HV732

Supertex inc. High Speed ±100V 2A Integrated Ultrasound Pulser Features ► ► ► ► ► ► ► ► ► ► HVCMOS technology for high performance 0 to ±100V output voltage ±2A source and sink current Built-in damping for RTZ waveform capability Gate-clamp for quick output amplitude ramping Up to 40MHz operation frequency ±3ns matched delay times Second harmonic is less than -40dB 1.8V to 3.3V CMOS logic interface 7x7 thermally-enhanced 44-lead QFN MCM HV732 Initial Release General Description The Supertex HV732 is a single, complete, high-voltage, high-speed, ultrasound transmitter pulser. It is designed for medical ultrasound imaging applications. The HV732 has built-in damping for faster RTZ waveform capability and high voltage MOSFET gate-clamping function for quick ramping of the output voltage amplitude. The HV732 consists of a control logic circuit, level translators, MOSFET gate drive buffers, clamp circuits, and high current, high voltage MOSFETs as the ultrasound transmitter pulser output stage. In the output stage there are two pairs of MOSFETs. Each pair consists of a P-channel and an N-channel MOSFET. They are designed to have the same impedance, and can provide peak currents of over ±2 amps. The built-in MOSFET gate driver outputs swing 0 to 12V on PDR and NDR pins. The P-channel damp output swings 0 to –5V on the DMPO pin. Application ► Medical ultrasound imaging Typical Application Circuit PDR 10nF PGATE VPP 0 to +100V TXP +12V PIN VSUB CLAMP VLL VLN EN VDD GND NIN AVDD...