Texas Instruments DRV5057/DRV5057-Q1 Linear Hall Effect Sensors
Texas Instruments DRV5057/DRV5057-Q1 Linear Hall Effect Sensors respond proportionally to magnetic flux density. The device can be used for accurate position sensing in various applications. The device operates from 3.3V or 5V 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 2kHz.
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 good interconnects. The device also features magnet temperature compensation to counteract how magnets drift for linear performance across a wide –40°C to +125°C temperature range. The Texas Instruments DRV5057-Q1 Linear Hall Effect Sensors are AEC-Q100 Qualified for automotive applications.
Features
- PWM-output linear hall effect magnetic sensor
- Operates from 3.3V and 5V power supplies
- 2kHz clock output with 50% quiescent duty cycle
- Magnetic sensitivity options (At VCC = 5V)
- A1: 2%D/mT, ±21mT range
- A2: 1%D/mT, ±42mT range
- A3: 0.5%D/mT, ±84mT range
- A4: 0.25%D/mT, ±168mT range
- Open-drain output with 20mA sink capability
- Compensation for magnet temperature drift
- Standard industry packages
- Surface-mount SOT-23
- Through-hole TO-92
- AEC-Q100 qualified for automotive applications
Applications
- Precise position sensing
- Industrial automation and robotics
- Home appliances
- Gamepads, pedals, keyboards, triggers
- Height leveling, tilt, and weight measurement
- Fluid flow rate measurement
- Medical devices
- Absolute angle encoding
- Current sensing
Datasheets
Functional Block Diagram
Related Development Tool
Texas Instruments DRV5055-5057EVM Sensor Evaluation Module (EVM)
Intended to provide a basic functional evaluation of DRV505x family of linear hall effect sensors.