HV220 Datasheet, PDF (1/12 Pages) Supertex, Inc – Low Charge Injection 8-Channel High Voltage Analog Switches

HHVV222200//HHVV2200222200//HHVV2200332200
Low Charge Injection
8-Channel High Voltage Analog Switches
Features
❏ HVCMOS^® technology for high performance
❏ Very low quiescent power dissipation – 10µA
❏ Output on-resistance typically 22 ohms
❏ Low parasitic capacitances
❏ DC to 10MHz analog signal frequency
❏ -60dB typical output off isolation at 5MHz
❏ CMOS logic circuitry for low power
❏ Excellent noise immunity
❏ On-chip shift register, latch and clear logic circuitry
❏ Flexible high voltage supplies
Applications
❏ Medical ultrasound imaging
❏ Piezoelectric transducer drivers
Block Diagram
D_IN
CLK
General Description
These devices are low charge injection 8-channel high-voltage
analog switch integrated circuits (ICs) intended for use in
applications requiring high voltage switching controlled by low
voltage control signals, such as ultrasound imaging and print-
ers. 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, these
switches combine high voltage bilateral DMOS switches and
low power CMOS logic to provide efficient control of high voltage
analog signals.
These ICs are suitable for various combinations of high voltage
supplies, e.g., V_PP/V_NN : +50V/–150V, or +100V/–100V.B
LATCHES
D
LE
CL
LEVEL
SHIFTERS
OUTPUT
SWITCHES
SW0
D
LE
SW1
CL
D
LE
SW2
CL
D
LE
CL
8 BIT
SHIFT
REGISTER
D
LE
CL
SW3
SW4
D
LE
SW5
CL
D
D_OUT
LE
CL
SW6
D
LE
SW7
CL
V_DD
LE CL
V_NN V_PP
1
B021706
A011705