MAX9621 双通道、2线霍尔传感器接口，提供模拟和数字输

MAX9621 双通道、2线霍尔传感器接口，提供模拟和数字输出

概述

The MAX9621 is a continuation of the Maxim family of Hall-effect sensor interfaces that already includes the MAX9921. The MAX9621 provides a single-chip solution to interface two 2-wire Hall-effect sensors to low voltage microprocessors (µP) through either a digital output for Hall-effect switches or an analog output for linear information or both.

The MAX9621 protects the Hall sensors from supply transients up to 60V at the BAT supply. Normal operating supply voltage ranges from 5.5V to 18V. If the BAT supply rises above 18V, the MAX9621 shuts off the current to the Hall sensors. When a short-to-ground fault condition is detected, the current to the Hall input is shut off and the condition is indicated at the analog output by a zero-current level and a high digital output.

The MAX9621 provides a minimum of 50µs blanking time following Hall sensor power-up or restart. The open-drain digital outputs are compatible with logic levels up to 5.5V.

The MAX9621 is available in a 3mm x 5mm, 10-pin µMAX® package and is rated for operation in the -40°C to +125°C temperature range.

关键特性

Provides Supply Current and Interfaces to Two 2-Wire Hall-Effect Sensors

5.5V to 18V Operating Voltage Range

Protects Hall Sensors Against Up to 60V Supply Transients

Low-Power Shutdown for Power Saving

Filtered Digital Outputs

Analog Output Mirrors the Hall Sensor Current

Hall Inputs Protected from Short to Ground

Hall Sensor Blanking Following Power-Up and Restart from Shutdown and Short to Ground

Operates with ±3V Ground Shift Between the Hall Sensor and the MAX9621

±2kV Human Body Model ESD and ±200V Machine Model ESD at All Pins

3mm x 5mm, 10-Pin µMAX Package

应用/使用

车锁控制
汽车天窗
点火钥匙
座位移动控制
汽车安全带扣锁
测速
驾驶杆
车窗升降控制

模拟接口传感器双通道数字输出

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