Calculation tool
Data sheet
DRV425-Q1
- AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, TA
- Functional Safety-Capable
- High-precision, integrated fluxgate sensor:
- Offset: ±8 µT (max)
- Offset drift: ±5 nT/°C (typ)
- Gain error: 0.04% (typ)
- Gain drift: ±7 ppm/°C (typ)
- Linearity: ±0.1%
- Noise: 1.5 nT/√Hz (typ)
- Sensor range: ±2 mT (max)
- Range and gain adjustable with external resistor
- Selectable bandwidth: 47 kHz or 32 kHz
- Precision reference:
- Accuracy: 2% (max), drift: 50 ppm/°C (max)
- Pin-selectable voltage: 2.5 V or 1.65 V
- Selectable ratiometric mode: VDD / 2
- Diagnostic features: Overrange and error flags
- Supply voltage range: 3.0 V to 5.5 V
The DRV425-Q1 automotive device is designed for single-axis magnetic field-sensing applications, and enables electrically-isolated, high-sensitivity, and precise dc- and ac-field measurements. The device provides the unique and proprietary, integrated fluxgate sensor (IFG) with an internal compensation coil to support a high-accuracy sensing range of ±2 mT, with a measurement bandwidth of up to 47 kHz. The low offset, offset drift, and noise of the sensor, combined with the precise gain, low gain drift, and very low nonlinearity provided by the internal compensation coil, result in unrivaled magnetic field measurement precision.This high level of sensitivity and accuracy enables more current measurements in high-current busbar applications, such as traction inverters or battery-management systems. Torque sensor or motor diagnostic systems can benefit from the ability to precisely measure the position or displacement of a magnetic field. The output of the DRV425-Q1 is an analog signal proportional to the sensed magnetic field.
The device offers a complete set of features, including an internal difference amplifier, on-chip precision reference, and diagnostic functions to minimize component count and system-level cost.
The device is available in a thermally-enhanced, nonmagnetic, thin WQFN package, with a thermal pad for optimized heat dissipation, and is specified for operation over the automotive temperature range of –40°C to +125°C.
Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | DRV425-Q1 Automotive, Integrated Fluxgate Magnetic-Field Sensor datasheet (Rev. A) | PDF | HTML | 24 Apr 2020 |
| E-book | An Engineer's Guide to Current Sensing (Rev. B) | 12 Apr 2022 | ||
| Functional safety information | DRV425-Q1 Functional Safety FIT Rate, Failure Mode Distribution and Pin FMA | 23 Mar 2020 | ||
| Application brief | Fluxgate for Motor Diagnostics | 21 Dec 2017 | ||
| White paper | Achieve greater precision, reliability with magnetic sensing technology | 26 Jun 2017 | ||
| Application brief | Design Considerations for Dual DRV425 Bus Bar Application | 30 Mar 2017 | ||
| Application note | Bus Bar Theory of Operation | 08 Nov 2016 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
DRV425-BUSBAR-EVM — ±100A Bus Bar Current Sensor using Open-Loop Fluxgate Sensors Reference Design Evaluation Assembly
The DRV425-BUSBAR-EVM is a complete bus bar assembly that is a non-invasive (isolated) current measurement solution up to ±100A. This assembly includes bus bar with a circular cutout, insert, PCB, isolated standoffs, terminal blocks, and interface cable assembly to enable high current (...)
Evaluation board
DRV425EVM — DRV425 Open Loop Magnetic Field Sensing Evaluation Module
The DRV425EVM is an evaluation platform for the DRV425, a complete analog front end IC and coil driver for open loop magnetic field sensing applications. The DRV425EVM allows the user to explore all the features of the DRV425 device.
User guide: PDF
Calculation tool
SLOC331 — DRV425 System Parameter Calculator
Supported products & hardware
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WQFN (RTJ) | 20 | Ultra Librarian |
Ordering & quality
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