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Jameco Part Number 1732756
LT1190
Ultrahigh Speed
Operational Amplifier
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FEATURES
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DESCRIPTIO
The LT®1190 is a video operational amplifier optimized for
operation on ±5V, and a single 5V supply. Unlike many
high speed amplifiers, this amplifier features high openloop gain, over 85dB, and the ability to drive heavy loads
to a full-power bandwidth of 20MHz at 7VP-P. In addition
to its very fast slew rate, the LT1190 features a unitygain-stable bandwidth of 50MHz and a 75° phase margin,
making it extremely easy to use.
Gain Bandwidth Product, AV = 1: 50MHz
Slew Rate: 450V/µs
Low Cost
Output Current: ±50mA
Settling Time: 140ns to 0.1%
Differential Gain Error: 0.1%, (RL = 1k)
Differential Phase Error: 0.06°, (RL = 1k)
High Open-Loop Gain: 10V/mV Min
Single Supply 5V Operation
Output Shutdown
Because the LT1190 is a true operational amplifier, it is an
ideal choice for wideband signal conditioning, fast integrators, active filters, and applications requiring speed,
accuracy and low cost.
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APPLICATIO S
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The LT1190 is available in 8-pin PDIP and SO packages
with standard pinouts. The normally unused Pin 5 is used
for a shutdown feature that shuts off the output and
reduces power dissipation to a mere 15mW.
Video Cable Drivers
Video Signal Processing
Fast Integrators
Pulse Amplifiers
D/A Current to Voltage Conversion
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
Video MUX Cable Driver
5V
7
3
VIN1
+
2
–
CMOS IN
CH. SELECT
Inverter Pulse Response
6
LT1190
SHDN
5
4
1k
–5V
1k
1k
74HC04
75Ω CABLE
74HC04
75Ω
1k
–5V
5V
VIN2
3
5
+ SHDN
7
6
LT1190
2
1k
–
1k
AV = – 1, CL = 10pF SCOPE PROBE
4
1190 TA02
–5V
LT1190 • TA01
1
LT1190
W W
W
AXI U
U
ABSOLUTE
RATI GS
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U
W
PACKAGE/ORDER I FOR ATIO
(Note 1)
Total Supply Voltage (V + to V –) ............................. 18V
Differential Input Voltage ....................................... ± 6V
Input Voltage .......................................................... ± VS
Output Short-Circuit Duration (Note 2) ........ Continuous
Maximum Junction Temperature ......................... 150°C
Operating Temperature Range
LT1190M (OBSOLETE) ............. –55°C to 125°C
LT1190C ............................................... 0°C to 70°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER
TOP VIEW
BAL 1
8
BAL
–IN 2
7
V+
+IN 3
6
OUT
V– 4
5
SHDN
S8 PACKAGE
8-LEAD PLASTIC SO
N8 PACKAGE
8-LEAD PDIP
LT1190CN8
LT1190CS8
S8 PART MARKING
1190
TJMAX = 150°C, θJA = 100°C/W (N8)
TJMAX = 150°C, θJA = 150°C/W (S8)
LT1190MJ8
LT1190CJ8
J8 PACKAGE 8-LEAD CERDIP
TJMAX = 150°C, θJA = 100°C/W
OBSOLETE PACKAGE
Consider the N8 or S8 Packages for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature
ranges.
ELECTRICAL CHARACTERISTICS
VS = ± 5V, TA = 25°C, CL ≤ 10pF, Pin 5 open circuit unless otherwise noted.
MIN
LT1190M/C
TYP
MAX
SYMBOL PARAMETER
CONDITIONS
VOS
Input Offset Voltage
N8 Package
SO-8 Package
IOS
Input Offset Current
0.2
1.7
µA
IB
Input Bias Current
±0.5
±2.5
µA
en
Input Noise Voltage
in
Input Noise Current
RIN
Input Resistance
3
fO = 10kHz
fO = 10kHz
Differential Mode
Common Mode
CIN
CMRR
Input Capacitance
AV = 1
Input Voltage Range
(Note 3)
Common Mode Rejection Ratio
VCM = – 2.5V to 3.5V
10
15
mV
mV
50
nV/√Hz
4
pA/√Hz
130
kΩ
5
MΩ
2.2
– 2.5
60
UNITS
pF
3.5
70
V
dB
PSRR
Power Supply Rejection Ratio
VS = ± 2.375V to ± 8V
60
70
dB
AVOL
Large-Signal Voltage Gain
RL = 1k, VO = ± 3V
RL = 100Ω, VO = ±3V
VS = ± 8V, RL = 100Ω, VO = ± 5V
10
2.5
3.5
22
6
12
V/mV
V/mV
V/mV
VOUT
Output Voltage Swing
VS = ±5V, RL = 1k
VS = ±8V, RL = 1k
±3.7
±6.7
±4
±7
V
V
SR
Slew Rate
AV = –1, RL = 1k (Notes 4, 9)
325
450
V/µs
FPBW
Full-Power Bandwidth
VO = 6VP-P (Note 5)
17.2
23.9
MHz
GBW
Gain Bandwidth Product
50
MHz
tr1, t f1
Rise Time, Fall Time
AV = 50, VO = ± 1.5V, 20% to 80%, (Note 9)
tr2, t f2
Rise Time, Fall Time
AV = 1, VO = ± 125mV, 10% to 90%
1.9
ns
tPD
Propagation Delay
AV = 1, VO = ± 125mV, 50% to 50%
2.4
ns
Overshoot
AV = 1, VO = ± 125mV
5
%
Settling Time
3V Step, 0.1% (Note 6)
140
ns
ts
2
175
250
325
ns
LT1190
ELECTRICAL CHARACTERISTICS
VS = ± 5V, TA = 25°C, CL ≤ 10pF, Pin 5 open circuit unless otherwise noted.
LT1190M/C
SYMBOL
PARAMETER
CONDITIONS
Diff AV
Differential Gain
RL = 150Ω, AV = 2 (Note 7)
MIN
0.35
TYP
Diff Ph
Differential Phase
RL = 150Ω, AV = 2 (Note 7)
0.16
IS
Supply Current
32
MAX
UNITS
%
DegP-P
38
mA
Shutdown Supply Current
Pin 5 at V –
1.3
2
mA
Shutdown Pin Current
Pin 5 at V –
20
50
µA
tON
Turn On Time
100
ns
tOFF
Turn Off Time
Pin 5 from V – to Ground, RL = 1k
Pin 5 from Ground to V –, RL = 1k
400
ns
ISHDN
VS+ = 5V, VS– = 0V, VCM = 2.5V, TA = 25°C, CL ≤ 10pF, Pin 5 open circuit unless otherwise noted.
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
N8 Package
SO-8 Package
IOS
Input Offset Current
0.2
1.2
µA
IB
Input Bias Current
±0.5
±1.5
µA
3.5
V
Input Voltage Range
MIN
LT1190M/C
TYP
MAX
SYMBOL
3
(Note 3)
2
11
15
UNITS
mV
mV
CMRR
Common Mode Rejection Ratio
VCM = 2V to 3.5V
55
70
dB
AVOL
Large-Signal Voltage Gain
RL = 100Ω to Ground, VO = 1V to 3V
2.5
7
V/mV
VOUT
Output Voltage Swing
RL = 100Ω to Ground
3.6
3.8
SR
Slew Rate
AV = –1, VO = 1V to 3V
GBW
Gain Bandwidth Product
IS
Supply Current
VOUT High
VOUT Low
ISHDN
0.25
24.5
V
0.4
V
250
V/µs
47
MHz
29
36
mA
Shutdown Supply Current
Pin 5 at V –
1.2
2
mA
Shutdown Pin Current
Pin 5 at V –
20
50
µA
The ● denotes the specifications which apply over the full operating temperature range of – 55°C ≤ TA ≤ 125°C.
VS = ±5V, Pin 5 open circuit unless otherwise noted.
LT1190M
TYP
MAX
●
5
14
Input VOS Drift
●
16
IOS
Input Offset Current
●
0.2
2
µA
IB
Input Bias Current
●
±0.5
±2.5
µA
CMRR
Common Mode Rejection Ratio
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
N8 Package
∆VOS /∆T
MIN
VCM = –2.5V to 3.5V
●
55
UNITS
mV
µV/°C
70
dB
PSRR
Power Supply Rejection Ratio
VS = ± 2.375V to ± 5V
●
55
70
dB
AVOL
Large-Signal Voltage Gain
RL = 1k, VO = ± 3V
RL = 100Ω, VO = ±3V
●
●
8
1
16
2.5
V/mV
V/mV
VOUT
Output Voltage Swing
RL = 1k
●
±3.7
±3.9
IS
Supply Current
ISHDN
V
●
32
38
mA
2.5
mA
Shutdown Supply Current
Pin 5 at V – (Note 8)
●
1.5
Shutdown Pin Current
Pin 5 at V –
●
20
µA
3
LT1190
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range of 0°C ≤ TA ≤ 70°C. VS = ±5V, Pin 5 open circuit unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
VOS
Input Offset Voltage
N8 Package
SO-8 Package
∆VOS /∆T
LT1190C
TYP
MAX
●
3
Input VOS Drift
●
16
IOS
Input Offset Current
●
0.2
1.7
µA
IB
Input Bias Current
±0.5
±2.5
µA
CMRR
Common Mode Rejection Ratio
VCM = – 2.5V to 3.5V
●
58
70
dB
PSRR
Power Supply Rejection Ratio
VS = ± 2.375V to ± 5V
●
58
70
dB
AVOL
Large-Signal Voltage Gain
RL = 1k, VO = ±3V
RL = 100Ω, VO = ±3V
●
●
9
2
20
6
V/mV
V/mV
VOUT
Output Voltage Swing
RL = 1k
●
±3.7
±3.9
IS
Supply Current
ISHDN
●
mV
mV
µV/°C
V
●
32
38
mA
Shutdown Supply Current
Pin 5 at V – (Note 8)
●
1.4
2.1
mA
Shutdown Pin Current
Pin 5 at V –
●
20
Optional Offset Nulling Circuit
5V
3
7
+
6
LT1190
2
–
1
µA
Note 6: Settling time measurement techniques are shown in “Take the
Guesswork Out of Settling Time Measurements,” EDN, September 19,
1985. AV = –1, RL = 1k.
Note 7: NTSC (3.58MHz). For RL = 1k, Diff AV = 0.1%, Diff Ph = 0.06°.
Note 8: See Applications section for shutdown at elevated temperatures.
Do not operate the shutdown above TJ > 125°C.
Note 9: AC parameters are 100% tested on the ceramic and plastic DIP
packaged parts (J and N suffix) and are sample tested on every lot of the
SO packaged parts (S suffix).
Note 1: Absolute maximum ratings are those values beyond which the life
of the device may be impaired.
Note 2: A heat sink is required to keep the junction temperature below
absolute maximum when the output is shorted.
Note 3: Exceeding the input common mode range may cause the output
to invert.
Note 4: Slew rate is measured between ± 1V on the output, with a ± 3V
input step.
Note 5: Full-power bandwidth is calculated from the slew rate
measurement:
FPBW = SR/2πVP.
4
8
–5V
INPUT OFFSET VOLTAGE CAN BE ADJUSTED OVER A ±150mV
RANGE WITH A 1kΩ TO 10kΩ POTENTIOMETER
LT1190 • TA03
4
11
18
UNITS
LT1190
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TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current
vs Common Mode Voltage
–0.3
VS = ±5V
INPUT BIAS CURRENT (µA)
INPUT BIAS CURRENT (µA)
3
2
1
25°C
0
Common Mode Voltage
vs Supply Voltage
–55°C
125°C
–1
10
VS = ±5V
–0.4
+I B
–0.5
IOS
–0.6
–I B
–0.7
–55°C
25°C
8
COMMON MODE VOLTAGE (V)
4
Input Bias Current
vs Temperature
6
+V COMMON MODE
4
125 °C
2
0
–2
–55°C
25°C
125°C
–4
–V COMMON MODE
–6
–8
–2
–3
1
3
–2 –1
0
2
COMMON MODE VOLTAGE (V)
4
–10
–25
50
0
25
75
TEMPERATURE (°C)
LT1190 • TPC01
1200
1000
800
600
400
200
0
100
10
1k
10k
FREQUENCY (Hz)
80
VS = ±5V
TA = 25°C
RS = 100k
40
20
0
10
100
1k
10k
FREQUENCY (Hz)
Shutdown Supply Current
vs Temperature
VSHDN = –VEE + 0.4V
3.5
VSHDN = –VEE + 0.2V
2.5
2.0
VSHDN = –VEE
1.5
1.0
–50
–25
0
25
75
50
TEMPERATURE (°C)
100
125
LT1190 • TPC07
OPEN-LOOP VOLTAGE GAIN (V/V)
SHUTDOWN SUPPLY CURRENT (mA)
30k
4.5
3.0
–55°C
20
125°C
25°C
10
0
100k
0
2
8
4
6
±SUPPLY VOLTAGE (V)
VS = ± 5V
VO = ± 3V
Open-Loop Voltage Gain
vs Load Resistance
30k
RL = 1k
20k
10k
0
–50
10
LT1190 • TPC06
Open-Loop Voltage Gain
vs Temperature
VS = ±5V
4.0
30
LT1190 • TPC05
LT1190 • TPC04
5.0
Supply Current vs Supply Voltage
60
100k
10
40
SUPPLY CURRENT (mA)
1400
EQUIVALENT INPUT NOISE CURRENT (pA/√ Hz)
EQUIVALENT INPUT NOISE VOLTAGE (nV/ √Hz)
1600
6
4
8
±V SUPPLY VOLTAGE (V)
LT1190 • TPC03
Equivalent Input Noise Current
vs Frequency
VS = ±5V
TA = 25°C
RS = 0Ω
1800
2
0
125
LT1190 • TPC02
Equivalent Input Noise Voltage
vs Frequency
2000
100
OPEN-LOOP VOLTAGE GAIN (V/V)
–4
–0.8
–50
RL = 100Ω
VS = ±5V
VO = ±3V
20k
10k
0
–25
50
0
25
75
TEMPERATURE (°C)
100
125
LT1190 • TPC08
10
100
LOAD RESISTANCE (Ω)
1000
LT1190 • TPC09
5
LT1190
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Gain Bandwidth Product
vs Supply Voltage
Gain, Phase vs Frequency
100
40
40
20
20
GAIN
0
0
–20
100k
TA = –55°C, 25°C, 125°C
45
40
35
10M
100M
FREQUENCY (Hz)
0
2
6
4
8
±V SUPPLY VOLTAGE (V)
75
70
70
65
65
60
60
UNITY GAIN FREQUENCY
55
50
50
40
–50 –25
45
25
75
0
50
TEMPERATURE (°C)
100
COMMON MODE REJECTION RATIO (dB)
PHASE MARGIN
PHASE MARGIN (DEGREES)
UNITY GAIN FREQUENCY (MHz)
60
80
VS = ±5V
RL = 1k
50
1k
30
20
10
0
100k
10
80
10M
100M
FREQUENCY (Hz)
VS = ±5V
VRIPPLE = ±300mV
TA = 25°C
60
40
–PSRR
20
+PSRR
0
1G
1k
5
+VOUT, 25°C,
125°C, –55°C
4
2
0
–2
–VOUT, –55°C,
25°C, 125°C
–4
VS = ± 5V
3
TA = 25°C
1
TA = 125°C
–1
TA = 125°C
–3
LT1190 • TPC16
6
TA = –55°C, 25°C
–5
0
2
4
6
8
±V SUPPLY VOLTAGE (V)
100M
TA = –55°C
–8
–10
125
10M
Output Voltage Swing
vs Load Resistance
–6
100
1M
100k
FREQUENCY (Hz)
10k
LT1190 • TPC15
RL = 1k
8
OUTPUT SWING (V)
80
100M
LT1190 • TPC12
Output Swing vs Supply Voltage
90
50
0
25
75
TEMPERATURE (°C)
10M
LT1190 • TPC14
VS = ± 5V
–25
100k
1M
FREQUENCY (Hz)
–20
1M
6
70
–50
10k
Power Supply Rejection Ratio
vs Frequency
40
40
125
Output Short-Circut Current
vs Temperature
OUTPUT SHORT-CIRCUIT CURRENT (mA)
10
VS = ±5V
TA = 25°C
RL = 1k
LT1190 • TPC13
100
AV = –10
0.1
Common Mode Rejection Ratio
vs Frequency
80
45
AV = –1
LT1190 • TPC11
Unity Gain Frequency and
Phase Margin vs Temperature
55
AV = –100
1
0.01
25
1G
LT1190 • TPC10
75
10
30
–20
1M
OUTPUT IMPEDANCE (Ω )
60
VS = ±5V
TA = 25°C
50
POWER SUPPLY REJECTION RATIO (dB)
VOLTAGE GAIN (dB)
60
PHASE MARGIN (DEGREES)
80
VS = ±5V
TA = 25°C
RL = 1k
80
OUTPUT VOLTAGE SWING (V)
PHASE
Output Impedance vs Frequency
100
55
GAIN BANDWIDTH PRODUCT (MHz)
100
10
LT1190 • TPC17
10
100
LOAD RESISTANCE (Ω)
1000
LT1190 • TPC18
LT1190
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Output Voltage Step
vs Settling Time, AV = – 1
VS = ±5V
TA = 25°C
RL = 1k
VO = ±2V
4
–SLEW RATE
OUTPUT VOLTAGE STEP (V)
SLEW RATE (V/µs)
600
500
+SLEW RATE
400
300
–50
4
VS = ±5V
TA = 25°C
RL = 1k
2
Output Voltage Step
vs Settling Time, AV = +1
10mV
1mV
OUTPUT VOLTAGE STEP (V)
Slew Rate vs Temperature
0
–2
10mV
1mV
0
25
50
75
TEMPERATURE (°C)
100
125
LT1190 • TPC19
Large-Signal Transient Response
AV = +1, CL = 10pF SCOPE PROBE
1190 G22
1mV
2
10mV
0
–2
10mV
–4
–25
VS = ±5V
TA = 25°C
RL = 1k
1mV
–4
50
70
90 110 130 150
SETTLING TIME (ns)
170
190
0
50
100 150 200 250
SETTLING TIME (ns)
LT1190 • TPC20
Small-Signal Transient Response
AV = +1, SMALL-SIGNAL RISE TIME, 1190 G23
WITH FET PROBES
300
350
LT1190 • TPC21
Output Overload
AV = –1, VIN = 12VP-P
1190 G24
7
LT1190
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APPLICATIO S I FOR ATIO
Power Supply Bypassing
The LT1190 is quite tolerant of power supply bypassing.
In some applications a 0.1µF ceramic disc capacitor
placed 1/2 inch from the amplifier is all that is required. A
scope photo of the amplifier output with no supply
bypassing is used to demonstrate this bypassing tolerance, RL = 1kΩ.
No Supply Bypass Capacitors
In most applications, and those requiring good settling
time, it is important to use multiple bypass capacitors. A
0.1µF ceramic disc in parallel with a 4.7µF tantalum is
recommended. Two oscilloscope photos with different
bypass conditions are used to illustrate the settling time
characteristics of the amplifier. Note that although the
output waveform looks acceptable at 1V/DIV, when amplified to 1mV/DIV the settling time to 2mV is 4.244µs for the
0.1µF bypass; the time drops to 163ns with multiple
bypass capacitors.
Settling Time Poor Bypass
VOUT
0V 1mV/DIV
VOUT
1V/DIV
LT1190 • TA04
AV = –1, IN DEMO BOARD, RL = 1kΩ
Supply bypassing can also affect the response in the
frequency domain. It is possible to see a slight 1dB rise in
the frequency response at 130MHz depending on the gain
configuration, supply bypass, inductance in the supply
leads and printed circuit board layout. This can be further
minimized by not using a socket.
LT1190 • TA06
SETTLING TIME TO 2mV, AV = –1
SUPPLY BYPASS CAPACITORS = 0.1µF
Settling Time Good Bypass
Closed-Loop Voltage Gain vs Frequency
CLOSED-LOOP VOLTAGE GAIN (dB)
20
VS = ±5V
TA = 25°C
RL = 1k
10
AV = 2
AV = 1
0
LT1190 • TA07
SETTLING TIME TO 2mV, AV = –1
SUPPLY BYPASS CAPACITORS = 0.1µF + 4.7µF TANTALUM
–10
–20
100k
1M
10M
100M
FREQUENCY (Hz)
1G
LT1190 • TA05
8
VOUT
0V 1mV/DIV
VOUT
1V/DIV
LT1190
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APPLICATIO S I FOR ATIO
Cable Terminations
Using the Shutdown Feature
The LT1190 operational amplifier has been optimized as a
low cost video cable driver. The ±50mA guaranteed output
current enables the LT1190 to easily deliver 7.5VP-P into
100Ω, while operating on ±5V supplies or 2.6VP-P on a
single 5V supply.
The LT1190 has a unique feature that allows the amplifier
to be shut down for conserving power or for multiplexing
several amplifiers onto a common cable. The amplifier will
shut down by taking Pin 5 to V –. In shutdown, the
amplifier dissipates 15mW while maintaining a true high
impedance output state of 15kΩ in parallel with the
feedback resistors. The amplifiers must be used in a
noninverting configuration for MUX applications. In inverting configurations the input signal is fed to the output
through the feedback components. The following scope
photos show that with very high RL, the output is truly high
impedance; the output slowly decays toward ground.
Additionally, when the output is loaded with as little as 1kΩ
the amplifier shuts off in 400ns. This shutoff can be under
the control of HC CMOS operating between 0V and – 5V.
Double Terminated Cable Driver
3
2
RG
+
5V
7
LT1190
–
6
4
–5V
75Ω CABLE
RFB
75Ω
Cable Driver Voltage Gain vs Frequency
CLOSED-LOOP VOLTAGE GAIN (dB)
10
8
6
4
2
0
AV = 2
RFB = 1k
RG = 330Ω
VS = ±5V
TA = 25°C
Output Shutdown
AV = 1
RFB = 1k
RG = 1k
0V
VSHDN
–2
– 5V
–4
–6
–8
–10
100k
VOUT
1M
10M
FREQUENCY (Hz)
100M
LT1190 • TA08
When driving a cable it is important to terminate the cable
to avoid unwanted reflections. This can be done in one of
two ways: single termination or double termination. With
single termination, the cable must be terminated at the
receiving end (75Ω to ground) to absorb unwanted energy. The best performance can be obtained by double
termination (75Ω in series with the output of the amplifier,
and 75Ω to ground at the other end of the cable). This
termination is preferred because reflected energy is absorbed at each end of the cable. When using the double
termination technique it is important to note that the signal
is attenuated by a factor of 2, or 6dB. This can be compensated for by taking a gain of 2, or 6dB in the amplifier. The
cable driver has a – 3dB bandwidth in excess of 30MHz
while driving the 150Ω load.
LT1190 • TA09
1MHz SINE WAVE GATED OFF WITH
SHUTDOWN PIN, AV = 1, RL = SCOPE PROBE
Output Shutdown
0V
VSHDN
– 5V
VOUT
LT1190 • TA10
1MHz SINE WAVE GATED OFF WITH
SHUTDOWN PIN, AV = 1, RL = 1kΩ
9
LT1190
U
W
U U
APPLICATIO S I FOR ATIO
The ability to maintain shutoff is shown on the curve
Shutdown Supply Current vs Temperature in the Typical
Performance Characteristics section. At very high
elevated temperatures it is important to hold the shutdown pin close to the negative supply to keep the supply
current from increasing.
Other precautions include:
Murphy Circuits
3. PC board socket may reduce stability.
There are several precautions the user should take when
using the LT1190 in order to realize its full capability.
Although the LT1190 can drive a 50pF load, isolating the
capacitance with 10Ω can be helpful. Precautions primarily have to do with driving large capacitive loads.
4. A feedback resistor of 1k or lower reduces the effects of
stray capacitance at the inverting input. (For instance,
closed-loop gain of 2 can use RFB = 300Ω and RG =
300Ω.)
Driving Capacitive Load
Driving Capacitive Load
1. Use a ground plane (see Design Note 50, High Frequency Amplifier Evaluation Board).
2. Do not use high source impedances. The input
capacitance of 2pF and RS = 10k for instance, will give
an 8MHz – 3dB bandwidth.
LT1190 • TA11
LT1190 • TA12
AV = –1, IN DEMO BOARD, CL = 50pF
AV = –1, IN DEMO BOARD, CL = 50pF
WITH 10Ω ISOLATING RESISTOR
Murphy Circuits
5V
5V
3
+
7
6
LT1190
2
–
3
COAX
–5V
7
LT1190
2
4
+
–
5V
3
6
7
LT1190
2
4
–5V
+
–
1X SCOPE
PROBE
6
4
–5V
SCOPE
PROBE
LT1190 • TA13
An Unterminated Cable Is
a Large Capacitive Load
10
A 1X Scope Probe Is a
Large Capacitive Load
A Scope Probe on the Inverting
Input Reduces Phase Margin
LT1190
W
W
SI PLIFIED SCHE ATIC
7 V+
VBIAS
VBIAS
CM
+
3
–
2
CFF
+V
6 VOUT
+V
*
4 V–
LT1190 • TA14
5
1
8
SHDN
BAL
BAL
*SUBSTRATE DIODE, DO NOT FORWARD BIAS
U
PACKAGE DESCRIPTIO
Dimensions in inches (millimeters) unless otherwise noted.
J8 Package
8-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
CORNER LEADS OPTION
(4 PLCS)
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
0.300 BSC
(0.762 BSC)
0.200
(5.080)
MAX
0.045 – 0.068
(1.143 – 1.727)
FULL LEAD
OPTION
0.015 – 0.060
(0.381 – 1.524)
0.008 – 0.018
(0.203 – 0.457)
0.005
(0.127)
MIN
0.405
(10.287)
MAX
8
7
6
5
0.025
(0.635)
RAD TYP
0.220 – 0.310
(5.588 – 7.874)
0° – 15°
1
0.045 – 0.065
(1.143 – 1.651)
0.014 – 0.026
(0.360 – 0.660)
0.100
(2.54)
BSC
2
3
4
J8 1298
0.125
3.175
MIN
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
OBSOLETE PACKAGE
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LT1190
U
PACKAGE DESCRIPTIO
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
0.300 – 0.325
(7.620 – 8.255)
0.009 – 0.015
(0.229 – 0.381)
(
0.045 – 0.065
(1.143 – 1.651)
+0.889
–0.381
0.130 ± 0.005
(3.302 ± 0.127)
0.065
(1.651)
TYP
8
7
6
5
1
2
3
4
0.255 ± 0.015*
(6.477 ± 0.381)
+0.035
0.325 –0.015
8.255
0.400*
(10.160)
MAX
)
0.125
(3.175) 0.020
MIN
(0.508)
MIN
0.018 ± 0.003
0.100
(2.54)
BSC
N8 1098
(0.457 ± 0.076)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
0.010 – 0.020
× 45°
(0.254 – 0.508)
0.008 – 0.010
(0.203 – 0.254)
0.053 – 0.069
(1.346 – 1.752)
0°– 8° TYP
0.016 – 0.050
(0.406 – 1.270)
0.014 – 0.019
(0.355 – 0.483)
TYP
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
8
7
6
5
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
SO8 1298
1
2
3
4
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1357
High Speed Operational Amplifier
50MHz Gain Bandwidth, 800V/µs Slew Rate, IS = 5mA Max
LT1360
High Speed Operational Amplifier
25MHz Gain Bandwidth, 600V/µs Slew Rate, IS = 2.5mA Max
12
Linear Technology Corporation
1190fa LT/CP 0801 1.5K REV A • PRINTED IN THE USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 1991