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| HV219_07 Datasheet, PDF (1/9 Pages) Supertex, Inc – Low Charge Injection 8-Channel High Voltage Analog Switch | |||
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HV219
Low Charge Injection
8-Channel High Voltage Analog Switch
Features
⺠HVCMOS® technology for high performance
⺠Very low quiescent power dissipation -10µA
⺠Output ON-resistance typically 11Ω
⺠Low parasitic capacitance
⺠DC to 10MHz analog signal frequency
⺠-60dB typical off-isolation at 5MHz
⺠CMOS logic circuitry for low power
⺠Excellent noise immunity
⺠Serial shift register logic control with latches
⺠Flexible operating supply voltages
⺠Surface mount packages
Applications
⺠Medical ultrasound imaging
⺠Non-destructive evaluation
General Description
The Supertex HV219 is a low switch resistance, low charge injection
8-channel 200V analog switch integrated circuit (IC) intended primarily
for medical ultrasound imaging. The device can also be used for
NDE, non-destructive evaluation applications. The HV219 is a lower
switch resistance, 11Ω versus 22Ω, version of the Supertex HV20220
device. The lower switch resistance will help reduce insertion loss. It
has the same pin conï¬guration as that of the Supertex HV20220PJ
and the HV20220FG.
The device is manufactured using Supertexâs HVCMOS® (high voltage
CMOS) technology with high voltage bilateral DMOS structures for
the outputs and low voltage CMOS logic for the input control. The
outputs are conï¬gured as eight independent single pole single throw
11Ω analog switches. The input logic is an 8-bit serial to parallel shift
register followed by an 8-bit parallel latch. The switch states are
determined by the data in the latch. Logic high will correspond to a
closed switch and logic low as an opened switch.
The HV219 is designed to operate on various combinations of high
voltage supplies. For example the VPP and VNN supplies can be:
+40V/-160V, +100V/-100V, or +160V/-40V. This allows the user to
maximize the signal voltage for uni-polar negative, bi-polar, or uni-
polar positive.
Block Diagram
DIN
CLK
Level Output
Latches Shifters Switches
D
LE
CL
D
LE
CL
D
LE
CL
SW0
SW1
SW2
D
LE
8-Bit
CL
Shift
Register
D
LE
CL
SW3
SW4
D
LE
SW5
CL
D
DOUT
LE
CL
SW6
D
LE
SW7
CL
VDD GND LE CL
VNN VPP
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