Successive approximation analog-to-digital converter

摘要

It is described a successive approximation analog-to-digital converter (1). The analog-to-digital converter comprises a first generator (20) of a first analog value (S6) according to a configuration signal (S3), when the analog-to-digital converter is operating in a first phase (t 0 , t 1 , t 2 , t 3 , t 4 ) of a test mode, comprises a digital-to-analog converter (40) adapted to generate a second analog value (S7) according to a control signal (S1), when the analog-to-digital converter is operating in a second phase (t 5 , t 6 , t 7 , t 8 ) of the test mode, comprises a second generator (30), from the comparison of the first analog value with respect to the second analog value, of a digital value (S N ) according to a successive-approximation algorithm, when the analog-to-digital converter is operating in the second phase of the test mode. The analog-to-digital converter further comprises a controller (50) adapted to receive a signal (S4) indicating the test mode; the controller is adapted to generate in the first phase the configuration signal (S3), is adapted to receive in the second phase the digital value (S N ) and generate therefrom the control signal (S1) for controlling the generation of the second analog value according to the successive-approximation algorithm, and it is adapted to generate, from the digital value, an alarm signal (S5) indicating a failure within the analog-to-digital converter or indicating a degradation of the performance of the analog-to-digital converter.