36 V, Low Noise, Zero Drift Op Amp

The ADA4523-1 is a high voltage, low noise, zero drift op amp that offers precision dc performance over a wide supply range of 4.5 V to 36 V. Offset voltage and 1/f noise are suppressed, allowing this op amp to achieve a maximum offset voltage of ±4 µV and a 0.1 Hz to 10 Hz input noise voltage of 88 nV p-p typical.The self calibrating circuitry of the ADA4523-1 results in low offset voltage drift with temperature (0.01 µV/°C maximum) and zero drift over time. Additionally, the ADA4523-1 uses on-chip filtering to achieve high immunity to electromagnetic interference (EMI).

Wide supply range, combined with low noise, low offset, 168 dB power supply rejection ratio (PSRR), and 160 dB common-mode rejection ratio (CMRR), make the ADA4523-1 well suited for high dynamic range test, measurement, and instrumentation systems.

Applications

* High resolution data acquisition

* Reference buffering

* Test and measurement

* Electronic scales

* Thermocouple amplifiers

* Strain gages

* Low-side current sense

* Supply voltage range: 4.5 V to 36 V

* Offset voltage: ±4 µV maximum at 5 V

* Offset voltage drift: 0.01 µV/°C maximum at 5 V

* Input noise

* Voltage: 88 nV p-p from 0.1 Hz to 10 Hz typical

* Spectral density voltage: 4.2 nV/√Hz typical at 1 kHz

* Rail-to-rail output

* Unity-gain stable

* GBP: 5 MHz typical

* Slew rate: 1.8 V/µs typical falling