LH1541AT1/AAB1/AAB1TR
1 Form A
Solid State Relay
(Low Capacitance)
FEATURES
• Low Capacitance Switch (5.0 pF)
• l/O Isolation, 5300 V
RMS
• Extremely High OFF-resistance (100 T
Ω
)
• Load Voltage 350 V
• Linear, AC/DC Operation
• Clean Bounce Free Switching
• Low Power Consumption
• High Reliability Monolithic Receptor
AGENCY APPROVALS
•
•
•
•
•
UL – File No. E52744
CSA – Certification 093751
BSI/BABT Cert. No. 7980
VDE 0884 Approval
FIMKO Approval
Package Dimensions in Inches (mm)
DIP
Pin One ID.
3
.256 (6.50)
.248 (6.30)
4
5
6
2
1
S
6
DC
5
S'
4
S
S'
1
2
3
.343 (8.70)
.335 (8.50)
.039
(1.00)
Min.
4° Typ.
.020 (.051) Min.
.022 (0.55)
.018 (0.45)
.035 (0.90)
.031 (0.80)
.100 (2.54) Typ.
.300 (7.62)
Typ.
.150 (3.81)
.130 (3.30)
18° Typ.
.014 (.35)
.010 (.25)
.347 (8.82)
.300 (7.62)
.150 (3.81)
.110 (2.79)
APPLICATIONS
• Instrumentation
– Thermocouple Switching
– Analog Multiplexing
• Reed Relay Replacement
• Programmable Logic Controllers
• Data Acquisition
• Test Equipment
DESCRIPTION
These SSRs (LH1541, 1 Form A) are SPST normally
open switches which can replace electromechanical
relays in many applications. The relays provide a low-
capacitance, high-voltage switch contact with high off-
resistance and low switch-offset voltage. These charac-
teristics, combined with high-speed actuation, result in
an SSR which is ideal for small signal and dc instrumen-
tation 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 photodiode
array, switch-control circuity, and low-capacitance MOS-
FET switches.
SMD
.343 (8.71)
.335 (8.51)
Pin one I.D.
.256 (6.50)
.248 (6.30)
.050 (1.27) typ.
.052 (1.33)
.048 (1.22)
.150 (3.81)
.130 (3.30)
.0098 (.25)
.0040 (.10)
.040 (1.016)
.020 (0.508)
.395 (10.03)
.375 (9.63)
.300 (7.62)
typ.
.039
(0.99)
min.
3° to 7°
18°
.012 (0.31)
.008 (0.20)
4°
.100 (2.54)
.315 (8.00)
min.
Part Identification
Part Number
LH1541AT1
LH1541AAB1
LH1541AAB1TR
Description
6-pin DIP, Tubes
6-pin SMD, Gullwing, Tubes
6-pin SMD, Gullwing, Tape and Reel
Document Number: 83834
Revision 17-August-01
www.vishay.com
3–159
Recommended Operating Conditions
50
40
30
20
10
0
–40
I
Fon
= 2.0 mA
I
Fon
= 3.0 mA
I
Fon
= 4.0 mA
I
Fon
=
5.0 to 20 mA
Absolute Maximum Ratings,
T
A
=25
°
C
Stresses in excess of the absolute Maximum Ratings can cause permanent
damage to the device. These are absolute stress ratings only. Functional oper-
ation 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.
Load Current (mA)
–20
0
20
40
60
Ambient Temperature (°C)
80
Ambient Temperature Range (
T
A
) .................................... –40 to +85
°
C
Storage Temperature Range (
T
stg
) ................................. –40 to +150
°
C
Pin Soldering Temperature (t=10 s max) (
T
S
) ............................. 260
°
C
Input/Output Isolation Voltage
(
V
RMS
t=1.0 s,
I
ISO
=10
µ
A max) (
V
ISO
) .............................. 5300 V
RMS
LED Continuous Forward Current (
I
F
) .........................................50 mA
LED Reverse Voltage (
I
R
≤
10
µ
A) (
V
R
)........................................... 8.0 V
DC or Peak AC Load Voltage (
I
L
≤
50
µ
A) (
V
L
) .............................. 200 V
Continuous DC Load Current (
I
L
)
Bidirectional Operation..............................................................55 mA
Unidirectional Operation............................................................ — mA
Peak Load Current (t=100 ms) (single shot) (
I
P
) ......................100 mA
Output Power Dissipation (continuous) (
P
DISS
)........................ 550 mW
Electrical Characteristics,
T
A
=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.
Parameter
Input
LED Forward Current, Switch Turn-on
LED Forward Current, Switch Turn-off
LED Forward Voltage
Output
ON-resistance
ac/dc: Pin 4 (±) to 6 (±)
dc: Pin 4, 6 (+) to 5 (±)
OFF-resistance
Off-state Leakage Current
I
Fon
I
Foff
V
F
—
0.1
1.10*
0.6
0.5
1.19*
2.0
—
1.45*
mA
mA
V
Ω
I
L
=100 mA, t=10 ms
V
L
±150 V
I
F
=10 mA
I
F
=5.0 mA,
I
L
=50 mA
I
F
=5.0 mA,
I
L
=100 mA
G
Ω
nA
µ
A
pF
I
F
=0 mA,
V
L
=±100 V
I
F
=0 mA,
V
L
=±100 V
I
F
=0 mA,
V
L
=±200 V
I
F
=0 mA,
V
L
=1.0 V
I
F
=0 mA,
V
L
=50 V
V
I
F
=5.0 mA
V
ISO
=1.0 V
I
F
=5.0 mA,
I
L
=50 mA
I
F
=5.0 mA,
I
L
=50 mA
Sym.
Min.
Typ.
Max.
Units
Test Conditions
R
ON
70
—
110
—
10000
0.4
—
4.8
36
0.15
160
—
—
200
1.0
—
—
—
R
OFF
—
0.5
—
—
Output Capacitance
Pin 4 to 6
Switch Offset
Transfer
Input/Output Capacitance
Turn-on Time
Turn-off Time
* I
F
=5.0 mA
—
—
—
—
—
C
ISO
t
on
t
off
—
—
—
0.8
0.12
0.3
—
0.25
0.25
pF
ms
ms
Document Number: 83834
Revision 17-August-01
www.vishay.com
3–160
Typical Performance Characteristics
Figure 1. LED Voltage vs. Temperature
1.6
LED Forward Current for Switch
Turn-on (%), Normalized to 25°C
Figure 4. LED Current for Switch Turn-on vs. Temperature
160
150
120
90
60
30
0
–30
–60
–40
–20
0
20
40
60
80
I
L
= 50 mA
1.5
LED Forward Voltage (V)
1.4
1.3
1.2
1.1
I
F
=1.0 mA
I
F
=2.0 mA
I
F
=5.0 mA
I
F
=10 mA
–20
I
F
=20 mA
I
F
=50 mA
1.0
–40
0
20
40
60
Ambient Temperature (°C)
80
Ambient Temperature (°C)
Figure 2. Current Limit vs. Temperature
40
I
F
= 5.0 mA
t = 5.0 ms
V
L
=
SEE ELEC. CHAR
.
Figure 5. On-resistance vs. Temperature
50
40
Change in ON-resistance (%)
Normalized to 25
°C
30
20
10
0
–10
–20
–30
I
L
= 50 mA
Change in Current Limit (%)
Normalized to 25°C
30
20
10
0
–10
–20
–30
–40
–40
–20
0
20
40
60
80
–40
–40
–20
0
20
40
60
80
Ambient Temperature (°C)
Ambient Temperature (°C)
Figure 3. LED Dropout Voltage vs. Temperature
1.20
I
L
= 100 mA
LED Forward Voltage (V)
1.15
TYP.
Figure 6. Switch Capacitance vs. Applied Voltage
6.0
5.0
Capacitance (pF)
4.0
3.0
2.0
1.0
0.0
0
10
20
30
40
50
60
70
80
90 100
Applied Voltage (V)
1.10
MIN.
1.05
1.00
0.95
–40
–20
0
20
40
60
80
Ambient Temperature (°C)
Document Number: 83834
Revision 17-August-01
www.vishay.com
3–161
Figure 7. Insertion Loss vs. Frequency
2.00
1.75
1.50
Insertion Loss (dB)
1.25
1.00
0.75
0.50
0.25
0
10
2
10
3
Frequency (Hz)
10
4
10
5
R
L
= 600
Ω
Figure 10. Switch Offset Voltage vs. Temperature
3.5
I
F
= 5.0 mA
3.0
Switch Offset Voltage (µV)
2.5
2.0
1.5
1.0
0.5
0
20
30
40
50
60
70
80
90
Ambient Temperature (°C)
Figure 8. Leakage Current vs. Applied Voltage
100
Off-state Leakage Current (pA)
90
80
70
60
50
40
30
20
10
0
0
50
100
150
200
250
300
350 400
Figure 11. Leakage Current vs. Applied Voltage at Elevated
Temperatures
270
Off-state Leakage Current (pA)
240
210
180
150
120
90
60
30
0
0
20
40
60
80
100 120 140 160 180 200
Load Voltage (V)
50°C
70°C
I
F
= 0 mA
T
A
= 25
°C
85°C
Load Voltage (V)
Figure 9. Output Isolation
100
80
Figure 12. Switch Breakdown Voltage vs. Temperature
8
Change in Breakdown Voltage (%)
Normalized to 25°C
10
4
10
5
10
6
10
7
6
4
2
0
–2
–4
–6
–8
–10
–40
–20
0
20
40
60
80
Isolation (dB)
60
V
P
=10 V
R
L
=50
Ω
40
20
0
10
2
10
3
Frequency (Hz)
Ambient Temperature (°C)
Document Number: 83834
Revision 17-August-01
www.vishay.com
3–162
Figure 13. Switch Offset Voltage vs. LED Current
0.6
0.5
0.4
0.3
0.2
0.1
0
0
5
10
15
20
25
LED Forward Current (mA)
Figure 16. Turn-on Time vs. LED Current
1.50
1.25
Turn-on Time (ms)
Switch Offset Voltage (µV)
1.00
0.75
+85°C
+25°C
–40°C
0.50
0.25
0
0
5
10
15
20
LED Forward Current (mA)
Figure 14. Turn-on Time vs. Temperature
70
60
Change in Turn-on Time (%)
Normalized to 25°C
50
40
30
20
10
0
–10
–20
–30
–40
–40
–20
0
20
40
60
80
Ambient Temperature (°C)
I
F
= 5.0 mA
I
L
= 50 mA
Figure 17. Turn-off Time vs. LED Current
40
–40°C
30
Turn-on Time (ms)
+85°C
+25°C
20
10
0
0
10
20
30
40
50
LED Forward Current (mA)
Figure 15. Turn-off Time vs. Temperature
160
140
Change in Turn-off Time (%)
Normalized to 25°C
120
100
80
60
40
20
0
–20
–40
–60
–80
–40
I
F
= 5.0 mA
I
L
= 50 mA
–20
0
20
40
60
80
Ambient Temperature (°C)
Document Number: 83834
Revision 17-August-01
www.vishay.com
3–163
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