LM385-1.2集成电路（IC）的电压基准规格书PDF中文资料

LM385-1.2属于集成电路（IC）的电压基准。由德州仪器制造生产的LM385-1.2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。

1 Features

1• Operating Current Range

– LM285-1.2: 10 μA to 20 mA

– LM385-1.2: 15 μA to 20 mA

– LM385B-1.2: 15 μA to 20 mA band•

1% and 2% Initial Voltage Tolerance

• Reference Impedance

– LM385-1.2: 1 Ω MAX at 25°C

– All devices: 1.5 Ω MAX over Full

Temperature Range

• Very Low Power Consumption

• Interchangeable with Industry Standard

LM285-1.2 and LM385-1.2

2 Applications

• Portable Meter References

• Portable Test Instruments

• Battery-Operated Systems

• Current-Loop Instrumentation

• Panel Meters

3 Description

These micropower, two-terminal, band-gap voltage

references operate over a 10-μA to 20-mA current range and feature exceptionally low dynamic

impedance and good temperature stability. On-chip

trimming provides tight voltage tolerance. The band•

gap reference for these devices has low noise and long-term stability.

The design makes these devices exceptionally tolerant of capacitive loading and, thus, easier to use

in most reference applications. The wide dynamic

operating temperature range accommodates varying

current supplies, with excellent regulation.

The extremely low power drain of this series makes

them useful for micropower circuitry. These voltage

references can be used to make portable meters,

regulators, or general-purpose analog circuitry, with

battery life approaching shelf life. The wide operating

current range allows them to replace older references

with tighter-tolerance parts.