Patent ID: 7511507

Claim:
An integrated circuit, comprising: an analog output circuit for outputting an analog signal; a leadless terminal, which is positioned on the back of a package, and upon mounting onto a circuit board, is hidden from outside, for connecting an output line of the analog output circuit to said circuit board by soldering; and a measuring unit for measuring an analog output voltage of the leadless terminal in a state of soldering connection to said circuit board, wherein said measuring unit comprises: a switching unit for obtaining a failure diagnosis state upon failure diagnosis by connecting the output line of the analog output circuit to the measuring unit; and an AD converter for measuring the analog output voltage of the leadless terminal in the failure diagnosis state obtained by the switching unit, wherein said measuring unit transfers the measured analog output voltage of the leadless terminal from the AD converter to an outside determination unit; and said switching unit comprises a first switching unit for connecting the output line of the analog output circuit which is a target of diagnosis to the AD converter upon failure diagnosis, and a second switching unit for connecting the output line of the analog output circuit which is the target of diagnosis of the leadless terminal.