SBOSAJ4 June 2024 TLV9304-Q1
PRODMIX
This noninverting comparator circuit applies the input voltage (VIN) to the noninverting terminal of the op amp. Two resistors (R1 and R2) divide the supply voltage (V+) to create a mid-supply threshold voltage (VTH) as calculated in Equation 1. Figure 7-1 shows the circuit. When VIN is less then VTH, the output voltage transitions to the negative supply and equals the low-level output voltage. When VIN is greater than VTH, the output voltage transitions to the positive supply and equals the high-level output voltage.
In this example, resistor 1 and 2 reach 100kΩ, which sets the reference threshold at 20V. However, resistor 1 and 2 can be adjusted to modify the threshold using Equation 1. The values of resistors 1 and 2 were selected to reduce power consumption, but these values can be further increased to reduce power consumption, or reduced to improve noise performance.