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