HV758
Quad High Speed ±90V 2.2A Ultrasound Pulser
Features
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HVCMOS technology for high performance
High density integration ultrasound transmitter
0 to ±90V output voltage
±2.2A source and sink current in PW mode
±580mA 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
General Description
The Supertex HV758 is a four-channel, monolithic 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 transducers in ultrasonic nondestructive
detection and sonar ranger applications.
The HV758 comprises a controller logic interface circuit, level
translators, MOSFET gate drives and high current power P-
channel and N-channel MOSFETs as the output stage for
each channel.
The output current limit can be set to one of four levels by
using two mode control inputs. The output stages of each
channel are designed to provide peak output currents over
±2.5A when in mode 4, with up to 180V swings. When in
mode 1, the output stages reduce the peak current to ±580mA
for CW mode operation, which reduces the power dissipation
of the IC. The power MOSFET gate drivers are supplied by
two floating 10VDC power supplies referenced to V
PP
and V
NN
.
This direct coupling topology of the gate drivers not only saves
two high voltage capacitors per channel, but also makes the
PCB layout easier.
Application
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Medical ultrasound imaging
Piezoelectric transducer drivers
NDT ultrasound transmission
Pulse waveform generator
Typical Application Circuit
+1.8 to 3.3V
C1
V
LL
OTP
EN
MC0
MC1
PIN1
+1.8 to 3.3V
Logic
NIN1
Level
Translator
N-Driver
R
N1
RGND
V
NN
C7
V
NN
+10V
C6
0 to -90V
TXN1
EN_PWR
+10V
C2
V
DD
C3
+90V V
PP
-10V
C4
V
SUB
SUB
0 to +90V
C5
V
PP
V
PF
RGND
R
P1
Level
Translator
P-Driver
TXP1
D1
HV
OUT
1
D2
X1
1 of 4 Channels
G
REF
V
SS
HV758
V
NF
SUPERTEX [ Supertex, Inc ]
