HV739DB1

The HV739DB1 is a monolithic single channel, high-speed, high voltage, ultrasound transmitter pulser. This integrated, high performance circuit is in a single, 5x5mm, 32-lead QFN package.

The HV739DB1 can deliver up to a ±3.0A source and sink current to a capacitive transducer. It is designed for the ultrasound material inspection NDT and medical ultrasound imaging applications. It can also be used as a high voltage driver for other piezoelectric or capacitive MEMS transducers, or for ATE systems and pulse signal generators as a signal source.

HV739DB1's circuitry consists of controller logic circuits, level translators, gate driving buffers and a high current and high voltage MOSFET output stage. The output stages of each channel are designed to provide peak output currents over ±3.0A for pulsing, with up to ±100 volt swings. Two fl oating 12VDC power supplies referenced to VPP and VNN supply the P- and N-type power FET gate drivers. The upper limit frequency of the pulser waveform is 35MHz depending on the load capacitance. The HV739 can also be used as a damping circuit to generate fast return-to-zero waveforms by working with another HV739 as a pulsing circuit. It also has built-in under-voltage and over-temperature protection functions.