Supertex has introduced the MD2131, an arbitrary waveform push-pull source driver for diagnostic medical and HIFU (high intensity focused ultrasound) applications. The IC can be used in non-destructive image evaluation, metal flaw detection, and piezoelectric transducer waveform drivers. It consists of CMOS digital logic inputs, an 8bit DAC and a serial peripheral interface. The output stage is designed to be the source driver for the company's DN2625, a depletion-mode, N-channel, 250V MOSFET. Paired with this MOSFET, the IC is claimed to excel as a high performance ultrasound beamformer when used with a tightly coupled RF pulsed current transformer. The company claims that the chipset provides accurate beamforming and focus scanning for diagnostic and therapeutic ultrasound applications. The driver is in a 40-lead QFN package.
