JAJSKM6 november 2020 TLV6700-Q1
PRODUCTION DATA
Use Equation 1 through Equation 4 to calculate the resistor divider values and target threshold voltages.
Select a value for RT such that the current through the divider is approximately 100 times higher than the input current at the INA+ and INB– terminals. The resistors can have high values to minimize current consumption as a result of low-input bias current without adding significant error to the resistive divider. See the application note Optimizing Resistor Dividers at a Comparator Input (SLVA450) for details on sizing input resistors.
Use Equation 2 to calculate the value of R3.
where:
VMON(OV) is the target voltage at which an overvoltage condition is detected
Use Equation 3 or Equation 4 to calculate the value of R2.
where:
VMON(no UV) is the target voltage at which an undervoltage condition is removed as VMON rises
where:
VMON(UV) is the target voltage at which an undervoltage condition is detected
The worst-case tolerance can be calculated by referring to Equation 13 in application report SLVA450, Optimizing Resistor Dividers at a Comparator Input (available for download at www.ti.com). An example of the rising threshold error, VMON(OV), is given in Equation 5.