Analog Devices Inc. AD620 Instrumentation Amplifiers

Analog Devices AD620 Instrumentation Amplifiers are low-cost, high-accuracy amplifiers that require only one external resistor to set gains of 1 to 10,000. These amplifiers feature 8-lead SOIC and DIP packaging that is smaller than discrete designs. The AD620 instrumentation amplifiers offer lower power and high 40ppm (maximum) nonlinearity accuracy. In addition to this, these amplifiers also provide a low offset voltage of 50μV (maximum) and an offset drift of 0.6μV/°C (maximum). The low input bias current of 1nA (maximum) is made possible with the use of Superβeta processing in the input stage. Typical applications include battery-powered, portable, and medical devices.

Features

Easy to use:
- Gain set with one external resistor
  - 1 to 10,000 gain range
- ±2.3V to ±18V wide power supply range
- Higher performance than three op-amp in-amp (IA) designs
- Available in 8-lead DIP and SOIC packaging
- 1.3mA maximum supply current
Excellent dc performance (B grade):
- 50μV (maximum) input offset voltage
- 0.6μV/°C (maximum) input offset drift
- 1nA (maximum) input bias current
- 100dB (minimum) common-mode rejection ratio (G = 10)

Low noise:
- 9nV/√Hz at 1kHz input voltage noise
- 0.28μV p-p noise (0.1Hz to 10Hz)
Excellent ac specifications:
- 120kHz bandwidth (G = 100)
- 15μs settling time to 0.01%