Image reading apparatus and image sensor module to suppress excessive power consumption or excessive noise

摘要

An image sensor module includes a first image reading chip and a second image reading chip. A first output circuit of the first image reading chip performs driving with multiple drive capabilities. A first output selection unit selects a first drive capability from the multiple drive capabilities and supplies a selection signal to the first output circuit. A second output circuit of the second image reading chip performs driving with one of the multiple drive capabilities. A second output selection unit selects a second drive capability from the multiple drive capabilities and supplies a selection signal to the second output circuit.