Finisar FTRJ1621S1MCL Manual Do Utilizador
FTRJ1621S1xCL 2x10 Pin SFF Product Specification – December 2003
F i n i s a r
Finisar Corporation December 16, 2003 RevE
Page 6
VIII. Analog Diagnostics Functions
(T
op
= -10 to 70
°°°°C, V
CC
= 3.00 to 3.60 Volts)
Parameter Symbol
Min
Typ
Max
Unit
Ref.
Transmitter
Monitor photodiode current monitor
Pmon+,
Pmon-
0 Vcc
V
1
Laser bias current monitor
Bmon+,
Bmon-
0 Vcc
V
2
Receiver
Received photocurrent
Rpd
0 1
mA
3
Photodiode responsivity
R
0.5
0.9
1.0
A/W
Applied voltage at PD pin
Vpd
2.4 Vcc V
3
Notes:
1. Pins 19 and 20 provide an analog voltage output proportional to the monitor photodiode current,
per the following formula: I
BIAS
= .V(Pmon+ - Pmon-) / 200
Ω. The figure below shows the
equivalent circuit.
2. Pins 17 and 18 provide an analog voltage output proportional to the laser bias current, per the
following formula: I
BIAS
= .V(Bmon+ - Bmon-) / 10
Ω. The figure below shows the equivalent
circuit.
3. Pin 1 is used to monitor the received photocurrent. It must be connected to a positive voltage
within the range specified above. The current that flows into this pin is the received photocurrent.
The received power is given by the photocurrent multiplied by the photodiode responsivity.
The received power is given by the photocurrent multiplied by the photodiode responsivity.
Vcc
10
Ω
3 K
Ω
3 K
Ω
Bmon+
Bmon-
Ibias
Vcc
200
Ω
3 K
Ω
3 K
Ω
Pmon+
Pmon-
Imon
Laser
Monitor
Photodidoe
Vpd
Receiver
Photodidoe
Ipd
Analog monitoring function connections.