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HV748

4-Channel High Speed +/-75V 1.25A Ultrasound Pulser

Status: Not Recommended for new designs

Features:

  • HVCMOS technology for high performance
  • High density integration ultrasound transmitter
  • 0 to ±75V output voltage
  • ±1.25A source and sink current in pulse mode
  • ±400mA source and sink current in CW mode
  • Up to 20MHz operating frequency
  • Matched delay times
  • 1.2V to 5.0V CMOS logic interface
  • Built-in output drain bleed resistors
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Overview
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Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

THIS PRODUCT IS NOT RECOMMENDED FOR NEW DESIGNS.

HV748 is a four-channel, monolithic, high voltage, high speed pulse generator. It is designed for portable medical ultrasound applications. This high voltage and high speed integrated circuit can also be used for piezoelectric, capacitive or MEMS sensing in ultrasonic nondestructive detection and sonar ranger applications. The HV748 consists of a controller logic interface circuit, level translators, MOSFET gate drives and high power P-channel and N-channel MOSFETs as the output stage for each channel. The output stages of each channel are designed to provide peak output currents over ±1.8A for pulsing, when in mode 4, with up to ±75 volt swings. When in mode 1, all the output stages drop the peak current to ±400mA for low-voltage CW mode operation to decrease the power consumption of the IC. The P and N type of power FETs gate drivers are supplied by two floating 9.0VDC power supplies reference to VPP and VNN. This direct coupling topology of the gate drivers not only eliminates two high voltage capacitors per channel, but also makes the PCB layout easier.

Please consider this device HV7321

Additional Features
    • HVCMOS technology for high performance
    • High density integration ultrasound transmitter
    • 0 to ±75V output voltage
    • ±1.25A source and sink current in pulse mode
    • ±400mA source and sink current in CW mode
    • Up to 20MHz operating frequency
    • Matched delay times
    • 1.2V to 5.0V CMOS logic interface
    • Built-in output drain bleed resistors
Parametrics
Name
Value
# of Channels
4
Output Voltage (V)
±75
Output Current (A)
±1.25
Type
Monolithic
Package
QFN-48
Features
Built-in coupling, 4 current modes

Documents

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Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
AN-H59DB1 Demo Board
AN-H59DB1 Demo Board ( AN-H59DB1 )

The AN-H59DB1 is a high voltage DC/DC converter power supply demoboard designed to provide the required voltages needed for the HV738DB1 or HV748DB1 ultrasound transmitter demo boards.

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HV748DB1 Demo Board
HV748DB1 Demo Board ( HV748DB1 )

The HV748DB1 is used 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 VPP and VNN rail voltages can be changed rather quickly, compared to a high voltage capacitor gate coupled driving pulser. This direct coupling topology of the gate...

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
HV748K6-G
0.130000
0.769231
48
VQFN
7x7x1.0mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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