HV2303
Low Charge Injection, 8-Channel High Voltage
Analog Switch with Bleed Resistors
Features
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HVCMOS technology for high performance
Integrated bleed resistors on the outputs
3.3V or 5.0V 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 5.0MHz
CMOS logic circuitry for low power
Excellent noise immunity
Cascadable serial data register with latches
Flexible operating supply voltages
General Description
The Supertex HV2303 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 signals, such as medical
ultrasound imaging, piezoelectric transducer driver, and printers.
The bleed resistors eliminate voltage built up on capacitive loads
such as piezoelectric transducers.
Data is input 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/-140V, +90V/-90V, and +140V/-40V.
Applications
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Medical ultrasound imaging
NDT metal flaw detection
Piezoelectric transducer drivers
Inkjet printer heads
Optical MEMS modules
Block Diagram
LEVEL
OUTPUT
SHIFTERS &
LATCHES
SWITCHES
CHARGE CONTROL
D
LE
CLR
SW0
CLK
D
LE
CLR
SW1
D
IN
8-BIT
SHIFT
REGISTER
D
LE
CLR
SW2
D
OUT
D
LE
CLR
SW6
D
LE
CLR
SW7
VDD GND
LE
CLR
VNN VPP
RGND
SUPERTEX [ Supertex, Inc ]
