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| HV230_07 Datasheet, PDF (1/9 Pages) Supertex, Inc – Low Charge Injection 8-Channel High Voltage Analog Switches with Bleed Resistors | |||
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HV230/HV232
Low Charge Injection 8-Channel High Voltage
Analog Switches with Bleed Resistors
Features
⺠HVCMOS® technology for high performance
⺠Very low quiescent power dissipation â 10µA
⺠Output On-resistance typically 22Ω
⺠Integrated bleed resistors on the outputs
⺠Low parasitic capacitances
⺠DC to 10MHz analog signal frequency
⺠-60dB typical output off isolation at 5.0MHz
⺠CMOS logic circuitry for low power
⺠Excellent noise immunity
⺠On-chip shift register, latch and clear logic circuitry
⺠Flexible high voltage supplies
Applications
⺠Medical ultrasound imaging
⺠Piezoelectric transducer drivers
General Description
The Supertex HV230 and HV232 are low charge injection 8-
channel high-voltage analog switch integrated circuits(ICs)
with bleed resistors. These devices can be used in applications
requiring high voltage switching controlled by low voltage
control signals, such as ultrasound imaging and printers. The
bleed resistors eliminate voltage built up on capacitive loads
such as piezoelectric transducers. Input data is shifted into
an 8-bit shift register which can then be retained in an 8-bit
latch. To reduce any possible clock feed-through noise, Latch
Enable Bar (LE) should be left high until all bits are clocked
in. Using HVCMOS technology, this switch combines high
voltage bilateral DMOS switches and low power CMOS logic
to provide efï¬cient control of high voltage analog signals.
These ICs are suitable for various combinations of high voltage
supplies, e.g., VPP/VNN: +50V/â150V, or +100V/â100V.
Block Diagram
DIN
CLK
8-Bit
Shift
Register
DOUT
Latches
D
LE
CL
Level
Shifters
Output
Switches
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
SW0
SW1
SW2
SW3
SW4
SW5
SW6
SW7
VDD
LE CL
VNN VPP
RGND
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