Another ADC that is useful in motor control applications is the AD7400 isolated sigma-delta modulator. This ADC can be used to monitor the current going to the motor or the bus voltage on the power stage for a motor control application. The output of the AD7400 is a series of isolated 1’s and 0’s. When this serial data is put into a digital filter 16 bit resolution can be achieved. The AD7400A is also available with improved linearity and −40°C to +125°C operating range in an 8 lead gull wing package.