TIDUBY9
December 2021
Description
Resources
Features
Applications
5
1
System Description
1.1
Key System Specifications
2
System Overview
2.1
Block Diagram
10
2.2
Highlighted Products
2.2.1
DRV5056
2.2.2
DRV5032
2.2.3
TPS709
2.2.4
SN74HCS00
2.2.5
TPS22917
2.2.6
SN74AUP1G00
2.2.7
TLV9061
2.3
Design Considerations
2.3.1
Design Hardware Implementation
2.3.1.1
Hall-Effect Switches
2.3.1.1.1
U1 Wake-Up Sensor Configuration
2.3.1.1.2
U2 Stray-Field Sensor Configuration
2.3.1.1.3
U3 and U4 Tamper Sensor Configuration
2.3.1.1.4
Hall Switch Placement
2.3.1.1.4.1
Placement of U1 and U2 Sensors
2.3.1.1.4.1.1
U1 and U2 Magnetic Flux Density Estimation Results
2.3.1.1.4.2
Placement of U3 and U4 Hall Switches
2.3.1.1.4.2.1
U3 and U4 Magnetic Flux Density Estimation Results
2.3.1.1.5
Using Logic Gates to Combine Outputs from Hall-Effect Switches
2.3.1.2
Linear Hall-Effect Sensor Output
2.3.1.2.1
DRV5056 Power
2.3.1.2.2
DRV5056 Output Voltage
2.3.1.2.3
DRV5056 Placement
2.3.1.3
Power Supply
2.3.1.4
Transistor Circuit for Creating High-Voltage Enable Signal
2.3.2
Alternative Implementations
2.3.2.1
Replacing 20-Hz Tamper Switches With 5-Hz Tamper Switches
2.3.2.2
Using Shielding to Replace Tamper Switches and Stray Field Switch
2.3.2.3
Replacing Hall-Based Wake-Up Alert Function With a Mechanical Switch
3
Hardware, Software, Testing Requirements, and Test Results
3.1
Hardware Requirements
3.1.1
Installation and Demonstration Instructions
3.1.2
Test Points and LEDs
3.1.3
Configuration Options
3.1.3.1
Disabling Hall-Effect Switches
3.1.3.2
Configuring Hardware for Standalone Mode or Connection to External Systems
3.2
Test Setup
3.2.1
Output Voltage Accuracy Testing
3.2.2
Magnetic Tampering Testing
3.2.3
Current Consumption Testing
3.3
Test Results
3.3.1
Output Voltage Accuracy Pre-Calibration Results
3.3.2
Output Voltage Accuracy Post-Calibration Results
3.3.3
Magnetic Tampering Results
3.3.4
Current Consumption Results
4
Design and Documentation Support
4.1
Design Files
4.1.1
Schematics
4.1.2
BOM
4.2
Tools and Software
4.3
Documentation Support
4.4
Support Resources
4.5
Trademarks
Features
Up to 10 mm of trigger displacement translated to voltage
Measured voltage error without calibration
< 3%
Measured voltage error with calibration < 0.5%
(Optional) Disables voltage output when strong external magnetic fields are detected
Operates from AAA batteries or 5 V to 30 V external power supply
Low system current consumption in sleep mode
Maximum protection against external magnetic fields selected: 6.9 µA
Minimum protection against external magnetic fields selected: 3.5 µA