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HV738K6-G M933

Description
RF front end 4ch high speed ultrasound pulser
CategoryTopical application    Wireless rf/communication   
File Size553KB,8 Pages
ManufacturerSupertex
Environmental Compliance
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HV738K6-G M933 Overview

RF front end 4ch high speed ultrasound pulser

Supertex inc.
Four-Channel, High Speed, ±65V 750mA
Ultrasound Pulser
HV738
Features
HVCMOS technology for high performance
High density integration ultrasound transmitter
0 to ±65V output voltage
±750mA source and sink current in Pulse mode
±110mA source and sink current in CW mode
Up to 20MHz operating frequency
Matched delay times
1.2 to 5.0V CMOS logic interface
Built-in output drain bleed resistors
General Description
The Supertex HV738 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 HV738 consists of a controller logic interface circuit, level
translators, MOSFET gate drivers 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 ±1.1A for pulsing, when in mode 4, with up to
±65 volt swings. When in mode 1, all the output stages drop the
peak current to ±140mA 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 8.0VDC power
supplies referenced 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.
Application
Portable medical ultrasound imaging
Piezoelectric transducer drivers
NDT ultrasound transmission
Pulse waveform generator
Typical Application Circuit
+1.5 to 2.5V
C1
VLL VDD
OTP
EN
MC0
MC1
PIN1
EN_PWR
SUB
RGND
R
P1
TXP1
TXN1
NIN1
+8.0V
C2
C3
+65V VPP -8.0V
C4
VSUB
VPF
0 to +65V
C5
VPP
+1.5 to 2.5V
Logic
Level
Translator
P-Driver
D1
HV
OUT
1
D2
Level
Translator
N-Driver
R
N1
RGND
X1
1 of 4 Channels
GREF
VSS
HV738
VNF
C7
V
NN
+8V
VNN
C6
0 to -65V
Supertex inc.
1235 Bordeaux Drive, Sunnyvale, CA 94089
Tel: 408-222-8888
www.supertex.com

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