Supertex inc.
Low Charge Injection, 8-Channel, High Voltage,
Enhanced Analog Switch with Bleed Resistors
Features
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HVCMOS technology for high performance
Integrated bleed resistors on the outputs
8 Channels of high voltage analog switch
3.3V or 5V CMOS input logic level
20MHz data shift clock frequency
Very low quiescent power dissipation-10µA
Low parasitic capacitance
DC to 10MHz analog signal frequency
-60dB typical off-isolation at 5MHz
CMOS logic circuitry for low power
Excellent noise immunity
Cascadable serial data register with latches
Flexible operating supply voltages
HV2301
Initial Release
General Description
The Supertex HV2301 is a low charge injection, 8-channel,
high voltage analog switch integrated circuit (IC) with bleed
resistors. The device can be used in applications requiring high
voltage switching, controlled by low voltage control signals,
such as medical ultrasound imaging, piezoelectric transducer
driver, and printers. The built-in bleed resistors eliminate
voltage built up on capacitive loads such as piezoelectric
transducers. The HV2301 is an enhanced version of the
HV232.
Input data is shifted into an 8-bit shift register that can then
be retained in an 8-bit latch. To reduce any possible clock
feed- through noise, the latch enable bar should be left high
until all bits are clocked in. Data is clocked in during the rising
edge of the clock. 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.
The device is suitable for various combinations of high
voltage supplies, e.g., V
PP
/V
NN
: +40V/-160V, +100V/-100V,
and +160V/-40V.
Applications
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Medical ultrasound imaging
NDT metal flaw detection
Piezoelectric transducer drivers
Inkjet printer heads
Optical MEMS modules
Block Diagram
LATCHES
D
LE
CL
LEVEL
SHIFTERS
OUTPUT
SWITCHES
SW0
CLK
D
LE
CL
SW1
D
IN
8-Bit
Shift
Register
D
LE
CL
SW2
D
OUT
D
LE
CL
SW6
D
LE
CL
SW7
V
DD
GND
LE
CLR
V
NN
V
PP
RGND
NR032106
Supertex inc.
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1235 Bordeaux Drive, Sunnyvale, CA 94089
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Tel: (408) 222-8888
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FAX: (408) 222-4895
·
www.supertex.com
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SUPERTEX [ Supertex, Inc ]
