Datasheet > HV738DB1

HV738DB1

更新时间： 2024-01-09 12:49:15

品牌	Logo	应用领域
超科 - SUPERTEX		脉冲脉冲发生器
页数	文件大小	规格书
9页	1179K
描述
HV738 【65V 0.75A Ultrasound Pulser Demo Board

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HV738DB1 数据手册

HV738DB1

HV738 ±±6V ꢀ076A Ultrasound Pulser Demo Board

Introduction

Designing a Pulser with HV738

The HV738 is a monolithic four channel, high speed, high

voltage, ultrasound transmitter pulser. This integrated, high

performance circuit is in a single 7x7mm, 48-lead QFN

package.

This demo board data sheet describes how to use the

HV738DB1 to generate the basic high voltage pulse

waveform as an ultrasound transmitting pulser.

The HV738 circuit uses the DC coupling method in all

level translators. There are no external coupling capacitors

needed. The V_PPand V rail voltages can be changed

rather quickly, compared^NNto a high voltage capacitor gate

coupled driving pulser. This direct coupling topology of the

gate drivers not only saves two high voltage capacitors per

channel, but also makes the PCB layout easier.

The HV738 can deliver up to ±0.75A source and sink

current to a capacitive transducer. It is designed for

medical ultrasound imaging and ultrasound material NDT

applications. It can also be used as a high voltage driver

for other piezoelectric or capacitive MEMS transducers, or

for ATE systems and pulse signal generators as a signal

source.

The input stage of the HV738 has high-speed level

translators that are able to operate with logic signals of

1.2V to 5.0V and are optimized at 2.5V to 3.3V. In this demo

board, the control logic signals are connected to a high-

speed ribbon cable connector. The control signal logic-high

voltage should be the same as the V_CCvoltage of the demo

board, and the logic-low should be reference to GND.

HV738’s circuitry consists of controller logic circuits, level

translators, gate driving buffers and a high current and high

voltage MOSFET output stage. The output stages of each

channel are designed to provide peak output currents over

±1.1Afor pulsing, when MC0=1 and MC1=1, with up to ±±5V

swings. When in mode 1, all the output stages drop the peak

current to ±140mA for low-voltage CW mode operation to

save power. Two ﬂoating 8VDC power supplies, referenced

to V_PPand V , supply the P- and N-type power FET gate

drivers. This^NNpulser waveform’s frequency upper limit is

20 MHz depending on the load capacitance. One HV738

can also be used as four damping circuits to generate fast

return-to-zero waveforms by working with another HV738

as four pulsing circuits. It also has built-in under-voltage and

over-temperature protection functions.

The HV738DB1 output waveforms can be displayed by using

an oscilloscope probe directly connected to the test point

TX1~4 and GND. The soldering jumper can select whether

or not to connect the on-board equivalent-load, a 330pF,

200V capacitor, parallel with a 2.5kΩ, 1W resistor. Also, a

coaxial cable can be used to connect the user’s transducer

to easily drive and evaluate the HV738 transmitter pulser.

Application Circuit

+2.5V

+8V

V_PP-8V 0V to +±5V

+±5V

V_CC

V_LL

V_SUB

V_PF

V_PP

V_DD

OTP

RGND

TXP1

TXN1

MC0

MC1

Level

P-Driver

Translator

PIN1

NIN1

Logic

Control

HV_OUT

HV738

GREF

Level

Translator

N-Driver

GND

1 of 4 Channels Shown

V_NF

RGND

V_NN

V_SS

GND

V_NN+ 8V

0V to -±5V

12 3 4 5 6 7...9

中文翻译

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与HV738DB1相关器件

型号	品牌	获取价格	描述	数据表
HV738K6-G	SUPERTEX	获取价格	Quad High Speed 【65V 750mA Ultrasound Pulser
HV739	SUPERTEX	获取价格	High Speed 【100V 3.0A Ultrasound Pulser
HV739DB1	SUPERTEX	获取价格	HV739 【100V 3.0A Ultrasound Pulser Demo Board
HV746	SUPERTEX	获取价格	Dual High Speed 【75V 2.5A Ultrasound Pulser
HV746K6-G	SUPERTEX	获取价格	Dual High Speed 【75V 2.5A Ultrasound Pulser
HV748	SUPERTEX	获取价格	Quad High Speed 【75V 1.25A Ultrasound Pulser
HV748	MICROCHIP	获取价格	THIS PRODUCT IS NOT RECOMMENDED FOR NEW DESIGNS. HV748 is a four-channel, monolithic, hig
HV748DB1	SUPERTEX	获取价格	HV748 【75V 1.25A Ultrasound Pulser Demo Board
HV748K6-G	SUPERTEX	获取价格	Quad High Speed 【75V 1.25A Ultrasound Pulser
HV758	SUPERTEX	获取价格	Quad High Speed 【90V 2.2A Ultrasound Pulser

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