TL431A数据手册集成电路（IC）的电压基准规格书PDF

描述 Description

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 W. 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.

特性 Features

• Programmable Output Voltage to 36 V
• Voltage Reference Tolerance:+/- 0.4%, Typ @ 25°C (TL431B)
• Low Dynamic Output Impedance, 0.22 W 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-Free Packages are Available

简介

TL431A属于集成电路（IC）的电压基准。由制造生产的TL431A电压基准产品属于基准电压源系列，可通过相对较不稳定的电源提供稳定的电势，电压值始终保持恒定，以便在测量、控制和类似应用中用作比较的标准。其功能行为可能与用于大功率调节的线性稳压器相似，但基准电压源器件却不适合用于此类用途。用作比较标准时，若输出电流容量或实际负载电流增大，其性能通常会降低。