HV238
16-Channel High Voltage Analog Switch
With Bleed Resistors
Features
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HVCMOS
®
technology for high performance
220V operating conditions
Output on-resistance typically 22Ω
Integrated bleed resistors on the outputs
5.0 and 12.0V CMOS logic compatibility
Very low quiescent power dissipation (-10µA)
-45dB min off isolation at 7.5MHz
Low parasitic capacitance
Excellent noise immunity
Flexible operating supply voltages
General Description
The Supertex HV238 is a 220V, 16-channel, high voltage
analog switch integrated circuit (IC) with output bleed resistors
(R
INT
). The output switches are configured as 2 sets of 8 single
pole single throw analog switches. It is intended to be used in
applications requiring high voltage switching controlled by low
voltage control signals such as ultrasound imaging.
Applications
►
Medical ultrasound imaging
►
Non-destructive evaluation
The 2 sets of 8 analog switches are controlled by 2 input
logic controls, D
IN
1 and D
IN
2. A logic high on D
IN
1 will turn on
switches 0 to 7 and a logic high on D
IN
2 will turn on switches 8
to 15. The bleed resistors help to significantly reduce voltage
built up on capacitive loads such as piezoelectric transducers
connected to the outputs.
Block Diagram
VDD
D
IN
1
Latch 1
Level
Translator 1
SW0
SW0
SW7
VDD
D
IN
2
LE
GND
VPP
VNN
Level
Translator 2
SW7
SW8
Latch 2
SW8
SW15
SW15
RGND
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
HV238
Ordering Information
Device
HV238
7.00x7.00mm body
1.60mm height (max)
0.50mm pitch
Pin Configuration
48-Lead LQFP
1
48
HV238FG-G
-G indicates the part is RoHS compliant (Green)
48-Lead LQFP (FG)
(top view)
Absolute Maximum Ratings
Parameter
V
DD
logic power supply voltage
V
PP
- V
NN
supply voltage
V
PP
positive high voltage supply
V
NN
negative high voltage supply
Logic input voltages
Analog signal range
Peak analog signal current/channel
Storage temperature
Power dissipation
Value
-0.5V to +15V
225V
-0.5V to V
NN
+225V
+0.5V to -225V
-0.5V to V
DD
+0.3V
V
NN
to V
PP
3.0A
-65
O
C to +150
O
C
1.0W
Product Marking
Top Marking
YY = Year Sealed
WW = Week Sealed
L L LL LLL LL
L = Lot Number
Bottom Marking
C = Country of Origin*
A = Assembler ID*
= “Green” Packaging
CCCCCCCC
H V23 8FG
YYW W
AAA
*May be part of top marking
Package may or may not include the following marks: Si or
48-Lead LQFP (FG)
Absolute Maximum Ratings are those values beyond which damage to the device may
occur. Functional operation under these conditions is not implied. Continuous operation
of the device at the absolute rating level may affect device reliability. All voltages are
referenced to device ground.
Operating Conditions
Sym
V
DD
V
PP
V
NN
V
IH
V
IL
V
SIG
T
A
Parameter
Logic power supply voltage
Positive high voltage supply
Negative high voltage supply
High level input voltage
Low-level input voltage
Analog signal voltage peak-to-peak
Operating free air temperature
Value
4.75V to 12.6V
50V to 110V
-10V to V
PP
-220V
V
DD
-1.0V to V
DD
0V to 1.0V
V
NN
+10V to V
PP
-10V
0
O
C to 70
O
C
Notes:
1.
Power up/down sequence is arbtrary except GND must be powered -up first and powered-down last.
2.
V
SIG
must be V
NN
≤ V
SIG
≤ V
PP
or floating during power up/down transition.
3.
Rise and fall times of power supplies V
DD
, V
PP
, and V
NN
should not be less than 1.0msec.
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
2
HV238
DC Electrical Characteristics
(Over operating conditions unless otherwise specified )
Sym
Parameter
0
O
C
Min
-
Small signal switch
on-resistance
-
-
-
ΔR
ONS
R
ONL
R
INT
I
SOL
V
OS
I
PPQ
I
NNQ
I
PPQ
I
NNQ
I
SW
f
SW
I
PP
I
NN
I
PP
I
NN
I
DDQ
I
DD
C
IN
Small signal switch
on-resistance matching
Large signal switch
on-resistance
Output switch shunt resistance
Switch off leakage per switch
DC offset switch off
DC offset switch on
Quiescent V
PP
supply current
Quiescent V
NN
supply current
Quiescent V
PP
supply current
Quiescent V
NN
supply current
Switch output peak current
Output switching frequency
Average V
PP
supply current
Average V
NN
supply current
Average V
PP
supply current
Average V
NN
supply current
Logic supply quiescent current
Logic supply average current
Logic input capacitance
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Max
30
25
25
20
20
-
-
5.0
300
500
-
-
-
-
3.0
-
6.5
8.1
-8.1
5.0
10
2.0
10
Min
-
-
-
-
-
-
20
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+25
O
C
Typ
26
22
22
18
5.0
15
35
1.0
100
100
10
-10
10
-10
3.0
-
-
-
-
-
-
-
-
Max
32
27
27
22
20
-
50
10
300
500
50
-50
50
-50
2.0
50
8.8
-8.8
6.3
-6.3
10
2.0
10
+70
O
C
Min
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Max
40
35
Ω
30
25
20
-
-
15
300
500
-
-
-
-
2.0
-
10
-10
6.9
-6.9
10
2.0
10
%
Ω
KΩ
μA
mV
Units Conditions
V
SIG
= 0V,
I
SIG
= 5.0mA
V
SIG
= 0V,
I
SIG
= 200mA
V
SIG
= 0V,
I
SIG
= 5.0mA
V
SIG
= 0V,
I
SIG
= 200mA
V
PP
= +50V
V
NN
= -170V
R
ONS
V
PP
= +110V
V
NN
= -110V
V
SIG
= 0V, I
SIG
= 5.0mA,
V
PP
= +110V, V
NN
= -110V
V
SIG
= 0V, I
SIG
= 1.0A
Output switch to R
GND
, I
RINT
= 0.5mA
V
SIG
= V
PP
-10V, V
NN
= +10V
No Load
μA
All switches off
μA
A
kHz
mA
All switches on, I
SW
= 5.0mA
V
SIG
duty cycly < 0.1%
Duty cycle = 50%
V
PP
= +50V, V
NN
= -170V
All output switches are turning on
and off at 50kHz
V
PP
= +110V, V
NN
= -110V
All output switches are turning on
and off at 50kHz
All logic inputs are static.
D
IN
1 = D
IN
2 = 3.0MHz, LE is high
---
mA
μA
mA
pF
AC Electrical Characteristics
(Over recommended operating conditions, V
t
WLE
t
WDIN
t
SD
t
ON
t
OFF
dv/dt
Time width of LE
Time width of D
IN
Set up time before LE rises
Turn on time
Turn off time
Maximun V
SIG
slew rate
150
150
150
-
-
-
-
-
-
5.0
5.0
20
150
150
150
-
-
-
-
-
-
-
-
-
-
-
-
5.0
5.0
20
150
150
150
-
-
-
-
-
-
5.0
5.0
20
DD
= 5.0V, unless otherwise specified)
ns
ns
ns
μs
μs
V/ns
---
---
---
V
SIG
= V
PP
-10V, R
LOAD
= 10kΩ
V
SIG
= V
PP
-10V, R
LOAD
= 10kΩ
---
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
3
HV238
AC Electrical Characteristics
(Over recommended operating conditions, V
Sym
K
O
K
CR
I
ID
Parameter
Off isolation
Switch crosstalk
Output switch isolation diode
current
On capacitance SW to GND
Output voltage spike
0
O
C
Min
-30
-45
-45
-
5.0
25
-
-
Max
-
-
-
300
17
50
-
-
Min
-30
-45
-45
-
5.0
25
-
-
+25
O
C
Typ
-33
-50
-
-
12
38
4.0
-4.0
Max
-
-
-
300
17
50
-
-
+70
O
C
Min
-30
-45
-45
-
5.0
25
-
-
Max
-
-
-
300
17
50
-
-
DD
= 5.0V, unless otherwise specified)
Units Conditions
dB
dB
mA
pF
pF
V
f = 5.0MHz, 1.0kΩ/15pF load
f = 7.5MHz, R
LOAD
= 50Ω load
f = 5.0MHz, 50Ω load
300ns pulse width,
2.0% duty cycle
V
SIG
= 0V, f = 1.0MHz
V
SIG
= 0V, f = 1.0MHz
R
LOAD
= 50Ω
C
SG(OFF)
Off capacitance SW to GND
C
SG(ON)
+V
SPK
-V
SPK
Logic Timing Diagram
V
DD
D
IN
0V
50%
V
DD
LE
t
SD
50%
t
WLE
50%
50%
0V
ON
SW
OFF
90%
10%
T
ON
T
OFF
Truth Table
D
IN
2
L
L
H
H
X
D
IN
1
L
H
L
H
X
LE
L
L
L
L
H
SW0 to SW7
OFF
ON
OFF
ON
Hold Previous State
SW8 to SW15
OFF
OFF
ON
ON
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
4
HV238
Test Circuits
V
PP
-10V
V
PP
-10V and
V
NN
+10V
R
INT
R
INT
V
OUT
R
GND
RL
10kΩ
V
OUT
R
INT
R
INT
V
OUT
R
INT
R
INT
R
GND
V
DD
GND
V
OUT
R
INT
5.0V
V
PP
V
NN
V
PP
V
NN
V
DD
GND
5.0V
V
PP
V
NN
R
GND
V
PP
V
NN
V
DD
GND
5.0V
V
PP
V
NN
V
PP
V
NN
I
SOL
=
Switch OFF Leakage
DC Offset ON/OFF
T
ON
/T
OFF
V
OUT
V
IN
= 10V
P-P
@5.0MHz
R
INT
R
INT
L
OAD
V
OUT
V
IN
= 10V
P-P
@5.0MHz
NC
50Ω
R
INT
R
INT
50Ω
R
GND
V
PP
V
NN
V
PP
V
NN
V
DD
GND
5.0V
R
GND
V
PP
V
NN
V
PP
V
NN
K
CR
= 20Log
V
DD
GND
V
OUT
V
IN
5.0V
V
OUT
K
O
= 20Log
V
IN
Off Isolation
Crosstalk
V
SIG
I
ID
V
NN
R
INT
R
INT
V
OUT
1KΩ
R
INT
R
INT
+V
SPK
V
SIG
-V
SPK
SPK
R
INT
R
INT
∆V
OUT
V
OUT
1000pF
50Ω
R
GND
V
PP
V
NN
V
PP
V
NN
V
DD
GND
5.0V
V
PP
V
NN
R
GND
V
PP
V
NN
V
DD
GND
5.0V
R
GND
V
PP
V
NN
V
PP
V
NN
V
DD
GND
5.0V
Isolation Diode Current
Output Voltage Spike
Q = 1000pF x ∆V
OUT
Charge Injection
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
5
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