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Part Details
  • Initial accuracy
    A grade: ±0.24%
    B grade: ±0.12% 
  • Maximum temperature coefficient
    A grade: 25 ppm/°C
    B grade: 9 ppm/°C 
  • Low dropout: 300 mV for ADR121, ADR125 
  • High output current: +5 mA/−2 mA 
  • Low typical operating current: 85 μA 
  • Input range: 2.7 V to 18 V for ADR127
  • Temperature range: −40°C to +125°C 
  • Tiny TSOT (UJ-6) package 

Additional Details
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The ADR121/ADR125/ADR127 are a family of micropower, high precision, series mode, band gap references with sink and source capability. The parts feature high accuracy and low power consumption in a tiny package. The ADR12x design includes a patented temperature-drift curvature correction technique that minimizes the nonlinearities in the output voltage vs. temperature characteristics.

The ADR12x is a low dropout voltage reference, requiring only 300 mV for ADR121/ADR125 and 1.45 V for ADR127 above the nominal output voltage on the input to provide a stable output voltage. This low dropout performance, coupled with the low 85 μA operating current, makes the ADR12x ideal for battery-powered applications.

Available in an extended industrial temperature range of −40°C to +125°C, the ADR121/ADR125/ADR127 are housed in the tiny TSOT (UJ-6) package.


  • Battery-powered instrumentation
  • Portable medical equipment
  • Data acquisition systems
  • Automotive

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Software & Part Ecosystem

Software & Part Ecosystem

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Reference Designs 1

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