MAX977中文资料单/双路、+3V/+5V双速度比较器，带有自动待机功能数据手册ADI规格书

描述 Description

The MAX975/MAX977 single/dual comparators featurethree different operating modes, and are optimized for+3V and +5V single-supply applications. The operatingmodes are as follows: high speed, high speed withauto-standby, and low power. Propagation delay is 28nsin high-speed mode, while supply current is only 250µA.Supply current is reduced to 3µA in low-power mode.
The auto-standby feature allows the comparator toautomatically change from low-power mode to highspeedmode upon receipt of an input signal. In theabsence of an input signal, the comparator revertsback to low-power mode after an adjustable timeoutperiod. The timeout period for the MAX975 to enterstandby is set by a single capacitor. The dual MAX977features independently adjustable timeout periods foreach comparator using separate capacitors.
The MAX975/MAX977's inputs have a common-modevoltage range of -0.2V to (VCC - 1.2V). The differentialinput voltage range extends rail to rail. The outputs arecapable of rail-to-rail operation without external pull-upcircuitry, making these devices ideal for interface withCMOS/TTL logic. All inputs and outputs can tolerate acontinuous short-circuit fault condition to either rail. Thecomparator's internal hysteresis in high-speed modeensures clean output switching, even with slow-movinginput signals.
The single MAX975 is available in 8-pin SO and 8-pinµMAX® packages, while the dual MAX977 is availablein 14-pin SO and 16-pin QSOP packages.

特性 Features

• Three Operating Modes:
• High Speed
• High Speed with Auto-Standby
• Low Power
• 28ns Propagation Delay (high-speed mode)
• 5µA Max Supply Current in Low-Power/Auto-Standby Modes
• +3V/+5V Single-Supply Operation
• Rail-to-Rail Outputs
• Ground-Sensing Input
• Internal Hysteresis (high-speed mode)
• Adjustable Timeout Period
• µMAX Package (MAX975) QSOP-16 Package (MAX977)

应用 Application

• 3V系统
• 电池供电应用
• 数字线接收器
• IR接收器
• 遥控钥匙
• 射频ID标记
• 门限检测器/鉴别器

简介

MAX977属于集成电路（IC）的比较器。由制造生产的MAX977比较器逻辑比较器系列产品用于根据以数字格式表示的信息比较结果来生成输出；身份型比较器指示两个输入是否相同，幅度型比较器还指示两个输入不相同时哪个较大。它们不同于比较两个模拟输入幅度的器件，后者称为线性比较器且单独分类。