Overview
The DRV5055A4QDBZT is a ratiometric linear Hall effect sensor produced by Texas Instruments. This device is designed to respond proportionally to magnetic flux density, making it suitable for accurate position sensing in a wide range of applications. It operates from either 3.3-V or 5-V power supplies and provides an analog output that is referenced to VCC, with a quiescent offset of VCC / 2. The DRV5055A4QDBZT features integrated signal conditioning, temperature compensation circuits, mechanical stress cancellation, and amplifiers, ensuring reliable and precise measurements across various temperatures.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Power-supply voltage) | 3 | - | 5.5 | V |
| Operating Ambient Temperature | -40 | - | 125 | °C |
| ICC (Operating supply current) | 6 | 10 | - | mA |
| tON (Power-on time) | 175 | 330 | - | µs |
| fBW (Sensing bandwidth) | - | 20 | - | kHz |
| td (Propagation delay time) | 10 | - | - | µs |
| Sensitivity (VCC = 3.3 V, TA = 25°C) | 7.1 | 7.5 | 7.9 | mV/mT |
| Sensitivity (VCC = 5 V, TA = 25°C) | 11.9 | 12.5 | 13.2 | mV/mT |
| BL (Linear magnetic sensing range, VCC = 3.3 V, TA = 25°C) | -176 | - | 176 | mT |
| VL (Linear range of output voltage) | 0.2 | - | VCC - 0.2 | V |
Key Features
- Ratiometric Linear Hall Effect Sensor: The device provides an analog output proportional to the magnetic flux density, with the output voltage referenced to VCC.
- Dual Power Supply Compatibility: Operates from either 3.3-V or 5-V power supplies.
- Temperature Compensation: Includes magnet temperature compensation to counteract magnet drift, ensuring linear performance across a wide temperature range (-40°C to 125°C).
- Integrated Signal Conditioning: Features fully integrated signal conditioning, mechanical stress cancellation, and amplifiers.
- Low Noise and High Sensitivity: Offers low output-referred noise and high sensitivity options, making it suitable for precise measurements.
- Compact Packages: Available in SOT-23 (DBZ) and TO-92 (LPG) packages.
Applications
- Fluid Flow Rate Measurement: Can be used to measure fluid flow rates by detecting the rotation of a magnet attached to a flow meter.
- Medical Devices: Suitable for use in medical devices that require precise position sensing.
- Absolute Angle Encoding: Ideal for applications requiring accurate angle measurement.
- Current Sensing: Can be used to sense current by detecting the magnetic field generated by the current flow.
Q & A
- What is the operating voltage range of the DRV5055A4QDBZT?
The DRV5055A4QDBZT operates from either 3 V to 3.63 V or 4.5 V to 5.5 V.
- What is the typical power-on time for the DRV5055A4QDBZT?
The typical power-on time is 330 µs.
- What is the sensing bandwidth of the DRV5055A4QDBZT?
The sensing bandwidth is 20 kHz.
- How does the DRV5055A4QDBZT handle temperature compensation?
The device includes magnet temperature compensation to adjust sensitivity with temperature changes, ensuring linear performance across a wide temperature range.
- What are the available package options for the DRV5055A4QDBZT?
The device is available in SOT-23 (DBZ) and TO-92 (LPG) packages.
- What is the quiescent voltage of the DRV5055A4QDBZT when no magnetic field is present?
The quiescent voltage is half of VCC when no magnetic field is present.
- How does the DRV5055A4QDBZT reduce noise?
Noise can be reduced by using an RC filter if the full device bandwidth is not needed.
- What is the linear magnetic sensing range of the DRV5055A4QDBZT at 3.3 V and 25°C?
The linear magnetic sensing range is ±176 mT.
- What are some common applications of the DRV5055A4QDBZT?
Common applications include fluid flow rate measurement, medical devices, absolute angle encoding, and current sensing.
- How does the DRV5055A4QDBZT ensure mechanical stress cancellation?
The device features integrated mechanical stress cancellation circuits to ensure accurate measurements.
