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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fref54″>View Datasheet

Texas Instruments REF54 Precision Voltage Reference

Texas Instruments REF54 Precision Voltage Reference is a high precision, low-drift, low current consumption series voltage reference device. The REF54 offers a low-temperature drift coefficient (0.8ppm/°C), low noise (0.11ppmp-p), and high accuracy (±0.02%) while consuming 260µA current. The REF54, with low long-term drift (25ppm), excellent load, and line regulation, helps meet the strict performance requirements of high-precision applications. The device family is designed as a companion device for high-resolution data converters such as ADS8900B, ADS127L11, ADS1285, and DAC11001B.

The Texas Instruments REF54 supports a wide supply voltage rating of 18V. This rating also protects the device in case of power supply IC failure. The REF54 device supports up to 10mA load current. The wide load current support allows for directly connecting REF54 as a power supply to precision sensors. The REF54 is specified for the two temperature ranges: C grade is set for 0°C to 70°C and Q grade is established for -40°C to +125°C. The wide temperature range enables operation across various industrial applications.

Features

  • Low-temperature drift coefficient
    • 0.8ppm/°C maximum (C grade, 0°C to 70°C)
    • 1.5ppm/°C maximum (Q grade, -40°C to 125°C)
  • Low noise (0.1Hz to 10Hz)
    • 0.11ppmp-p with CNR = 100µF
    • 0.45ppmp-p with CNR = Open
  • ±0.02% maximum high accuracy
  • Designed for a wide range of applications
    • Wide input voltage up to 18V
    • Output current of ±10mA
    • Voltage options of 2.5V, 3V, 4.096V, 4.5V, 5V
  • 380µA maximum low quiescent current
  • Low long-term stability (1k hr) of 25ppm
  • Fit for all design requirements
    • Stable with 1µF to 100µF output low-ESR capacitor
    • High PSRR of 100dB at 1kHz
    • Operating temperature range of −40°C to +125°C
    • Pin-to-pin to REF50xx family when TEMP pin is not used

Applications

  • Semiconductor test equipment
  • Precision data acquisition systems
  • Precision weight scales
  • Ultrasound scanner
  • X-ray systems
  • Industrial instrumentation
  • PLC analog I/O modules
  • Field transmitters
  • Power monitoring
  • Battery management system

Functional Block Diagram

Block Diagram - Texas Instruments REF54 Precision Voltage Reference

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Texas Instruments REF54 Precision Voltage Reference