ADN2841 Analog Devices, Inc., ADN2841 Datasheet - Page 10

• Manufacturer Part Number: ADN2841
• Description: Dual-loop 50 Mbps.2.7 Gbps Laser Diode Driver
• Manufacturer: Analog Devices, Inc.

ADN2841
Figure 9. Unfiltered 2.5 Gbps Optical Eye. Average
Power = –3 dBm, Extinction Ratio = 9.5 dB. Eye
Obtained Using a Mitsubishi FU-445-SDF.
GND4
VCC4
V
CC
EA MODULATOR
12
V
1
V
48
CC
CC
GND
LBWSET
ASET
ERSET
PSET
GND
IMPD
IMPDMON
IMPDMON2
IMPD2
100nH
V
CC
Figure 8. Applications Circuit
ADN2841
10nF
75
V
1/2 OP293
1/2 OP293
CC
1
7
V
CC
–10–
DEGRADE
V
–V
33
V
CC
CC
CLKSEL
CC
IDTONE
8
IMMON
IBMON
V
GND2
GND3
VCC3
CC
GND
FAIL
ALS
2
3
6
5
24
36
Figure 10. Filtered 2.5 Gbps Optical Eye. Average
Power = –3 dBm, Extinction Ratio = 9 dB. Eye
Obtained Using a Mitsubishi FU-445-SDF.
GND2
V
NOTES
1. V
2. THE OP293 HAS BEEN SELECTED BECAUSE
CC
AS CLOSE AS POSSIBLE TO THE ACTUAL
SUPPLY PINS ON THE ADN2841 AND THE
LASER DIODE USED.
OF ITS GAIN-BANDWIDTH PRODUCT AND
SHOULD BE USED IN THIS APPLICATION.
V
V
CC
CC
CC
s SHOULD HAVE BYPASS CAPACITORS
DAC
DAC
1k
1k
REV. A