SBOS729B
October 2015 – October 2025
DRV425
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
Fluxgate Sensor Front-End
6.3.1.1
Fluxgate Sensor
6.3.1.2
Bandwidth
6.3.1.3
Differential Driver for the Internal Compensation Coil
6.3.1.4
Magnetic Field Range, Overrange Indicator, and Error Flag
6.3.2
Shunt-Sense Amplifier
6.3.3
Voltage Reference
6.3.4
Low-Power Operation
6.4
Device Functional Modes
7
Application and Implementation
7.1
Application Information
7.2
Typical Applications
7.2.1
Linear Position Sensing
7.2.1.1
Design Requirements
7.2.1.2
Detailed Design Procedure
7.2.1.3
Application Curves
7.2.2
Current Sensing in Busbars
7.2.2.1
Design Requirements
7.2.2.2
Detailed Design Procedure
7.2.2.3
Application Curves
7.3
Power Supply Recommendations
7.3.1
Power Supply Decoupling
7.3.2
Power-On Start-Up and Brownout
7.3.3
Power Dissipation
7.3.3.1
Thermal Pad
7.4
Layout
7.4.1
Layout Guidelines
7.4.2
Layout Example
8
Device and Documentation Support
8.1
Documentation Support
8.1.1
Related Documentation
8.2
Receiving Notification of Documentation Updates
8.3
Support Resources
8.4
Receiving Notification of Documentation Updates
8.5
Support Resources
8.6
Trademarks
8.7
Electrostatic Discharge Caution
8.8
Glossary
9
Revision History
10
Mechanical, Packaging, and Orderable Information
1
Features
High-precision, integrated fluxgate sensor:
Offset: ±8µT (max)
Offset drift: ±5nT/°C (typ)
Gain error: 0.04% (typ)
Gain drift: ±7ppm/°C (typ)
Linearity: ±0.1%
Noise: 1.5nT/√
Hz
(typ)
Sensor range: ±2mT (max)
Range and gain adjustable with external resistor
Selectable bandwidth: 47kHz or 32kHz
Precision reference:
Accuracy: 2% (max), drift: 50ppm/°C (max)
Pin-selectable voltage: 2.5V or 1.65V
Selectable ratiometric mode: VDD / 2
Diagnostic features: Overrange and error flags
Supply voltage range: 3.0V to 5.5V