CPC7232
8-Channel High Voltage Analog Switch with
Built-in Bleeder Resistors
Features
Description
• Processed with BCDMOS on SOI (Silicon on
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.
Insulator)
• Flexible High Voltage Supplies up to V -V +200V
PP NN
• 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
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.
Applications
• Ultrasound Imaging
• Printers
Because the CPC7232 is capable of switching high
load voltages and has a flexible load voltage range,
• Industrial Controls and Measurement
e.g. V /V : +40V/160V or +100V/100V, it is well
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Figure 1. Block Diagram
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.
LEVEL
SHIFTERS
OUTPUT
SWITCHES
LATCHES
V
PP
D
SW0
SW1
SW2
SW3
SW4
SW5
SW6
SW7
LE
D
IN
CL
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.
D
OUT
D
8 BIT
SHIFT
REGISTER
LE
CL
D
CLK
Ordering Information
LE
CL
Part Number Description
D
CPC7232W
CPC7232WTR 28-Lead PLCC Tape & Reel (500/Reel)
CPC7232K 48-Lead LQFP in Trays (250/Tray)
28-Lead PLCC in Tubes (37/Tube)
LE
CL
D
CPC7232KTR 48-Lead LQFP Tape & Reel (1000/Reel)
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
CL
LE
RoHS
2002/95/EC
V
RGND
NN
Pb
e3
DS-CPC7232 - R00E
www.clare.com
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