Overview
The DRV5055A4QLPGM is a ratiometric linear Hall effect sensor produced by Texas Instruments. This device is designed for accurate position sensing and responds proportionally to magnetic flux density. It operates from either 3.3-V or 5-V power supplies and is available in various package options, including the TO-92 package for the DRV5055A4QLPGM variant.
The DRV5055 features fully integrated signal conditioning, temperature compensation circuits, mechanical stress cancellation, and amplifiers. It outputs an analog voltage that is referenced to VCC, making it suitable for a wide range of applications requiring precise magnetic field measurement.
Key Specifications
| Parameter | Test Conditions | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|
| VCC (Power-supply voltage) | - | 3 | - | 5.5 | V |
| ICC (Operating supply current) | VCC = 3 V to 3.63 V and 4.5 V to 5.5 V | 6 | 10 | - | mA |
| fBW (Sensing bandwidth) | - | - | 20 | - | kHz |
| td (Propagation delay time) | From change in B to change in OUT | 10 | - | - | µs |
| Sensitivity (at 25°C) | VCC = 3.3 V | 7.1 | 7.5 | 7.9 | mV/mT |
| BL (Linear magnetic sensing range) | VCC = 3.3 V, TA = 25°C | ±176 | - | - | mT |
| TA (Operating ambient temperature) | - | -40 | - | 125 | °C |
Key Features
- Ratiometric Architecture: The device uses a ratiometric architecture that can eliminate error from VCC tolerance when the external analog-to-digital converter (ADC) uses the same VCC for its reference.
- Temperature Compensation: The DRV5055 includes magnet temperature compensation to counteract the drift of magnets over a wide temperature range (-40°C to 125°C).
- Linear Output: The output voltage changes linearly with the applied magnetic flux density, and four sensitivity options are available to maximize the output voltage swing based on the required sensing range.
- Low Noise: The device features low output-referred noise, which can be further reduced with an RC filter if the full device bandwidth is not needed.
- Compact Packages: Available in SOT-23 and TO-92 packages, providing different sensing directions based on the package type.
Applications
- Position Sensing: Accurate position sensing in various applications.
- Fluid Flow Rate Measurement: Measuring fluid flow rates in industrial and medical devices.
- Medical Devices: Used in medical devices requiring precise magnetic field measurements.
- Absolute Angle Encoding: Encoding absolute angles in mechanical systems.
- Current Sensing: Sensing current in electrical systems.
Q & A
- What is the operating voltage range of the DRV5055A4QLPGM?
The DRV5055A4QLPGM operates from 3.3-V to 5.5-V power supplies, with two recommended operating VCC ranges: 3 V to 3.63 V and 4.5 V to 5.5 V.
- What is the sensing bandwidth of the DRV5055A4QLPGM?
The sensing bandwidth of the DRV5055A4QLPGM is 20 kHz.
- How does the DRV5055A4QLPGM handle temperature variations?
The device includes temperature compensation circuits to counteract the drift of magnets over a wide temperature range (-40°C to 125°C).
- What are the available package options for the DRV5055?
The DRV5055 is available in SOT-23 and TO-92 packages.
- How does the output voltage of the DRV5055A4QLPGM change with magnetic flux density?
The output voltage changes linearly with the applied magnetic flux density.
- What is the typical quiescent voltage of the DRV5055A4QLPGM at 25°C?
The quiescent voltage is typically half of VCC.
- How does the sensitivity of the DRV5055A4QLPGM vary with temperature?
The sensitivity can either increase with temperature or remain constant, depending on the device option (DRV5055A1-A4 or DRV5055Z1-Z4).
- What is the propagation delay time of the DRV5055A4QLPGM?
The propagation delay time is 10 µs from the change in magnetic flux density to the change in output voltage.
- Can the noise of the DRV5055A4QLPGM be reduced?
Yes, the noise can be reduced with an RC filter if the full device bandwidth is not needed.
- What are some common applications of the DRV5055A4QLPGM?
Common applications include position sensing, fluid flow rate measurement, medical devices, absolute angle encoding, and current sensing.
