9.2.3 What To Do and What Not To Do

Do not leave the inputs of the AMC1304 unconnected (floating) when the device is powered up. If both modulator inputs are left floating, the input bias current drives them to the output common-mode of the analog front end of approximately 2 V that is above the specified input common-mode range. As a result, the front gain diminishes and the modulator outputs a bitstream resembling a zero input differential voltage.