1.3.2 Differential Voltage Monitor

The differential voltage monitor uses the same components as the current monitor.

The differential voltage monitor in Fusion measures the differential voltage between a pair of Voltage and Current Input channels. This peripheral requires two channels, one of type V and one of type C, and they must be on adjacent package pins.

The differential amp gain in the differential voltage monitor is 10x. The differential amplifier measures the potential/voltage drop (256 mV max if the reference is 2.56V) across the two inputs.

The voltage channel in the pair can be used as a voltage monitor to measure the actual voltage that is connected to the Voltage channel.

For more information on the digital filtering factor, Acquisition time, and Comparison Flag Specifications. refer to the Configuring Current, Differential Voltage, Temperature, and Voltage Peripherals section.

Polarity - The polarity of the peripheral can be set to Positive or Negative. The associated Voltage values must match this polarity. The ASB returns a warning if the voltage values do not match. When you select a negative polarity, the prescaler option on the associated Voltage Monitor defaults to the "Prescaler" path.

Maximum voltage - The maximum anticipated voltage measured by this Voltage Monitor peripheral pad. The range is -10.5V to +16V (the voltage range is NOT bipolar). The ADC is capable of measuring a voltage range of 0 - Vref. For the Internal voltage reference, this value is 2.56V. ASB automatically configures the prescaler in the Analog Block for this peripheral to maximize the available voltage range.