JAJSG25B August 2018 – April 2020 AMC1035
PRODUCTION DATA.
The AMC1035 system clock is provided externally at the CLKIN pin. The clock signal must be applied continuously for proper device operation.
To support the bipolar input voltage range with a single supply, the AMC1035 includes a charge pump. This charge pump stops operating if the clock signal is below the specified frequency range or if the signal is paused or missing. Additionally, the input bias current increases beyond the specified range and significantly reduces the input resistance of the device. When the clock signal is paused or missing, the modulator stops the analog signal conversion and the digital output signal remains frozen in the last logic state. When the clock signal is applied again after a pause, the internal analog circuitry biasing must settle for proper device performance. In this case, consider the tASTART specification in the Switching Characteristics table.