LT1351
250µA, 3MHz, 200V/µs
Operational Amplifier
FEATURES
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DESCRIPTION
The LT
®
1351 is a low power, high speed, high slew rate
operational amplifier with outstanding AC and DC perfor-
mance. The LT1351 features lower supply current, lower
input offset voltage, lower input bias current and higher
DC gain than devices with comparable bandwidth. The
circuit combines the slewing performance of a current
feedback amplifier in a true operational amplifier with
matched high impedance inputs. The high slew rate en-
sures that the large-signal bandwidth is not degraded. The
amplifier is a single gain stage with outstanding settling
characteristics which make the circuit an ideal choice for
data acquisition systems. The output drives a 1kΩ load to
±13V
with
±15V
supplies and a 500Ω load to
±3.4V
on
±5V
supplies. The amplifier is also stable with any capacitive
load which makes it useful in buffer or cable driver
applications.
The LT1351 is a member of a family of fast, high perfor-
mance amplifiers using this unique topology and employ-
ing Linear Technology Corporation’s advanced
complementary bipolar processing. For dual and quad
amplifier versions of the LT1351 see the LT1352/LT1353
data sheet. For higher bandwidth devices with higher
supply current see the LT1354 through LT1365 data sheets.
Singles, duals and quads of each amplifier are available.
, LTC and LT are registered trademarks of Linear Technology Corporation.
C-Load is a trademark of Linear Technology Corporation.
3MHz Gain Bandwidth
200V/µs Slew Rate
250µA Supply Current
Available in Tiny MSOP Package
C-Load
TM
Op Amp Drives All Capacitive Loads
Unity-Gain Stable
Power Saving Shutdown Feature
Maximum Input Offset Voltage: 600µV
Maximum Input Bias Current: 50nA
Maximum Input Offset Current: 15nA
Minimum DC Gain, R
L
= 2k: 30V/mV
Input Noise Voltage: 14nV/√Hz
Settling Time to 0.1%, 10V Step: 700ns
Settling Time to 0.01%, 10V Step: 1.25µs
Minimum Output Swing into 1k:
±13V
Minimum Output Swing into 500Ω:
±3.4V
Specified at
±2.5V, ±5V
and
±15V
APPLICATIONS
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Battery-Powered Systems
Wideband Amplifiers
Buffers
Active Filters
Data Acquisition Systems
Photodiode Amplifiers
TYPICAL APPLICATION
Instrumentation Amplifier
R1
50k
R2
5k
R5
1.1k
R3
5k
R4
50k
Large-Signal Response
–
LT1351
–
LT1351
V
OUT
–
V
IN
+
+
+
GAIN = [R4/R3][1 + (1/2)(R2/R1 + R3/R4) + (R2 + R3)/R5] = 102
TRIM R5 FOR GAIN
TRIM R1 FOR COMMON MODE REJECTION
BW = 30kHz
1351 TA01
A
V
= –1
U
U
U
1351 TA02
1
LT1351
ABSOLUTE
MAXIMUM
RATINGS
Total Supply Voltage (V
+
to V
–
) .............................. 36V
Differential Input Voltage (Transient Only, Note 1) ...
±10V
Input Voltage ..........................................................
±V
S
Output Short-Circuit Duration (Note 2) ........... Indefinite
Operating Temperature Range ................ – 40°C to 85°C
Specified Temperature Range (Note 6) .....– 40°C to 85°C
Maximum Junction Temperature (See Below)
Plastic Package ................................................ 150°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
NULL
–IN
+IN
V
–
1
2
3
4
8
7
6
5
NULL
V
+
V
OUT
SHDN
ORDER PART
NUMBER
LT1351CMS8
MS8 PART MARKING
LTBT
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 250°C/ W
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
T
A
= 25°C, V
CM
= 0V unless otherwise noted.
V
SUPPLY
±15V
±5V
±2.5V
±2.5V
to
±15V
±2.5V
to
±15V
MIN
TYP
0.2
0.2
0.3
5
20
14
0.5
300
600
20
3
12.0
2.5
0.5
13.5
3.5
1.0
– 13.5
– 3.5
– 1.0
80
78
68
90
94
86
77
106
– 12.0
– 2.5
– 0.5
MAX
0.6
0.6
0.8
15
50
UNITS
mV
mV
mV
nA
nA
nV/√Hz
pA/√Hz
MΩ
MΩ
pF
V
V
V
V
V
V
dB
dB
dB
dB
CONDITIONS
I
OS
I
B
e
n
i
n
R
IN
C
IN
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Current
Input Resistance
Input Capacitance
Positive Input Voltage Range
f = 10kHz
f = 10kHz
V
CM
=
±12V
Differential
Negative Input Voltage Range
CMRR
Common Mode Rejection Ratio
V
CM
=
±12V
V
CM
=
±2.5V
V
CM
=
±0.5V
V
S
=
±2.5V
to
±15V
PSRR
Power Supply Rejection Ratio
2
U
U
W
W W
U
W
TOP VIEW
NULL 1
– IN 2
+IN 3
V
–
4
N8 PACKAGE
8-LEAD PDIP
8
7
6
5
NULL
V
+
V
OUT
SHDN
ORDER PART
NUMBER
LT1351CN8
LT1351CS8
S8 PART MARKING
1351
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 130°C/ W (N8)
T
JMAX
= 150°C,
θ
JA
= 190°C/ W (S)
±2.5V
to
±15V
±2.5V
to
±15V
±15V
±15V
±15V
±15V
±5V
±2.5V
±15V
±5V
±2.5V
±15V
±5V
±2.5V
LT1351
ELECTRICAL CHARACTERISTICS
SYMBOL
A
VOL
PARAMETER
Large-Signal Voltage Gain
T
A
= 25°C, V
CM
= 0V unless otherwise noted.
V
SUPPLY
±15V
±15V
±15V
±5V
±5V
±5V
±2.5V
±15V
±15V
±15V
±5V
±5V
±2.5V
±15V
±5V
±15V
±15V
±5V
±15V
±5V
±15V
±
5V
±
2.5V
±15V
±5V
±15V
±5V
±15V
±5V
±15V
±15V
±5V
±5V
±15V
±15V
±15V
±15V
±5V
±5V
2.0
1.8
MIN
40
30
20
30
25
15
20
13.5
13.4
13.0
3.5
3.4
1.3
13.0
6.8
30
120
30
TYP
80
60
40
60
50
30
40
14.0
13.8
13.4
4.0
3.8
1.7
13.4
7.6
45
200
50
3.2
2.6
3.0
2.7
2.5
46
53
13
16
41
52
700
1250
950
1400
1.5
– 10
0.1
250
220
10
2
330
300
MAX
UNITS
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
±V
±V
±V
±V
±V
±V
mA
mA
mA
V/µs
V/µs
MHz
MHz
MHz
MHz
MHz
ns
ns
%
%
ns
ns
ns
ns
ns
ns
Ω
µA
µA
µA
µA
µA
CONDITIONS
V
OUT
=
±12V,
R
L
= 5k
V
OUT
=
±10V,
R
L
= 2k
V
OUT
=
±10V,
R
L
= 1k
V
OUT
=
±2.5V,
R
L
= 5k
V
OUT
=
±2
.5V, R
L
= 2k
V
OUT
=
±2.5V,
R
L
= 1k
V
OUT
=
±1V,
R
L
= 5k
R
L
= 5k, V
IN
=
±10mV
R
L
= 2k, V
IN
=
±10mV
R
L
= 1k, V
IN
=
±10mV
R
L
= 1k, V
IN
=
±10mV
R
L
= 500Ω, V
IN
=
±10mV
R
L
= 5k, V
IN
=
±10mV
V
OUT
=
±13V
V
OUT
=
±3.4V
V
OUT
= 0V, V
IN
=
±3V
A
V
= – 1, R
L
= 5k (Note 3)
10V Peak (Note 4)
3V Peak (Note 4)
f = 200kHz, R
L
= 10k
V
OUT
Output Swing
I
OUT
I
SC
SR
Output Current
Short-Circuit Current
Slew Rate
Full-Power Bandwidth
GBW
Gain Bandwidth
t
r
, t
f
Rise Time, Fall Time
Overshoot
Propagation Delay
A
V
= 1, 10% to 90%, 0.1V
A
V
= 1, 0.1V
50% V
IN
to 50% V
OUT
, 0.1V
10V Step, 0.1%, A
V
= – 1
10V Step, 0.01%, A
V
= – 1
5V Step, 0.1%, A
V
= – 1
5V Step, 0.01%, A
V
= – 1
A
V
= 1, f = 20kHz
SHDN = V
EE
+ 0.1V
SHDN = V
CC
t
s
Settling Time
R
O
I
SHDN
I
S
Output Resistance
Shutdown Input Current
Supply Current
SHDN = V
EE
+ 0.1V
0°C
≤
T
A
≤
70°C, V
CM
= 0V unless otherwise noted.
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
CONDITIONS
V
SUPPLY
±15V
±5V
±2.5V
(Note 5)
±2.5V
to
±15V
±2.5V
to
±15V
±2.5V
to
±15V
3
MIN
TYP
MAX
0.8
0.8
1.0
8
20
75
UNITS
mV
mV
mV
µV/°C
nA
nA
Input V
OS
Drift
I
OS
I
B
Input Offset Current
Input Bias Current
3
LT1351
ELECTRICAL CHARACTERISTICS
SYMBOL
CMRR
PARAMETER
Common Mode Rejection Ratio
0°C
≤
T
A
≤
70°C, V
CM
= 0V unless otherwise noted.
V
SUPPLY
±15V
±5V
±2.5V
±15V
±15V
±5V
±5V
±5V
±2.5V
±15V
±15V
±15V
±5V
±5V
±2.5V
±15V
±5V
±15V
±15V
±5V
±15V
±
5V
±15V
±15V
±15V
±5V
±5V
MIN
78
77
67
89
25
20
20
15
10
15
13.4
13.3
12.0
3.4
3.3
1.2
12.0
6.6
24
100
21
1.8
1.6
– 20
3
380
355
20
TYP
MAX
UNITS
dB
dB
dB
dB
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
±V
±V
±V
±V
±V
±V
mA
mA
mA
V/µs
V/µs
MHz
MHz
µA
µA
µA
µA
µA
CONDITIONS
V
CM
=
±12V
V
CM
=
±2.5V
V
CM
=
±0.5V
V
S
=
±2.5V
to
±15V
V
OUT
=
±12V,
R
L
= 5k
V
OUT
=
±10V,
R
L
= 2k
V
OUT
=
±2.5V,
R
L
= 5k
V
OUT
=
±2
.5V, R
L
= 2k
V
OUT
=
±2.5V,
R
L
= 1k
V
OUT
=
±1V,
R
L
= 5k
R
L
= 5k, V
IN
=
±10mV
R
L
= 2k, V
IN
=
±10mV
R
L
= 1k, V
IN
=
±10mV
R
L
= 1k, V
IN
=
±10mV
R
L
= 500Ω, V
IN
=
±10mV
R
L
= 5k, V
IN
=
±10mV
V
OUT
=
±12V
V
OUT
=
±3.3V
V
OUT
= 0V, V
IN
=
±3V
A
V
= – 1, R
L
= 5k (Note 3)
f = 200kHz, R
L
= 10k
SHDN = V
EE
+ 0.1V
SHDN = V
CC
PSRR
A
VOL
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
OUT
Output Swing
I
OUT
I
SC
SR
GBW
I
SHDN
I
S
Output Current
Short-Circuit Current
Slew Rate
Gain Bandwidth
Shutdown Input Current
Supply Current
SHDN = V
EE
+ 0.1V
– 40°C
≤
T
A
≤
85°C, V
CM
= 0V unless otherwise noted (Note 6).
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
CONDITIONS
V
SUPPLY
±15V
±5V
±2.5V
(Note 5)
±2.5V
to
±15V
±2.5V
to
±15V
±2.5V
to
±15V
V
CM
=
±12V
V
CM
=
±2.5V
V
CM
=
±0.5V
V
S
=
±2.5V
to
±15V
V
OUT
=
±12V,
R
L
= 5k
V
OUT
=
±10V,
R
L
= 2k
V
OUT
=
±2.5V,
R
L
= 5k
V
OUT
=
±2
.5V, R
L
= 2k
V
OUT
=
±2.5V,
R
L
= 1k
V
OUT
=
±1V,
R
L
= 5k
±15V
±15V
±5V
±5V
±5V
±2.5V
±15V
±5V
±2.5V
76
76
66
87
20
15
15
10
8
10
3
MIN
TYP
MAX
1.0
1.0
1.2
8
30
100
UNITS
mV
mV
mV
µV/°C
nA
nA
dB
dB
dB
dB
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
Input V
OS
Drift
I
OS
I
B
CMRR
Input Offset Current
Input Bias Current
Common Mode Rejection Ratio
PSRR
A
VOL
Power Supply Rejection Ratio
Large-Signal Voltage Gain
4
LT1351
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OUT
PARAMETER
Output Swing
– 40°C
≤
T
A
≤
85°C, V
CM
= 0V unless otherwise noted (Note 6).
V
SUPPLY
±15V
±15V
±15V
±5V
±5V
±2.5V
±15V
±5V
±15V
±15V
±5V
±15V
±
5V
±15V
±15V
±15V
±5V
±5V
MIN
13.3
13.2
10.0
3.3
3.2
1.1
10.0
6.4
20
50
15
1.6
1.4
– 30
5
390
380
30
TYP
MAX
UNITS
±V
±V
±V
±V
±V
±V
mA
mA
mA
V/µs
V/µs
MHz
MHz
µA
µA
µA
µA
µA
CONDITIONS
R
L
= 5k, V
IN
=
±10mV
R
L
= 2k, V
IN
=
±10mV
R
L
= 1k, V
IN
=
±10mV
R
L
= 1k, V
IN
=
±10mV
R
L
= 500Ω, V
IN
=
±10mV
R
L
= 5k, V
IN
=
±10mV
V
OUT
=
±10V
V
OUT
=
±3.2V
V
OUT
= 0V, V
IN
=
±3V
A
V
= – 1, R
L
= 5k (Note 3)
f = 200kHz, R
L
= 10k
SHDN = V
EE
+ 0.1V
SHDN = V
CC
I
OUT
I
SC
SR
GBW
I
SHDN
I
S
Output Current
Short-Circuit Current
Slew Rate
Gain Bandwidth
Shutdown Input Current
Supply Current
SHDN = V
EE
+ 0.1V
Note 1:
Differential inputs of
±10V
are appropriate for transient operation
only, such as during slewing. Large, sustained differential inputs will cause
excessive power dissipation and may damage the part. See Input
Considerations in the Applications Information section of this data sheet
for more details.
Note 2:
A heat sink may be required to keep the junction temperature
below absolute maximum when the output is shorted indefinitely.
Note 3:
Slew rate is measured between
±8V
on the output with
±12V
input for
±15V
supplies and
±2V
on the output with
±3V
input for
±5V
supplies.
Note 4:
Full-power bandwidth is calculated from the slew rate
measurement: FPBW = (Slew Rate)/2πV
P
.
Note 5:
This parameter is not 100% tested.
Note 6:
The LT1351 is designed, characterized and expected to meet these
extended temperature limits, but is not tested at – 40°C and at 85°C.
Guaranteed I grade parts are available; consult factory.
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Supply Voltage
and Temperature
350
COMMON MODE RANGE (V)
INPUT BIAS CURRENT (nA)
300
SUPPLY CURRENT (µA)
125°C
250
25°C
200
– 55°C
150
100
0
10
5
15
SUPPLY VOLTAGE (± V)
U W
1351 G01
Input Common Mode Range
vs Supply Voltage
V
+
–0.5
–1.0
–1.5
–2.0
T
A
= 25°C
∆V
OS
= 1mV
20
30
Input Bias Current
vs Input Common Mode Voltage
T
A
= 25°C
V
S
=
±15V
I
B
=
I
B+
+ I
B–
2
10
2.0
1.5
1.0
0.5
V
–
0
–10
20
0
15
10
5
SUPPLY VOLTAGE (± V)
20
1351 G02
–20
–15
10
–5
0
5
–10
INPUT COMMON MODE VOLTAGE (V)
15
1351 G03
5
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