TLV7031 datasheet(27/69 Pages) TI2

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7.2.4 Quadrature Rotary Encoder

A quadrature encoder for rotary motors/shafts utilizing a Tunneling Magnetoresitance (TMR) Rotation Sensor

can track the position of the motor shaft even when power is turned off, while the TLV7032 provides additional

hysteresis to prevent unwanted output toggling between quadrants. The TLV7032 can be used with other

sensing techniques as well, such as optical, capacitive, or inductive.

Figure 7-10. Quadrant Encoder Detector

7.2.4.1 Design Requirements

TMR Rotation Sensors general have two digital, binary outputs that are 90 degrees out of phase. The TLV7032

can be used to provide additional hysteresis maintains there is not any unwanted toggling of the output when

the sensors are between the transition points of two quadrants. The TLV7032 already provides 10mV of typical

internal hysteresis. By dividing down the output voltage from the rotation sensor using a voltage divider, the

internal hysteresis scales up by the same voltage divider ratio.

Figure 7-11. Voltage Divider Equation

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TLV7031, TLV7032, TLV7041, TLV7042, TLV7034, TLV7044

SLVSE13J – SEPTEMBER 2017 – REVISED NOVEMBER 2024

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TLV7031 Datasheet(PDF) 27 Page - Texas Instruments