STMicroelectronics STHV800 High-speed Ultrasound Pulser
STMicroelectronics STHV800 is an octal, monolithic, high-voltage and high-speed pulse generator. It is designed for medical ultrasound applications, but can be used for other piezoelectric, capacitive or MEMS transducers. The device integrates a controller logic interface circuit (compatible with both 1.8V and 3.3V input signals), level translators, MOSFET gate drivers, noise blocking diodes, and high power P-channel and N-channel MOSFETs as the output stage for each channel. These MOSFETs are capable of providing more than 2A of peak output current. In addition, the STHV800 includes self-biasing circuitry which allows very low power consumption during the RX phase (down to 200µW global power dissipation) and thermal shutdown block sensing by an external dedicated pin (THSD). One of the main benefits of the STHV800 is that it requires very few external components: only decoupling capacitors on the HV and LV supplies, and a resistor to pull up the THSD pin.