Datasheet > HV748DB1

HV748DB1

更新时间： 2024-02-11 15:20:23

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	1029K
描述
HV748 【75V 1.25A Ultrasound Pulser Demo Board

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HV748DB1 数据手册

HV748DB1

HV748 7ꢀV 1ꢁ.ꢀA Ultrasound Pulser Demo Board

Introduction

Designing a Pulser with HV748

The HV748 is a monolithic 4-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

HV748DB1 to generate the basic high voltage pulse

waveform as an ultrasound transmitting pulser.

The HV748 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 HV748 can deliver up to 1.25A 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 HV748 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.

HV748’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

1.8Afor pulsing, when MC0=1 and MC1=1, with up to 75V

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

current to 410mA for low-voltage CW mode operation to

save power. Two ﬂoating 9VDC 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 HV748

can also be used as four damping circuits to generate fast

return-to-zero waveforms by working with another HV748

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

over-temperature protection functions.

The HV748DB1 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, 1.0W resistor. Also, a

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

to easily drive and evaluate the HV748 transmitter pulser.

Application Circuit

+2.5V

+9V

V_PP-9V 0V to +75V

+75V

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

HV748

GREF

Level

Translator

N-Driver

GND

1 of 4 Channels Shown

V_NF

RGND

V_NN

V_SS

GND

V_NN+ 9V

0V to -75V

12 3 4 5 6 7...9

中文翻译

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与HV748DB1相关器件

型号	品牌	获取价格	描述	数据表
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
HV758DB1	SUPERTEX	获取价格	HV758 【90V 2.2A Ultrasound Pulser Demo Board
HV758FB	SUPERTEX	获取价格	Quad High Speed 【90V 2.2A Ultrasound Pulser
HV758FB-G	SUPERTEX	获取价格	Quad High Speed 【90V 2.2A Ultrasound Pulser
HV7620	SUPERTEX	获取价格	40MHz, 32-Channel Serial to Parallel Converter with Push-Pull Outputs
HV7620	MICROCHIP	获取价格	The HV7620 is a low-voltage serial to high-voltage parallel converter with push-pull outpu
HV7620_13	SUPERTEX	获取价格	40MHz, 32-Channel Serial to Parallel Converter with Push-Pull Outputs
HV7620DG	SUPERTEX	获取价格	40MHz, 32-Channel Serial to Parallel Converter with Push-Pull Outputs
HV7620PG	SUPERTEX	获取价格	40MHz, 32-Channel Serial to Parallel Converter with Push-Pull Outputs

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