Dual Micropower Zero-Drift Operational Amplifier with Internal Capacitors

The LTC1047 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 3.5µVP-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. Overload 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.

Applications

* Thermocouple Amplifiers

* Electronic Scales

* Battery Powered Instrumentation

* Strain Gauge Amplifiers

* Remote Located Sensors

* No External Components Required

* Maximum Offset Voltage: 10µV

* Maximum Offset Voltage Drift: 50nV/°C

* Supply Current: 80µA

* Minimum CMRR: 110dB

* Minimum PSRR 110dB

* 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