AD8428 Instrumentation Amplifier

By Analog Devices Inc 244

AD8428 Instrumentation Amplifier

Analog Devices' AD8428 is an ultra-low-noise instrumentation amplifier designed to accurately measure tiny, high speed signals. It delivers exceptional gain accuracy, noise, and bandwidth. All gain setting resistors for the AD8428 are internal to the part and are precisely matched. Care is taken in both the chip pinout and layout. This results in excellent gain drift and quick settling to the final gain value after the part is powered on. The high CMRR of the AD8428 prevents unwanted signals from corrupting the signal of interest. The pinout of the AD8428 is designed to avoid parasitic capacitance mismatches that can degrade CMRR at high frequencies.

  • Access to internal nodes provides flexibility
  • Low noise: 1.5 nV/√Hz input voltage noise
  • Bandwidth: 3.5 MHz
  • Slew rate: 40 V/μs
  • Power supply range: ±4 V to ±18 V
  • High accuracy dc performance
    • Gain drift: 10 ppm/°C
    • Offset drift: 1 μV/°C
    • Gain accuracy: 0.2%
    • CMRR: 130 dB min