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Linear Technology Electronic Components Datasheet

LT1457 Datasheet

Dual/ Precision JFET Input Op Amp

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LT1457
Dual, Precision
JFET Input Op Amp
FEATURES
s Handles 10,000pF Capacitive Load
s 450µV Max Offset Voltage
s 1200µV Max Offset Voltage in S8 Package
s 50pA Bias Current at 70°C
s 13nV/Hz Voltage Noise
s 4V/µs Slew Rate
s 4µV/°C Drift
s 130dB Channel Separation
U
APPLICATIONS
s Sample-and-Hold (Drives Large Hold Capacitors)
s A/D and D/A Converters
s Photodiode Amplifiers
s Voltage-to-Frequency Converters
DESCRIPTION
The LT1457 is a dual, JFET input op amp optimized for
handling large capacitive loads in combination with preci-
sion performance.
Precision specifications include 220µV offset voltage in
plastic and surface mount packages. At 70°C input bias
current is 50pA, input offset current is 20pA. Channel
separation is 130dB.
Other dual JFET input op amps from Linear Technology
include the LT1057, which is three times faster than the
LT1457 but at the expense of significantly lower capacitive
load handling capability; and the LT1113 with 4.5nV/Hz
voltage noise.
TYPICAL PERFORMANCE CHARACTERISTICS
Capacitive Load Handling
100
VS = ±15V
TA = 25°C
80 AV = +1
60
40
20
0
0.1 1 10 100
CAPACITIVE LOAD (nF)
LT11457• TA01
Input Offset Voltage Distribution
S8 Package
21
VS = ±15V
18 TA = 25°C
15
400 DUALS
(800 OP AMPS)
TESTED FROM
3 RUNS
12
9
6
3
0
–1.0–0.8 –0.6–0.4 –0.2 0 0.2 0.4 0.6 0.8 1.0
INPUT OFFSET VOLTAGE (mV)
LT1457 • TA02
1


Linear Technology Electronic Components Datasheet

LT1457 Datasheet

Dual/ Precision JFET Input Op Amp

No Preview Available !

LT1457
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ...................................................... ±20V
Differential Input Voltage ....................................... ±40V
Input Voltage .......................... Equal to Supply Voltages
Output Short-Circuit Duration .......................... Indefinite
Operating Temperature Range ................ – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
OUT A 1
–IN A 2
+IN A 3
V4
TOP VIEW
A
B
8 V+
7 OUT B
6 –IN B
5 +IN B
ORDER PART
NUMBER
LT1457ACN8
LT1457CN8
N8 PACKAGE
8-LEAD PLASTIC DIP
TJMAX = 115°C, θJA = 130°C/ W
TOP VIEW
+IN A 1
V2
+IN B 3
–IN B 4
A
B
8 –IN A
7 OUT A
6 V+
5 OUT B
S8 PACKAGE
8-LEAD PLASTIC SOIC
NOTE: THIS PIN CONFIGURATION DIFFERS FROM
THE 8-LEAD DIP PIN LOCATIONS. INSTEAD, IT
FOLLOWS THE INDUSTRY STANDARD LT1013DS8
SO PACKAGE CONFIGURATION.
TJMAX = 130°C, θJA = 190°C/ W
LT1457S8
S8 PART MARKING
1457
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS VS = ±15V, TA = 25°C,VCM = 0V unless otherwise noted. (Note 1)
SYMBOL PARAMETER
VOS Input Offset Voltage
IOS Input Offset Current
IB Input Bias Current
Input Resistance-Differential
-Common-Mode
Input Capacitance
en Input Noise Voltage
en Input Noise Voltage Density
in Input Noise Current Density
AVOL Large-Signal Voltage Gain
Input Voltage Range
CMRR
PSRR
VOUT
SR
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Output Voltage Swing
Slew Rate
CONDITIONS
LT1457AC/C
LT1457S8
Fully Warmed Up
Fully Warmed Up
VCM = –11V to 8V
VCM = 8V to 11V
0.1Hz to 10Hz
fO = 10Hz
fO = 1kHz (Note 2)
fO = 10Hz, 1kHz (Note 3)
VO = ±10V, RL = 2k
VO = ±10V, RL = 1k
VCM = ±10.5V
VS = ±4.5V to ±18V
RL = 2k
LT1457AC
MIN TYP MAX
150 450
3
±5
1012
1012
1011
4
2.0
26
13
1.5
150 350
120 250
±10.5 14.3
–11.5
86 100
88 103
±12 ±13
24
40
±50
22
4
LT1457C/LT1457S8
MIN TYP MAX
200 800
220 1200
4 50
±7 ±75
1012
1012
1011
4
2.1
28
14 24
1.8 6
100 300
80 220
±10.5 14.3
–11.5
82 98
86 102
±12 ±13
24
UNITS
µV
µV
pA
pA
pF
µVP–P
nV/Hz
nV/Hz
fA/Hz
V/mV
V/mV
V
V
dB
dB
V
V/µs
2


Part Number LT1457
Description Dual/ Precision JFET Input Op Amp
Maker Linear Technology
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LT1457 Datasheet PDF






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