HV7331 Supertex inc. Four Channel, High Speed 70V 2.0A Ultrasound RTZ Pulser Features General Description HVCMOS technology for high performance The Supertex HV7331 is a four-channel, monolithic, high voltage, High density integrated ultrasound transmitter high speed pulse generator with built in fast return to zero damping 0 to 70V output voltage FETs. This high voltage and high-speed integrated circuit is 2.0A source and sink minimum pulse current designed for portable medical ultrasound imaging devices, and can Up to 20MHz operation frequency also be used for NDT applications. 2.5ns matched delay times 2.5 to 5.0V CMOS logic interface The HV7331 consists of a controller logic interface circuit, level Built-in output drain diode and bleed resistors translators, MOSFET gate drives, and high current power P-channel CW/RTZ Doppler quick switching and N-channel MOSFETs as the output stage for each channel. Two damping mode options The peak output currents of each channel are guaranteed to be over 2.0A with up to a 70V pulse swing. The integrated regulators Applications for the gate drivers not only saves two floating voltage supplies, but Portable medical ultrasound imaging also makes the PCB layout easier. The split common source for Piezoelectric transducer drivers the P or N damping MOSFETs provide pulse or CW Doppler mode NDT ultrasound transmission quick switch-over for cost and power savings. Pulse waveform generator Typical Application Circuit +2.5 to 3.3V +5.0V +5.0 to +70V VLL VDD CPF VPP V PP LRP RGND V PP V HV V PF OUT SS EN V PF 1 of 4-Channels Shown LR TX1 V NF Logic CW/RTZ V & Level NN RGND V Translator GN V NN PIN1 R NIN1 GN R GP CGP VGP +VCW AGND RGP V V DD GP CGN VGN -VCW SUB LRN VNF RGN DGND VSS VSUB CNF VNN RGND CW/RTZ -5.0V -5.0 to -70V Doc. DSFP-HV7331 Supertex inc. B011513 www.supertex.comHV7331 Pin Configuration Ordering Information / Availability 64 Part Number Package Option Packing 1 HV7331K6-G 64-Lead QFN (9.0x9.0) 260/tray -G indicates package is RoHS compliant (Green) Absolute Maximum Ratings Parameter Value 64-Lead QFN AGND, DGND and V 0V SUB (top view) V , Positive logic supply -0.5 to +5.5V LL V , Positive logic and level translator supply -0.5 to +5.5V DD Package Marking V , Negative level translator supply +0.5 to -5.5V L = Lot Number SS HV7331K6 YY = Year Sealed (V -V ) Differential high voltage supply +160V PP NN LLLLLLLLL WW = Week Sealed A = Assembler ID YYWW V , High voltage positive supply -0.5 to +80V PP C = Country of Origin AAA CCC = Green Packaging V , High voltage negative supply +0.5 to -80V NN Package may or may not include the following marks: Si or All logic input PIN , NIN , EN and CW voltages -0.5 to +5.5V X X 64-Lead QFN (V -TX ) V to TX voltage difference +160V PP n PP n (TX -V ) TX to V voltage difference +160V n NN n NN Typical Thermal Resistance (RGP - GND) RGP to GND voltage difference -0.5 to +5.5V Package ja (RGN - GND) RGN to GND voltage difference +0.5 to -5.5V O 64-Lead QFN 21 C/W Storage temperature -65 to 150C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Continuous operation of the device at the absolute rating level may affect device reliability. All voltages are referenced to device ground. Power-Up Sequence Power-Down Sequence Step Description Step Description 1 V with logic signal low 1 All logic signals go to low LL 2 V , V 2 V , V DD SS PP NN 3 V , V 3 V , V PP NN DD SS 4 Logic control signals active 4 V LL Note: Powering up/down in any arbitrary sequence will not cause any damage to the device. The powering up/down sequence is only recommended in order to minimize possible inrush current. Doc. DSFP-HV7331 Supertex inc. B011513 2 www.supertex.com