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

4.3.1 TMAG5110 Side

U2 is the LS7184N-S, which is a quadrature encoder to counter interface chip. This chip converts the outputs of the TMAG5110 to use directly with an up/down counter by outputting a speed pulse and a direction. Pin 6 is left floating to put the device in x4 mode, which gives a speed pulse for both rising and falling edges of each output from the TMAG5110. R5 is the RBIAS resistor which is used to adjust the output clock pulse width TOW. In this case, 470 kΩ was used to set approximately 5.5-µs TOW. C2 is a bypass capacitor that is placed near the IC to help mitigate power supply noise and provide current quickly to the device when needed.