ADA4638 30 V Rail-to-Rail Precision Amplifier

By Analog Devices Inc 183

ADA4638 30 V Rail-to-Rail Precision Amplifier

ADI's ADA4638-1 is a high voltage, high precision, zero-drift amplifier featuring rail-to-rail output swing. It is guaranteed to operate from 4.5 V to 30 V single supply or ±2.25 V to ±15 V dual supplies while consuming less than 0.95 mA of supply current at ±5 V.

With an offset voltage of 4 μV, offset drift less than 0.05 μV/°C, no 1/f noise, and input voltage noise of only 1.2 μV p-p (0.1 Hz to 10 Hz), the ADA4638-1 is suited for high precision applications where large error sources cannot be tolerated. Pressure sensors, medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift over the wide operating temperature range.

Many applications can take advantage of the rail-to-rail output swing provided by the ADA4638-1 to maximize the signal-to-noise ratio (SNR). The ADA4638-1 is specified for the extended industrial (-40°C to +125°C) temperature range and is available in 8-lead LFCSP (3 mm x 3 mm) and SOIC packages.

  • Dual supply operation: ±2.25 V to ±15 V
  • Single Supply Operation: 4.5 V to 30 V
  • Low offset voltage: 4 μV maximum
  • Input offset voltage drift: 0.05 μV/°C maximum
  • High gain: 130 dB minimum
  • High PSRR: 120 dB minimum
  • High CMRR: 130 dB minimum
  • Input common-mode range includes lower supply rail
  • Rail-to-rail output
  • Low supply current: 0.95 mA maximum
  • Medical instrumentation
  • Electronic weigh scale
  • Pressure and position sensors
  • Strain gauge amplifiers
  • Thermocouple amplifiers