19-1747; Rev 0; 7/00
3Ω Single SPST Analog Switches
____________________________Features
The MAX4675/MAX4676 single analog switches feature
3Ω (max) on-resistance (RON) and 0.7Ω flatness when
operating from dual ±5V supplies. These switches can
handle Rail-to-Rail® analog signals. Off-leakage current
is 0.1nA at TA = +25°C. The MAX4675/MAX4676 are
ideal in low-distortion applications and are the preferred solution over mechanical relays in automated
test equipment or applications where current switching
is required. They are more reliable than mechanical
relays, have low power requirements (<1µA), and are
available in a space-saving 6-pin SOT23 package.
The MAX4675 has a single normally open (NO) switch,
and the MAX4676 has a single normally closed (NC)
switch.
♦ 3Ω (max) RON
♦ 0.7Ω (max) RON Flatness
♦ Dual ±2.7V to ±5.5V or Single +2.7V to +5.5V
Supply Range
♦ Off-Isolation
-75dB at 1MHz, Dual Supply
-65dB at 1MHz, Single Supply
♦ -3dB Bandwidth 250MHz
♦ Rail-to-Rail Signal Handling
The MAX4675/MAX4676 operate from either a single
+2.7V to +5.5V or dual ±2.7V to ±5.5V supplies, making them ideal for use in digital card applications and
single-ended 75Ω systems.
________________________Applications
Reed Relay Replacement
_______________Ordering Information
TEMP.
RANGE
PART
Test Equipment
Communications Systems
PBX, PABX Systems
PINPACKAGE
SOT
MARK
MAX4675EUT-T
-40°C to +85°C
6 SOT23-6
AAND
MAX4676EUT-T
-40°C to +85°C
6 SOT23-6
AANE
Audio Signal Routing
Avionics
ADC Systems
Data-Acquisition Systems
Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
V+ 1
6
IN
COM 2
5
NO
4
GND
MAX4675
V- 3
V+ 1
6
IN
COM 2
5
NC
4
GND
MAX4676
V- 3
SOT23
SOT23
MAX4675
IN
SWITCH
MAX4676
IN
SWITCH
0
1
OFF
ON
0
1
ON
OFF
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products
1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX4675/MAX4676
________________General Description
MAX4675/MAX4676
3Ω Single SPST Analog Switches
ABSOLUTE MAXIMUM RATINGS
V+ to GND ................................................................-0.3V to +6V
V- to GND .................................................................+0.3V to -6V
V+ to V- ..................................................................................12V
IN to GND .....................................................-0.3V to (V+ + 0.3V)
All Other Pins (Note 1) ..........................(V- - 0.3V) to (V+ + 0.3V)
Continuous Current (NO, NC, COM) ..............................±100mA
Peak Current (NO, NC, COM, pulsed at 1ms
(10% duty cycle).........................................................±200mA
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)............691mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°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.
Note 1: Signals on NO, NC, COM, or IN exceeding V+ or V- will be clamped by internal diodes. Limit forward diode current to maximum current rating.
ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES
(V+ = +5V ±10%, V- = -5V ±10%, GND = 0, VIH = +2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are
at TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
Input Voltage Range
On-Resistance
VCOM,
VNO, VNC
RON
On-Resistance Flatness
(Note 4)
RFLAT
NC or NO Off-Leakage
Current
IN_(OFF)
COM Off-Leakage Current
COM On-Leakage Current
ICOM(OFF)
ICOM(ON)
VV+ = 4.5V, V- = -4.5V, ICOM
= 50mA; VNO or VNC =
±3.3V
V+ = 4.5V, V- = -4.5V,
ICOM = 50mA; VNO or
VNC = ± 3.3V, 0
TA = +25°C
2.4
TA = TMIN to TMAX
4
TA = +25°C
0.4
TA = TMIN to TMAX
V+ = 5.5V, V- = -5.5V,
TA = +25°C
VCOM = 4.5V; VNO or VNC =
TA = TMIN to TMAX
±4.5V
3
0.7
1.0
-1
0.1
Ω
Ω
1
nA
-10
V+ = 5.5V, V- = -5.5V,
VCOM = +4.5V; VNO or
VNC = ±4.5V
TA = +25°C
-1
TA = TMIN to TMAX
-10
V+ = 5.5V, V- = -5.5V,
VCOM = ±4.5V; VNO or VNC
= ± 4.5V or floating
TA = +25°C
-2
TA = TMIN to TMAX
-20
10
0.1
1
nA
10
0.1
2
nA
20
LOGIC INPUT
Input Low Voltage
VIL
Input High Voltage
VIH
2.4
Input Leakage Current
IIN
-1
0.8
V
0.005
1
µA
135
300
V
DYNAMIC
Turn-On Time
Turn-Off Time
2
tON
tOFF
V+ = +4.5V, V- = -4.5V;
VNO or VNC = 3.3V,
RL= 300Ω, CL= 35pF, Figure 2
V+ = +4.5V, V- = -4.5V;
VNO or VNC = 3.3V,
RL= 300Ω, CL= 35pF, Figure 2
TA = +25°C
ns
TA = TMIN to TMAX
TA = +25°C
375
50
110
ns
TA = TMIN to TMAX
_______________________________________________________________________________________
125
3Ω Single SPST Analog Switches
(V+ = +5V ±10%, V- = -5V ±10%, GND = 0, VIH = +2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are
at TA = +25°C.) (Notes 2, 3)
PARAMETER
Charge Injection
SYMBOL
Q
CONDITIONS
MIN
TYP
MAX
UNITS
RGEN = 0Ω, CL = 1nF,
VGEN = 0, Figure 3
TA = +25°C
87
pC
TA = +25°C
-75
dB
250
MHz
Off-Isolation
VISO
RL = 50Ω, CL = 5pF,
f = 1MHz, Figure 4
On-Channel Bandwidth
(-3dB)
BW
RS = 50Ω, RL = 50Ω
C(N_OFF)
f = 1MHz, Figure 5
TA = +25°C
85
pF
C(COMOFF)
f = 1MHz, Figure 5
TA = +25°C
85
pF
C(ON)
f = 1MHz, Figure 5
TA = +25°C
350
pF
NC or NO Off-Capacitance
COM Off-Capacitance
On-Capacitance
POWER SUPPLY
Supply Voltage
±2.7
V+, V-
Positive Supply Current
I+
VIN = 0 or 5.5V, V+ =
5.5V, V- = -5.5V
Negative Supply Current
I-
VIN = 0 or 5.5V,
V+ = 5.5V, V- = -5.5V
TA = +25°C
±5.5
0.002
TA = TMIN to TMAX
1
10
TA = +25°C
-1
TA = TMIN to TMAX
-10
-0.002
V
µA
µA
ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY
(V+ = +5V ±10%, V- = 0, GND = 0, VIH = +2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
Input Voltage Range
On-Resistance
VCOM,
VNO, VNC
RON
On-Resistance Flatness
(Note 4)
RFLAT
NC or NO Off-Leakage
Current
IN_(OFF)
COM Off-Leakage Current
ICOM(OFF)
0
V+ = 4.5V; ICOM = 50mA;
VNO or VNC = 3.3V
TA = +25°C
V+ = 4.5V; ICOM = 50mA;
VNO or VNC = 1.5V, 2.5V,
3.3V
TA = +25°C
V+ = 5.5V; VNO or
VNC = 4.5V or 0;
VCOM = 0 or 4.5V
TA = +25°C
-1
TA = TMIN to TMAX
-10
TA = +25°C
-1
TA = TMIN to TMAX
-10
V+ = 5.5V; VNO or
VNC = 4.5V or 0;
VCOM = 0 or 4.5V
3.5
TA = TMIN to TMAX
5.75
7.5
0.4
TA = TMIN to TMAX
1.6
2
0.1
Ω
Ω
1
nA
10
0.1
1
nA
10
_______________________________________________________________________________________
3
MAX4675/MAX4676
ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES (continued)
MAX4675/MAX4676
3Ω Single SPST Analog Switches
ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY (continued)
(V+ = +5V ±10%, V- = 0, GND = 0, VIH = +2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Notes 2, 3)
PARAMETER
COM On-Leakage Current
SYMBOL
ICOM (ON)
CONDITIONS
V+ = 5.5V; VNO or
VNC = 0, 4.5V,
or floating;
VCOM = 0 or 4.5V
MIN
TYP
MAX
TA = +25°C
-2
0.2
2
TA = TMIN to TMAX
-20
UNITS
nA
20
LOGIC INPUT
Input Low Voltage
VIL
Input High Voltage
VIH
2.4
0.8
Input Leakage Current
IIN
-1
V
V
0.005
1
350
700
µA
DYNAMIC
Turn-On Time
Turn-Off Time
Charge Injection
Off-Isolation
tON
tOFF
Q
VISO
On-Channel Bandwidth
(-3dB)
NC or NO Off-Capacitance
COM Off-Capacitance
On-Capacitance
V+ = +4.5V;
VNO or VNC = +3.3V,
RL = 300Ω, CL= 35pF,
Figure 2
TA = +25°C
V+ = +4.5V; VNO or VNC =
+3.3V, RL = 300Ω,
CL = 35pF, Figure 2
TA = +25°C
ns
TA = TMIN to
TMAX
850
55
150
ns
TA = TMIN to
TMAX
160
RGEN = 0Ω, CL = 1nF,
VGEN = 2.5V, Figure 3
TA = +25°C
31
pC
RL = 50Ω, CL = 5pF,
f = 1MHz, Figure 4
TA = +25°C
-65
dB
150
MHz
RS = 50Ω, RL = 50Ω
C(N_OFF)
f = 1MHz, Figure 5
TA = +25°C
85
pF
C(COMOFF)
f = 1MHz, Figure 5
TA = +25°C
85
pF
C(ON)
f = 1MHz, Figure 5
TA = +25°C
350
pF
POWER SUPPLY
Supply Voltage
V+
Positive Supply Current
I+
2.7
VIN = 0 or 5V,
V+ = 5.5V
TA = +25°C
5.5
0.002
TA = TMIN to TMAX
1
10
V
µA
Note 2: Parameters are 100% tested at +25°C only and guaranteed by correlation through the full-rated temperature range.
Note 3: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in
this data sheet.
Note 4: Flatness is defined as the difference between the maximum and minimum value of RON as measured over the specified
analog signal ranges.
4
_______________________________________________________________________________________
3Ω Single SPST Analog Switches
V = ±2.5V
V+ = 5V
V- = -5V
2.5
18
MAX4675 toc02
2.7
MAX4675 toc01
4.0
3.5
ON-RESISTANCE
vs. VCOM (SINGLE SUPPLY)
ON-RESISTANCE vs. VCOM
AND TEMPERATURE (DUAL SUPPLIES)
TA = +85°C
14
V = ±5V
RON (Ω)
RON (Ω)
TA = +25°C
2.1
V+ = +3.3V
8
V+ = +5V
6
1.9
1.0
4
1.7
0.5
TA = 0°C
0
2
TA = -40°C
0
1.5
-6
-4
-2
0
2
4
6
-6 -5 -4 -3 -2 -1 0
1
2
3
4
5
0
6
1
2
3
VCOM (V)
VCOM (V)
ON-RESISTANCE vs. VCOM
AND TEMPERATURE (SINGLE SUPPLY)
ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
CHARGE INJECTION
vs. VCOM
4.0
3.5
3.0
TA = -40°C
2.5
TA = 0°C
12
2.0
2
3
4
5
70
ICOM(ON)
8
6
10
0
50
70
90
110
130
TURN-ON/TURN-OFF TIMES
vs. VCOM (DUAL SUPPLIES)
TURN-ON/TURN-OFF TIMES vs. VCOM
(SINGLE SUPPLY)
700
-4
-2
0
300
V+ = IV-|
250
600
tON, tOFF (ns)
tONB
150
tOFFA
100
tOFFB
tON
500
tONA
400
300
tOFFB
-4
-2
0
VCOM (V)
2
4
6
tOFF
50
0
-6
150
tOFFA
100
0
200
100
200
50
tON, tOFF (ns)
200
2
TURN-ON/TURN-OFF TIMES
vs. SUPPLY VOLTAGE (DUAL SUPPLIES)
A: V+ = +5.5V
B: V+ = +3V
tONB
-6
VCOM (V)
800
MAX4675 toc07
tONA
250
DUAL SUPPLIES
SINGLE SUPPLY
20
ICOM(OFF)
TEMPERATURE (°C)
A: V+ = +3.5V, V- = -3.5V
B: V+ = +5V, V- = -5V
50
30
VCOM (V)
300
60
40
4
6
6
80
MAX4675 toc08
1
4
90
0
0
6
100
10
2
V+ = +5V
5
MAX4675 toc06
V+ = 5V
V- = -5V
Q (pC)
4.5
14
MAX4675 toc05
TA = +85°C
ON/OFF-LEAKAGE CURRENT (nA)
MAX4675 toc04
TA = +25°C
tON, tOFF (ns)
4
VCOM (V)
5.0
RON (Ω)
V+ = +2.7V
10
MAX4675 toc09
RON (Ω)
2.0
1.5
12
2.3
V = ±3V
V- = 0
16
3.0
2.5
MAX4675 toc03
ON-RESISTANCE
vs. VCOM (DUAL SUPPLIES)
0
0
1
2
3
4
5
VCOM (V)
6
7
8
9
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
SUPPLY VOLTAGE (V+, V-)
_______________________________________________________________________________________
5
MAX4675/MAX4676
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
TURN-ON/TURN-OFF TIMES
vs. TEMPERATURE (DUAL SUPPLIES)
2.0
120
tON
1.0
0.5
250
tON
80
60
tOFF
40
2.0
2.5
3.0
3.5
4.0
4.5
5.0
-20
0
20
40
60
80
100
10
V+ = +5V
V- = -5V
8
110
FREQUENCY RESPONSE
MAX4675 toc13
10
60
TEMPERATURE (°C)
POWER-SUPPLY CURRENT
vs. TEMPERATURE
10
-3dB AT 250MHz
-10
I+
V+ = +5V
V- = -5V
BANDWIDTH
4
IGND
2
LOSS (dB)
I+, IGND, I- (nA)
-40
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
6
tOFF
0
-40
5.5
tON
150
50
0
0
200
100
V+ = +5V
V- = -5V
20
tOFF
V+ = +5V
V- = 0
300
tON, tOFF (ns)
tON, tOFF (ns)
100
1.5
350
MAX4675 toc14
VCOM = V+/2
MAX4675 toc11
140
MAX4675 toc10
2.5
TURN-ON/TURN-OFF TIMES
vs. TEMPERATURE (SINGLE SUPPLY)
MAX4675 toc12
TURN-ON/TURN-OFF TIMES
vs. SUPPLY VOLTAGE (SINGLE SUPPLY)
tON, tOFF (µs)
MAX4675/MAX4676
3Ω Single SPST Analog Switches
0
-2
-4
-30
-50
OFF-ISOLATION
-75dB AT 1MHz
-70
I-
-6
-90
-8
-10
-110
-40
-20
0
20
40
60
80
100
0.01
TEMPERATURE (°C)
0.1
1
10
100
1000
FREQUENCY (MHz)
Pin Description
PIN
6
NAME
FUNCTION
MAX4675
MAX4676
1
1
V+
2
2
COM
3
3
V-
4
4
GND
5
—
NO
Analog Switch Normally Open Terminal
—
5
NC
Analog Switch Normally Closed Terminal
6
6
IN
Logic Input
Positive Supply
Analog Switch Common Terminals
Negative Supply
Ground
_______________________________________________________________________________________
3Ω Single SPST Analog Switches
Overvoltage Protection
Proper power-supply sequencing is recommended for all
CMOS devices. Do not exceed the absolute maximum
ratings because stresses beyond the listed ratings can
cause permanent damage to the devices. Always
sequence V+ on first, then V-, followed by the logic
inputs, NO, NC, or COM. If proper power-supply
sequencing is not possible, add two small-signal diodes
(D1, D2) in series with the supply pins (Figure 1). Adding
diodes reduces the analog signal range to one diode
drop below V+ and one diode drop above V- but does
not affect the devices’ low switch resistance and low
leakage characteristics. Device operation is unchanged,
and the difference between V+ and V- should not
exceed 12V.
Power-supply bypassing improves noise margin and
prevents switching noise from propagating from the V+
supply to other components. A 0.1µF capacitor connected from V+ to GND is adequate for most applications.
V+
Vg
V-
Figure 1. Overvoltage Protection Using External Blocking
Diodes
Timing Diagrams/Test Circuits
MAX4675
MAX4676
V+
SWITCH
INPUT
V+
COM
NO
OR NC
LOGIC
INPUT
SWITCH
OUTPUT
50%
CL
35pF
t OFF
IN
LOGIC
INPUT
VOUT
V-
SWITCH
OUTPUT
0.9 x VOUT
t ON
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
RL
RL + RON
(
0.9 x V0UT
0
V-
VOUT = VCOM
50%
0
VOUT
RL
300Ω
GND
t r < 20ns
t f < 20ns
+3V
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
)
Figure 2. Switching Time
V+
MAX4675
MAX4676
∆VOUT
V+
RGEN
VOUT
COM
NC
OR NO
VOUT
IN
OFF
CL
V GEN
GND
IN
ON
OFF
VVVIN = 3.0V
IN
OFF
ON
OFF
Q = (∆V OUT )(C L )
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 3. Charge Injection
_______________________________________________________________________________________
7
MAX4675/MAX4676
Applications Information
Timing Diagrams/Test Circuits (continued)
V+
10nF
SIGNAL
GENERATOR 0dBm
COM
MAX4675
MAX4676
V+
V+
COM
IN
ANALYZER
V+
10nF
MAX4675
MAX4676
NC
OR NO
GND
V-
0 OR
2.4V
IN
CAPACITANCE
METER
f = 1MHz
0 OR
2.4V
NC OR
NO
GND
V-
VV-
Figure 4. Off-Isolation/On-Channel Bandwidth
Figure 5. Channel On/Off-Capacitance
Package Information
6LSOT.EPS
MAX4675/MAX4676
3Ω Single SPST Analog Switches
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.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2000 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.