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Order this document by TL431/D TL431, A, B Series Programmable Precision References PROGRAMMABLE PRECISION REFERENCES The TL431, A, B integrated circuits are three–terminal programmable shunt regulator diodes. These monolithic IC voltage references operate as a SEMICONDUCTOR low temperature coefficient zener which is programmable from Vref to 36 V TECHNICAL DATA with two external resistors. These devices exhibit a wide operating current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 ?. 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 Z, LP SUFFIX obtain a stable reference from 5.0 V l