The ADA4522-1 / ADA4522-2 / ADA4522-4 are single/dual/quad channel, zero drift op amps with low noise and power, ground sensing inputs, and rail-to-rail output, optimized for total accuracy over time, temperature, and voltage conditions. The wide operating voltage and temperature ranges, as well as the high open-loop gain and very low dc and ac errors make the devices well suited for amplifying very small input signals and for accurately reproducing larger signals in a wide variety of applications.
The ADA4522-1 / ADA4522-2 / ADA4522-4 performance is specified at 5.0 V, 30 V, and 55 V power supply voltages. These devices operate over the range of 4.5 V to 55 V, and are excellent for applications using single-ended supplies of 5 V, 10 V, 12 V, and 30 V, or for applications using higher single supplies and dual supplies of ±2.5 V, ±5 V, and ±15 V. The ADA4522-1 / ADA4522-2 / ADA4522-4 use on-chip filtering to achieve high immunity to electromagnetic interference (EMI).
The ADA4522-1 / ADA4522-2 / ADA4522-4 are fully specified over the extended industrial temperature range of −40°C to +125°C and are available in 8-lead MSOP, 8-lead SOIC, 14-lead SOIC, and 14-lead TSSOP packages.
Applications
Inductance, capacitance, and resistance (LCR) meter/megohmmeter front-end amplifiers
Load cell and bridge transducers
Magnetic force balance scales
High precision shunt current sensing
Thermocouple/resistance temperature detector (RTD) sensors
Programmable logic controller (PLC) input and output amplifiers
### Features and Benefits
Low offset voltage: 5 μV maximum
Extremely low offset voltage drift: 22 nV/°C maximum
Low voltage noise density:
5.8 nV/√Hz typical
117 nV p-p typical from 0.1 Hz to 10 Hz
Low input bias current: 50 pA typical
Unity-gain crossover: 3 MHz typical
Single-supply operation: input voltage range includes ground and rail-to-rail output
