATURE (°C)
60
80
0.5
MAX4188toc27
1.6
MAX4188toc26
5
MAX4188toc25
1.8
DISABLED SUPPLY CURRENT PER AMPLIFIER (mA)
FREQUENCY (MHz)
2.0
-40
MAX4188
250
50
4
100
12
MAX4189
300
8
1.4
PSRR (dB)
VOUT
24
350
-3dB BANDWIDTH (MHz)
2.8
VIN
MAX4188toc20
3.0
28
MAX4188-23
VOLTAGE-NOISE DENSITY (nV/√Hz)
3.2
TOTAL VOLTAGE-NOISE DENSITY (nV/√Hz)
MAX4180 TOC19
3.4
-40
-3dB BANDWIDTH
vs. INPUT AMPLITUDE
TOTAL VOLTAGE-NOISE DENSITY
vs. FREQUENCY (INPUT REFERRED)
INPUT VOLTAGE-NOISE
DENSITY vs. FREQUENCY
VOS (mV)
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
VCC = ±5V
0.4
VCC = ±2.5V
0.3
0.2
-40
-20
0
20
40
TEMPERATURE (°C)
______________________________________________________________________________________
60
80
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
MAX4188
ENABLE/DISABLE RESPONSE
(VCC-VOH) AND (VOL-VEE) (mV)
VOL - VEE; RL = 150Ω
1.6
1.4
4V
MAX4188toc30
MAX4188toc28
1.8
MAX4189
POWER-ON RESPONSE
MAX4188toc29
OUTPUT VOLTAGE SWING
vs. TEMPERATURE
10V
DISABLE
VCC
0V
0V
2V
VOUT
OUT
2V/div
0V
0V
VCC - VOH; RL = 150Ω
1.2
VOL - VEE; RL = 1kΩ
1.0
VCC - VOH; RL = 1kΩ
50ns/div
AV = +2V/V, RF = RG = 910Ω, RL = 1kΩ, VIN = 1V
MAX4188
SMALL-SIGNAL PULSE RESPONSE
MAX4188
SMALL-SIGNAL PULSE RESPONSE
(WITH CLOAD)
0
20
40
60
80
+25mV
IN
200ns/div
AV = +1V/V, RL = 1kΩ, RF = 1.6kΩ, VEE = 0
MAX4188
LARGE-SIGNAL PULSE RESPONSE
MAX4188toc32
TEMPERATURE (°C)
-20
MAX4188toc31
-40
+25mV
+1V
IN
IN
-25mV
-1V
-25mV
+50mV
+50mV
+2V
OUT
OUT
OUT
-50mV
-50mV
-2V
10ns/div
AV = +2V/V, RF = RG = 910Ω, RL = 1kΩ
MAX4188toc33
0.8
10ns/div
AV = +2V/V, RF = RG = 910Ω, RL = 1kΩ, CL = 47pF
10ns/div
AV = +2V/V, RF = RG = 910Ω, RL = 1kΩ
______________________________________________________________________________________
13
MAX4188/MAX4189/MAX4190
____________________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
____________________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
MAX4189
SMALL-SIGNAL PULSE RESPONSE
(WITH CLOAD)
+2V
IN
IN
IN
-50mV
-50mV
-2V
+50mV
+50mV
+2V
OUT
OUT
OUT
-50mV
-50mV
-2V
10ns/div
AV = +1V/V, RF = 1.1kΩ, RL = 150Ω
MAX4189
SWITCHING TRANSIENT
OFF-CHANNEL FEEDTHROUGH
vs. FREQUENCY (DUAL SUPPLIES)
DISABLE
0V
0V
OUT
OUT
100mV/div
20mV/div
-25
RL = 150Ω
OFF-CHANNEL FEEDTHROUGH (dB)
MAX4188toc38
3V
DISABLE
0V
10ns/div
AV = +1V/V, RF = 1.1kΩ, RL = 150Ω
10ns/div
AV = +1V/V, RF = 1.6kΩ, RL = 1kΩ, CL = 47pF
MAX4188
SWITCHING TRANSIENT
3V
MAX4188toc36
+50mV
MAX4188toc39
+50mV
MAX4189
LARGE-SIGNAL PULSE RESPONSE
MAX4188toc35
MAX4188toc34
MAX4189
SMALL-SIGNAL PULSE RESPONSE
MAX4188toc37
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
-35
-45
-55
-65
-75
-85
-95
100ns/div
AV = +2V/V, RF = 910Ω, RL = 1kΩ, VIN = 0
14
100ns/div
AV = +1V/V, RF = 1.6kΩ, RL = 1kΩ, VIN = 0
1
10
100
FREQUENCY (MHz)
______________________________________________________________________________________
1000
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
PIN
MAX4188/MAX4189
MAX4190
NAME
FUNCTION
SO
QSOP
SO/µMAX
1
1
—
DISABLE1
Disable Control Input for Amplifier 1. Amplifier 1 is enabled when
DISABLE1 ≥ (VCC - 2V) and disabled when DISABLE1 ≤ (VCC - 3V).
2
2
—
DISABLE2
Disable Control Input for Amplifier 2. Amplifier 2 is enabled when
DISABLE2 ≥ (VCC - 2V) and disabled when DISABLE2 ≤ (VCC - 3V).
3
3
—
DISABLE3
Disable Control Input for Amplifier 3. Amplifier 3 is enabled when
DISABLE3 ≥ (VCC - 2V) and disabled when DISABLE3 ≤ (VCC - 3V).
4
4
7
VCC
Positive Power Supply. Connect VCC to +5V.
5
5
—
IN1+
Amplifier 1 Noninverting Input
6
6
—
IN1-
Amplifier 1 Inverting Input
7
7
—
OUT1
—
8, 9
1, 5
N.C.
8
10
—
OUT3
9
11
—
IN3-
Amplifier 3 Inverting Input
10
12
—
IN3+
Amplifier 3 Noninverting Input
11
13
4
VEE
Negative Power Supply. Connect VEE to -5V or to ground for single-supply
operation.
12
14
—
IN2+
Amplifier 2 Noninverting Input
13
15
—
IN2-
Amplifier 2 Inverting Input
14
16
—
OUT2
—
—
2
IN-
Amplifier Inverting Input
—
—
3
IN+
Amplifier Noninverting Input
—
—
6
OUT
Amplifier Output
—
—
8
DISABLE
Amplifier 1 Output
No Connection. Not internally connected.
Amplifier 3 Output
Amplifier 2 Output
Disable Control Input. Amplifier is enabled when DISABLE ≥ (VCC - 2V)
and disabled when DISABLE ≤ (VCC - 3V).
Detailed Description
The MAX4188/MAX4189/MAX4190 are very low-power,
current-feedback amplifiers featuring bandwidths up to
250MHz, 0.1dB gain flatness to 80MHz, and low differential gain (0.03%) and phase (0.05°) errors. These
amplifiers achieve very high bandwidth-to-power ratios
while maintaining low distortion, wide signal swing, and
excellent load-driving capabilities. They are optimized
for ±5V supplies but are also fully specified for single
+5V operation. Consuming only 1.5mA per amplifier,
these devices have ±55mA output current drive capability and achieve low distortion even while driving 150Ω
loads.
Wide bandwidth, low power, low differential phase/gain
error, and excellent gain flatness make the MAX4188
family ideal for use in portable video equipment such
as video cameras, video switchers, and other batterypowered equipment. Their two-stage design provides
higher gain and lower distortion than conventional single-stage, current-feedback amplifiers. This feature,
combined with a fast settling time, makes these devices
suitable for buffering high-speed analog-to-digital converters.
The MAX4188/MAX4189/MAX4190 have a high-speed,
low-power disable mode that is activated by driving the
amplifiers’ DISABLE input low. In the disable mode, the
______________________________________________________________________________________
15
MAX4188/MAX4189/MAX4190
Pin Descriptions
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
amplifiers achieve very high isolation from input to output
(65dB at 10MHz), and the outputs are placed into a highimpedance state. These amplifiers achieve low switching-transient glitches (<45mV P-P ) when switching
between enable and disable modes. Fast enable/disable
times (120ns/35ns), along with high off-isolation and low
switching transients, allow these devices to be used as
high-performance, high-speed multiplexers. This is
achieved by connecting the outputs of multiple amplifiers
together and controlling the DISABLE inputs to enable
one amplifier and disable all others. The disabled amplifiers present a very light load (1µA leakage current and
3.5pF capacitance) to the active amplifier’s output. The
feedback network impedance of all the disabled amplifiers must still be considered when calculating the total
load on the active amplifier output. Figure 1 shows an
application circuit using the MAX4188 as a 3:1 video multiplexer.
The DISABLE_ logic threshold is typically VCC - 2.5V,
independent of VEE. For a single +5V supply or dual
±5V supplies, the disable inputs are CMOS-logic compatible. The amplifiers default to the enabled mode if
the DISABLE pin is left unconnected. If the DISABLE
pin is left floating, take proper care to ensure that no
high-frequency signals are coupled to this pin, as this
may cause false triggering.
+5V
1.0µF
0.1µF
0.1µF
4
560Ω
11
560Ω
6
7
AMP1
87Ω
75Ω
MAX4188
560Ω
560Ω
13
VIN2
VOUT
87Ω
75Ω
75Ω
560Ω
560Ω
9
8
AMP3
10
VIN3
87Ω
75Ω
1
2
3
DISABLE1
DISABLE2
DISABLE3
Figure 1. High-Speed 3:1 Video Multiplexer
RG
VOUT / VIN = G x [(TZ (S) / TZ(s) + G x (RIN + RF)]
where G = AVCL = 1 + (RF / RG), and RIN = 1/gM ≅
300Ω.
At low gains, G x RIN < RF. Therefore, the closed-loop
bandwidth is essentially independent of closed-loop
gain. Similarly TZ > RF at low frequencies, so that:
RF
RIN
+1
+1
VOUT
TZ
VIN
Figure 2. Current-Feedback Amplifier
16
75Ω
CABLE
14
AMP2
12
Theory of Operation
VOUT
= G = 1 + (RF / RG )
VIN
1.0µF
5
VIN1
Applications Information
The MAX4188/MAX4189/MAX4190 are current-feedback
amplifiers, and their open-loop transfer function is
expressed as a transimpedance, ∆VOUT/∆IIN, or TZ. The
frequency behavior of the open-loop transimpedance is
similar to the open-loop gain of a voltage-mode feedback
amplifier. That is, it has a large DC value and decreases
at approximately 6dB per octave.
Analyzing the follower with gain, as shown in Figure 2,
yields the following transfer function:
-5V
______________________________________________________________________________________
MAX4188
MAX4189
MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
The MAX4188/MAX4189/MAX4190 achieve a high
degree of off-isolation (65dB at 10MHz) and low
crosstalk (-55dB at 10MHz). The input and output signal traces must be kept from overlapping to achieve
high off-isolation. Coupling between the signal traces of
different channels will degrade crosstalk. The signal
traces of each channel should be kept from overlapping with the signal traces of the other channels.
Adequate bypass capacitance at each supply is very
important to optimize the high-frequency performance of
these amplifiers. Inadequate bypassing will also
degrade crosstalk rejection, especially with heavier
loads. Use a 1µF capacitor in parallel with a 0.01µF to
0.1µF capacitor between each supply pin and ground to
achieve optimum performance. The bypass capacitors
should be located as close to the device as possible. A
10µF low-ESR tantalum capacitor may be required to
produce the best settling time and lowest distortion
when large transient currents must be delivered to a
load.
Choosing Feedback and Gain Resistors
The optimum value of the external-feedback (RF) and
gain-setting (RG) resistors used with the MAX4188/
MAX4189/MAX4190 depends on the closed-loop gain
and the application circuit’s load. Table 1 lists the optimum resistor values for some specific gain configurations. One-percent resistor values are preferred to
maintain consistency over a wide range of production
lots. Figures 3a and 3b show the standard inverting
and noninverting configurations. Note that the noninverting circuit gain (Figure 3b) is 1 plus the magnitude
of the inverting closed-loop gain. Otherwise, the two
circuits are identical.
VIN
RS
RT
RG
RF
RG
RF
VOUT
VOUT
RO
RO
RS
VIN
RT
MAX4188
MAX4189
MAX4190
MAX4188
MAX4189
MAX4190
VOUT = [1+ (RF / RG)] VIN
VOUT = -(RF / RG) (VIN)
Figure 3a. Inverting Gain Configuration
Figure 3b. Noninverting Gain Configuration
______________________________________________________________________________________
17
MAX4188/MAX4189/MAX4190
Layout and Power-Supply Bypassing
As with all wideband amplifiers, a carefully laid out PCB
and adequate power-supply bypassing are essential to
realizing the optimum AC performance of MAX4188/
MAX4189/MAX4190. The PC board should have at
least two layers. Signal and power should be on one
layer. A large low-impedance ground plane, as free of
voids as possible, should be the other layer. With multilayer boards, locate the ground plane on a layer that
incorporates no signal or power traces.
Do not use wire-wrap boards or breadboards and
sockets. Wire-wrap boards are too inductive.
Breadboards and sockets are too capacitive. Surfacemount components have lower parasitic inductance
and capacitance, and are therefore preferable to
through-hole components. Keep lines as short as possible to minimize parasitic inductance, and avoid 90°
turns. Round all corners. Terminate all unused amplifier
inputs to ground with a 100Ω or 150Ω resistor.
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
Table 1a. MAX4188 Recommended Component Values
SINGLE SUPPLY
DUAL SUPPLIES
AV = +5
(V/V)
AV = +10
(V/V)
RL =
100Ω
RL =
1kΩ
RL =
1kΩ
RL =
1kΩ
RL =
150Ω
560
390
470
470
1.1k
910
560
390
120
51
200
160
145
70
30
AV = +2V/V
COMPONENT/
BW
COMPONENT/
BW
RL =
1kΩ
RL =
150Ω
RF (Ω)
910
RG (Ω)
-3dB BW (MHz)
AV = +5
V/V
AV = +10
V/V
RL =
100Ω
RL =
1kΩ
RL =
1kΩ
620
430
470
470
1.1k
620
430
120
51
185
145
130
70
30
AV = +2V/V
Table 1b. MAX4189 Recommended Component Values
COMPONENT/
BW
DUAL SUPPLIES
SINGLE SUPPLY
AV = +1V/V
AV = +1V/V
RL = 1kΩ
RL = 150Ω
RL = 100Ω
RL = 1kΩ
RL = 150Ω
RL = 100Ω
RG (Ω)
1.6k
1.1k
680
1.5k
1.6k
910
-3dB BW (MHz)
250
210
185
230
190
165
Table 1c. MAX4190 Recommended Component Values
SINGLE SUPPLY
DUAL SUPPLIES
AV = +5
(V/V)
AV = +10
(V/V)
RL =
100Ω
RL =
1kΩ
RL =
1kΩ
RL =
1kΩ
RL =
150Ω
AV = +2V/V
COMPONENT/
BW
COMPONENT/
BW
RL =
1kΩ
RL =
150Ω
AV = +5
V/V
AV = +10
V/V
RL =
100Ω
RL =
1kΩ
RL =
1kΩ
AV = +1V/V
RF (Ω)
1.3k
680
510
470
470
1.5k
750
510
470
470
RG (Ω)
1.3k
680
510
120
51
1.5k
750
510
120
51
-3dB BW (MHz)
185
180
135
70
30
165
135
125
70
30
DC and Noise Errors
Several major error sources must be considered in any
op amp. These apply equally to the MAX4188/
MAX4189/MAX4190. Offset-error terms are given by the
equation below. Voltage and current-noise errors are
root-square summed and are therefore computed separately. In Figure 4, the total output offset voltage is
determined by the following factors:
• The input offset voltage (VOS) times the closed-loop
gain (1 = RF / RG).
• The positive input bias current (I B+ ) times the
source resistor (RS) (usually 50Ω or 75Ω), plus the
negative input bias current (IB-) times the parallel
combination of R G and R F . In current-feedback
amplifiers, the input bias currents at the IN+ and INterminals do not track each other and may have
opposite polarity, so there is no benefit to matching
the resistance at both inputs.
18
The equation for the total DC error at the output is:
VOUT =
[(I
( )(
)
B + RS + IB − RF
||
⎛
R ⎞
RG + VOS ⎜1 + F ⎟
⎝ RG ⎠
]
)
RF
RG
IB-
VOUT
IB+
RS
MAX4188
MAX4189
MAX4190
Figure 4. Output Offset Voltage
______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
⎛
R ⎞
en(OUT) = ⎜1 + F ⎟ x
⎝ RG ⎠
2
[(in + )RS ] + [(in − )RF ||
Video Line Driver
RG
2
] + (en )
2
The MAX4188/MAX4189/MAX4190 have a very low,
2nV/√Hz noise voltage. The current noise at the positive
input (in+) is 4pA/√Hz, and the current noise at the
inverting input is 5pA/√Hz.
An example of the DC error calculations, using the
MAX4188 typical data and typical operating circuit
where R F = R G = 560kΩ (R F || R G =280Ω), and
RS = 37.5Ω, gives the following:
⎡⎛ x
⎤
1 10 −6 ⎞⎠ x 37.5 + ⎛⎝ 2 x 10 −6 ⎞⎠ 280⎥
VOUT = ⎢⎢⎝
⎥ x 1+ 1
−3
⎢⎣ + 1.5 x 10
⎥⎦
VOUT = 4.1mV
( )
Calculating the total output noise in a similar manner
yields:
2
( )
en(OUT) = 1 + 1
⎛ 4 x 10 −12 x 37.5⎞ +
⎝
⎠
2
⎛ 5 x 10 −12 x 280⎞ + ⎛ 2 x 10 −9 ⎞
⎝
⎠
⎝
⎠
The MAX4188/MAX4189/MAX4190 are well suited to
drive coaxial transmission lines when the cable is terminated at both ends (Figure 5). Cable frequency
response can cause variations in the signal’s flatness.
See Table 1 for optimum RF and RG values.
Driving Capacitive Loads
The MAX4188/MAX4189/MAX4190 are optimized for
AC performance. Reactive loads decrease phase margin and may produce excessive ringing and oscillation.
Unlike most high-speed amplifiers, the MAX4188/
MAX4189/MAX4190 are tolerant of capacitive loads up
to 50pF. Capacitive loads greater than 50pF may
cause ringing and oscillation. Figure 6a shows a circuit
that eliminates this problem. Placing the small (usually
15Ω to 33Ω) isolation resistor, RS, before the reactive
load prevents ringing and oscillation. At higher capacitive loads, the interaction of the load capacitance and
isolation resistor controls AC performance. Figures 6b
and 6c show the MAX4188 and MAX4189 frequency
response with a 100pF capacitive load. Note that in
each case, gain peaking is substantially reduced when
the 20Ω resistor is used to isolate the capacitive load
from the amplifier output.
2
en(OUT) = 4.8nV / Hz
RG
560Ω
RF
560Ω
+5V
MAX4188
MAX4189
MAX4190
0.1µF
RG
75Ω
75Ω CABLE
RS
MAX4188
75Ω CABLE
75Ω
VIDEO
IN
75Ω
RF
VIDEO
OUT
VIN
CL
RL
0.1µF
-5V
Figure 5. Video Line Driver Application
Figure 6a. Using an Isolation Resistor (RS) for High Capacitive
Loads
______________________________________________________________________________________
19
MAX4188/MAX4189/MAX4190
With a 200MHz system bandwidth, this calculates to
68µVRMS (approximately 408µVP-P, choosing the sixsigma value).
The total output-referred noise voltage is:
12
5
MAX4188/MAX4190
AV = +2V/V
RF = RG = 910Ω
RL = 1k || 100pF
VIN = 20mVP-P
10
8
6
MAX4189
AV = +1V/V
RF = 1.6k
RL = 1k || 100pF
VIN = 20mVP-P
4
3
RS = 0Ω
2
4
2
GAIN (dB)
GAIN (dB)
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
RS = 20Ω
0
-2
1
RS = 20Ω
0
RS = 33Ω
-1
-2
RS = 33Ω
-4
RS = 0Ω
-3
-8
-4
-10
-5
1
10
100
1000
1
FREQUENCY (MHz)
10
100
1000
FREQUENCY (MHz)
Figure 6c. Normalized Frequency Response with 100pF
Capacitive Load
Figure 6b. Normalized Frequency Response with 100pF
Capacitive Load
Ordering Information (continued)
Chip Information
MAX4188/4189
TRANSISTOR COUNT: 336
PART
TEMP RANGE
PINPACKAGE
PKG
CODE
MAX4190
TRANSISTOR COUNT: 112
MAX4189ESD+
-40°C to +85°C
14 SO
S14-1
MAX4189EEE+
-40°C to +85°C
16 QSOP
E16-1
SUBSTRATE CONNECTED TO VEE
MAX4190ESA+
-40°C to +85°C
8 SO
S8-2
MAX4190EUA+T
-40°C to +85°C
8 µMAX-8
U8-1
+Denotes lead-free package.
Pin Configurations
TOP VIEW
DISABLE1 1
N.C.
1
IN-
2
IN+
3
VEE
4
8
MAX4190
SO/µMAX
DISABLE
16 OUT2
DISABLE2 2
15 IN2-
DISABLE3 3
14 IN2+
DISABLE2
2
13 IN2-
DISABLE3
3
12 IN2+
VCC 4
11 VEE
IN1+ 5
7
VCC
6
OUT
VCC 4
5
N.C.
IN1+ 5
MAX4188
MAX4189
10 IN3+
MAX4188
MAX4189
13 VEE
12 IN3+
IN1- 6
11 IN3-
IN1- 6
9
IN3-
OUT1 7
10 OUT3
OUT1 7
8
OUT3
N.C. 8
SO
20
DISABLE1 1
14 OUT2
9
QSOP
______________________________________________________________________________________
N.C.
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
N
E
H
INCHES
MILLIMETERS
MAX
MIN
0.069
0.053
0.010
0.004
0.014
0.019
0.007
0.010
0.050 BSC
0.150
0.157
0.228
0.244
0.016
0.050
MAX
MIN
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
1.27 BSC
3.80
4.00
5.80
6.20
0.40
SOICN .EPS
DIM
A
A1
B
C
e
E
H
L
1.27
VARIATIONS:
1
INCHES
TOP VIEW
DIM
D
D
D
MIN
0.189
0.337
0.386
MAX
0.197
0.344
0.394
MILLIMETERS
MIN
4.80
8.55
9.80
MAX
5.00
8.75
10.00
N MS012
8
AA
14
AB
16
AC
D
A
B
e
C
0∞-8∞
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
21-0041
REV.
B
1
1
______________________________________________________________________________________
21
MAX4188/MAX4189/MAX4190
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
QSOP.EPS
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
PACKAGE OUTLINE, QSOP .150", .025" LEAD PITCH
21-0055
22
______________________________________________________________________________________
F
1
1
Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable
E
Ø0.50±0.1
8
INCHES
DIM
A
A1
A2
b
H
c
D
e
E
H
0.6±0.1
1
L
1
α
0.6±0.1
S
BOTTOM VIEW
D
MIN
0.002
0.030
MAX
0.043
0.006
0.037
0.014
0.010
0.007
0.005
0.120
0.116
0.0256 BSC
0.120
0.116
0.198
0.188
0.026
0.016
6°
0°
0.0207 BSC
8LUMAXD.EPS
4X S
8
MILLIMETERS
MAX
MIN
0.05
0.75
1.10
0.15
0.95
0.25
0.36
0.13
0.18
2.95
3.05
0.65 BSC
2.95
3.05
4.78
5.03
0.41
0.66
0°
6°
0.5250 BSC
TOP VIEW
A1
A2
e
A
c
b
α
L
SIDE VIEW
FRONT VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 8L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
21-0036
REV.
J
1
1
Revision History
Pages changed at Rev 1: 1–12, 15–17, 19–23
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
MAX4188/MAX4189/MAX4190
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)