MP4835A 32-Channel High-Voltage SPST Analog Switch

The Monolithic Power Systems MP4835A is a 32-channel, high-voltage, single-pole/single-throw (SPST) analog switch with integrated output bleed resistors, designed for medical ultrasound imaging applications. It is designed to multiplex the transmission and can receive voltages to and from multiple piezoelectric transducers (PZTs).

The output switches are controlled by a 32-bit serial shift register, followed by a 32-bit data latch. The data out (DOUT) pin is provided to allow multiple devices to be cascaded. This helps minimize the number of input/output (I/O) control lines. A logic high signal in the data latch turns the corresponding analog switch on, whereas a logic low signal turns it off.

The MP4835A does not require any high-voltage supplies. Only two low-voltage supplies are required (3.3 V and 5 V). The analog switch can block or pass analog voltages up to ±100 V with peak currents of up to ±1.8 A. The MP4835A is available in a QFN-72 (10 mm x 10 mm) package.