AD620 Instrumentation Amp Module
This device uses an AD620 as an amplifier that is capable of amplifying small voltage signal (e.g. µV) AC or DC. By adjusting the
on-board potentiometer, the magnification can be adjusted to go as high as up to 1000 times. This module has a low voltage offset,
great linearity, and also, an adjustable zero potentiometer to improve its accuracy.
Quick Spec
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Supply Range: 3-12VDC
Magnification: 1.5-1000 times
Signal Input Voltage: 100uV – 300mV DC/AC
Signal Output Range: ± (Vin-2V)
Offset Voltage: 50μV
Input Bias Current: 1.0nA (max)
Common Mode Rejection Ratio: 100 dB
Offset Voltage Drift: 0.6μV / ℃ (maximum)
Stability: 2μV / month maximum
Dimensions: 32 x 22 x 45 mm (L x W x D)
Weight: 4g
Board Layout
Zero Adjustment Calibration
Zero output calibration is done by shorting the input terminals and adjusting the Zero potentiometer until the output is equal to zero
Differential Mode
Differential Mode is used with bridge type sensors or any sensor with differential output