HV2701_07 Datasheet, PDF (1/8 Pages) Supertex, Inc – Low Charge Injection 16-Channel High Voltage Analog Switch with Bleed Resistors

HV2701
Low Charge Injection 16-Channel
High Voltage Analog Switch with Bleed Resistors
Features
► HVCMOS technology for high performance
► Integrated bleed resistors on the outputs
► 16 Channels of 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 10MHz analog signal frequency
► -60dB typical off-isolation at 5MHz
► CMOS logic circuitry for low power
► Excellent noise immunity
► Cascadable serial data register with latches
► Flexible operating supply voltages
Applications
► 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 is 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., V_PP/V_NN: +40V/-160V, +100V/-100V,
and +160V/-40V.
Block Diagram
DIN
Latches
D
LE
CL
Level
Shifters
Output
Switches
SW0
D
LE
CLK
CL
SW1
D
16-Bit
LE
SW2
Shift
CL
Register
DOUT
D
LE
CL
D
LE
CL
VDD GND LE CL
VNN VPP
SW14
SW15
RGND