LTC1047_09 Datasheet, PDF (1/12 Pages) Linear Technology – Dual Micropower Zero-Drift Operational Amplifier with Internal Capacitors

FEATURES
■ _{No External Components Required}
■ _{Maximum Offset Voltage: 10µV}
■ _{Maximum Offset Voltage Drift: 50nV/°C}
■ _{Supply Current: 80µA}
■ _{Minimum CMRR: 110dB}
■ _{Minimum PSRR: 105dB}
■ _{Single Supply Operation: 4.75V to 16V}
■ _{Common Mode Range Includes GND}
■ _{Output Swings to GND}
■ _{Typical Overload Recovery Time: 70ms}
■ _{Pin Compatible with Industry Standard Dual}
Op Amps
U
APPLICATIO S
■ _{Thermocouple Amplifiers}
■ _{Electronic Scales}
■ _{Battery Powered Instrumentation}
■ _{Strain Gauge Amplifiers}
■ _{Remote Located Sensors}
LTC1047
Dual Micropower
Zero-Drift Operational Amplifier
with Internal Capacitors
DESCRIPTIO
The LTC^®1047 is a micropower, high performance
dual zero-drift operational amplifier. The sample-and-hold
capacitors usually required by other chopper amplifiers
are integrated on-chip, minimizing the need for external
components.
The LTC1047 has a typical offset voltage of 3µV, drift
of 10nV/°C, input noise voltage typically 3.5µV_P-P,
and typical voltage gain of 150dB. The common mode
rejection is 110dB minimum, with minimum power supply
rejection of 105dB. The LTC1047 also offers a 0.2V/µs
slew rate and a gain bandwidth product of 200kHz. Over-
load recovery time from saturation is 70ms, four times
faster than chopper amplifiers with external capacitors.
The LTC1047 is available in a standard plastic 8-pin PDIP
as well as a 16-pin SW package. The LTC1047 is a plug-in
replacement for most dual op amps with improved DC
performance and substantial power savings.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Micropower Single Supply Instrumentation Amplifier
5V
4
1/2 LTC1043
100Ω
100k
–IN 18
15
+IN 6
3
C_S
1µF
2
5
5V
C_H
1µF
6_–
1/2
5
LTC1047
+₄
16
17
0.1µF
GAIN = 1000
CMRR > = 120dB AT 60Hz
V_OS = < 10µV
I_S = 62µA (INCLUDING THE LTC1043)
7
V_OUT
LTC1047 • TA01
CMRR vs Frequency
140
C_S = C_H = 1µF
120
100
80
60
40
20
100
1k
10k
100k
FREQUENCY OF COMMON MODE SIGNAL
LT1047 • TA02
1047fa
1