HV7370
Quad, High Speed, ±100V 850mA, Ultrasound Damper
Features
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HVCMOS
®
technology for high performance
High density integration ultrasound transmitter
0 to ±100V open-drain voltage
±850mA source and sink current
Up to 20MHz operation frequency
Matched delay times
1.8 to 5V CMOS logic interface
General Description
The Supertex HV7370 is a four-channel, monolithic high
voltage, high-speed damper. It is designed for working with
the HV738, HV748 or HV758 for medical ultrasound waveform
generators requiring fast return-to-zero applications. The
HV7370 consists of 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 stages of each channel are designed to provide
peak output currents of over ±0.85A for damping to ground,
with up to ±100V swing. The control from inputs to outputs uses
direct coupling topology, which not only saves components
and PCB layout space, but also makes the damping frequency
function down to DC.
Applications
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Medical ultrasound imaging
Piezoelectric transducer drivers
NDT ultrasound transmission
Pulse waveform generator
Block Diagram
+1.8 to 3.3V
+9.0V
+75V
V
PP
-9.0V
0 to +75V
C1
V
LL
OTP
EN
MC0
MC1
PIN1
(+Pulse)
NIN1
(-Pulse)
EN_PWR
C2
V
DD
C3
V
SUB
SUB
C4
V
PF
V
PP
C5
RGND
R
P1
P-Driver
TXP1
D1
D2
Level
Trans.
Level
Trans.
Pulser
N-Driver
R
N1
Supertex HV748
1 of 4 Channels
TXN1
RGND
HV
OUT
1
G
REF
+1.8 to 3.3V
Logic
V
SS
V
NF
C7
V
NN
+9.0V
V
NN
C6
0 to -75V
+1.8 to 3.3V
+9.0V
+9.0V
-9.0V
C1
V
LL
C2
V
DD
C3
V
SUB
SUB
C4
V
DP
RGND
X1
EN
EN_PWR
Level
Trans.
IN1
(Damp)
P-Driver
PD1
D3
D4
Level
Trans.
Damper
N-Driver
ND1
Supertex HV7370
1 of 4 Channels
V
SS
V
DN
RGND
C7
+9.0V
SIRECTIFIER [ SIRECTIFIER SEMICONDUCTORS ]
