Supertex inc.
HV2701
Low Charge Injection 16-Channel
High Voltage Analog Switch with Bleed Resistors
Features
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HVCMOS technology for high performance
Integrated bleed resistors on the outputs
16-channel high voltage analog switch
3.3V input logic level compatible
20MHz data shift clock frequency
Very low quiescent power dissipation (-10µA)
Low parasitic capacitance
DC to 50MHz small signal frequency response
-60dB typical OFF-isolation at 5.0MHz
CMOS logic circuitry for low power
Excellent noise immunity
Cascadable serial data register with latches
Flexible operating supply voltages
Applications
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Medical ultrasound imaging
NDT metal flaw detection
Piezoelectric transducer drivers
Optical MEMS modules
General Description
The Supertex HV2701 is a low charge injection, 16-channel, high
voltage, analog switch integrated circuit (IC) with bleed resistors.
The device can be used in applications requiring high voltage
switching controlled by low voltage control signals, such as medical
ultrasound imaging and piezoelectric transducer drivers. The bleed
resistors eliminate voltage built up on capacitive loads such as
piezoelectric transducers.
Input data are shifted into a 16-bit shift register that can then be
retained in a 16-bit latch. To reduce any possible clock feed-through
noise, the latch enable bar should be left high until all bits are
clocked in. Data is clocked in during the rising edge of the clock.
Using HVCMOS technology, this device combines high voltage
bilateral DMOS switches and low power CMOS logic to provide
efficient control of high voltage analog signals.
The device is suitable for various combinations of high voltage
supplies, e.g., VPP/VNN: +40V/-160V, +100V/-100V, and +160V/-40V.
Block Diagram
Latches
D
LE
CLR
Level
Shifters
Output
Switches
SW0
D
LE
CLR
D
LE
CLR
SW14
D
LE
CLR
CLK
16-Bit
Shift
Register
SW2
D
LE
CLR
DIN
SW1
SW15
DOUT
VDD GND
Doc.# DSFP-HV2701
E012412
LE CLR
VNN VPP
RGND
Supertex inc.
www.supertex.com
