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AD8290:  G = 50, CMOS SENSOR AMPLIFIER WITH CURRENT EXCITATION

The AD8290 contains both an adjustable current source to drive a sensor and a difference amplifier to amplify the signal voltage. The amplifier is set for a fixed gain of 50. The AD8290 is an excellent solution for both the drive and the sensing aspects required for pressure, temperature, and strain gage bridges.

In addition, because the AD8290 operates with low power, works with a ...More

AD8290:  G = 50, CMOS SENSOR AMPLIFIER WITH CURRENT EXCITATION

Product Description

The AD8290 contains both an adjustable current source to drive a sensor and a difference amplifier to amplify the signal voltage. The amplifier is set for a fixed gain of 50. The AD8290 is an excellent solution for both the drive and the sensing aspects required for pressure, temperature, and strain gage bridges.

In addition, because the AD8290 operates with low power, works with a range of low supply voltages, and is available in a low profile package, it is suitable for drive/sense circuits in portable electronics as well.

The AD8290 is available in a lead free 3.0 mm × 3.0 mm × 0.55 mm package and is operational over the industrial temperature range of −40°C to +85°C.

Applications

  • Bridge and sensor drives
  • Portable electronics

    • Data Sheet, Rev. B, 2/08

    RESOURCES & TOOLS

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    • Supply voltage range: 2.6 V to 5.5 V
    • Low power
      1.2 mA + 2× excitation current
      0.5 μA shutdown current
    • Low input bias current: ± 100 pA
    • High CMRR: 120 dB
    • Space savings: 16-lead, 3.0 mm × 3.0 mm × 0.55 mm LFCSP
    • Excitation current
      300 μA to 1300 μA range
      Set with external resistor
    • Single/Dual Supply: Single
    • Voltage Supply (Vmax) : +5.5V
    • Gain Setting Method: fixed
    • Gain Range (min to max): 50
    • CMRR (dB): 120dB
    • Vnoise RTI 1-10 Hz µVp-p : 0.75µV p-p
    • Temperature Range: -40 to +85
    • Supply Current : 1.8mA
    • Package: LFCSP

    Functional Block Diagram for AD8290

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    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.