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HV20320 Schematic ( PDF Datasheet ) - Supertex Inc

Teilenummer HV20320
Beschreibung Low Charge Injection 8-Channel High Voltage Analog Switch
Hersteller Supertex Inc
Logo Supertex  Inc Logo 




Gesamt 9 Seiten
HV20320 Datasheet, Funktion
Supertex inc.
Low Charge Injection
8-Channel High Voltage Analog Switch
HV20320
Features
►HVCMOS® technology for high performance
►Very low quiescent power dissipation (-10µA)
Output on-resistance typically 22Ω
►Low parasitic capacitances
►DC to 50MHz small signal frequency response
►-60dB typical output off isolation at 5.0MHz
►CMOS logic circuitry for low power
►Excellent noise immunity
►On-chip shift register, latch and clear logic circuitry
►Flexible high voltage supplies
Applications
Medical ultrasound imaging
Piezoelectric transducer drivers
General Description
This device is a low charge injection, 8-channel, high-voltage
analog switch integrated circuit (IC) intended for use in appli-
cations requiring high voltage switching controlled by low volt-
age control signals, such as ultrasound imaging and printers.
Input data is shifted into an 8-bit shift register which can then
be retained in an 8-bit latch. To reduce any possible clock
feed-through noise, Latch Enable Bar (LE) should be left high
until all bits are clocked in. Using HVCMOS® technology, this
switch combines high voltage bilateral DMOS switches and
low power CMOS logic to provide efficient control of high volt-
age analog signals.
These ICs are suitable for various combinations of high volt-
age supplies, e.g., VPP/VNN : +50V/-150V, or +100V/-100V.
Block Diagram
DIN
CLK
8-Bit
Shift
Register
DOUT
Level Output
Latches Shifters Switches
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
D
LE
CL
SW0
SW1
SW2
SW3
SW4
SW5
SW6
SW7
Doc.# DSFP-HV20320
C071613
VDD
LE CL
VNN VPP
Supertex inc.
www.supertex.com






HV20320 Datasheet, Funktion
Test Circuits
VPP -10V
ISOL
VNN +10V
VOUT
RLOAD
100kΩ
RL
VPP -10V
RL 10KW
VOUT
HV20320
VPP VPP
VNN VNN
VDD
GND
5.0V
Switch OFF Leakage
VPP VPP
VNN VNN
VDD
GND
5.0V
VPP VPP
VNN VNN
VDD
GND
5.0V
DC Offset ON/OFF
TON/TOFF Test Circuit
VIN = 10VP-P
@5.0MHz
VOUT
RL
VSIG
IID
VNN
VIN = 10VP-P
@5.0MHz
50W
50W
NC
VPP VPP
VNN VNN
VDD
GND
5.0V
KO
=
20Log
VOUT
VIN
OFF Isolation
VPP VPP
VNN VNN
VDD
GND
5.0V
Isolation Diode Current
VPP VPP
VNN VNN
VDD
GND
KCR
=
20Log
VOUT
VIN
Crosstalk
5.0V
VOUT
VOUT
1000pF
VSIG
VPP VPP
VNN VNN
VDD
GND
5.0V
Q = 1000pF x VOUT
Charge Injection
+VSPK
VOUT
-VSPK
RL 50W
1KW
VPP
VNN
VPP
VNN
VDD
GND
5.0V
Output Voltage Spike
Doc.# DSFP-HV20320
C071613
Supertex inc.
6 www.supertex.com

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