VISHAY
LH1544AAC/ AACTR/ AB
Vishay Semiconductors
Dual 1 Form A Solid State Relay (Low Capacitance)
DIP
SMD
Features
•
•
•
•
•
•
•
•
•
Dual Channel, LH1541 Type
Low Capacitance Switch (5.0 pF)
Isolation Test Voltage 5300 V
RMS
Extremely High OFF-resistance
Load Voltage 200 V
Linear, AC/DC Operation
Clean Bounce Free Switching
Low Power Consumption
High Reliability Monolithic detector
S1
8
S1
S1'
S1' S2
7 6
S2'
5
S2
i179034
S2'
1
2
3
4
Agency Approvals
•
•
•
•
UL - File No. E52744
CSA - Certification 093751
BSI/BABT Cert. No. 7980
DIN EN 60747-5-5 (VDE 0884):2003-01 Available
with Option 1
• FIMKO Approval
Order Information
Part
LH1544AAC
LH1544AACTR
LH1544AB
Remarks
SMD-8, Tubes
SMD-8, Tape and Reel
DIP-8, Tubes
Description
These dual SSRs (LH1544, Dual 1 Form A) are SPST
normally open switches which can replace electrome-
chanical relays in many applications. The relays pro-
vide a low-capacitance, high-voltage switch contact
with high off-resistance and low switch-offset voltage.
These characteristics, combined with high-speed
actuation, result in an SSR which is ideal for small sig-
nal and dc instrumentation applications.
The relays are constructed by using a GaAlAs LED for
actuation control and an integrated monolithic die for
the switch output. The die is comprised of a photo-
diode array, switch-control circuity, and low-capaci-
tance MOSFET switches.
Applications
Instrumentation
- Thermocouple Switching
- Analog Multiplexing
Reed Relay Replacement
Programmable Logic Controllers
Data Acquisition
Test Equipment
Document Number 83835
Rev. 1.2, 08-Mar-04
www.vishay.com
1
LH1544AAC/ AACTR/ AB
Vishay Semiconductors
Absolute Maximum Ratings, T
amb
= 25 °C
VISHAY
Stresses in excess of the absolute Maximum Ratings can cause permanent damage to the device. Functional operation of the device is
not implied at these or any other conditions in excess of those given in the operational sections of this document. Exposure to absolute
Maximum Ratings for extended periods of time can adversely affect reliability.
SSR
Parameter
LED continuous forward current
LED reverse voltage
DC or peak AC load voltage
Continuous DC load current -
one pole operating
Continuous DC load current -
two pole operating
Peak load current (single shot)
Ambient temperature range
Storage temperature range
Pin soldering temperature
Input/output isolation voltage
Pole-to-pole isolation voltage
(S1 to S2)
1)
Test condition
I
R
≤
10
µA
I
L
≤
50
µA
Symbol
I
F
V
R
V
L
I
L
I
L
Value
50
8.0
200
55
40
100
- 40 to + 85
- 40 to + 150
260
5300
1600
Unit
mA
V
V
mA
mA
mA
°C
°C
°C
V
RMS
V
mW
t = 100 ms
I
P
T
amb
T
stg
t = 10 s max
dry air, dust free, at sea level
T
sld
V
ISO
Output power dissipation
(continuous)
1)
P
diss
600
Breakdown occurs between the output pins external to the package
Electrical Characteristics, T
amb
= 25 °C
Minimum and maximum values are testing requirements. Typical values are characteristics of the device and are the result of engineering
evaluations. Typical values are for information only and are not part of the testing requirements.
Input
Parameter
LED forward current,
switch turn-on
LED forward current,
switch turn-off
LED forward voltage
Test condition
I
L
= 100 mA, t = 10 ms
V
L
= ± 300 V
I
F
= 5.0 mA
Symbol
I
Fon
I
Foff
V
F
0.2
1.10
Min
Typ.
0.9
0.8
1.19
1.45
Max
2.0
Unit
mA
mA
V
Output
Parameter
ON-resistance
Off-resistance
Off-state leakage current
Output capacitance
Output capacitance Pin 4 to 6
Pole-to-pole Capacitance
(S1 to S2)
Switch offset
Test condition
I
F
= 5.0 mA, I
L
= 50 mA
I
F
= 0 mA, V
L
= ± 100 V
I
F
= 0 mA, V
L
= ± 100 V
I
F
= 0 mA, V
L
= ± 350 V
I
F
= 0 mA, V
L
= 1.0 V
I
F
= 0 mA, V
L
= 50 V
I
F
= 5.0 mA
I
F
= 5.0 mA
V
OS
Symbol
R
ON
R
OFF
I
O
I
O
C
O
C
O
0
0.5
0.5
0.1
Min
70
0.5
Typ.
110
10000
0.01
200
1.0
Max
160
Unit
Ω
GΩ
nA
µA
pF
pF
pF
V
www.vishay.com
2
Document Number 83835
Rev. 1.2, 08-Mar-04
VISHAY
Transfer
Parameter
Capacitance (input-output)
Turn-on time
Turn-off time
Test condition
V
ISO
= 1.0 V
I
F
= 5.0 mA, I
L
= 50 mA
I
F
= 5.0 mA, I
L
= 50 mA
LH1544AAC/ AACTR/ AB
Vishay Semiconductors
Symbol
C
IO
t
on
t
off
Min
Typ.
1.1
0.13
0.6
Max
0.25
0.25
Unit
pF
ms
ms
Footnotes
The following information refers to the SSR Recommended Opera-
tion Conditions:
- Both relays on with equal load currents. For single relay operation,
refer to the LH1541 Recommended Operating Conditions graph.
Typical Characteristics
(T
amb
= 25
°C
unless otherwise specified)
50
LED Forward Voltage (V)
1.20
IL = 100 mA
1.15
TYP.
1.10
MIN.
40
Load Current (mA)
30
IFon = 5.0 to 20 mA
20
10
0
-40
IFon = 2.0 mA
IFon = 3.0 mA
IFon = 4.0 mA
1.05
1.00
0.95
-20
0
20
40
60
80
ilh1544ab_02
-40
-20
0
20
40
60
80
ilh1544ab_00
Ambient Temperature (°C)
Ambient Temperature (°C)
Fig. 1 Recommended Operating Conditions
Fig. 3 LED Dropout Voltage vs. Temperature
1.6
LED Forward Current for Switch
Turn-on (%), Normalized to 25 °C
160
150
120
90
60
30
0
-30
-60
-40
ilh1544ab_03
LED Forward Voltage (V)
1.5
1.4
1.3
1.2
1.1
IF = 1.0 mA
IF = 2.0 mA
IF = 5.0 mA
IF = 10 mA
IF = 20 mA
IL = 50 mA
IF = 50 mA
1.0
-40
ilh1544ab_01
-20
0
20
40
60
80
-20
0
20
40
60
80
Ambient Temperature, TA (°C)
Ambient Temperature (°C)
Fig. 2 LED Voltage vs. Temperature
Fig. 4 LED Current for Switch Turn-on vs. Temperature
Document Number 83835
Rev. 1.2, 08-Mar-04
www.vishay.com
3
LH1544AAC/ AACTR/ AB
Vishay Semiconductors
VISHAY
50
Change in ON-resistance (%)
Normalized to 25 °C
100
IL = 50 mA
Isolation (dB)
40
30
20
10
0
-10
-20
-30
-40
-40
0
-20
0
20
40
60
80
ilh1544ab_07
80
60
40
VP = 10 V
RL = 50
Ω
20
10 2
10 3
10 4
10 5
10 6
10 7
ilh1544ab_04
Ambient Temperature (°C)
Frequency (Hz)
Fig. 5 ON-Resistance vs. Temperature
Fig. 8 Output Isolation
6.0
Off–State Leakage Current ( nA )
1000
5.0
Capacitance (pF)
4.0
3.0
2.0
1.0
0.0
0
100
10
T = 25 C
1
0.1
10 20 30 40 50 60 70 80 90 100
Applied Voltage (V)
17323
0
40
ilh1544ab_05
80
120
160
Load Voltage ( V )
200
Fig. 6 Switch Capacitance vs. Applied Voltage
Fig. 9 Leakage Current vs. Applied Voltage
2.00
RL = 600
Ω
Off–State Leakage Current ( nA )
1000
T = 85 C
100
T = 70 C
T = 50 C
10
1.75
Insertion Loss (dB)
1.50
1.25
1.00
0.75
0.50
0.25
0
10 2
1
0.1
10 3
10 4
10 5
17324
0
40
80
120
160
200
ilh1544ab_06
Frequency (Hz)
Load Voltage ( V )
Fig. 7 Insertion Loss vs. Frequency
Fig. 10 Leakage Current vs. Applied Voltage at Elevated
Temperatures
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4
Document Number 83835
Rev. 1.2, 08-Mar-04
VISHAY
LH1544AAC/ AACTR/ AB
Vishay Semiconductors
8
Change in Breakdown Voltage (%)
Normalized to 25 °C
6
Change in Turn-on Time (%)
Normalized to 25 °C
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-40
ilh1544ab_13
4
2
0
-2
-4
-6
-8
-20
0
20
40
60
80
IF = 5.0 mA
IL = 50 mA
-10
-40
ilh1544ab_10
-20
0
20
40
60
80
Ambient Temperature (°C)
Ambient Temperature (°C)
Fig. 11 Switch Breakdown Voltage vs. Temperature
Fig. 14 Turn-on Time vs. Temperature
3.5
Switch Offset Voltage (µV)
Change in Turn-off Time (%)
Normalized to 25 °C
3.0
2.5
2.0
1.5
1.0
0.5
IF = 5.0 mA
160
140
120
100
80
60
40
20
0
-20
-40
-60
-80
-40
IF = 5.0 mA
IL = 50 mA
0
20
ilh1544ab_11
30
40
50
60
70
80
90
-20
0
20
40
60
80
Ambient Temperature (°C)
ilh1544ab_14
Ambient Temperature (°C)
Fig. 12 Switch Offset Voltage vs. Temperature
Fig. 15 Turn-off Time vs. Temperature
0.6
Switch Offset Voltage (µV)
2
IL = 50 mA
1.5
Turn-on Time (ms)
0.5
0.4
0.3
0.2
0.1
0
0
5
10
15
20
25
ilh1544ab_15
1
T = 85 °C
T = 25 °C
T = -40 °C
0.5
0
0
10
LED Forward Current (mA)
20
30
LED Current (mA)
40
50
ilh1544ab_12
Fig. 13 Switch Offset Voltage vs. LED Current
Fig. 16 Turn-on Time vs. LED Current
Document Number 83835
Rev. 1.2, 08-Mar-04
www.vishay.com
5
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