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ICPL3700
AC/DC to Logic Interface Optocoupler
Circuit
Features
Description
Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
Switching Characteristics
Similar Optocouplers
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Circuit
Features
AC or DC Input
Logic Compatible Output
Thresholds Guaranteed over Temperature
Hysteresis
Programmable Sense Voltage
3000 Vdc Withstand Test Voltage
Description
The ICPL3700 is a voltage/current threshold detection optocoupler. This optocoupler uses an internal light
emitting diode, a threshold sensing input buffer IC, and a high gain photon detector to provide an
optocoupler which permits adjustable external threshold levels. The input buffer circuit has a nominal turn-on
threshold of 2.5 mA (Ith+) and 3.8 V (Vth+). The addition of one or more external attenuation resistors
permits the use of this device over a wide range of input voltages and currents. Threshold sensing prior to
the LED and detector elements minimises effects of different optical gain and LED variations over
operating life (CTR degradation). Hysteresis is also provided in the buffer for extra noise immunity and
switching stability. Surface Mount Option Available.
Absolute Maximum Ratings
Storage Temperature:
Operating Temperature:
Lead Soldering:
-55°C to +125°C
-25°C to +85°C
260°C for 10s, 1.6mm below seating plane
Input
Average Current IIN:
Surge Current IIN:
Peak Transient Current IIN:
Input Voltage VIN(Pins 2-3):
PowerDissipation:
Derate Linearly:
50mA (note 1)
140mA (note 1,2)
500mA (note 1,2)
-0.5V
230mW(note 3)
4.1mW/°C above 70°C free-air
Output Detector
Average Current IO:
Derate Linearly:
Output Voltage VO(Pins 6-5):
Supply Voltage VCC(Pins 8-5):
PowerDissipation:
Derate Linearly:
30mA
0.6mW/°C above 70°C free-air
-0.5to 20V
-0.5V to 20V
210mW (note 4)
3.9mW/°C above 70°C free-air
Package
Power Dissipation:
305mW (derate linearly 5.4mW/°C above 70°C free-air)
Recommended Operating Conditions
PARAMETER
SYMBOL
MIN
MAX
Supply Voltage
VCC
4.5
18
Operating Temperature
TA
0
70
Operating Frequency
f
0
4
Electrical Characteristics
(Over recommended temperature Ta= 0°C to 70°C u.o.s.; all typical values at Vcc=5V, Ta=25°C u.o.s.)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
NOTES
ITH+
Input Threshold Current
VCC=4.5V, VIN=VTH+,
VO=0.4V, IO>=4.2mA
1.96
2.5
3.11
mA
9
ITH-
VCC=4.5V, VIN=VTH-,
VO=2.4V, IOH<=0.1mA
1.00
1.3
1.62
mA
VTH+
VCC=4.5V, VIN=V2-V3, Pins 1
& 4 Open, VO=0.4V,
3.35
3.8
4.05
V
Input Threshold Voltage
DC (Pins 2,3)
IO>=4.2mA
VTH-
VCC=4.5V, VIN=V2-V3, Pins 1
& 4 Open, VO=2.4V,
IO<=0.1mA
2.01
2.6
2.86
V
VTH+
Input Threshold Voltage
AC (Pins 1,4)
VCC=4.5V, VIN=|V1-V4|, Pins
2 & 3 Open, VO=0.4V,
IO>=4.2mA
4.23
5.1
5.50
V
9,10
VTH-
VCC=4.5V, VIN=|V1-V4|, Pins
2 & 3 Open, VO=2.4V,
IO<=0.1mA
2.87
3.8
4.24
V
IHYS
Hysteresis
IHYS=ITH+-ITH-
1.2
mA
VHYS
VHYS=VTH+-VTH-
1.2
V
VIHC1
Input Clamp Voltage
VIHC1=V2-V3, V3=GND,
IIN=10mA, Pin 1 & 4
connected to 3
5.4
6.0
6.6
V
VIHC2
VIHC2=|V1-V4|, |IIN|=10mA,
Pins 2 & 3 Open
6.1
6.7
7.3
V
VIHC3
VIHC3=V2-V3, V3=GND,
IIN=15mA, Pins 1 & 4 Open
12.0
13.4
V
VILC
VILC=V2-V3, V3=GND, IIN=-
10mA
-0.76
V
IIN
Input Current
VIN=V2-V3=5.0V, Pin 1 & 4
Open
3.0
3.7
4.4
mA
VD1,2
Bridge Diode Forward
Voltage
IIN=3mA
0.59
V
VD3,4
0.74
V
VOL
Logic Low Output Voltage
VCC=4.5V, IOL=4.2mA
0.1
0.4
V
9
IOH
Logic High Output Current
VCC=VOH=18V
0.1
mA
9
ICCL
Logic Low Supply Current
VO=Open, VCC=V2-V3=5.0V
1.0
4
mA
ICCH
Logic High Supply Current
VO=Open, VCC=18V
2
nA
9
IIO
Input-Output Insulation
Leakage Current
RH=45%, TA=25°C, t=5s,
VIO=3000Vdc
1
µA
11
RIO
Input-Output Resistance
VIO=500Vdc
1000
Gohm
11
CIO
Input-Output Capacitance
f=1MHz, VIO=0
0.6
pF
11
CIN
Input Capacitance
f=1MHz, VIN=0, Pins 2 & 3,
Pins 1 & 4 Open
50
pF
Switching Characteristics (Ta=25°C, Vcc=5V)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
NOTES
tPHL
Propagation Delay Time to
Logic Low at Output
RL=4.7kohm, CL=30pF
4.0
15
µs
6
tPLH
Propagation Delay Time to
Logic High at Output
10.0
40
µs
6
tR
Output Rise (10-90%)
20
µs
tF
Output Fall Time (90-10%)
0.3
µs
CMH
Common Mode Transient
Immunity at Logic High Level
Output
RL=4.7kohm, VCMH=1400V,
IIN=0mA, VO(MIN)=2.0V
4000
V/µs
7,8
CML
Common Mode Transient
Immunity at Logic Low Level
Output
RL=4.7kohm, VCML=140V,
IIN=3.11mA, VO(MAX)=0.8V
-600
V/µs
7,8
Notes
1. Current into/out of any single lead
2. Surge input current duration is 3ms at 120Hz pulse repetition rate. Transient input current duration is
10µs at 120Hz pulse repetition rate. Maximum input power, Pin, must be observed.
3. Maximum input power dissipation of 230mW allows an input IC junction temperature of 125°C at an
ambient temperature of Ta=70°C with a typical thermal resistance from junction to ambient of
Øjai=240°C/W. Excessive Pin and Tj may result in IC chip degradation.
4. Maximum output power dissipation of 210mW allows an output IC junction temperature of 125°C at an
ambient temperature of Ta=70°C with a typical thermal resistance from junction to ambient of
Øjao=265°C/W.
5. Maximum operating frequency is defined when output waveform (Pin 6) obtains only 90% of Vcc with
Rl=4.7kohm, Cl=30pF using a 5V square wave input signal.
6. The tPHL (tPLH) propagation delay is measured from the 2.5V level of the leading (trailing) edge of a
5.0V input pulse, 1µs rise (fall) time, to the 1.5V level on the leading (trailing) edge of the output pulse.
7. Common mode transient immunity in Logic High (Low) Level is the maximum tolerable, positive
(negative), dVcm/dt on the leading (trailing) edge of the common mode pulse signal, Vcm, to ensure that the
output will remain in a Logic High (Low) state, ie. Vo>2.0V (Vo<0.8V).
8. In applications where dVcm/dt may exceed 50000V/µs (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 240ohm per volt of allowable drop in Vcc between Pin 8 and Vcc with a minimum value of
240ohm.
9. Logic low output level at Pin 6 occurs under the conditions of Vin>=Vth+ as well as the range 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-.
10. AC voltage is instantaneous voltage.
11. Device considered a two-terminal device: Pins 1,2,3,4 connected together, and Pins 5,6,7,8 connected
together.
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