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Texas Instruments INA823 Precision Instrumentation Amplifier

Texas Instruments INA823 Precision Instrumentation Amplifiers offer low power consumption and operate over a wide, single-supply, or dual-supply range. A single external resistor sets any gain from 1 to 10,000. The device provides low input offset voltage, low offset voltage drift, low input bias current, and low current noise while remaining cost-effective. Additional circuitry protects the inputs against overvoltage up to ±60V.

The Texas Instruments INA823 is optimized to provide a high common-mode rejection ratio. At G = 1, the common-mode rejection ratio exceeds 84dB across the full input common-mode range. The INA823 has a wide common-mode voltage range as low as 150mV below negative supply. The device is designed for low-voltage operation from a 2.7V single supply and dual supplies up to ±18V. The low power and single-supply operation enable hand-held, battery-operated systems.

Features

  • Input overvoltage protection up to ±60V
  • Input voltage extends 150mV below the negative supply
  • 180µA (typ.) low power supply current
  • Precision performance
    • 20µV (typ.), 100µV (max.) low offset voltage
    • 8nA (max.) low input bias current
    • Common-mode rejection
      • 84dB, G = 1 (min.)
      • 104dB, G = 10 (min.)
      • 120dB, G ≥ 100 (min.)
    • Power supply rejection (100dB, G = 1 (min.))
  • 21nV/√Hz input voltage noise
  • 1.9MHz (G = 1), 60kHz (G = 100) bandwidth
  • Stable with 1nF capacitive loads
  • Supply range
    • 2.7V to 36V single-supply
    • ±1.35V to ±18V dual-supply
  • –40°C to +125°C specified temperature range
  • 8-pin SOIC and 8-pin VSSOP packages

Applications

  • Flow transmitter
  • Wearable fitness and activity monitor
  • Infusion pump
  • Blood glucose monitor
  • Electrocardiogram (ECG)
  • Surgical equipment
  • Weigh scale
  • Analog input module
  • Process analytics (pH, gas, concentration, force, and humidity)
  • Battery test

Functional Block Diagram

Block Diagram - Texas Instruments INA823 Precision Instrumentation Amplifier

Related Development Tool

Texas Instruments Instrumentation Amplifier Evaluation Modules

Provides functional evaluation of instrumentation amplifiers in the MSOP-8 and SO-8 packages.

Learn Moreabout Texas Instruments Instrumentation Amplifier Evaluation Modules View Productsrelated to Texas Instruments Instrumentation Amplifier Evaluation Modules
Published: 2022-04-05 | Updated: 2022-04-25