1

LTC1047

1047fa

■

No External Components Required

■

Maximum Offset Voltage: 10

■

Maximum Offset Voltage Drift: 50nV/

■

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

The LTC

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

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.

Micropower Single Supply Instrumentation Amplifier

Dual Micropower

Zero-Drift Operational Amplifier

with Internal Capacitors

CMRR vs Frequency

■

Thermocouple Amplifiers

■

Electronic Scales

■

Battery Powered Instrumentation

■

Strain Gauge Amplifiers

■

Remote Located Sensors

LT1047 • TA02

FREQUENCY OF COMMON MODE SIGNAL

100

20

100

120

140

1k

10k

100k

80

60

40

18

4

6

16

2

3

17

5

15

100Ω

1/2 LTC1043

100k

5V

5V

–IN

+IN

7

4

6

1µF

1µF

0.1µF

5

–

+

1/2

LTC1047

GAIN = 1000

CMRR > = 120dB AT 60Hz

LTC1047 • TA01

FEATURES

APPLICATIO S

DESCRIPTIO

TYPICAL APPLICATIO

, LTC and LT are registered trademarks of Linear Technology Corporation.