Image sensor and test system and method therefor

摘要

An image sensor includes a plurality of pixels each coupled to a respective analog-to-digital converter via a respective line. The image sensor also includes a first pad and a second pad. The first pad is coupled an external tester that applies a bias voltage on the respective line via the first pad. The second pad outputs the respective code corresponding to the bias voltage from the respective analog-to-digital converter to the external tester.