SLYU050B June   2020  – July 2021 TMAG5110 , TMAG5110-Q1 , TMAG5111 , TMAG5111-Q1

 

  1.   Trademarks
  2. 1Overview
    1. 1.1 Kit Contents
    2. 1.2 Related Documentation From Texas Instruments
  3. 2Hardware
    1. 2.1 Features
  4. 3Operation
    1. 3.1 Quick Start Setup
    2. 3.2 EVM Operation
  5. 4Circuitry
    1. 4.1 Power Block
    2. 4.2 Hall Device Block
      1. 4.2.1 TMAG5110 Side
      2. 4.2.2 TMAG5111 Side
    3. 4.3 Quadrature Decoder Block
      1. 4.3.1 TMAG5110 Side
      2. 4.3.2 TMAG5111 Side
    4. 4.4 Up/Down Counter Block
      1. 4.4.1 TMAG5110 Side
      2. 4.4.2 TMAG5111 Side
    5. 4.5 LED Array Decoder Block
      1. 4.5.1 TMAG5110 Side
      2. 4.5.2 TMAG5111 Side
  6. 5Schematics, PCB Layout, and Bill of Materials
    1. 5.1 Schematics
    2. 5.2 PCB Layout
    3. 5.3 Bill of Materials
  7. 6Revision History

3.2 EVM Operation

The TMAG5110-5111EVM features two functionally independent circuits, one for the TMAG5110 and one for the TMAG5111. Figure 3-1 shows an overview of the PCB layout. The circuit on the left features the TMAG5110 quadrature output device, and the circuit on the right features the TMAG5111 speed and direction output device. Section 4 goes over the different operational section blocks of the EVM and their functions and components.

For TMAG5110 each output is a logic high or low based on the latch state of the individual internal Hall sensors. So, for this case, OUT1 is for the Z-axis sensor and OUT2 is for the Xaxis sensor.

For TMAG5111, as the magnet is rotated, OUT1 will indicated speed and OUT2 will indicate direction. Direction can be determined by observing whether this output is high or low, and Speed is indicated by the rate of output transitions.

Figure 3-1 EVM Overview

Figure 3-2 shows how the magnetic viewing film included with the EVM kit can be used to tell the difference between the 10 pole and 20 pole magnets. In Figure 3-2, the 10 pole magnet is on the left and the 20 pole magnet is on the right.

Figure 3-2 Magnetic Viewing Film

The EVM features two convenient magnet placement orientation options for rotary encoding, shown in Figure 3-3. The magnets can easily be rotated while in these positions. The two LED arrays at the bottom (D1–D10 and D11-D20) will each have one LED lit up either green or blue that will move either right or left with the rotation of the magnet. The output LEDs near the sensors (D21-D24) show the state of the individual output pins of each device.

Figure 3-3 EVM Magnet Placement Options

Additional magnet placement options are possible when using the rotating position module included with this EVM kit, shown in Figure 3-4 and Figure 3-5. Note that this fixture swivels from side to side to show the design and alignment flexibility of the TMAG5110 and TMAG5111. To attach the module, insert the rod into the center hole of the EVM, and tighten the nut while holding the module in the desired position. To swivel the fixture, loosen the nut slightly.

Figure 3-4 Position Module Standard Placement
Figure 3-5 Position Module Rotated Placement

The included magnets should not be placed near stronger magnets, or the magnetic pole configuration may get altered. It is best practice not to touch the multipole ring magnets to any other magnet.