MAX975ESA

单/双通道， + 3V / 5V +双高速比较器具有自动待机 Single/Dual, +3V/+5V Dual-Speed Comparators with Auto-Standby

General Description

The MAX975/MAX977 single/dual comparators feature three different operating modes, and are optimized for +3V and +5V single-supply applications. The operating modes are as follows: high speed, high speed with auto-standby, and low power. Propagation delay is 28ns in 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 to automatically change from low-power mode to high speed mode upon receipt of an input signal. In the absence of an input signal, the comparator reverts back to low-power mode after an adjustable timeout period. The timeout period for the MAX975 to enter standby is set by a single capacitor. The dual MAX977 features independently adjustable timeout periods for each comparator using separate capacitors.

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

Applications

Battery-Powered Systems

RF ID Tags

Keyless Entry

Threshold Detectors/Discriminators

3V Systems

IR Receivers

Digital-Line Receivers