SBAU375 November 2021
The analog input to the AMC23CxxEVM board can be applied directly to the three-wire screw terminal J4.
Table 4-1 summarizes the details of J2.
| Pin Number | Signal | Description |
|---|---|---|
| J4.1 | IN/IN+ | Single-ended comparator input or positive differential comparator input (AMC23C10 only) to the AMC23Cxx device (pin 2) |
| J4.2 | REF/IN– | Comparator reference input or negative differential comparator input (AMC23C10 only) to the AMC23Cxx device (pin 3) |
On the AMC23C14EVM, AMC23C12EVM, and AMC23C11EVM, the resistor R7 is used to set the external comparator reference voltage, VREF. By default R7 has a value of 2.55 kΩ, which sets a VREF of 255 mV when combined with the internal 100-μA current source of the AMC23Cxx device.