High Accuracy Data Acquisition Instrumentation Amplifier

The AD522 is a precision IC instrumentation amplifier designed for data acquisition applications requiring high accuracy under worst-case operating conditions. An outstanding combination of high linearity, high common mode rejection, low voltage drift, and low noise makes the AD522 suitable for use in many 12-bit data acquisition systems.

An instrumentation amplifier is usually employed as a bridge amplifier for resistance transducers (thermistors, strain gages, etc.) found in process control, instrumentation, data processing, and medical testing. The operating environment is frequently characterized by low signal-to-noise levels, fluctuating temperatures , unbalanced input impedances, and remote location which hinders recalibration.

* Low Drift: 2.0µV/° C (AD522B)

* Low Nonlinearity: 0.005% (G = 100)

* High CMRR: >110dB (G = 1000)

* Low Noise: 1.5µV p-p (0.1 to 100Hz)

* Low Initial VOS: 100µV (AD522B)

* Single-Resistor Gain Programmable: 1≤G≤1000