ADA4627/ADA4637 Wide Bandwidth Precision Amplifier

ADA4627/ADA4637 Wide Bandwidth Precision Amplifier

ADI's ADA4627 and ADA4637 are wide bandwidth precision amplifiers that feature low noise and very low offset, drift, and bias current. The device operates from ±5 V to ±15 V dual supply. Combining the best specifications of precision DC and high-speed AC op amps, these amplifiers provide benefits previously found in few amplifiers.

The ADA4637 is a decompensated version of the ADA4627 and is stable at a noise gain of 5 or greater. With a typical offset voltage of only 70 µV, drift of less than 1 µV/°C, and noise of only 0.86 µVPP (0.1 Hz to 10 Hz), it is suited for applications where error sources cannot be tolerated. The ADA4627/ADA4637 is specified for both an industrial temperature range of -25°C to +85°C and an extended industrial temperature range of -40°C to +125°C. These amplifiers are available in a tiny 8-lead SOIC package as well as 8-lead LFSCP package. The ADA4627/ADA4637 was designed for high impedance sensors, photodiode, and precision instrumentational applications.

Features
  • Low offset voltage: 200 µV (max.)
  • Offset drift: 1 µV/°C (typ.)
  • Very low input bias current: 5 pA (max.)
  • Extended temperature range: -40°C to +125°C
  • ±5 V to ±15 V dual supply
  • GBW: 79 MHz 
  • Voltage noise: 6.1 nV/√Hz at 1 kHz
  • Slew rate: 170 V/µs
  • High gain: 120 dB (typ.)
  • High CMRR: 116 dB (typ.)
  • High PSRR: 112 dB (typ.)
Applications
  • High impedance sensors
  • Photodiode amplifiers
  • Precision instrumentation
  • Phase-locked loop filters
  • High end, professional audio
  • DAC output amplifiers
  • ATE
  • Medical

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