Overview
The DRV5055A2EDBZRQ1 is a ratiometric linear Hall effect sensor produced by Texas Instruments. This device is designed for accurate position sensing and operates from either 3.3V or 5V power supplies. It features a fully integrated signal conditioning circuit, temperature compensation, and mechanical stress cancellation, making it suitable for a wide range of automotive and industrial applications. The sensor outputs an analog voltage proportional to the magnetic flux density, with the output voltage referenced to VCC. This architecture helps in eliminating errors due to VCC tolerance when used with external analog-to-digital converters (ADCs) that use the same VCC as their reference.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Power Supply Voltage (VCC) | 3 | - | 5.5 | V |
| Operating Ambient Temperature (TA) | -40 | - | 150 | °C |
| Output Continuous Current (IO) | -1 | - | 1 | mA |
| Quiescent Voltage (VQ) at VCC = 5V | 2.43 | 2.5 | 2.57 | V |
| Quiescent Voltage (VQ) at VCC = 3.3V | 1.59 | 1.65 | 1.71 | V |
| Sensitivity at VCC = 5V (DRV5055A2) | 47.5 | 50 | 52.5 | mV/mT |
| Sensitivity at VCC = 3.3V (DRV5055A2) | 28.5 | 30 | 31.5 | mV/mT |
| Linear Magnetic Sensing Range (DRV5055A2) | ±42 | - | ±42 | mT |
| Output-Referred Noise (DRV5055A2) | - | - | 6 | mVPP |
| Junction-to-Ambient Thermal Resistance (RθJA) - SOT-23 | - | - | 170 | °C/W |
Key Features
- Ratiometric Linear Hall Effect Sensor: The device outputs an analog voltage proportional to the magnetic flux density, with the output voltage referenced to VCC.
- Dual Power Supply Compatibility: Operates from 3.3V or 5V power supplies.
- Temperature Compensation: Compensates for magnet temperature drift to ensure linear performance across a wide temperature range (-40°C to +150°C).
- High Accuracy and Linearity: Features sensitivity linearity error and symmetry error within specified limits to ensure accurate position sensing.
- Wire Fault Detection: Supports detection of open or shorted interconnect wires through a pull-up resistor configuration.
- Compact Packages: Available in SOT-23 (DBZ) and TO-92 (LPG) packages.
Applications
- Acceleration and Clutch Pedals: Used in automotive applications for precise position sensing.
- Torque Sensors and Gear Shifters: Employed in powertrain and transmission components for accurate measurement.
- Throttle Position and Height Leveling: Suitable for various automotive and industrial control systems.
- Absolute Angle Encoding and Current Sensing: Used in applications requiring precise angular measurement and current sensing.
Q & A
- What is the operating voltage range of the DRV5055A2EDBZRQ1?
The device operates from 3.3V to 5.5V, with two recommended operating ranges: 3V to 3.63V and 4.5V to 5.5V. - What is the typical quiescent voltage of the DRV5055A2EDBZRQ1 at VCC = 5V?
The typical quiescent voltage is 2.5V. - How does the DRV5055A2EDBZRQ1 compensate for temperature changes?
The device features temperature compensation to counteract magnet drift, ensuring linear performance across a wide temperature range (-40°C to +150°C). - What are the available package options for the DRV5055A2EDBZRQ1?
The device is available in SOT-23 (DBZ) and TO-92 (LPG) packages. - How does the ratiometric architecture benefit the device?
The ratiometric architecture scales the quiescent voltage and sensitivity linearly with the power-supply voltage, eliminating errors due to VCC tolerance when used with external ADCs. - What is the sensitivity of the DRV5055A2 at VCC = 5V?
The sensitivity is typically 50 mV/mT at VCC = 5V. - Can the DRV5055A2 detect wire faults?
Yes, the device supports wire fault detection through a pull-up resistor configuration. - What is the junction-to-ambient thermal resistance for the SOT-23 package?
The junction-to-ambient thermal resistance is 170 °C/W for the SOT-23 package. - What are some common applications of the DRV5055A2EDBZRQ1?
Common applications include acceleration and clutch pedals, torque sensors, gear shifters, throttle position, and height leveling. - How does the device handle magnetic flux direction?
The device senses magnetic flux perpendicular to the top of the package, with north and south poles producing unique voltages.
