LT1191
Ultrahigh Speed
Operational Amplifier
FEATURES
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Gain Bandwidth Product, A
V
= 1: 90MHz
Slew Rate: 450V/µs
Low Cost
Output Current:
±50mA
Settling Time: 110ns to 0.1%
Differential Gain Error: 0.07%, (R
L
= 1k)
Differential Phase Error: 0.02°, (R
L
= 1k)
High Open-Loop Gain: 20V/mV Min
Single Supply 5V Operation
Output Shutdown
The LT
®
1191 is a video operational amplifier optimized for
operation on
±5V
and a single 5V supply. Unlike many high
speed amplifiers, this amplifier features high open-loop
gain, over 90dB, and the ability to drive heavy loads to a
full-power bandwidth of 20MHz at 7V
P-P
. In addition to its
very fast slew rate, the LT1191 features a unity-gain-stable
bandwidth of 90MHz.
Because the LT1191 is a true operational amplifier, it is an
ideal choice for wideband signal conditioning, fast inte-
grators, active filters, and applications requiring speed,
accuracy and low cost.
The LT1191 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
Video Cable Drivers
Video Signal Processing
Fast Integrators
Pulse Amplifiers
D/A Current to Voltage Conversion
TYPICAL APPLICATIO
5V
7
V
IN1
3
Video MUX Cable Driver
+
–
LT1191
SHDN
5
4
–5V
1k
6
Inverter Pulse Response
2
CMOS IN
CH. SELECT
1k
1k
75Ω CABLE
75Ω
–5V
5V
V
IN2
3
5
74HC04
1k
74HC04
+
SHDN
LT1191
7
6
4
–5V
LT1191 • TA01
2
–
1k
A
V
= –1, C
L
= 10pF SCOPE PROBE
1k
U
LT1190 • TA02
U
U
1
LT1191
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
BAL 1
–IN 2
+IN 3
V
–
4
N8 PACKAGE
8-LEAD PDIP
8
7
6
5
BAL
V
+
OUT
SHDN
Total Supply Voltage (V
+
to V
–
) ............................. 18V
Differential Input Voltage ........................................
±6V
Input Voltage ..........................................................
±
V
S
Output Short-Circuit Duration (Note 2) ........ Continuous
Operating Temperature Range
LT1191M
(OBSOLETE) .............
–55°C to 125°C
LT1191C ............................................... 0°C to 70°C
Maximum Junction Temperature ......................... 150°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER
LT1191CN8
LT1191CS8
S8 PART MARKING
1191
LT1191MJ8
LT1191CJ8
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 100°C/W (N8)
T
JMAX
= 150°C,
θ
JA
= 150°C/W (S8)
J8 PACKAGE 8-LEAD CERDIP
T
JMAX
= 150°C,
θ
JA
= 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
SYMBOL
V
OS
I
OS
I
B
e
n
i
n
R
IN
C
IN
CMRR
PSRR
A
VOL
PARAMETER
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Current
Input Resistance
Input Capacitance
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Differential Mode
Common Mode
A
V
= +1
(Note 3)
f
O
= 10kHz
f
O
= 10kHz
V
S
=
±5V,
T
A
= 25°C, C
L
≤
10pF, Pin 5 open circuit unless otherwise noted.
MIN
LT1191M/C
TYP
MAX
1
0.2
±0.5
25
4
70
5
2
–2.5
60
60
20
4
6
±3.7
±6.7
325
17.2
100
75
75
45
9
12
±4
±7
450
23.9
90
130
1.25
2.2
25
110
160
3.5
5
9
1.7
±2.5
UNITS
mV
mV
µA
µA
nV/√Hz
pA/√Hz
kΩ
MΩ
pF
V
dB
dB
V/mV
V/mV
V/mV
V
V
V/µs
MHz
MHz
ns
ns
ns
%
ns
CONDITIONS
N8 Package
SO-8 Package
V
CM
= – 2.5V to 3.5V
V
S
=
±2.375V
to
±8V
R
L
= 1k, V
O
=
±3V
R
L
= 100Ω, V
O
=
±3V
V
S
=
±8V,
R
L
= 100Ω, V
O
=
±5V
V
S
=
±5V,
R
L
= 1k
V
S
=
±8V,
R
L
= 1k
A
V
= –2, R
L
= 1k (Notes 4, 9)
V
O
= 6V
P-P
(Note 5)
A
V
= 50, V
O
=
±1.5V,
20% to 80% (Note 9)
A
V
= 1, V
O
=
±125mV,
10% to 90%
A
V
= 1, V
O
=
±125mV,
50% to 50%
A
V
= 1, V
O
=
±125mV
3V Step, 0.1% (Note 6)
V
OUT
SR
FPBW
GBW
t
r1
, t
f1
t
r2
, t
f2
t
PD
t
s
Output Voltage Swing
Slew Rate
Full-Power Bandwidth
Gain Bandwidth Product
Rise Time, Fall Time
Rise Time, Fall Time
Propagation Delay
Overshoot
Settling Time
2
U
W
U
U
W W
W
LT1191
ELECTRICAL CHARACTERISTICS
SYMBOL
Diff A
V
Diff Ph
I
S
I
SHDN
t
ON
t
OFF
PARAMETER
Differential Gain
Differential Phase
Supply Current
Shutdown Supply Current
Shutdown Pin Current
Turn On Time
Turn Off Time
Pin 5 at
V
S
=
±5V,
T
A
= 25°C, C
L
≤
10pF, Pin 5 open circuit unless otherwise noted.
MIN
LT1191M/C
TYP
MAX
0.15
0.09
32
V
–
1.3
20
100
400
= 1k
38
2
50
UNITS
%
Deg
P-P
mA
mA
µA
ns
ns
CONDITIONS
R
L
= 150Ω, A
V
= 2 (Note 7)
R
L
= 150Ω, A
V
= 2 (Note 7)
Pin 5 at V
–
Pin 5 from V
–
to Ground, R
L
= 1k
Pin 5 from Ground to V
–
, R
L
V
S+
= 5V, V
S–
= 0V, V
CM
= 2.5V, T
A
= 25°C, C
L
≤
10pF, Pin 5 open circuit unless otherwise noted.
SYMBOL
V
OS
I
OS
I
B
CMRR
A
VOL
V
OUT
SR
GBW
I
S
I
SHDN
PARAMETER
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Voltage Range
Common Mode Rejection Ratio
Large-Signal Voltage Gain
Output Voltage Swing
Slew Rate
Gain Bandwidth Product
Supply Current
Shutdown Supply Current
Shutdown Pin Current
Pin 5 at V
–
Pin 5 at V
–
(Note 3)
V
CM
= 2V to 3.5V
R
L
= 100Ω to Ground, V
O
= 1V to 3V
R
L
= 100Ω to Ground
A
V
= –1, V
O
= 1V to 3V
V
OUT
High
V
OUT
Low
2
55
5
3.6
70
9
3.8
0.25
250
80
29
1.2
20
36
2
50
0.4
CONDITIONS
N8 Package
SO-8 Package
MIN
LT1191M/C
TYP
MAX
2
0.2
±0.5
7
9
1.2
±1.5
3.5
UNITS
mV
mV
µA
µA
V
dB
V/mV
V
V
V/µs
MHz
mA
mA
µA
The
q
denotes the specifications which apply over the full operating temperature range of – 55°C
≤
T
A
≤
125°C.
V
S
=
±5V,
Pin 5 open circuit unless otherwise noted.
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
CMRR
PSRR
A
VOL
V
OUT
I
S
I
SHDN
PARAMETER
Input Offset Voltage
Input V
OS
Drift
Input Offset Current
Input Bias Current
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Voltage Swing
Supply Current
Shutdown Supply Current
Shutdown Pin Current
Pin 5 at V
–
(Note 8)
Pin 5 at V
–
V
CM
= – 2.5V to 3.5V
V
S
=
±2.375V
to
±5V
R
L
= 1k, V
O
=
±3V
R
L
= 100, V
O
=
±3V
R
L
= 1k
CONDITIONS
N8 Package
q
q
q
q
q
q
q
q
q
q
q
q
MIN
LT1191M
TYP
2
8
0.2
±0.5
MAX
8
2
±2.5
UNITS
mV
µV/°C
µA
µA
dB
dB
V/mV
V/mV
V
55
55
16
2
±3.7
70
70
32
5
±3.9
32
1.5
20
38
2.5
mA
mA
µA
3
LT1191
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
CMRR
PSRR
A
VOL
V
OUT
I
S
I
SHDN
PARAMETER
Input Offset Voltage
Input V
OS
Drift
Input Offset Current
Input Bias Current
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Voltage Swing
Supply Current
Shutdown Supply Current
Shutdown Pin Current
The
q
denotes the specifications which apply over the full operating
temperature range of 0°C
≤
T
A
≤
70°C. V
S
=
±5V,
Pin 5 open circuit unless otherwise noted.
CONDITIONS
N8 Package
SO-8 Package
q
q
q
q
MIN
LT1191C
TYP
2
8
0.2
±0.5
MAX
6
10
1.7
±2.5
UNITS
mV
mV
µV/°C
µA
µA
dB
dB
V/mV
V/mV
V
V
CM
= – 2.5V to 3.5V
V
S
=
±
2.375V to
±
5V
R
L
= 1k, V
O
=
±
3V
R
L
= 100, V
O
=
±3V
R
L
= 1k
Pin 5 at V
–
(Note 8)
Pin 5 at V
–
q
q
q
q
q
q
q
q
58
58
20
3
±3.7
70
70
40
9
±3.9
32
1.4
20
38
2.1
mA
mA
µA
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
±1.5V
input step.
Note 5:
Full-power bandwidth is calculated from the slew rate
measurement:
FPBW = SR/2πV
P
.
Note 6:
Settling time measurement techniques are shown in “Take the
Guesswork Out of Settling Time Measurements,” EDN, September 19,
1985. A
V
= –1, R
L
= 1k.
Note 7:
NTSC (3.58MHz). For R
L
= 1k, Diff A
V
= 0.07%, Diff Ph = 0.02°.
Note 8:
See Applications section for shutdown at elevated temperatures.
Do not operate the shutdown above T
J
> 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).
Optional Offset Nulling Circuit
5V
3
+
–
1
7
LT1191
6
4
8
–5V
2
INPUT OFFSET VOLTAGE CAN BE ADJUSTED OVER A
±100mV
RANGE WITH A 1kΩ TO 10kΩ POTENTIOMETER
LT1191 • TA03
4
LT1191
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current
vs Common Mode Voltage
4
3
V
S
=
±5V
–0.3
COMMON MODE VOLTAGE (V)
INPUT BIAS CURRENT (
µ
A)
INPUT BIAS CURRENT (µA)
2
1
25°C
0
–1
–2
–4
–3
1
3
–2 –1
0
2
COMMON MODE VOLTAGE (V)
4
–55°C
125°C
Equivalent Input Noise Voltage
vs Frequency
EQUIVALENT INPUT NOISE CURRENT (pA/
√
Hz)
EQUIVALENT INPUT NOISE VOLTAGE (nV/
√
Hz)
300
250
200
150
100
50
0
10
100
SUPPLY CURRENT (mA)
1k
10k
FREQUENCY (Hz)
Shutdown Supply Current
vs Temperature
5.0
V
S
=
±5V
50k
SHUTDOWN SUPPLY CURRENT (mA)
OPEN-LOOP VOLTAGE GAIN (V/V)
V
SHDN
= –V
EE
+ 0.4V
4.0
3.5
3.0 V
SHDN
= –V
EE
+ 0.2V
2.5
2.0
V
SHDN
= –V
EE
1.5
1.0
–50
–25
0
25
75
50
TEMPERATURE (°C)
100
125
40k
R
L
= 1k
OPEN-LOOP VOLTAGE GAIN (V/V)
4.5
U W
LT1191 • TPC01
Input Bias Current
vs Temperature
V
S
=
±5V
10
8
6
4
2
0
–2
–4
–6
–8
–0.8
–50
–10
–25
50
0
25
75
TEMPERATURE (°C)
100
125
Common Mode Voltage
vs Supply Voltage
–55°C
25°C
+V COMMON MODE
125°C
–0.4
+I
B
–0.5
I
OS
–0.6
–I
B
–0.7
–V COMMON MODE
–55°C
25°C
125°C
0
2
6
4
8
±V
SUPPLY VOLTAGE (V)
10
LT1191 • TPC02
LT1191 • TPC03
Equivalent Input Noise Current
vs Frequency
80
V
S
=
±5V
T
A
= 25°C
R
S
= 100k
Supply Current vs Supply Voltage
40
V
S
=
±5V
T
A
= 25°C
R
S
= 0Ω
60
30
–55°C
25°C
20
125°C
40
20
10
0
10
100
1k
10k
FREQUENCY (Hz)
100k
0
0
2
8
4
6
±SUPPLY
VOLTAGE (V)
10
100k
LT1191 • TPC04
LT1191 • TPC05
LT1191 • TPC06
Open-Loop Voltage Gain
vs Temperature
50k
Open-Loop Voltage Gain
vs Load Resistance
V
S
=
±5V
V
O
=
±3V
T
A
= 25°C
40k
30k
30k
20k
R
L
= 100Ω
V
S
=
±5V
V
O
=
±3V
–25
50
0
25
75
TEMPERATURE (°C)
100
125
20k
10k
10k
0
–50
0
10
100
LOAD RESISTANCE (Ω)
1000
LT1191 • TPC09
LT1191 • TPC07
LT1191 • TPC08
5
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