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AC/DC to Logic Interface Optocouplers Technical Data
HCPL-0370 HCPL-3700 HCPL-3760
Features
* Standard (HCPL-0370/3700) and Low Input Current (HCPL-3760) Versions * AC or DC Input * Programmable Sense Voltage * Hysteresis * Logic Compatible Output * Thresholds Guaranteed over Temperature * Thresholds Independent of LED Optical Parameters * Recognized under UL 1577 and CSA Approved for Dielectric Withstand Proof Test Voltage of 3750 Vac, 1 Minute
Description
The HCPL-0370/3700 and HCPL-3760 are voltage/current threshold detection optocouplers. The HCPL-3760 is a low-current version of the HCPL-0370/3700. To obtain lower current operation, the HCPL-3760 uses a high-efficiency AlGaAs LED which provides higher light output at lower drive currents. The devices utilize threshold sensing input buffer ICs which permit control of threshold levels over a wide range of input voltages with a single external resistor.
HCPL-0370/3700/3760
The input buffer incorporates several features: hysteresis for extra noise immunity and switching immunity, a diode bridge for easy use with ac input signals, and internal clamping
Functional Diagram Applications
* Limit Switch Sensing * Low Voltage Detector * 5 V-240 V AC/DC Voltage Sensing * Relay Contact Monitor * Relay Coil Voltage Monitor * Current Sensing * Microprocessor Interfacing
AC 1 8 VCC
DC+ 2
7
NC
DC- 3
6
VO
AC 4
5
GND
TRUTH TABLE (POSITIVE LOGIC) INPUT OUTPUT L H H L
CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by ESD.
2
diodes to protect the buffer and LED from a wide range of overvoltage and over-current transients. Because threshold sensing is done prior to driving the LED, variations in optical coupling from the LED to the detector will have no effect on the threshold levels. The HCPL-0370/3700's input buffer IC has a nominal turn on threshold of 2.5 mA (ITH +) and 3.7 volts (VTH +).
The buffer IC for the HCPL-3760 was redesigned to permit a lower input current. The nominal turn on threshold for the HCPL-3760 is 1.2 mA (ITH +) and 3.7 volts (VTH +). The high gain output stage features an open collector output providing both TTL compatible
saturation voltages and CMOS compatible breakdown voltages. By combining several unique functions in a single package, the user is provided with an ideal component for industrial control computer input boards and other applications where a predetermined input threshold level is desirable.
Ordering Information
Specify Part Number followed by Option Number (if desired) Example HCPL-0370#XXXX No option = SO8 Package. 500 = Tape/Reel Package Option (1 K min.). XXXE = Lead Free Option.
HCPL-37x0#XXXX 020 = 5000 V rms/1 minute UL Rating Option. 300 = Gull Wing Surface Mount Option. 500 = Tape/Reel Package Option (1 K min.). XXXE = Lead Free Option. Option data sheets available. Contact your Agilent sales representative or authorized distributor for information.
Remarks: The notation "#" is used for existing products, while (new) products launched since 15th July 2001 and lead free option will use "-"
Schematic
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Package Outline Drawings
Standard DIP Package (HCPL-3700/3760)
9.40 (0.370) 9.90 (0.390) 8 7 A XXXX YYWW RU PIN ONE 1.19 (0.047) MAX. 1 2 3 4 UL RECOGNITION 6 5 TYPE NUMBER DATE CODE 6.10 (0.240) 6.60 (0.260) 7.36 (0.290) 7.88 (0.310) 0.20 (0.008) 0.33 (0.013)
5 TYP.
1.78 (0.070) MAX.
3.56 0.13 (0.140 0.005)
4.70 (0.185) MAX.
1 2
AC DC+ DCAC
VCC 8 NC 7 VO 6 GND 5
0.51 (0.020) MIN. 2.92 (0.115) MIN.
3 4
0.76 (0.030) 1.40 (0.056)
0.65 (0.025) MAX. 2.28 (0.090) 2.80 (0.110) DIMENSIONS IN MILLIMETERS AND (INCHES). NOTE: FLOATING LEAD PROTRUSION IS 0.25 mm (10 mils) MAX.
Gull Wing Surface Mount Option 300 (HCPL-3700/3760)
LAND PATTERN RECOMMENDATION 9.65 0.25 (0.380 0.010)
8 7 6 5
1.016 (0.040)
TYPE NUMBER DATE CODE A XXXX YYWW RU 6.350 0.25 (0.250 0.010) 10.9 (0.430)
MOLDED
1
2
3
4
UL RECOGNITION
1.27 (0.050)
2.0 (0.080)
1.19 (0.047) MAX.
1.780 (0.070) MAX.
9.65 0.25 (0.380 0.010) 7.62 0.25 (0.300 0.010) 0.20 (0.008) 0.33 (0.013)
3.56 0.13 (0.140 0.005)
1.080 0.320 (0.043 0.013) 2.540 (0.100) BSC
0.635 0.130 (0.025 0.005)
0.635 0.25 (0.025 0.010) 12 NOM.
DIMENSIONS IN MILLIMETERS (INCHES). TOLERANCES (UNLESS OTHERWISE SPECIFIED): xx.xx = 0.01 xx.xxx = 0.005 LEAD COPLANARITY MAXIMUM: 0.102 (0.004) NOTE: FLOATING LEAD PROTRUSION IS 0.25 mm (10 mils) MAX.
4
Package Outline Drawings, continued
Small Outline SO-8 Package (HCPL-0370)
LAND PATTERN RECOMMENDATION
8
7
6
5
3.937 0.127 (0.155 0.005)
XXX YWW
5.994 0.203 (0.236 0.008) TYPE NUMBER (LAST 3 DIGITS) DATE CODE
4
7.49 (0.295)
PIN ONE 1 0.406 0.076 (0.016 0.003)
2
3
1.9 (0.075)
1.270 BSC (0.050)
0.64 (0.025)
* 5.080 0.127 (0.200 0.005)
7
45 X
0.432 (0.017)
3.175 0.127 (0.125 0.005)
0 ~ 7 1.524 (0.060) 0.203 0.102 (0.008 0.004)
0.228 0.025 (0.009 0.001)
* TOTAL PACKAGE LENGTH (INCLUSIVE OF MOLD FLASH)
5.207 0.254 (0.205 0.010) DIMENSIONS IN MILLIMETERS (INCHES). LEAD COPLANARITY = 0.10 mm (0.004 INCHES) MAX.
0.305 MIN. (0.012)
NOTE: FLOATING LEAD PROTRUSION IS 0.15 mm (6 mils) MAX.
5
Solder Reflow Thermal Profile
300
PREHEATING RATE 3C + 1C/-0.5C/SEC. REFLOW HEATING RATE 2.5C 0.5C/SEC. PEAK TEMP. 245C PEAK TEMP. 240C PEAK TEMP. 230C 2.5C 0.5C/SEC. 160C 150C 140C 3C + 1C/-0.5C 30 SEC. 30 SEC. SOLDERING TIME 200C
TEMPERATURE (C)
200
100
PREHEATING TIME 150C, 90 + 30 SEC. 50 SEC. TIGHT TYPICAL LOOSE
ROOM TEMPERATURE
0
0
50
100
150
200
250
TIME (SECONDS)
Recommended Pb-Free IR Profile
tp Tp TL 260 +0/-5 C 217 C RAMP-UP 3 C/SEC. MAX. 150 - 200 C RAMP-DOWN 6 C/SEC. MAX. TIME WITHIN 5 C of ACTUAL PEAK TEMPERATURE 20-40 SEC.
TEMPERATURE
Tsmax Tsmin
ts PREHEAT 60 to 180 SEC. 25 t 25 C to PEAK
tL
60 to 150 SEC.
TIME NOTES: THE TIME FROM 25 C to PEAK TEMPERATURE = 8 MINUTES MAX. Tsmax = 200 C, Tsmin = 150 C
Regulatory Information
The HCPL-0370/3700/3760 has been approved by the following organizations: UL Recognized under UL 1577, component recognition program, File E55361 (HCPL-0370 pending). CSA Approved under CSA Component Acceptance Notice #5, File CA 88324.
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Insulation and Safety Related Specifications
8-Pin DIP (300 mil) Value 7.1 7.4 0.08 SO-8 Value 4.9 4.8 0.08
Parameter Min.. External Air Gap (External Clearance) Min.. External Tracking Path (External Creepage) Min.. Internal Plastic Gap (Internal Clearance)
Symbol L(IO1) L(IO2)
Units mm mm mm
Conditions Measured from input terminals to output sterminals, hortest distance through air Measured from input terminals to output terminals, shortest distance path along body Through insulation distance, conductor to conductor, usually the direct distance between the photoemitter and photodetector inside the optocoupler cavity DIN IEC 112/VDE 0303 PART 1
Tracking Resistance (Comparative Tracking Index) Isolation Group
CTI
200
200
V
IIIa
Material Group (DIN VDE 0110, 1/89, Table 1)
Absolute Maximum Ratings (No derating required up to 70C)
Parameter Storage Temperature Operating Temperature Lead Soldering Cycle Input Current Symbol TS TA Temperature Time Average Surge Transient HCPL-3700/3760 HCPL-0370 HCPL-3700/3760 HCPL-0370 HCPL-3700/3760 HCPL-0370 Average Min. -55 -40 Max. 125 85 260 10 50 140 500 Units C C C s mA V mW mW mW mA V V Note
1 2 2, 3
IIN VIN PIN -0.5
Input Voltage (Pins 2-3) Input Power Dissipation Total Package Power Dissipation Output Power Dissipation Output Current Supply Voltage (Pins 8-5) Output Voltage (Pins 6-5) Solder Reflow Temperature Profile
230 172 PT 305 275 PO 210 103 IO 30 VCC -0.5 20 VO -0.5 20 See Package Outline Drawings section
4 5 6 7
Recommended Operating Conditions
Parameter Supply Voltage Operating Temperature Operating Frequency Symbol VCC TA f Min. 2 0 0 Max. 18 70 4 Units V C kHz 8 Note
7
Electrical Specifications
Over Recommended Temperature TA = 0C to 70C, Unless Otherwise Specified.
Parameter Input Threshold Current Sym. Device HCPL-3760 HCPL-3760 Input DC VTH+ Threshold (Pins 2, 3) Voltage VTHMin. Typ.[9] Max. Units 2.5 1.2 1.3 0.6 3.7 3.11 1.56 1.62 0.80 4.05 V mA 0.87 0.43 3.35 Conditions VIN = VTH+; VCC = 4.5 V; VO = 0.4 V; IO 4.2 mA VIN = VTH-; VCC = 4.5 V; VO = 2.4 V; IOH 100 A VIN = V2 - V3; Pins 1 & 4 Open VCC = 4.5 V; VO = 0.4 V; IO 4.2 mA VIN = V2 - V3; Pins 1 & 4 Open VCC = 4.5 V; VO = 2.4 V; IO 100 A VIN = |V1 - V4|; Pins 2 & 3 Open VCC = 4.5 V; VO = 0.4 V; IO 4.2 mA VIN = |V1 - V4|; Pins 2 & 3 Open VCC = 4.5 V; VO = 2.4 V; IO 100 A IHYS = ITH+ - ITHVHYS = VTH+ - VTHVIHC1 = V2 - V3; V3 = GND; IIN = 10 mA; Pins 1 & 4 Connected to Pin 3 VIHC2 = |V1 - V4|; |IIN| = 10 mA; Pins 2 & 3 Open VIHC3 = V2 - V3; V3 = GND; IIN = 15 mA; Pins 1 & 4 Open VILC = V2 - V3; V3 = GND; IIN = -10 mA VIN = V2 - V3 = 5.0 V Pins 1 & 4 Open IIN = 3 mA IIN = 1.5 mA IIN = 3 mA IIN = 1.5 mA 0.4 100 1.2 0.7 0.002 50 4 3 4 A pF V A mA VCC = 4.5 V; IOL = 4.2 mA VOH = VCC = 18 V V2 - V3 = 5.0 V; VO = Open; VCC = 5.0 V VCC = 18 V; VO = Open f = 1 MHz; VIN = 0 V, Pins 2 & 3, Pins 1 & 4 Open 4 14 6 5 14 14 5 1 2 14, 15 Fig. Note 2, 3 14 ITH+ HCPL-0370/3700 1.96 ITH- HCPL-0370/3700 1.00
2.01
2.6
2.86
V
AC VTH+ (Pins 1, 4)
4.23
4.9
5.50
V
VTH-
2.87
3.7
4.20
V
Hysteresis
IHYS HCPL-0370/3700 HCPL-3760 VHYS
1.2 0.6 1.2 5.4 6.0 6.6
mA V V
Input Clamp Voltage
VIHC1
VIHC2
6.1
6.7
7.3
V
VIHC3 VILC Input Current Bridge Diode Forward Voltage IIN HCPL-0370/3700 HCPL-3760 VD1,2 HCPL-0370/3700 HCPL-3760 VD3,4 HCPL-0370/3700 HCPL-3760 Logic Low Output Voltage Logic High Output Current Logic Low Supply Current Logic High Supply Current Input Capacitance VOL IOH ICCL HCPL-0370/3700 HCPL-3760 ICCH CIN 3.0 1.5
12.0 -0.76 3.7 1.8 0.59 0.51 0.74 0.71 0.1
13.4
V V
4.4 2.2
mA V
8
Switching Specifications
TA = 25C, VCC = 5.0 V, Unless Otherwise Specified.
Parameter Propagation Delay Time to Logic Low at Output Propagation Delay Time to Logic High at Output Sym. Device HCPL-0370/3700 tPHL HCPL-3760 HCPL-0370/3700 tPLH HCPL-3760 HCPL-0370/3700 Output Rise Time (10-90%) tr HCPL-3760 HCPL-0370/3700 Output Fall Time (90-10%) Common Mode Transient Immunity at Logic High Output Common Mode Transient Immunity at Logic Low Output tf HCPL-3760 0.4 IIN = 0 mA, RL = 4.7 k, VO min = 2.0 V, VCM = 1400 V 9, 11 HCPL-0370/3700 |CML| HCPL-3760 600 V/s IIN = 1.56 mA IIN = 3.11 mA RL = 4.7 k, VO max = 0.8 V, VCM = 140 V 12, 13 14 8 0.3 s RL = 4.7 k, CL = 30 pF 8.0 20 s RL = 4.7 k, CL = 30 pF 4.5 7, 10 10.0 40.0 s RL = 4.7 k, CL = 30 pF 11 Min. Typ. 4.0 15.0 s RL = 4.7 k, CL = 30 pF 10 Max. Units Test Conditions Fig. Note
|CMH|
4000
V/s
Package Characteristics
Over Recommended Temperature TA = 0C to 70C, Unless Otherwise Specified. Parameter Input-Output Momentary Withstand Voltage* Option 020 Input-Output Resistance Input-Output Capacitance Sym. VISO Min. Typ.[9] Max. Units 3750 5000 RI-O CI-O 1012 0.6 pF VI-O = 500 Vdc f = 1 MHz; VI-O = 0 Vdc V rms Conditions RH 50%, t = 1 min; TA = 25C Fig. Note 16, 17 18 16
*The Input-Output Momentary Withstand Voltage is a dielectric voltage rating that should not be interpreted as an input-output continuous voltage rating. For the continuous voltage rating refer to the IEC/EN/DIN EN 60747-5-2 Insulation Characteristics Table (if applicable), your equipment level safety specification, or Agilent Application Note 1074, "Optocoupler Input-Output Endurance Voltage."
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Notes: 1. Measured at a point 1.6 mm below seating plane. 2. Current into/out of any single lead. 3. Surge input current duration is 3 ms at 120 Hz pulse repetition rate. Transient input current duration is 10 s at 120 Hz pulse repetition rate. Note that maximum input power, PIN, must be observed. 4. Derate linearly above 70C free-air temperature at a rate of 4.1 mW/C (HCPL-3700/3760) and 3.1 mW/C (HCPL-0370). Maximum input power dissipation of 230 mW (HCPL-3700/3760) and 172 mW (HCPL-0370) allows an input IC junction temperature of 125C at an ambient temperature of TA = 70C. Excessive PIN and TJ may result in IC chip degradation. 5. Derate linearly above 70C free-air temperature at a rate of 5.4 mW/C (HCPL-3700/3760) and 5 mW/C (HCPL-0370). 6. Derate linearly above 70C free-air temperature at a rate of 3.9 mW/C (HCPL-3700/3760) and 1.9 mW/C (HCPL-0370). Maximum output power dissipation of 210 mW (HCPL-3700/3760) and 103 mW (HCPL-0370) allows an output IC junction temperature of 125C at an ambient temperature of TA = 70C. 7. Derate linearly above 70C free-air temperature at a rate of 0.6 mA/C. 8. Maximum operating frequency is defined when output waveform Pin 6 obtains only 90% of VCC with RL = 4.7 k, CL = 30 pF using a 5 V square wave input signal. 9. All typical values are at TA = 25C, VCC = 5.0 V unless otherwise stated. 10. The tPHL propagation delay is measured from the 2.5 V level of the leading edge of a 5.0 V input pulse (1 s rise time) to the 1.5 V level on the leading edge of the output pulse (see Figure 10). 11. The tPLH propagation delay is measured from the 2.5 V level of the trailing edge of a 5.0 V input pulse (1 s fall time) to the 1.5 V level on the trailing edge of the output pulse (see Figure 10). 12. Common mode transient immunity in Logic High level is the maximum tolerable (positive) dVCM/dt on the leading edge of the common mode pulse, VCM, to insure that the output will remain in a Logic High state (i.e., VO > 2.0 V). Common mode transient immunity in Logic Low level is the maximum tolerable (negative) dVCM/dt on the trailing edge of the common mode pulse signal, VCM, to insure that the output will remain in a Logic Low state (i.e., VO < 0.8 V). See Figure 11. 13. In applications where dVCM/dt may exceed 50,000 V/s (such as static discharge), a series resistor, RCC, should be included to protect the detector IC from destructively high surge currents. The recommended value for RCC is 240 per volt of allowable drop in VCC (between Pin 8 and VCC) with a minimum value of 240 . 14. Logic low output level at Pin 6 occurs under the conditions of VIN VTH+ as well as the range of VIN > VTH- once VIN has exceeded VTH+. Logic high output level at Pin 6 occurs under the conditions of VIN VTH- as well as the range of VIN < VTH+ once VIN has decreased below VTH-. 15. AC voltage is instantaneous voltage. 16. Device considered a two terminal device: Pins 1, 2, 3, 4 connected together, and Pins 5, 6, 7, 8 connected together. 17. In accordance with UL 1577, each optocoupler is proof tested by applying an insulation test voltage 4500 V rms for 1 second (leakage detection current limit, Ii-o 5 A). 18. In accordance with UL 1577, each optocoupler is proof tested by applying an insulation test voltage 6000 V rms for 1 second (leakage detection current limit, Ii-o 5 A). This test is performed before the 100% production test for partial discharge (Method b) shown in the IEC/EN/DIN EN 60747-5-2 Insulation Characteristics Table.
DEVICE ITH VTH(dc) VTH(ac)
TH+
TH-
INPUT CONNNECTION PINS 2, 3 OR 1, 4 PINS 2, 3 PINS 1, 4
HCPL-0370/3700 2.5 mA 1.3 mA HCPL-3760 1.2 mA 0.6 mA ALL ALL 3.7 V 4.9 V 2.6 V 3.7 V
Figure 1. Typical Input Characteristics, IIN vs. VIN (AC Voltage is Instantaneous Value).
Figure 2. Typical Transfer Characteristics.
10
HCPL-0370/3700 4.2 4.0
VTH - VOLTAGE THRESHOLD - V
HCPL-3760
3.0
ITH - CURRENT THRESHOLD - mA VTH - VOLTAGE THRESHOLD - V
4.0 3.8 3.6 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 -40 -25 0 25 50 75 85 TA - TEMPERATURE - C ITHVTHITH+ VTH+
1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4
ITH - CURRENT THRESHOLD - mA
3.8 3.6 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 -40 -20 0 20 40 60 80 TA - TEMPERATURE - C ITHVTHITH+ VTH+
2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8
ICCH - HIGH LEVEL SUPPLY CURRENT - A
3.2
4.2
1.6
100
10-1
10-2
ICCH VCC = 18 V VO = OPEN IIN = 0 mA
ICCH
10-3
10-4
10-5 -40 -25 0 25 50 75 85 TA - TEMPERATURE - C
Figure 3. Typical DC Threshold Levels vs. Temperature.
Figure 4. Typical High Level Supply Current, ICCH vs. Temperature.
HCPL-0370/3700 4.2 4.0 3.8
IIN - INPUT CURRENT - mA
HCPL-3760
240
VOL - LOW LEVEL OUTPUT VOLTAGE - mV
2.1 2.0 1.9
IIN - INPUT CURRENT - mA
240 220 200 180 IIN VIN = 5.0 V (PINS 2, 3) VCC = 5.0 V VOL VCC = 5.0 V IOL = 4.2 mA 160 140 120 100 80 60 40 20 0 -40 -25 0 25 50 75 85 TA - TEMPERATURE - C
VOL - LOW LEVEL OUTPUT VOLTAGE - mV
220 200 IIN VIN = 5.0 V (PINS 2, 3) VCC = 5.0 V VOL VCC = 5.0 V IOL = 4.2 mA 180 160 140 120 100 80 60 40 20 0 -40 -20 0 20 40 60 80 TA - TEMPERATURE - C
3.6 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8
1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 0.9
Figure 5. Typical Input Current, IIN, and Low Level Output Voltage, VOL, vs. Temperature.
HCPL-0370/3700
HCPL-3760
ICCL - LOGIC LOW SUPPLY CURRENT - mA
ICCL - LOGIC LOW SUPPLY CURRENT - mA
4.00 3.50 3.00 2.50 2.00 1.50 1.00 0.50 0 4.0
3.00
2.50
2.00
1.50
1.00
0.50
6.0
8.0
10.0 12.0 14.0 16.0 18.0 20.0
0 4.0
6.0
8.0
10.0 12.0 14.0 16.0 18.0 20.0
VCC - SUPPLY VOLTAGE - V
VCC - SUPPLY VOLTAGE - V
Figure 6. Typical Logic Low Supply Current vs. Supply Voltage.
11
HCPL-0370/3700 24 22 RL = 4.7 k CL = 30 pF VCC = 5.0 V 5.0 V VIN = 1 ms PULSE WIDTH f = 100 Hz tr, tf = 1 s (10-90%)
HCPL-3760 24 22
tp - PROPAGATION DELAY - s
tp - PROPAGATION DELAY - s
20 18 16 14 12 10 8 6 4 2 0
20 18 16 14 12 10 8 6 4 2
tPLH
RL = 4.7 k CL = 30 pF VCC = 5.0 V 5.0 V VIN = 1 ms PULSE WIDTH f = 100 Hz tr, tf = 1 s (10-90%)
tPLH
tPHL
tPHL
-40
-20
0
20
40
60
80
0 -40 -25 0 25 50 75 85 TA - TEMPERATURE - C
TA - TEMPERATURE - C
Figure 7. Typical Propagation Delay vs. Temperature.
HCPL-0370/3700 60 RL = 4.7 k CL = 30 pF VCC = 5.0 V 5.0 V VIN = 1 ms PULSE WIDTH f = 100 Hz tr, tf = 1 s (10-90%) 600
HCPL-3760 30 700
50 tr - RISE TIME - s
500 tf - FALL TIME - ns
25
tr - RISE TIME - s
600
tf - FALL TIME - ns
40
400
20
500
30 tr 20 tf
300
15
tf
400 RL = 4.7 k CL = 30 pF VCC = 5.0 V 5.0 V 1 ms PULSE WIDTH f = 100 Hz tr, tf = 1 s (10-90%) 25 50 75 85
200
10 tr VIN =
300
10
100
5
200
0 -40 -20 0 20 40 60 80 TA - TEMPERATURE - C
0
0 -40 -25 0 TA - TEMPERATURE - C
100
Figure 8. Typical Rise, Fall Times vs. Temperature.
CM - COMMON MODE TRANSIENT IMMUNITY - V/ s
5000 VCC = 5.0 V IIN = 3.11 mA (0370/3700) IIN = 1.53 mA (3760) VOL = 0.8 V RL = 4.7 k TA = 25 C
4000
3000 CML VCC = 5.0 V IIN = 0 mA VOH = 2.0 V RL = 4.7 k TA = 25 C CMH
2000
1000 500 0 0 400
800
1200
1600
2000
VCM - COMMON MODE TRANSIENT AMPLITUDE - V
Figure 9. Common Mode Transient Immunity vs. Common Mode Transient Amplitude.
12
HCPL-0370/3700/3760
Figure 10. Switching Test Circuit.
HCPL-0370/3700/3760
(0370/3700)
Figure 11. Test Circuit for Common Mode Transient Immunity and Typical Waveforms.
HCPL-0370/3700
VTH+ = 3.7 V VTH- = 2.6 V VTH+ = 4.9 V VTH- = 3.7 V ITH+ = 2.5 mA ITH- = 1.3 mA TA = 25 C
Figure 12. Typical External Threshold Characteristics, V vs. RX.
13
Figure 13. External Threshold Voltage Level Selection.
For two specifically selected external threshold voltage levels, V+ and V-, the use of RX and RP will permit this selection via equations (2), (3) provided the following conditions are met. If the denominator of equation (2) is positive, then V+ V VTH+ VTHand V+ - VTH+ V- - VTH< ITH+ ITH-
Electrical Considerations
The HCPL-0370/3700/3760 optocouplers have internal temperature compensated, predictable voltage and current threshold points which allow selection of an external resistor, RX, to determine larger external threshold voltage levels. For a desired external threshold voltage, V , a corresponding typical value of RX can be obtained from Figure 12. Specific calculation of RX can be obtained from Equation (1). Specification of both V+ and V- voltage threshold levels simultaneously can be obtained by the use of RX and RP as shown in Figure 13 and determined by Equations (2) and (3). RX can provide over-current transient protection by limiting input current during a transient condition. For monitoring contacts of a relay or switch, the HCPL-0370/3700/3760 in combination with RX and RP can be used to allow a specific current to be conducted through the contacts for cleaning purposes (wetting current). The choice of which input voltage clamp level to choose depends upon the application of this device (see Figure 1). It is recommended that the low clamp condition be used when possible. The low clamp condition in conjunction with the low input current feature will ensure extremely low input power dissipation. In applications where dVCM/dt may be extremely large (such as static discharge), a series resistor, RCC, should be connected in series with VCC and Pin 8 to protect the detector IC from destructively high surge currents. See Note 13 for determination of RCC. In addition, it is recommended that a ceramic disc bypass capacitor of 0.01 F be placed between Pins 8 and 5 to reduce the effect of power supply noise. For interfacing ac signals to TTL systems, output low pass filtering can be performed with a pullup resistor of 1.5 k and 20 F capacitor. This application requires a Schmitt trigger gate to avoid slow rise time chatter problems. For ac input applications, a filter capacitor can be placed across the dc input terminals for either signal or transient filtering. Either ac (Pins 1, 4) or dc (Pins 2, 3) input can be used to determine external threshold levels. For one specifically selected external threshold voltage level V+ or V-, RX can be determined without use of RP via V+ - VTH+ (-) (-) RX = (1) ITH+ (-)
Conversely, if the denominator of equation (2) is negative, then V+ V VTH+ VTHand V+ - VTH+ V- - VTH> ITH+ ITH-
RX =
VTH- (V+) - VTH+ (V-) ITH+ (VTH-) - ITH- (VTH+)
(2)
VTH- (V+) - VTH+ (V-) RP = (3) ITH+(V--VTH-)+ITH-(VTH+-V+)
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For product information and a complete list of distributors, please go to our web site. For technical assistance call: Americas/Canada: +1 (800) 235-0312 or (916) 788-6763 Europe: +49 (0) 6441 92460 China: 10800 650 0017 Hong Kong: (+65) 6756 2394 India, Australia, New Zealand: (+65) 6755 1939 Japan: (+81 3) 3335-8152 (Domestic/International), or 0120-61-1280 (Domestic Only) Korea: (+65) 6755 1989 Singapore, Malaysia, Vietnam, Thailand, Philippines, Indonesia: (+65) 6755 2044 Taiwan: (+65) 6755 1843 Data subject to change. Copyright (c) 2004 Agilent Technologies, Inc. Obsoletes 5989-0785EN December 20, 2004 5989-2101EN

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Price & Availability of HCPL-3760-300

	To Download HCPL-3760-300 Datasheet File
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