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The MID400 is an optically isolated AC line-to-logic interface device. It is packaged in an 8-lead plastic DIP. The AC line voltage is monitored by two back-to-back GaAs LED diodes in series with an external resistor. A high gain detector circuit senses the LED current and drives the output gate to a logic low condition.
The MID400 has been designed solely for the use as an AC line monitor . It is recommended for use in any AC-to-DC control application where excellent optical isolation, solid state reliability, TTL compatibility, small size, low power, and low frequency operations are required.
MID400 Maximum Ratings
Rating
Value
Unit
EMITTER RMS Current
25
mA
DC Current
±30
mA
LED Power Dissipation @ TA= 25°C (PD)
45
mW
Derate above 70°C
2.0
mW/°C
DETECTOR Low Level Output Current (IOL)
20
mA
High Level Output Voltage(VOH)
7.0
V
Supply Voltage (VCC)
7.0
V
Detector Power Dissipation @ TA= 25°C (PD)
7.0
mW
Derate above 70°C
2.0
mW/°C
TOTAL DEVICE Storage Temperature
-55 to +125
°C
Operating Temperature
-40 to +85
°C
Lead Solder Temperature
260 for 10 sec
°C
Total Device Power Dissipation @ TA= 25°C (PD)
115
mW
Derate above 70°C
4.0
mW/°C
Steady State Isolation
2500
VRMS
MID400 Features
• Direct operation from any line voltage with the use of an external resistor. • Externally adjustable time delay • Externally adjustable AC voltage sensing level • High voltage isolation between input and output • Compact plastic DIP package • Logic level compatibility • UL recognized (File #E90700) • VDE recognized (file #102915), add option V (e.g., MID400V)
MID400 Typical Application
• Monitoring of the AC/DC "line-down" condition • "Closed-loop" interface between electromechanical elements such as solenoids, relay contacts, small motors, and microprocessors • Time delay isolation switch