CPC7220
Low Charge Injection 8-Channel
High Voltage Analog Switch
Features
•
Processed with BCDMOS on SOI (Silicon On
Insulator)
•
DC to 10MHz analog signal frequency
•
Surface mount package available
•
Low quiescent power dissipation (< 1µA typical)
•
Output on-resistance typically 20Ω
•
TTL I/O's for 3.3V interface
•
Adjustable high voltage supplies
Description
The CPC7220 is a low charge injection 8-channel
high-voltage analog switch integrated circuit (IC) for
use in applications requiring high voltage switching.
Control of the high voltage switching is via low
voltage TTL logic level compatible inputs for direct
connectivity to the system controller.
Applications
•
Ultrasound imaging
•
Printers
•
Industrial controls and measurement
Block Diagram
SHIFT
REGISTER
CLK
D
IN
SR0
L0
D
LE
CL
L1
D
LE
CL
L2
D
LE
CL
L3
D
LE
CL
L4
D
LE
CL
L5
D
LE
CL
L6
D
LE
CL
L7
D
LE
CL
LS0
LATCHES
LEVEL
SHIFTERS
PR
EL
SR1
LS1
SR2
LS2
SR3
LS3
SR4
LS4
SR5
LS5
SR6
LS6
SR7
D
OUT
CL
LE
LS7
V
PP
V
NN
IM
IN
SWITCHES
SW0
SW1
SW2
SW3
SW4
SW5
SW6
SW7
Because the CPC7220 is capable of switching high
load voltages and has a flexible load voltage range,
e.g. V
PP
/V
NN
: +40V/-160V or +100V/-100V, it is well
suited for many medical and industrial applications
such as medical ultrasound imaging, printers, and
industrial measurement equipment.
Construction of the high voltage switches using
Clare's reliable BCDMOS process technology on
SOI (Silicon On Insulator) allow the switches to be
organized as solid state switches with direct gate
drive.
Ordering Information
Part Number
CPC7220W
CPC7220WTR
CPC7220K
CPC7220KTR
Description
28-Lead PLCC in Tubes (37/Tube)
28-Lead PLCC Tape & Reel (500/Reel)
48-Lead LQFP in Trays (250/Tray)
48-Lead LQFP Tape & Reel (1000/Reel)
Pb
RoHS
2002/95/EC
e
3
www.clare.com
1
DS-CPC7220-R00H
A
RY
Switch manipulation is managed by an 8-bit serial to
parallel shift register whose outputs are buffered and
stored by an 8-bit transparent latch. Level shifters
buffer the latch outputs and operate the high voltage
switches.
CLARE [ CLARE, INC. ]
