The EV4832A-RD-00A is an evaluation board for the MP4832A, a high-voltage, 32-channel analog switch. The MP4832A is designed for medical ultrasound applications. It can also be used for non-destructive tests (NDTs) as the application is very similar to medical ultrasound.

The high-voltage analog switches are used to multiplex the transmitter and receiver circuitries to different piezoelectric transducer (PZT) elements. The MP4832A has a resistor to ground on the output pins, SWout. This helps ensure that there is no significant DC voltage built up across the PZT element. The switches can be turned on or off via a serial 32-bit shift register. The serial control interface helps minimize the number of input/output (I/O) connections.