Feature
- Ratiometric Linear Hall Effect Magnetic Sensor
- Operates From3.3-V and 5-V Power Supplies
- Analog Output WithVCC / 2 Quiescent Offset
- MagneticSensitivity Options (At VCC = 5 V):
- A1: 100 mV/mT, ±21-mT Range
- A2: 50 mV/mT, ±42-mT Range
- A3: 25mV/mT, ±85-mT Range
- A4: 12.5 mV/mT, ±169-mTRange
- Fast 20-kHz SensingBandwidth
- Low-Noise Output With ±1-mADrive
- Compensation For Magnet TemperatureDrift
- Standard IndustryPackages:
- Surface-Mount SOT-23
- Through-Hole TO-92
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DescriptionThe DRV5055 device is a linear Hall effect sensor that respondsproportionally to magnetic flux density. The device can be used for accurate position sensing in awide range of applications.
The device operates from 3.3-V or 5-V power supplies. When no magnetic field is present,the analog output drives half of VCC. The output changes linearly with theapplied magnetic flux density, and four sensitivity options enable maximal output voltage swingbased on the required sensing range. North and south magnetic poles produce unique voltages.
Magnetic flux perpendicular to the top of the package is sensed, and the two packageoptions provide different sensing directions.
The device uses a ratiometric architecture that can eliminate error fromVCC tolerance when the external analog-to-digital converter (ADC) uses thesame VCC for its reference. Additionally, the device features magnettemperature compensation to counteract how magnets drift for linear performance across a wide –40°Cto 125°C temperaturerange.
