TL431BIPG

可编程精密参考源

The TL431, A, B integrated circuits are three-terminal programmable shunt regulator diodes. These monolithic IC voltage references operate as a low temperature coefficient zener which is programmable from V to 36 V 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 obtain a stable reference from 5.0 V logic supplies, and since the TL431, A, B operates as a shunt regulator, it can be used as either a positive or negative voltage reference.

Features

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Programmable Output Voltage to 36 V

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Voltage Reference Tolerance: +/- 0.4%, Typ @ 25°C TL431B

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Low Dynamic Output Impedance, 0.22 W Typical

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Sink Current Capability of 1.0 mA to 100 mA

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Equivalent Full-Range Temperature Coefficient of 50 ppm/ °C Typical

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Temperature Compensated for Operation over Full Rated Operating Temperature Range

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Low Output Noise Voltage

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Pb-Free Packages are Available