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| HV2221 Datasheet, PDF (1/8 Pages) Supertex, Inc – Low Charge Injection, 8-Channel, Unipolar, Negative High Voltage, Analog Switch | |||
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HV2221
Low Charge Injection, 8-Channel,
Unipolar, Negative High Voltage, Analog Switch
Features
⺠Low on-resistance, 14Ω max.
⺠HVCMOS technology for high performance
⺠3.3 or 5.0V CMOS input logic level
⺠20MHz data shift clock frequency
⺠Very low quiescent power dissipation - 10µA
⺠Low parasitic capacitance
⺠DC to 10MHz analog signal frequency
⺠-60dB typical off-isolation at 5MHz
⺠CMOS logic circuitry for low power
⺠Excellent noise immunity
⺠Cascadable serial data register with latches
⺠Flexible operating supply voltages
Applications
⺠NDT metal ï¬aw detection
⺠Medical ultrasound imaging
⺠Piezoelectric transducer drivers
⺠Inkjet printer heads
⺠Optical MEMS modules
General Description
The Supertex HV2221 is a low charge injection, 8-channel, unipolar,
negative high voltage, analog switch integrated circuit (IC) intended
for use in applications requiring high voltage switching controlled
by low voltage control signals, such as NDT ultrasound ï¬aw
detection, medical ultrasound imaging, piezoelectric transducer
drivers, and printers.
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
efï¬cient control of high voltage analog signals.
Block Diagram
CLK
DIN
DOUT
8-BIT
SHIFT
REGISTER
LATCHES
D
LE
CLR
LEVEL
SHIFTERS
OUTPUT
SWITCHES
D
LE
CLR
D
LE
CLR
SW0
SW1
SW2
D
LE
CLR
D
LE
CLR
VDD GND LE CLR
VNN VPP
SW6
SW7
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