LM1815中文资料自适应可变磁阻传感器放大器数据手册TI规格书

描述 Description

The LM1815 is an adaptive sense amplifier and default gating circuit for motor control applications. The sense amplifier provides a one-shot pulse output whose leading edge coincides with the negative-going zero crossing of a ground referenced input signal such as from a variable reluctance magnetic pick-up coil.
In normal operation, this timing reference signal is processed (delayed) externally and returned to the LM1815. A Logic input is then able to select either the timing reference or the processed signal for transmission to the output driver stage.
The adaptive sense amplifier operates with a positive-going threshold which is derived by peak detecting the incoming signal and dividing this down. Thus the input hysteresis varies with input signal amplitude. This enables the circuit to sense in situations where the high speed noise is greater than the low speed signal amplitude. Minimum input signal is 150mVP-P.

特性 Features

• Adaptive Hysteresis
• Single Supply Operation
• Ground Referenced Input
• True Zero Crossing Timing Reference
• Operates from 2V to 12V Supply Voltage
• Handles Inputs from 100 mVP-P to over 120VP-P with External Resistor
• CMOS Compatible Logic

简介

LM1815属于集成电路（IC）的传感器检测器接口。由TI制造生产的LM1815传感器和检测器接口该系列产品可执行信号调节、数据转换、激励生成和/或各种将传感器或变送器机构连接到主机设备所需的其他功能。示例包括用于 CCD 图像传感器的控制器、用于 4-20 mA 接口和类似应用的电流变送器、超声变送器前端、惠斯通电桥接口等。