TLV7041 datasheet(28/69 Pages) TI2

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7.2.4.2 Detailed Design Procedure

First, choose a target range of hysteresis vlaue to achieve. For this design example, 50mV of hysteresis is

chosen as the target. Since the TLV7032 already has 10mV (typ) of internal hysteresis, the voltage output from

the TMR Rotation Sensor must be scaled down by a factor of 5. This way, the 10mV of internal hysteresis gets

scaled up by a factor of 5, resulting in 50mV of hysteresis. The minimum output HIGH level for the TMR Rotation

Sensor used in Figure 47 is 5.25V. Since 5.25V is the minimum output high value, this can be used to substitute

VIN from the Voltage Divider Equation in Figure 48. Since the voltage from the TMR rotation sensor needs to be

scaled down by a factor of 5, the equation in Figure 48 can be rewritten as:

The above equation can be solved for using standard resistor values, where R1 = 100kΩ, and R2 = 24.9kΩ. The

minimum voltage seen at the noninverting pins of the comparator when the output is HIGH is 1.05V. To make the

device transition at 50% output high level, the inverting pins of the TLV7032 must be tied to a 0.525V reference.

7.2.4.3 Application Curve

Figure 49 shows the TLV7032 achieving approximately 50mV of hysteresis using the following component

values:

• R1 = 100kΩ

• R2 = 24.9kΩ

• VREF (IN-) = 0.525V

Figure 7-12. DC Input Voltage Sweep

TLV7031, TLV7032, TLV7041, TLV7042, TLV7034, TLV7044

SLVSE13J – SEPTEMBER 2017 – REVISED NOVEMBER 2024

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TLV7041 Datasheet(PDF) 28 Page - Texas Instruments