PRODUCT DESCRIPTION
The AD622 is a low cost, moderately accurate instrumentation amplifier that requires only one external resistor to set any gain between 2 and 1,000. Or for a gain of 1, no external resistor is required. The AD622 is a complete difference or subtracter amplifier “system” while providing superior linearity and commonmode rejection by incorporating precision laser trimmed resistors.

FEATURES
    Easy to Use
    Low Cost Solution
    Higher Performance than Two or Three Op Amp Design
    Unity Gain with No External Resistor
    Optional Gains with One External Resistor (Gain Range 2 to 1000)
    Wide Power Supply Range (62.6 V to 615 V)
    Available in 8-Lead PDIP and SOIC
    Low Power, 1.5 mA max Supply Current

GOOD DC PERFORMANCE
    0.15% Gain Accuracy (G = 1)
    125 mV max Input Offset Voltage
    1.0 mV/8C max Input Offset Drift
    5 nA max Input Bias Current
    66 dB min Common-Mode Rejection Ratio (G = 1)

NOISE
    12 nV/√Hz @ 1 kHz Input Voltage Noise
    0.60 mV p-p Noise (0.1 Hz to 10 Hz, G = 10)

EXCELLENT AC CHARACTERISTICS
    800 kHz Bandwidth (G = 10)
    10 ms Settling Time to 0.1% @ G = 1–100
    1.2 V/ms Slew Rate

APPLICATIONS
    Transducer Interface
    Low Cost Thermocouple Amplifier
    Industrial Process Controls
    Difference Amplifier
    Low Cost Data Acquisition