HV732 Datasheet, PDF (1/10 Pages) Supertex, Inc – High Speed ±100V 2A Integrated Ultrasound Pulser

Supertex inc.
High Speed ±100V 2A
Integrated Ultrasound Pulser
HV732
Initial Release
Features
► HVCMOS technology for high performance
► 0 to ±100V output voltage
► ±2A source and sink current
► Built-in damping for RTZ waveform capability
► Gate-clamp for quick output amplitude ramping
► Up to 40MHz operation frequency
► ±3ns matched delay times
► Second harmonic is less than -40dB
► 1.8V to 3.3V CMOS logic interface
► 7x7 thermally-enhanced 44-lead QFN MCM
Application
► Medical ultrasound imaging
General Description
The Supertex HV732 is a single, complete, high-voltage,
high-speed, ultrasound transmitter pulser. It is designed for
medical ultrasound imaging applications.
The HV732 has built-in damping for faster RTZ waveform
capability and high voltage MOSFET gate-clamping function
for quick ramping of the output voltage amplitude.
The HV732 consists of a control logic circuit, level translators,
MOSFET gate drive buffers, clamp circuits, and high current,
high voltage MOSFETs as the ultrasound transmitter pulser
output stage.
In the output stage there are two pairs of MOSFETs. Each
pair consists of a P-channel and an N-channel MOSFET.
They are designed to have the same impedance, and can
provide peak currents of over ±2 amps. The built-in MOSFET
gate driver outputs swing 0 to 12V on P and N pins. The
DR
DR
P-channel damp output swings 0 to –5V on the DMPO pin.
Typical Application Circuit
10nF
P_IN
V_SUB
CLAMP
V_LL
V_LN
EN
V_DD
GND
N_IN
AV_DD
AGND
DAMP
P_DR
P_GATE
Level
Trans.
+12V
Buffer
Substrate, PAD₁
+1.8 to 3.3V
-5V
on/off
+5 to 12V
0V
Level
Trans.
+12V
Buffer
Clamp
Circuit
Bias
Level
Trans.
N_DR
N_GATE
DMPO DMPI
V_PP
0 to +100V
TX_P
PAD₃
PAD₂
TX_N
V_NN
0 to -100V
HV_OUT
OUT_N
OUT_P
RGND_P
RGND_N
10nF
10nF
NR040506
· · · · ^{Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: [phone] FAX: [phone] www.supertex.com}
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