ACPL-074L-500E Avago Technologies US Inc., ACPL-074L-500E Datasheet - Page 11

• Manufacturer Part Number: ACPL-074L-500E
• Description: Amplifier-Output Optocoupler,2-CHANNEL,3.75kV ISOLATION,SO
• Manufacturer: Avago Technologies US Inc.

Specifications of ACPL-074L-500E

• Voltage - Isolation: 3750Vrms
• Number Of Channels: 2, Unidirectional
• Current - Output / Channel: 10mA
• Data Rate: 15MBd
• Propagation Delay High - Low @ If: 29ns @ 14mA
• Current - Dc Forward (if): 20mA
• Input Type: DC
• Output Type: Push-Pull, Totem-Pole
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The t
guaranteed specifications for propagation delays, pulse-
width distortion and propagation delay skew over the rec-
ommended temperature, and power supply ranges.
Powering Sequence
V
powering up the output connecting component.
Input Limiting Resistors
ACPL-071L and ACPL-074L are direct current driven (Fig-
ure 8), and thus eliminate the need for input power sup-
ply. To limit the amount of current flowing through the
LED, it is recommended that a 210ohm resistor is connect-
ed in series with anode of LED (i.e. Pin 2 for ACPL-071L and
Pin 1 and 4 for ACPL-074L) at 5V input signal. At 3.3V input
signal, it is recommended to connect 80ohm resistor in se-
ries with anode of LED.
The recommended limiting resistors are based on the
assumption that the driver output impedence is 50Ω (as
shown in Figure 11).
Figure 12. Improvement of t
11
(i) V
DD
DD
needs to achieve a minimum level of 3.0V before
=3.3V, C
PSK
35.00
30.00
25.00
20.00
15.00
10.00
5.00
0.00
specified optocouplers offer the advantages of
-40
peak
=100pF, R
t
PHL
-20
|PWD|
t
PLH
p
limit
and PWD with added 100pF peaking capacitor in parallel of input limiting resistor.
0
T
=80Ω
A
t
PHL
- TEMPERATURE -
20
t
PLH
40
Without peaking cap
With peaking cap
60
o
C
80
100
Speed Improvement
A peaking capacitor can be placed across the input cur-
rent limit resistor (Figure 11) to achieve enhanced speed
performance. The value of the peaking cap is dependent
to the rise and fall time of the input signal and supply volt-
ages and LED input driving current (I
significant improvement of propagation delay and pulse
with distortion with added peak capacitor at driving cur-
rent of 14mA and 3.3V or 5V power supply.
Figure 11 Connection of peaking capacitor (Cpeak) in parallel of the input
limiting resistor (Rllimit) to improve speed performance
(ii) V
V
in
GND
+
-
DD
1
=5V, C
R
30.00
25.00
20.00
15.00
10.00
drv
5.00
0.00
=50Ω
peak
-40
=100pF, R
R
C
-20
peak
limit
t
PHL
limit
0
=210Ω
SHIELD
T
t
PLH
A
- TEMPERATURE -
20
|PWD|
40
Without peaking cap
t
PHL
f
With peaking cap
0.1μF
). Figure 12 shows
o
60
C
t
PLH
GND
80
V
V
DD2
O
2
100