HV2731
16-Channel (2 Banks of 8-Channels),
High Voltage, Analog Switch
With Bleed Resistors
Features
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HVCMOS
®
technology for high performance
220V operating conditions
22Ω typical output on-resistance
Integrated bleed resistors on the outputs
3.3V and 5.0V CMOS logic compatibility
Very low quiescent power dissipation (-10µA)
-45dB min off isolation at 7.5MHz
Low parasitic capacitance
Excellent noise immunity
Flexible operating supply voltages
48-lead LQFP package
General Description
The Supertex HV2731 is a 220V, 16-channel, high voltage, analog
switch integrated circuit (IC) with output bleed resistors (R
INT
).
The output switches are configured as 2 sets of 8 single pole,
single throw analog switches. The IC is intended to be used in
applications requiring high voltage switching controlled by low
voltage control signals, such as ultrasound imaging.
The 2 sets of 8 analog switches are controlled by 2 input logic
controls, D
IN
1 and D
IN
2. A logic high on D
IN
1 will turn on switches
0 to 7 and a logic high on D
IN
2 will turn on switches 8 to 15. The
bleed resistors help to significantly reduce voltage built up on
capacitive loads such as piezoelectric transducers connected to
the outputs.
Using HVCMOS
®
technology, this device combines high voltage
bilateral DMOS switches and low power CMOS logic to provide
efficient control of high voltage analog signals.
Applications
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Medical ultrasound imaging
Non-destructive evaluation
Block Diagram
V
DD
D
IN
1
Latch
1
Level
Translator 1
SW0
SW0
SW7
V
DD
D
IN
2
LE
GND
V
PP
V
NN
SW7
SW8
Latch
2
Level
Translator 2
SW8
SW15
SW15
R
GND
SUPERTEX [ Supertex, Inc ]
