LT1357
25MHz, 600V/µs Op Amp
FEATURES
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DESCRIPTION
The LT
®
1357 is a high speed, very high slew rate opera-
tional amplifier with outstanding AC and DC performance.
The LT1357 has much lower supply current, lower input
offset voltage, lower input bias current, and higher DC gain
than devices with comparable bandwidth. The circuit
topology is a voltage feedback amplifier with the
slewing characteristics of a current feedback amplifier.
The amplifier is a single gain stage with outstanding
settling characteristics which makes the circuit an ideal
choice for data acquisition systems. The output drives a
500Ω load to
±12V
with
±15V
supplies and a 150Ω
load to
±2.5V
on
±5V
supplies. The amplifier is also
stable with any capacitive load which makes it useful in
buffer or cable driver applications.
The LT1357 is a member of a family of fast, high perfor-
mance amplifiers using this unique topology and employ-
ing Linear Technology Corporation’s advanced bipolar
complementary processing. For dual and quad amplifier
versions of the LT1357 see the LT1358/LT1359 data
sheet. For higher bandwidth devices with higher supply
current see the LT1360 through LT1365 data sheets. For
lower supply current amplifiers see the LT1354 and LT1355/
LT1356 data sheets. Singles, duals, and quads of each
amplifier are available.
25MHz Gain Bandwidth
600V/µs Slew Rate
2.5mA Maximum Supply Current
Unity-Gain Stable
C-Load
TM
Op Amp Drives All Capacitive Loads
8nV/√Hz Input Noise Voltage
600µV Maximum Input Offset Voltage
500nA Maximum Input Bias Current
120nA Maximum Input Offset Current
20V/mV Minimum DC Gain, R
L
=1k
115ns Settling Time to 0.1%, 10V Step
220ns Settling Time to 0.01%, 10V Step
±12V
Minimum Output Swing into 500Ω
±2.5V
Minimum Output Swing into 150Ω
Specified at
±2.5V, ±5V,
and
±15V
APPLICATIONS
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Wideband Amplifiers
Buffers
Active Filters
Data Acquisition Systems
Photodiode Amplifiers
, LTC and LT are registered trademarks of Linear Technology Corporation.
C-Load is a trademark of Linear Technology Corporation
TYPICAL APPLICATION
DAC I-to-V Converter
A
V
= –1 Large-Signal Response
6pF
DAC
INPUTS
12
5k
–
565A-TYPE
LT1357
V
OUT
+
0.1µF
5k
V
V
OS
+
I
OS
5k
Ω +
OUT
<
1LSB
A
VOL
1357 TA01
( )
U
U
U
1357 TA02
1
LT1357
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
NC
ORDER PART
NUMBER
LT1357CN8
N8 PACKAGE, 8-LEAD PLASTIC DIP
T
JMAX
= 150°C,
θ
JA
= 130°C/ W
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
CONDITIONS
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
40
120
8
0.8
35
80
6
3
12.0
2.5
0.5
13.4
3.5
1.1
–13.2 –12.0
– 3.3 – 2.5
– 0.9 – 0.5
80
78
68
92
±15V
±15V
±5V
±5V
±5V
±2.5V
20.0
7.0
20.0
7.0
1.5
7.0
97
84
75
106
65
25
45
25
6
30
MAX
0.6
0.6
0.8
120
500
UNITS
mV
mV
mV
nA
nA
nV/√Hz
pA/√Hz
MΩ
MΩ
pF
V
V
V
V
V
V
dB
dB
dB
dB
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
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
Input Voltage Range
+
f = 10kHz
f = 10kHz
V
CM
=
±12V
Differential
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
V
OUT
=
±12V,
R
L
= 1k
V
OUT
=
±10V,
R
L
= 500Ω
V
OUT
=
±2.5V,
R
L
= 1k
V
OUT
=
±2.5V,
R
L
= 500Ω
V
OUT
=
±2.5V,
R
L
= 150Ω
V
OUT
=
±1V,
R
L
= 500Ω
PSRR
A
VOL
Power Supply Rejection Ratio
Large-Signal Voltage Gain
2
U
U
W
W W
U
W
TOP VIEW
NULL
–IN
+IN
V
–
1
2
3
4
8
7
6
5
NULL
V
+
V
OUT
NC
ORDER PART
NUMBER
LT1357CS8
S8 PART MARKING
1357
S8 PACKAGE, 8-LEAD PLASTIC SOIC
T
JMAX
= 150°C,
θ
JA
= 190°C/ W
±2.5V
to
±15V
±2.5V
to
±15V
±15V
±15V
±15V
±15V
±5V
±2.5V
±15V
±5V
±2.5V
±15V
±5V
±2.5V
LT1357
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OUT
PARAMETER
Output Swing
CONDITIONS
T
A
= 25°C, V
CM
= 0V unless otherwise noted.
V
SUPPLY
±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
±5V
±15V
±5V
±15V
±15V
±5V
18
15
MIN
13.3
12.0
3.5
2.5
1.3
24.0
16.7
30
300
150
TYP
13.8
12.8
4.0
3.3
1.7
30
25
42
600
220
9.6
11.7
25
22
20
8
9
27
27
9
11
115
220
110
380
0.1
0.1
0.50
0.35
0.3
2.0
1.9
2.5
2.4
MAX
UNITS
±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
%
%
Deg
Deg
Ω
mA
mA
R
L
= 1k, V
IN
=
±40mV
R
L
= 500Ω, V
IN
=
±40mV
R
L
= 500Ω, V
IN
=
±40mV
R
L
= 150Ω, V
IN
=
±40mV
R
L
= 500Ω, V
IN
=
±40mV
V
OUT
=
±12V
V
OUT
=
±2.5V
V
OUT
= 0V, V
IN
=
±3V
A
V
= –2, (Note 3)
10V Peak, (Note 4)
3V Peak, (Note 4)
f = 200kHz, R
L
= 2k
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%-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
f = 3.58MHz, A
V
= 2, R
L
= 1k
f = 3.58MHz, A
V
= 2, R
L
= 1k
A
V
= 1, f = 100kHz
t
s
Settling Time
Differential Gain
Differential Phase
R
O
I
S
Output Resistance
Supply Current
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
V
CM
=
±12V
V
CM
=
±2.5V
V
CM
=
±0.5V
V
S
=
±2.5V
to
±15V
V
OUT
=
±12V,
R
L
= 1k
V
OUT
=
±10V,
R
L
= 500Ω
V
OUT
=
±2.5V,
R
L
= 1k
V
OUT
=
±2.5V,
R
L
= 500Ω
V
OUT
=
±2.5V,
R
L
= 150Ω
V
OUT
=
±1V,
R
L
= 500Ω
±15V
±15V
±5V
±5V
±5V
±2.5V
±15V
±5V
±2.5V
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
MIN
TYP
MAX
0.8
0.8
1.0
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
5
8
180
750
79
77
67
90
15
5
15
5
1
5
PSRR
A
VOL
Power Supply Rejection Ratio
Large-Signal Voltage Gain
3
LT1357
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OUT
PARAMETER
Output Swing
CONDITIONS
0°C
≤
T
A
≤
70°C, V
CM
= 0V unless otherwise noted.
V
SUPPLY
±15V
±15V
±5V
±5V
±2.5V
±15V
±5V
±15V
±15V
±5V
±15V
±5V
±15V
±5V
q
q
q
q
q
q
q
q
q
q
q
q
q
q
MIN
13.2
11.5
3.4
2.3
1.2
23.0
15.3
25
225
125
15
12
TYP
MAX
UNITS
±V
±V
±V
±V
±V
mA
mA
mA
V/µs
V/µs
MHz
MHz
R
L
= 1k, V
IN
=
±40mV
R
L
= 500Ω, V
IN
=
±40mV
R
L
= 500Ω, V
IN
=
±40mV
R
L
= 150Ω, V
IN
=
±40mV
R
L
= 500Ω, V
IN
=
±40mV
V
OUT
=
±11.5V
V
OUT
=
±2.3V
V
OUT
= 0V, V
IN
=
±3V
A
V
= –2, (Note 3)
f = 200kHz,R
L
= 2k
I
OUT
I
SC
SR
GBW
I
S
Output Current
Short-Circuit Current
Slew Rate
Gain-Bandwidth
Supply Current
2.9
2.8
mA
mA
–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
±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
= 1k
V
OUT
=
±10V,
R
L
= 500Ω
V
OUT
=
±2.5V,
R
L
= 1k
V
OUT
=
±2.5V,
R
L
= 500Ω
V
OUT
=
±2.5V,
R
L
= 150Ω
V
OUT
=
±1V,
R
L
= 500Ω
R
L
= 1k, V
IN
=
±40mV
R
L
= 500Ω, V
IN
=
±40mV
R
L
= 500Ω, V
IN
=
±40mV
R
L
= 150Ω, V
IN
=
±40mV
R
L
= 500Ω, V
IN
=
±40mV
V
OUT
=
±11V
V
OUT
=
±2.1V
V
OUT
= 0V, V
IN
=
±3V
A
V
= –2, (Note 3)
f = 200kHz, R
L
= 2k
±15V
±15V
±5V
±5V
±5V
±2.5V
±15V
±15V
±5V
±5V
±2.5V
±15V
±5V
±15V
±15V
±5V
±15V
±5V
±15V
±5V
±15V
±5V
±2.5V
MIN
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
TYP
MAX
1.3
1.3
1.5
8
300
900
UNITS
mV
mV
mV
µV/°C
nA
nA
dB
dB
dB
dB
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
±V
±V
±V
±V
±V
mA
mA
mA
V/µs
V/µs
MHz
MHz
Input V
OS
Drift
I
OS
I
B
CMRR
Input Offset Current
Input Bias Current
Common Mode Rejection Ratio
(Note 5)
5
78
76
66
90
10.0
2.5
10.0
2.5
0.6
2.5
13.0
11.0
3.4
2.1
1.2
22
14
24
180
100
14
11
3.0
2.9
PSRR
A
VOL
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
OUT
Output Swing
I
OUT
I
SC
SR
GBW
I
S
Output Current
Short-Circuit Current
Slew Rate
Gain-Bandwith
Supply Current
mA
mA
4
LT1357
ELECTRICAL CHARACTERISTICS
The
q
denotes specifications that apply over the full specified temperature
range.
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
±10V
on the output with
±6V
input
for
±15V
supplies and
±1V
on the output with
±1.75V
input for
±5V
supplies.
Note 4:
Full power bandwidth is calculated from the slew rate
measurement: FPBW = SR/2πV
P
.
Note 5:
This parameter is not 100% tested.
Note 6:
The LT1357 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
3.0
125°C
2.0
25°C
–55°C
1.5
COMMON-MODE RANGE (V)
–1.5
–2.0
INPUT BIAS CURRENT (nA)
2.5
SUPPLY CURRENT (mA)
1.0
0.5
0
5
10
15
SUPPLY VOLTAGE (±V)
20
1357
G01
Input Bias Current vs
Temperature
450
400
INPUT BIAS CURRENT (nA)
INPUT VOLTAGE NOISE (nV/√Hz)
350
300
250
200
150
100
50
0
–50
V
S
=
±15V
I
B
+ + I
B
–
I
B
= ————
2
OPEN-LOOP GAIN (dB)
–25
0
25
50
75
TEMPERATURE (°C)
U W
100
1358/1359 G04
Input Common-Mode Range vs
Supply Voltage
V
+
–0.5
–1.0
T
A
= 25°C
∆V
OS
< 1mV
400
300
200
100
0
Input Bias Current vs
Input Common-Mode Voltage
V
S
=
±15V
T
A
= 25°C
I
B
+ + I
B
–
I
B
= ————
2
2.0
1.5
1.0
0.5
V
–
0
5
10
15
SUPPLY VOLTAGE (±V)
20
1357
G02
–100
–200
–15
–10
–5
0
5
10
INPUT COMMON-MODE VOLTAGE (V)
15
1357
G03
Input Noise Spectral Density
100
V
S
=
±15V
T
A
= 25°C
A
V
= 101
R
S
= 100k
e
n
10
i
n
1
10
INPUT CURRENT NOISE (pA/√Hz)
Open-Loop Gain vs
Resistive Load
100
T
A
= 25°C
90
V
S
=
±15V
V
S
=
±5V
80
70
60
1
125
10
100
1k
10k
FREQUENCY (Hz)
0.1
100k
1357
G05
50
10
100
1k
LOAD RESISTANCE (Ω)
10k
1357
G06
5
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