OPTEK Technology
Optek reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPTEK Technology Inc.— 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (800) 341-4747 FAX: (972) 323– 2396 sensors@optekinc.com www.optekinc.com
A subsidiary of
TT elect r oni c s plc
Issue A 07.04
High Speed, High Voltage
Optical Isolator
OPI1268
• TTL Compatible Output
• 16KV Isolation
• 2Mbd Transfer Rate
• Creepage Path: 0.970” (24.64mm)
• Air Path: 0.970” (24.64mm)
• Low Propagation Delay Time
The OPI1268 is a high voltage isolator wi th a digital output which is capable of high speed data transmission.
This device is capable of DC and AC voltage isolation between the input and output circuitry while providing
TTL signal integrity.
The input of the OPI1268 consists of a high efficiency G aAlAs LED which is optically coupled to the output opti-
cal IC. A photodiode in the output IC detects the incoming modulated light and converts it to a proportionate
current. This current is fed into a high gain, linear amplifier which is temperature, current and voltage compen-
sated. The result is a highly stable digital output in an open collector inverter configuration.
Applications include:
• High Voltage Isolation
• PCBoard Power System Isolation
• Industrial Equipment Power Isolation
• Medical Equipment Power Isolation
Product Photo Here
Ordering Information
Please order part number OPI1268
OPTEK Technology
OPTEK Technology Inc.— 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (800) 341-4747 FAX: (972) 323– 2396 sensors@optekinc.com www.optekinc.com
Issue A 07.04
Page 2 of 7
High Speed, High Voltage Optical Isolator
OPI1268
Absolute Maximum Ratings (TA = 25o C unless otherwise note d)
Storage T emper at ure -40° C t o +1 00 ° C
Lead Soldering Temperature (1/16” (1.6mm) from case for 5 seconds with solder ing iron ) 260° C (1)
Operating T emperature -40° C to +100° C
Input-to-Output Isolation Voltage 16KVDC(2)
LED
Forward Current 50 mA
Power Dissipation 100 mW
Reverse DC Voltage 3.0 V
Peadk Forward currnet (2 µs puls e width, 0.1% Duty Cycle) 3.0 A
Notes:
(1) RMA flux is recommended. The duration can be extended to 10 seconds maximum when flow soldering.
(2) Measured with the input leads and the output leads shorted together. Typical input/output capacitance is 0.05pF.
(3) Measured with a 1µs pulse width, 300pps.
Output IC –Photologic®
Supply Voltage Range -0.5V to 7.0V
Power Dissipation 40 mW
Output Current 25 mA
Output Voltage Range -0.5V to 18.0V
SYMBOL PARAMETER MIN TYP MAX UNITS TEST CONDITION
Input Diode
VF Forward Voltage 1.3 1.6 V IF = 20mA
IR Reverse Current 100 µA VR = 3.0V
Output IC (VCC = 4.5V to 5.5V)
IOH High Level Output Current 0.25 15 µA IF = 0mA, VCC = 5.25V, VOH = 18.0V
VOL Low Level Output Voltage 0.4 0.5 V IF = 10mA, VCC = 4.5V, IOL = 8.0mA
ICCH High Level Supply Current 2.5 7 mA IF = 0mA, VCC = 5.25V
ICCL Low Level Supply Current 6 10 mA IF = 10mA , VCC = 5.25V
CIO Coupling Capacitance 2.0 pF Input and output leads shorted.
tPLH Propagation Delay—Low to High 100 ns See Figures 1 & 2
tPHL Propagation Delay—High to Low 200 ns See Figures 1 & 2
IISO Isolation Leakage Current 1.0 µA VISO = 7KV(RMS), input and output
leads shorted
Coupled Characteristics (VCC = 5V)
tPHL- tPLH Difference in Propagation Delays 100 ns See Figures 1 & 2
IF+ LED Positive Going Threshold Current 0.9 4.0 10.0 mA VCC = 5V, IOL = 8.0mA
Electrical Characteristics (TA = 25o C unless otherwise noted)
OPTEK Technology
OPTEK Technology Inc.— 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (800) 341-4747 FAX: (972) 323– 2396 sensors@optekinc.com www.optekinc.com
High Speed, High Voltage Optical Isolator
OPI1268
Issue A 07.04
Page 3 of 7
VOL vs. Ambient Temperature
0.00
0.10
0.20
0.30
0.40
0.50
0.60
-40-200 20406080100
Ta - Ambient Temperature - °C
VOL - Low Output Voltage - V
Vcc = 4.50 V
IOL = 8 mA
IF = 10 mA
ICCH & ICCL vs. Ambient Temperature
0
1
2
3
4
5
6
7
8
9
10
-40-200 20406080100
Ta - Ambient Temperature - °C
Supply Current - mA
ICCH
Vcc=5.25 V
IF = 0 mA
ICCL
Vcc = 5.25 V
IF = 10 mA
OPTEK Technology
OPTEK Technology Inc.— 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (800) 341-4747 FAX: (972) 323– 2396 sensors@optekinc.com www.optekinc.com
High Speed, High Voltage Optical Isolator
OPI1268
Issue A 07.04
Page 4 of 7
V(out) vs IF
0.0
1.0
2.0
3.0
4.0
5.0
6.0
012345
IF- Forward Current - mA
V(out) - Voltage Low Output - V
Vcc = 5.0 V
IOL = 8 mA
Ta = 25 °C
IOH vs. Ambient Temperature
0
1
2
3
4
5
6
7
8
-40 -20 0 20 40 60 80 100
Ta - Ambient Temperature - °C
IOH - µA
Vcc = 5.0 V
VOH = 18.0 V
OPTEK Technology
OPTEK Technology Inc.— 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (800) 341-4747 FAX: (972) 323– 2396 sensors@optekinc.com www.optekinc.com
High Speed, High Voltage Optical Isolator
OPI1268
Issue A 07.04
Page 5 of 7
dV/dT
IF(+) vs Ta
0
2
4
6
8
10
-40-200 20406080100
Ta - Ambient Temperature - °C
IF - Forward Curren t - mA
VCC = 5.0 V
IOL = 8.0 mA
OPI1268 dV/dT Sensor
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
Time (ns)
Volts
O PI1 268 On (Spec 2 V olts)
O PI1 268 Off (Spec 0.8 V olts)
Pulse Leading E dge
2,000 volts Peak-Peak
Rise or Fall Time 20 ns 1 0% -90%
Pulse Trailing E dge
2,000 volts Peak-Peak
Rise or Fall Time 20 ns 1 0%-90%
OPI1268 dV/dT E mitter
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
Time (ns)
Volts
OPI1 268 Off (Spec 0.8 V olts)
OPI1 268 On (Spec 2 V olts)
Pulse Leading E dge
2,000 volts Peak-Peak
Rise or Fall Time 20 ns 1 0% -90%
Pulse Trailing E dge
2,000 volts Peak-Peak
Rise or Fall Time 20 ns 1 0% -90%
OPTEK Technology
OPTEK Technology Inc.— 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (800) 341-4747 FAX: (972) 323– 2396 sensors@optekinc.com www.optekinc.com
High Speed, High Voltage Optical Isolator
OPI1268
Issue A 07.04
Page 6 of 7
Figure 1: Propagation Delay Test Schematic Figure 2: Input/Output Waveforms
Propogation Delay vs Ambient Temperature
0
20
40
60
80
100
120
140
160
180
200
-40-200 20406080100
Ta - Ambient Temperature - °C
Propogation Delay - ns
Vcc=5.25
IF=10mA
RL=560ohm
FREQ=100KHZ
TPLH
TPH
OPTEK Technology
OPTEK Technology Inc.— 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (800) 341-4747 FAX: (972) 323– 2396 sensors@optekinc.com www.optekinc.com
High Speed, High Voltage Optical Isolator
OPI1268
Issue A 07.04
Page 7 of 7
Mechanical Dimensions:
