IL388

Maximum Forward Diode Voltage : 2.1 V
Maximum Reverse Diode Voltage : 3 V
Maximum Input Diode Current : 30 mA
Maximum Power Dissipation : 250 mW
Maximum Operating Temperature : + 75 C
Input Type : AC/DC
Minimum Operating Temperature : 0 C
Package / Case : SOP-8
Packaging : Tube


Features:

• 2.3 mm High SMD package
• High sensitivity (K1) at low operating LED current
• Couples AC and DC signals
• Low input-output capacitance
• Isolation test voltage, 2500 VRMS, 1 second
• Low distortion, below -80 db
• 0.4 mm internal insulation thickness




Application

Optical DAA for V.34 FAX/Modem PCMCIA cards Digital telephone line isolation




Pinout






Specifications

Parameter	Test condition	Symbol	Value	Unit
Reverse voltage		VR	3.0	V
Forward current		IF	30	mA
Surge current (pulse width < 10 µs)		IPK	150	mA
Power dissipation		Pdiss	150	mW
Derate linearly from 25 °C			2.0	mW/°C
Junction temperature		Tj	100	°C

Description

The IL388 family of linear optocoupler consist of an IRLED optically coupled to two photodiodes. The emitter is located such that both photodiodes receive approximately an equal amount of infrared light. The diodes produce a proportional amount of photocurrents.

The ratio of the photocurrents stays constant with high accuracy when either the LED current changes or the ambient temperature changes. Thus one of IL388 can control the output photodiode current.