FEATURES

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

PSRR: 168 dB typical at VS = 4.5 V to 36 V

Open-loop voltage gain: 160 dB typical at VOUT = −14.75 V to +14.75 V, RL = 10 kΩ, VS = 30 V

CMRR: 160 dB typical at VCM = −15.1 V to +13.5 V, VS = 30 V

Integrated EMI filters

Shutdown mode

Ground sense

Available in 8-lead SOIC, 8-lead MSOP, and 8-lead LFCSP

APPLICATIONS

High resolution data acquisition

Reference buffering

Test and measurement

Electronic scales

Thermocouple amplifiers

Strain gages

Low-side current sense

GENERAL DESCRIPTION

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.

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