LT1057/LT1058
Dual and Quad, JFET Input
Precision High Speed Op Amps
FEATURES
DESCRIPTION
14V/µs Slew Rate: 10V/µs Min
n 5MHz Gain-Bandwidth Product
n Fast Settling Time: 1.3µs to 0.02%
n 150µV Offset Voltage (LT1057): 450µV Max
n 180µV Offset Voltage (LT1058): 600µV Max
n 2µV/°C V
OS Drift: 7µV/°C Max
n 50pA Bias Current at 70°C
n Low Voltage Noise:
13nV/√Hz at 1kHz
26nV/√Hz at 10Hz
The LT®1057 is a matched JFET input dual op amp in
the industry standard 8-pin configuration, featuring a
combination of outstanding high speed and precision
specifications. It replaces all the popular bipolar and JFET
input dual op amps. In particular, the LT1057 upgrades the
performance of systems using the LF412A and OP-215
JFET input duals.
n
The LT1058 is the lowest offset quad JFET input operational
amplifier in the standard 14-pin configuration. It offers
significant accuracy improvement over presently available
JFET input quad operational amplifiers. The LT1058 can
replace four single precision JFET input op amps, while
saving board space, power dissipation and cost.
APPLICATIONS
n
n
n
n
n
n
n
Precision, High Speed Instrumentation
Fast, Precision Sample-and-Hold
Logarithmic Amplifiers
D/A Output Amplifiers
Photodiode Amplifiers
Voltage-to-Frequency Converters
Frequency-to-Voltage Converters
Both the LT1057 and LT1058 are available in the plastic
PDIP package and the surface mount SO package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Current Output, High Speed, High Input Impedance
Instrumentation Amplifier
3
2
+
1/4
LT1058
25
1
–
7.5k
4.7k
7.5k
6
9.1k
5
500Ω*
13
V1
12
–
1/4
LT1058
14
IOUT = 2(V1 – V2)
RX
4.7k
7.5k
+
–
1/4
LT1058
7
RX
IOUT
+
8
1/4
LT1058
+
10
–
VS = ±15V
TA = 25°C
20
PERCENT OF UNITS
V2
Distribution of Offset Voltage
(All Packages, LT1057 and LT1058)
LT1057: 610 OP AMPS
LT1058: 520 OP AMPS
1130 OP AMPS
TESTED
15
10
9
5
6.8k
0
–1.0
1k**
–0.6
0.6
–0.2 0 0.2
INPUT OFFSET VOLTAGE (mV)
1.0
10578 TA01b
*GAIN ADJUST
**COMMON MODE REJECTION ADJUST
BANDWIDTH ≈ 2MHz
10578 TA01
10578fd
1
