Microchip HV7350 Handleiding

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 2016 Microchip Technology Inc.DS20005627A-page 1

HV7350

Features

• HVCMOS® Technology for High Performance

•High-density Integrated Ultrasound Transmitter

•0V to ±60V Output Voltage

•±1A Source and Sink Current in Pulse Mode

•±1A Source and Sink Current in Return-to-Zero

(RTZ) Mode

•Up to 20 MHz Operating Frequency

•Matched Delay Times

•Optional Clock Realignment

•3.3V CMOS Logic Interface and Reference

•+3.3V Low-voltage Supply for VDD

•Built-in Linear Regulators for Floating Gate

Drivers

•Built-in Output Drain Diodes and Bleed Resistors

Applications

•Portable Medical Ultrasound Imaging

•Piezoelectric Transducer Drivers

•Pulse Waveform Generator

General Description

The HV7350 is an 8-channel monolithic high-voltage

high-speed pulse generator with built-in fast return to

zero-damping FETs. This high-voltage and high-speed

integrated circuit is designed for portable medical

ultrasound imaging system.

The HV7350 consists of a controller logic interface

circuit, level translators, MOSFET gate drives, and

high-current power P-channel and N-channel

MOSFETs as the output stage for each channel.

The output peak currents of each channel are

guaranteed to be over ±1A with up to ±60V pulse

swings as well as Return-to-Zero mode. The gate

drivers for the output MOSFETs are powered by built-in

linear 5V regulators referenced to VPPand VNN. This

direct coupling topology of the gate drivers not only

saves four floating voltage supplies or AC coupling

capacitors per channel but also makes the PCB layout

smaller and easier.

An input clock pin is available to realign all the logic

input control lines to a master clock. Precise logic

timing is always essential in any ultrasound systems.

Package Type

56-lead (8 X 8) QFN

(Top view)

See Table 2-1 for pin information.

1

56

8-Channel High-Speed ±60V ±1A Ultrasound RTZ Pulser

Product specificaties