SLYA093 September   2025 TMAG3001 , TMAG5253

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Benefits of Hall-Effect Sensors
    1. 2.1 Hall-Effect Sensors for Keys
    2. 2.2 3D Hall-Effect Sensors for Knobs
  6. 3Keypress Design Considerations
    1. 3.1 Simulating Keypress Design
    2. 3.2 Keypress Bench Results
  7. 4Keyboard Design Example
  8. 5Summary
  9. 6References

6 References

  1. Texas Instruments, 3D Hall-Effect Sensor for Knobs in Appliances, application note.
  2. Texas Instruments, Angle Measurement with Multi-Axis Hall-Effect Sensors, application note.
  3. Texas Instruments, TMAG5253 Low-Power Linear Hall Effect Sensor With EN Pin in Ultra-Small Package, data sheet.
  4. Texas Instruments, TMAG3001 Low-Power 3D Linear and Angle Hall-Effect Sensor With I2C Interface and Wake Up Detection in WCSP, data sheet.
  5. Texas Instruments, TMAG3001 evaluation module for three-axis linear Hall-effect sensor with I²C and programmable switch, user's guide.
Table 6-1 Table . Device Recommendation
Device Characteristics Design Considerations
TMAG5253 Low-power linear Hall-effect sensor with enable pin in X2SON package Measures magnetic field strength on Z-axis and reports data via ADC output. Enable pin allows for multiple devices to share the same ADC pin and disable devices that are not being used to reduce system current consumption.
DRV5055 Linear Hall-effect sensor in SOT23 or TO-92 package Measures magnetic field strength on Z-axis and reports data via ADC output.
TMAG5231 Low-power Hall-effect switch in SOT23 or X2SON package Measures magnetic field strength on Z-axis and pulls high/low (depending on the variant) when BOP is crossed. Useful when only an on/off response is required.
TMAG3001 Low-power 3D linear and angle Hall-effect sensor with I2C interface and wake up detection in YBG package. Measures magnetic field strength on X, Y, and Z axes and has an internal CORDIC to calculate angle. Offers a wakeup and sleep mode to allow for sampling while reducing average current consumption.