FTRJ1721SGCL FINISAR [Finisar Corporation.], FTRJ1721SGCL Datasheet - Page 6

• Manufacturer Part Number: FTRJ1721SGCL
• Description: OC-48 LR-1/STM L-16.1 Multirate 2x10 SFF Transceiver
• Manufacturer: FINISAR [Finisar Corporation.]

FTRJ1721S1xCL 2x10 Pin SFF Product Specification – December 2003
VIII. Analog Diagnostics Functions
Transmitter
Monitor photodiode current monitor
Laser bias current monitor
Receiver
Received photocurrent
Photodiode responsivity
Applied voltage at PD pin
Notes:
 Finisar Corporation December 16, 2003 RevD
1.
2.
3.
Pins 19 and 20 provide an analog voltage output proportional to the monitor photodiode current,
per the following formula: I
equivalent circuit.
Pins 17 and 18 provide an analog voltage output proportional to the laser bias current, per the
following formula: I
circuit.
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.
Bmon+
Bmon-
Parameter
Laser
3 KΩ
3 KΩ
Vcc
10 Ω
BIAS
Ibias
Analog monitoring function connections.
= .V(Bmon+ - Bmon-) / 10Ω. The figure below shows the equivalent
BIAS
Symbol
Bmon+,
Pmon+,
Bmon-
Pmon-
Vpd
Rpd
= .V(Pmon+ - Pmon-) / 200Ω. The figure below shows the
R
Imon
200 Ω
(T
op
Vcc
= -10 to 70 ° ° ° ° C, V
Min
0.5
2.4
3 KΩ
3 KΩ
Photodidoe
0
0
0
Monitor
Pmon+
Pmon-
Typ
0.9
CC
= 3.00 to 3.60 Volts)
Ipd
Max
Vcc
Vcc
Vcc
1.0
Vpd
1
Photodidoe
Receiver
F i n i s a r
Unit
A/W
mA
V
V
V
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