8-Channel High Voltage Analog Switch with
Built-in Bleeder Resistors
Features
•
Processed with BCDMOS on SOI (Silicon on
Insulator)
•
Flexible High Voltage Supplies up to V
PP
-V
NN
+200V
•
Output Bleed Resistors Built into the Device
•
DC to 10MHz Analog Signal Frequency
•
Surface Mount Package Available
•
Low Quiescent Power Dissipation (< 1μA Typical)
•
Output Switch On-Resistance Typically 20Ω
•
TTL I/Os for 3.3V Interface
CPC7232
Description
The CPC7232 is a low charge injection 8-channel
high-voltage analog switch integrated circuit (IC) for
use in applications requiring high voltage switching.
Bleeder resistors are incorporated into both terminals
of each output switch. Control of the high voltage
switching is via low voltage TTL logic level compatible
inputs for direct connectivity to the system controller.
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.
Because the CPC7232 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. The bleeder
resistors enable the discharge of capacitive loads,
such as piezoelectric transducers, connected to the
output switches of the CPC7232.
SW0
Applications
•
Ultrasound Imaging
•
Printers
•
Industrial Controls and Measurement
Figure 1. Block Diagram
LATCHES
LEVEL
SHIFTERS
OUTPUT
SWITCHES
V
DD
V
PP
D
IN
D
OUT
8
BIT
SHIFT
REGISTER
D
LE
CL
D
LE
CL
SW1
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.
CLK
D
LE
CL
SW2
Ordering Information
Part Number Description
CPC7232W
CPC7232WTR
CPC7232K
CPC7232KTR
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)
D
LE
CL
SW3
D
LE
CL
SW4
D
LE
CL
SW5
D
LE
CL
SW6
D
LE
CL
CL
LE
V
NN
RGND
SW7
Pb
www.clare.com
RoHS
2002/95/EC
e
3
1
DS-CPC7232 - R00E
CLARE [ CLARE, INC. ]
