SNOSDC3D June 2021 – July 2022 TLV3601-Q1 , TLV3602-Q1 , TLV3603-Q1

PRODMIX

- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information

- DCK|5

For the TLV3603-Q1, the hysteresis vs. resistance curve (Figure 8-2) can be used as a guidance to set the desired amount of hysteresis. Figure 8-2 shows that for a 30-mV hysteresis, a 150 kΩ resistor must be placed from the LE/HYS pin to VEE.

For the TLV3601-Q1 and TLV3602-Q1, the following procedure can be used to add external hysteresis for a non-inverting configuration. Note that V_{HYST} << V_{REF}, so V_{HYST} can be ignored and is not included in the following equations for simpler calculation.

The equivalent resistor networks when the output is high and low are shown in Figure 8-7.

When V_{IN} is less than V_{REF}, the output is low. For the output to switch from low to high, V_{IN} must rise above the V_{H} threshold. Use Equation 1 to calculate V_{H}.

Equation 1. V_{H} = (R1 x V_{REF}/R2) + V_{REF}

When V_{IN} is greater than V_{REF}, the output is high. For the comparator to switch back to a low state, V_{IN} must drop below the V_{L} threshold. Use Equation 2 to calculate V_{L}.

Equation 2. V_{L} = [V_{REF} (R1 + R2) - V_{CC} x R1] / R2

The hysteresis of this circuit is the difference between V_{H} and V_{L}, as shown in Equation 3.

Equation 3. ΔV_{IN} = V_{HYS} = (V_{CC} x R1/R2)

Select a value for R2. Plug in given values for V_{CC}, V_{REF}, V_{H}, and V_{L}**.** For the given example, R2 = 10 kΩ, and R1 is solved as 60 Ω.

For more information, please see Application Notes SNOA997 "Inverting Comparator with Hysteresis Circuit", SBOA313 "Non-Inverting Comparator With Hysteresis Circuit", SBOA219 "Comparator with and without hysteresis circuit".