AD8476 Differential Precision Amplifier

Low power, unity gain, fully differential amplifier and ADC driver

Image of Analog Devices' AD8476 Differential Precision AmplifierAnalog Devices' AD8476 is a very low power, fully differential precision amplifier with integrated gain resistors for unity gain. It is an ideal choice for driving low power, high-performance ADCs as a single-ended-to-differential or differential-to-differential amplifier. It provides a precision gain of 1, common-mode level shifting, low temperature drift, and rail-to-rail outputs for maximum dynamic range.

The AD8476 also provides overvoltage protection from large industrial input voltages up to ±23 V while operating on a dual 5 V supply. Power dissipation on a single 5 V supply is only 1.5 mW. The AD8476 works well with SAR, Σ-Δ, and pipeline converters. The high-current output stage of the part allows it to drive the switched capacitor front-end circuits of many ADCs with minimal error.

Unlike many differential drivers on the market, the AD8476 is a high precision amplifier. With 200 μV maximum output offset, 39 nV/√Hz noise, and −102 dB THD + N at 10 kHz, the AD8476 pairs well with low power, high-accuracy converters. Considering its low power consumption and high precision, the slew-enhanced AD8476 has excellent speed, settling to 16-bit precision for 250 kSPS acquisition times.

Features
  • High performance
    • Suitable for driving 16-bit converters up to 250 kSPS
    • 39 nV/√Hz output noise
    • 1 ppm/°C gain drift
    • 200 μV maximum output offset
    • 10 V/μs slew rate
    • 5 MHz bandwidth
  • Single supply: 3 V to 18 V
  • Very low power
    • 330 μA supply current
  • Fully differential or single-ended inputs/outputs
  • VOCM pin adjusts output common mode
  • Robust overvoltage up to 18 V beyond supplies
  • Differential output designed to drive precision ADCs
    • Drives switched capacitor and Σ-Δ ADCs
    • Rail-to-rail output
  • Dual supplies: ±1.5 V to ±9 V

AD8476

ImageManufacturer Part NumberDescriptionAvailable Quantity
EVAL-CN0271-SDPZ datasheet linkEVAL SYSTEM FOR CN0271EVAL-CN0271-SDPZEVAL SYSTEM FOR CN02715 - Immediate
26 - Factory Stock
EVAL-CN0271-SDPZ product page link
AD8476ARMZ datasheet linkIC OPAMP DIFF 5MHZ RRO 8MSOPAD8476ARMZIC OPAMP DIFF 5MHZ RRO 8MSOP0AD8476ARMZ product page link
AD8476BRMZ datasheet linkIC OPAMP DIFF 5MHZ RRO 8MSOPAD8476BRMZIC OPAMP DIFF 5MHZ RRO 8MSOP0AD8476BRMZ product page link
Published: 2013-04-16