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TL431 - Voltage Reference

TL431 - Voltage Reference
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Description: The TL431 is a three−terminal programmable shunt regulator diode. This monolithic IC voltage reference operates as a low temperature coefficient zener which is programmable from Vref to 36 V with two external resistors. They exhibit a wide operating current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 Ohms.

The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op-amp circuitry. The 2.5 V reference makes it convenient to obtain a stable reference from 5.0 V logic supplies, and since the TL431 operates as a shunt regulator, it can be used as either a positive or negative voltage reference.


  • Programmable Output Voltage to 36 V
  • Voltage Reference Tolerance: ±0.4%, Typ @ 25°C (TL431B)
  • Low Dynamic Output Impedance, 0.22 Ohms Typical
  • Sink Current Capability of 1.0 mA to 100 mA
  • Equivalent Full−Range Temperature Coefficient of 50 ppm/°C Typical
  • Temperature Compensated for Operation over Full Rated Operating Temperature Range
  • Low Output Noise Voltage
  • Pb and Halide−Free


SKU COM-11078
Stock On Backorder
Ships In 1 to 2 weeks.
Weight 0.01 oz
Price: $0.50
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