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
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.
Applications
►
►
►
►
Medical ultrasound imaging
NDT metal flaw detection
Piezoelectric transducer drivers
Optical MEMS modules
Block Diagram
Latches
D
LE
CL
Level
Shifters
Output
Switches
SW0
DIN
CLK
D
LE
CL
SW1
16-Bit
Shift
Register
D
LE
CL
SW2
DOUT
D
LE
CL
SW14
D
LE
CL
SW15
VDD GND
LE CL
VNN VPP
RGND
SUPERTEX [ Supertex, Inc ]
