HV2221_11 Datasheet, PDF (1/8 Pages) Supertex, Inc – Low Charge Injection, 8-Channel, Unipolar, Negative High Voltage, Analog Switch

Supertex inc.
HV2221
Low Charge Injection, 8-Channel,
Unipolar, Negative High Voltage, Analog Switch
Features
►► Low on-resistance, 14Ω max.
►► HVCMOS technology for high performance
►► 3.3 or 5.0V CMOS input logic level
►► 20MHz data shift clock frequency
►► Very low quiescent power dissipation (-10µA)
►► Low parasitic capacitance
►► DC to 50MHz small signal frequency response
►► -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
Applications
►► NDT metal flaw detection
►► Medical ultrasound imaging
►► Piezoelectric transducer drivers
►► Inkjet printer heads
►► 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 flaw 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 efficient control of high voltage analog signals.
Block Diagram
CLK
8-Bit
Shift
DIN
Register
Latches
D
LE
CLR
D
LE
CLR
D
LE
CLR
Level
Shifters
Output
Switches
SW0
SW1
SW2
DOUT
D
LE
CLR
D
LE
CLR
VDD GND LE CLR
VNN VPP
SW6
SW7
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: [phone] ● www.supertex.com