DRV5057传感器变送器的磁性传感器-线性罗盘（IC）规格书PDF中文资料

1 Features

1• AEC-Q100 qualified for automotive applications

– Temperature grade 0: –40°C to 150°C

• PWM-output linear Hall effect magnetic sensor

• Operates from 3.3-V and 5-V power supplies

• 2-kHz clock output with 50% quiescent duty cycle

• Magnetic sensitivity options (at VCC = 5 V):

– A1: 2%D/mT, ±21-mT range

– A2: 1%D/mT, ±42-mT range

– A3: 0.5%D/mT, ±84-mT range

– A4: 0.25%D/mT, ±168-mT range

• Open-drain output with 20-mA sink capability

• Compensation for magnet temperature drift

• Industry standard package:

– Surface-mount SOT-23

2 Applications

• Automotive position sensing

• Brake, acceleration, clutch pedals

• Torque sensors, gear shifters

• Throttle position, height leveling

• Powertrain and transmission components

• Absolute angle encoding

• Current sensing

3 Description

The DRV5057-Q1 is a linear Hall effect sensor that

responds proportionally to magnetic flux density. The

device can be used for accurate position sensing in a

wide range of applications.

The device operates from 3.3-V or 5-V power

supplies. When no magnetic field is present, the

output produces a clock with a 50% duty cycle. The

output duty cycle changes linearly with the applied

magnetic flux density, and four sensitivity options

maximize the output dynamic range based on the

required sensing range. North and south magnetic

poles produce unique outputs. The typical pulse-width

modulation (PWM) carrier frequency is 2 kHz.

Magnetic flux perpendicular to the top of the package

is sensed, and the two package options provide

different sensing directions.

Because the PWM signal is based on edge-to-edge

timing, signal integrity is maintained in the presence

of voltage noise or ground potential mismatch. This

signal is suitable for distance transmission in noisy

environments, and the always-present clock allows

the system controller to confirm there are good

interconnects. Additionally, the device features

magnet temperature compensation to counteract how

magnets drift for linear performance across a wide

–40°C to +150°C temperature range.