HV7355 Datasheet, PDF (1/9 Pages) Supertex, Inc – Eight Channel, High Speed, Unipolar, Ultrasound Pulser 1.5A 150V

Supertex inc.
HV7355
Eight Channel, High Speed, Unipolar,
Ultrasound Pulser 1.5A 150V
Features
►► HVCMOS technology for high performance
►► High density integrated ultrasound transmitter
►► 0 to +150V output voltage
►► ±1.5A source and sink current (min.)
►► ±300mA current in CW mode
►► Up to 18MHz operating frequency
►► Matched delay times
►► Built-in gate driver floating voltage regulator
►► 2.5 to 3.3V CMOS logic interface
Application
►► Portable medical ultrasound imaging
►► Piezoelectric transducer drivers
►► NDT ultrasound transmission
►► Pulse waveform generator
General Description
The Supertex HV7355 is an eight-channel, unipolar, high voltage,
high-speed pulse generator. It is designed for medical ultrasound
applications. This high voltage and high speed integrated circuit can
also be used for other piezoelectric, capacitive or MEMS sensors in
ultrasonic nondestructive detection and sonar ranger applications.
The HV7355 consists of a controller logic interface circuit, level
translators, MOSFET gate drivers and high current 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 ±1.5A for pulsing, when MC = 1, with up to 150V
swings. When MC = 0, all the output stages drop the peak current
to ±500mA for low-voltage CW mode operation to save power. This
direct coupling topology of the gate driver not only saves one high
voltage capacitor per channel, but also makes the PCB layout easier.
Typical Application Circuit
+3.3V
+5.0V
+5.0 to 150V
+3.3V
Logic
VLL
AVDD
EN
PWR
MC
CWD
IN0
Q0
VDD
CPF
VSS
VDD
LR
VPP
LT
VDD
LT
VPF
VDD
IN7
SET
LE
CS
SCK
Q7
Q[7:0]
Data Latch
VDD
LT
VDD
LT
VPP
VPF
VDD
Shift Reg.
SUB
Q7
D0
SDO
SDI
VSUB
GND
VSS
VPP
VPF
TX0
RGND
VPP
TX7
RGND
RGND
-5.0V
Doc.# DSFP-HV7355
D070813
X0
X7
Supertex inc.
www.supertex.com