HV7370

HV7370 Quad, High Speed, ±100V 850mA, Ultrasound Damper Features ► ► ► ► ► ► ► HVCMOS® technology for high performance High density integration ultrasound transmitter 0 to ±100V open-drain voltage ±850mA source and sink current Up to 20MHz operation frequency Matched delay times 1.8 to 5V CMOS logic interface General Description The Supertex HV7370 is a four-channel, monolithic high voltage, high-speed damper. It is designed for working with the HV738, HV748 or HV758 for medical ultrasound waveform generators requiring fast return-to-zero applications. The HV7370 consists of a controller logic interface circuit, level translators, MOSFET gate drives and high current power Pchannel and N-channel MOSFETs as the output stage for each channel. The output stages of each channel are designed to provide peak output currents of over ±0.85A for damping to ground, with up to ±100V swing. The control from inputs to outputs uses direct coupling topology, which not only saves components and PCB layout space, but also makes the damping frequency function down to DC. Applications ► ► ► ► Medical ultrasound imaging Piezoelectric transducer drivers NDT ultrasound transmission Pulse waveform generator Block Diagram +1.8 to 3.3V +9.0V +75V VPP -9.0V 0 to +75V C1 VLL OTP EN MC0 MC1 PIN1 (+Pulse) NIN1 (-Pulse) EN_PWR C2 VDD C3 VSUB SUB C4 VPF VPP C5 RGND RP1 P-Driver TXP1 D1 D2 Level Trans. Level Trans. Pulser N-Driver RN1 Supertex HV748 1 of 4 Channels TXN1 RGND HVOUT1 GREF +...