HV219
Low Charge Injection
8-Channel High Voltage Analog Switch
Features
►
►
►
►
►
►
►
►
►
►
►
HVCMOS
®
technology for high performance
Very low quiescent power dissipation -10µA
Output ON-resistance typically 11Ω
Low parasitic capacitance
DC to 10MHz analog signal frequency
-60dB typical off-isolation at 5MHz
CMOS logic circuitry for low power
Excellent noise immunity
Serial shift register logic control with latches
Flexible operating supply voltages
Surface mount packages
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 configuration as that of the Supertex HV20220PJ
and the HV20220FG.
The device is manufactured using Supertex’s 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 configured 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 V
PP
and V
NN
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.
Level
Output
Latches Shifters Switches
D
LE
CL
Applications
►
Medical ultrasound imaging
►
Non-destructive evaluation
Block Diagram
D
IN
SW0
D
LE
CL
SW1
CLK
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
SW2
8-Bit
Shift
Register
SW3
SW4
SW5
D
OUT
SW6
SW7
V
DD
GND LE CL
V
NN
V
PP
SUPERTEX [ Supertex, Inc ]
