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TL431 - three-terminal programmable shunt regulator diode

Key Features

  • igure 6.) ppm V ref _C + ǒ T1 Ambient Temperature D Vref V ref @ 25_C D T Ǔ T2 X 10 6 +DT V ref D Example : DV V + 8.0 mV and slope is positive, @ 25_C + 2.495 V, DT + 70_C ref A ref a 3. The dynamic impedance ZKA is defined as |Z KA| K When the device is programmed with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of the circuit is defined as: |Z KA + DDVIKA x 106 + 45.8 ppmń_C + 0.008 70 (2.495) Ȁ| [ |ZKA| ǒ 1 ) R1 R2 Ǔ 4.

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Order this document by TL431/D TL431, A, B Programmable Precision References 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 Vref 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 Ω. 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.