UL recognized (File #E90700)
VDE recognized (file #102915), – add option V
■
(e.g., MID400V)
Description
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
AC-to-DC control application where excellent optical isolation, solid state reliability, TTL compatibility, small size,
low power, and low frequency operations are required.
. It is recommended for use in any
Applications
■
Monitoring of the AC/DC “line-down” condition
“Closed-loop” interface between electromechanical
■
elements such as solenoids, relay contacts, small
motors, and microprocessors
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
SymbolParameterValueUnit
TOTAL DEVICE
T
STG
T
OPR
T
SOL
P
Total Device Power Dissipation @ T
D
EMITTER
LED Power Dissipation @ T
P
D
DETECTOR
I
OL
V
OH
V
CC
P
D
Storage Temperature-55 to +125°C
Operating Temperature-40 to +85°C
Lead Solder Temperature260 for 10 sec°C
= 25°C 115mW
A
Derate above 70°C4.0mW/°C
Steady State Isolation2500VRMS
RMS Current25mA
DC Current±30mA
= 25°C 45mW
A
Derate above 70°C2.0mW/°C
Low Level Output Current 20mA
High Level Output Voltage7.0V
Supply Voltage7.0V
Detector Power Dissipation @ T
The input of the MID400 consists of two back-to-back
LED diodes which will accept and convert alternating
currents into light energy. An integrated photo diodedetector amplifier forms the output network. Optical coupling between input and output provides 2500 VRMS
voltage isolation. A very high current transfer ratio
(defined as the ratio of the DC output current and the DC
input current) is achieved through the use of high gain
amplifier. The detector amplifier circuitry operates from a
5V DC supply and drives an open collector transistor
output. The switching times are intentionally designed to
be slow in order to enable the MID400, when used as an
AC line monitor, to respond only to changes in input voltage exceeding many milliseconds. The short period of
time during zero-crossing which occurs once every half
cycle of the power line is completely ignored. To operate
the MID400, always add a resistor, R
, in series with the
IN
input (as shown in test circuit 1) to limit the current to the
required value. The value of the resistor can be determined by the following equation:
VINVF–
R
=
-----------------------
IN
Where,
V
(RMS) is the input voltage.
IN
is the forward voltage drop across the LED.
V
F
IIN (RMS) is the desired input current required to sustain a logic
“O” on the output.
I
IN
Pin Description
Pin
Number
1, 3V
2, 4N/CNo Connect
8V
7AUXAuxiliary terminal.
6VOOutput terminal; open collector.
5GNDCircuit ground potential.
Pin
NameFunction
, V
IN1
Input terminals
IN2
Supply voltage, output circuit.
CC
Programmable capacitor input
to adjust AC voltage sensing
level and time delay.
Schematic Diagram
V
N/C
V
N/C
IN1
IN2
1
2
3
4
8
V
CC
7
AUX.
V
O
6
GND
5
Glossary
VOLTAGE S
V
RMS On-State RMS Input Voltage
I (ON)
The RMS voltage at an input terminal for a
specified input current with output conditions applied that according to the product
specification will cause the output switching element to be sustained in the on-state
within one full cycle.
V
RMS Off-State RMS Input Voltage
I (OFF)
The RMS voltage at an input terminal for a
specified input current with output conditions applied that according to the product
specification will cause the output switching element to be sustained in the off-state
within one full cycle.
V
OL
V
OH
V
F
CURRENTS
I
RMSOn-State RMS Input Current
I (ON)
I
I (OFF)
I
OH
*Current flowing out of a terminal is a negative value.
Low-Level Output Voltage
The voltage at an output terminal for a specific output current IOL, with input conditions applied that according to the product
specification will establish a low-level at
the output.
High-Level Output Voltage
The voltage at an output terminal for a specific output current IOH, with input conditions applied that according to the product
specification will establish a high-level at
the output.
LED Forward Voltage
The voltage developed across the LED
when input current IF is applied to the
anode of the LED.
The RMS current flowing into an input with
output conditions applied that according to
the product specification will cause the
output switching element to be sustained
in the on-state within one full cycle.
RMS Off-state RMS Input Current
The RMS current flowing into an input with
output conditions applied that according to
the product specification will cause the
output switching element to be sustained
in the off-state within one full cycle.
High-Level Output Current
The current flowing into * an output with
input conditions applied that according to
the product specification will establish a
high-level at the output.
The current flowing into * an output with
input conditions applied that according to
the product specification will establish a
low-level at the output.
I
CCL
Supply Current, Output LOW
The current flowing into * the V
supply
CC
terminal of a circuit when the output is at a
low-level voltage.
I
CCH
Supply Current, Output HIGH
The current flowing into * the V
supply
CC
terminal of a circuit when the output is at a
high-level voltage.
* Current flowing out of a terminal is a negative value.
DYNAMIC CHARACTERISTICS
t
ON
t
OFF
Turn-On Time
The time between the specified reference
points on the input and the output voltage
waveforms with the output changing from
the defined high-level to the defined lowlevel.
Turn-Off time
The time between the specified reference
points on the input and the output voltage
waveforms with the output changing from
the defined low-level to the defined highlevel.
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SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN,
WHICHCOVERS THESE PRODUCTS.
MID400 — AC Line Monitor Logic-Out Device
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PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification Product StatusDefinition
Advance InformationFormative / In Design
PreliminaryFirst Production
No Identification NeededFull Production
ObsoleteNot In Production
Datasheet contains the design specifications for product development. Specifications may change in
any manner without notice.
Datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild
Semiconductor reserves the right to make changes at any time without notice to improve design.
Datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes
at any time without notice to improve the design.
Datasheet contains specifications on a product that is discontinued by Fairchild Semiconductor.
The datasheet is for reference information only.