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| HV758 Datasheet, PDF (1/7 Pages) Supertex, Inc – Quad High Speed ±90V 2.2A Ultrasound Pulser | |||
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HV758
Quad High Speed ±90V 2.2A Ultrasound Pulser
Features
⺠HVCMOS technology for high performance
⺠High density integration ultrasound transmitter
⺠0 to ±90V output voltage
⺠±2.2A source and sink current in PW mode
⺠±580mA source and sink current in CW mode
⺠Up to 20MHz operating frequency
⺠Matched delay times
⺠1.2V to 5.0V CMOS logic interface
⺠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.
Application
⺠Medical ultrasound imaging
⺠Piezoelectric transducer drivers
⺠NDT ultrasound transmission
⺠Pulse waveform generator
Typical Application Circuit
+1.8 to 3.3V
C1
VLL
+10V
C2
VDD
+1.8 to 3.3V
Logic
OTP
EN
MC0
MC1
PIN1
NIN1
EN_PWR
Level
Translator
Level
Translator
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 ï¬oating 10VDC power supplies referenced to VPP and VNN.
This direct coupling topology of the gate drivers not only saves
two high voltage capacitors per channel, but also makes the
PCB layout easier.
+90V VPP -10V 0 to +90V
C3
C4
VSUB VPF
C5
VPP
SUB
RGND
RP1
P-Driver
N-Driver
TXP1
D1
HVOUT1
TXN1 D2
RN1
X1
GREF
VSS
1 of 4 Channels
HV758 VNF
C7
VNN
C6
RGND
VNN +10V 0 to -90V
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