HV232_13 Datasheet, PDF (1/9 Pages) Supertex, Inc – Low Charge Injection 8-Channel High Voltage Analog Switches with Bleed Resistors

Supertex inc.
HV232
Low Charge Injection 8-Channel High Voltage
Analog Switches with Bleed Resistors
Features
►►HVCMOS^® technology for high performance
►►Very low quiescent power dissipation (10µA max.)
►►Output on-resistance (22Ω typ.)
►►Integrated bleed resistors on the outputs
►►Low parasitic capacitances
►►DC to 50MHz small signal frequency response
►►-60dB typical output off isolation at 5.0MHz
►►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
General Description
The Supertex HV232 is a low charge injection 8-channel,
high-voltage, analog switch integrated circuit (IC) with bleed
resistors. This device can be used in applications requiring
high voltage switching controlled by low voltage control
signals, such as ultrasound imaging and printers. The bleed
resistors eliminate voltage built up on capacitive loads such
as piezoelectric transducers. 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
(LE) should be left high until all bits are clocked in. Using
HVCMOS^® technology, this switch combines high voltage
bilateral DMOS switches and low power CMOS logic to
provide efficient control of high voltage analog signals.
This IC is suitable for various combinations of high voltage
supplies, e.g., V_PP/V_NN: +50V/–150V, or +100V/–100V.
Block Diagram
Latches
D
LE
CL
Level
Shifters
Output
Switches
SW0
D
LE
CL
D
LE
DIN
CL
D
8-Bit
LE
CL
CLK
Shift
Register
D
LE
CL
DOUT
D
LE
CL
D
LE
CL
SW1
SW2
SW3
SW4
SW5
SW6
D
LE
SW7
CL
Doc.# DSFP-HV232
C071613
VDD
LE CL
VNN VPP
RGND
Supertex inc.
www.supertex.com