LT1457_15 Datasheet, PDF (1/8 Pages) Linear Technology – Dual, Precision JFET Input Op Amp

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
V_S = ±15V
T_A = 25°C
80 A_V = +1
60
40
20
0
0.1
1
10
100
CAPACITIVE LOAD (nF)
LT11457• TA01
Input Offset Voltage Distribution
S8 Package
21
V_S = ±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