HV238 データシートの表示（PDF） - Supertex Inc
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HV238 Datasheet PDF : 7 Pages
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Supertex inc.
HV238
16-Channel High Voltage Analog Switch
With Bleed Resistors
Features
►► HVCMOS® technology for high performance
►► 220V operating conditions
►► Output on-resistance typically 22Ω
►► Integrated bleed resistors on the outputs
►► 5.0 and 12.0V 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
Applications
►► Medical ultrasound imaging
►► Non-destructive evaluation
General Description
The Supertex HV238 is a 220V, 16-channel, high voltage
analog switch integrated circuit (IC) with output bleed resistors
(RINT). The output switches are configured as 2 sets of 8 single
pole single throw analog switches. It 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, DIN1 and DIN2. A logic high on DIN1 will turn on switches
0 to 7 and a logic high on DIN2 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.
Block Diagram
VDD
DIN1
Latch 1
Level
Translator 1
SW0
SW0
SW7
DIN2
LE
GND
VPP
VNN
Doc.# DSFP-HV238
B070813
VDD
Latch 2
Level
Translator 2
SW7
SW8
SW8
SW15
SW15
RGND
Supertex inc.
www.supertex.com
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