HV230_13 Datasheet, PDF (1/9 Pages) Supertex, Inc – Low Charge Injection, 8-Channel, High Voltage Analog Switches with Bleed Resistors

Supertex inc.
HV230
Low Charge Injection, 8-Channel, High Voltage
Analog Switches with Bleed Resistors
Features
XXHVCMOS^® technology for high performance
XXVery low quiescent power dissipation (-10µA max.)
XXOutput on-resistance typically (22Ω typ.)
XXIntegrated bleed resistors on the outputs
XXLow parasitic capacitances
►►DC to 50MHz small signal frequency response
XX-60dB typical output OFF isolation at 5.0MHz
XXCMOS logic circuitry for low power
XXExcellent noise immunity
XXON-chip shift register, latch and clear logic circuitry
XXFlexible high voltage supplies
Applications
XX Medical ultrasound imaging
XX Piezoelectric transducer drivers
General Description
The Supertex HV230 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
DIN
8-Bit
CLK
Shift
Register
DOUT
Latches
D
LE
CL
Level
Shifters
Output
Switches
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
SW0
SW1
SW2
SW3
SW4
SW5
SW6
SW7
Doc.# DSFP-HV230
C071613
VDD
LE CL
VNN VPP
RGND
Supertex inc.
www.supertex.com