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PDF ADN2843 Data sheet ( Hoja de datos )
| Número de pieza | ADN2843 | |
| Descripción | 10.709 Gbps Laser Diode Driver Chipset | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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FEATURES
Data Rates from 9.952 Gbps to 10.709 Gbps
Typical Rise/Fall Time 25 ps/23 ps
Bias Current Range 3 mA to 80 mA
Modulation Current Range 5 mA to 80 mA
Monitor Photodiode Current 50 A to 1200 A
Closed-Loop Control of Both Average Optical Power
and Extinction Ratio
Laser Fail and Laser Degrade Alarms
Automatic Laser Shutdown, ALS
Dual MPD Functionality for Wavelength Control
CML Data Inputs
50 ⍀ Internal Data Terminations
3.3 V Single-Supply Operation
Driver Supplied in Dice Format
APPLICATIONS
SONET OC-192, SDH STM-64
Supports 10.667 Gbps and 10.709 Gbps FEC Rates
10 Gb Ethernet IEEE802.3ae
10.709 Gbps Laser Diode
Driver Chipset
ADN2843
GENERAL DESCRIPTION
The ADN2943 chipset consists of two components, the ADN2845
and the ADN2844. The ADN2845 is a 10.709 Gbps laser diode
driver. The ADN2845 eliminates the need to ac couple since it
can deliver 80 mA of modulation while dc coupled to the laser
diode. It is intended to be copackaged with the laser to minimize
bond lengths, which improves performance of the optical
transmitter. For transmission line applications, contact HSN
Application Group at [email protected].
The ADN2844 offers a unique control loop algorithm and pro-
vides dual loop control of both average power and extinction ratio.
Programmable alarms are provided for laser fail (end of life) and
laser degrade (impending fail).
Both the ADN2844 and the ADN2845 are available as bare die.
The ADN2844 is also available in 5 mm ¥ 5 mm 32-lead LFCSP.
FUNCTIONAL BLOCK DIAGRAM
MPD
VCC
VCC
ADN2844
ADN2843
VCC
VCC
ADN2845
VCC
LD
IMPD
IMPD2
GND
MODE
CONTROL
ALS
IMOD_CTRL
PSET
D_IMOD
*
GND
ERSET
IBIAS_CTRL
*
GND
ERCAP
PAVCAP
ASET
GND IDTONE
*ADN2850 OR ADN2860 OPTICAL SUPERVISOR
GND
IMODN
ALS
IMODP
DATAP
GND
DATAN
IBIAS
GND
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.
1 page  
ADN2843
ADN2844 PIN FUNCTION DESCRIPTIONS
Pin No. Mnemonic Function
1 ASET
2 ERSET
3 PSET
4 GND
5 IMPD
6 IMPDMON
7 IMPDMON2
8 IMPD2
9 GND
10 VCC
11 ERCAP
12 PAVCAP
13 MODE
14, 15, 17 GND
18, 31, 32 GND
16 GND
19 DEGRADE
20 FAIL
21 ALS
22 IMMON
23 IBMON
24 IDTONE
25 GND
26 VCC
27 IBIAS_CTRL
28 GND
29 IMOD_CTRL
30 D_IMOD
Alarm Current Threshold Set (Should be Terminated with a 1.2 k⍀ Resistor when Not Used)
Extinction Ratio Current Set
Average Optical Power Set
Negative Supply
Monitor Photodiode Current Input (Tie to GND when Not in Use)
Mirrored Current from IMPD (Tie to VCC when Not in Use)
Mirrored Current from IMPD2 (For Optional Use with Two MPDs, Tie to VCC when Not in Use)
Optional Second MPD Current Input (Tie to GND when Not in Use)
Negative Supply
Positive Supply
Extinction Ratio Loop Capacitor
Average Power Loop Capacitor
Control Loop Operating Mode Logic Input (Should Not Be Left Floating)
Negative Supply
Negative Supply
Negative Supply
DEGRADE Alarm Output, Open Collector, Active High
FAIL Alarm Output, Open Collector, Active High
Automatic Laser Shutdown Logic Input (Should Not Be Left Floating)
Modulation Current Mirror Output, Current Source from VCC
Bias Current Mirror Output, Current Source from VCC
ID Tone Input Current (Tie to VCC when Not in Use)
Negative Supply
Positive Supply
Control Output Current Sink
Negative Supply
Control Output Current Sink
Control Output Current Sink
Pin No.
1
2
3, 13
4
5
6
7
8
9
10
11
12
14
15
16–18
ADN2845 PIN FUNCTION DESCRIPTIONS
Mnemonic Function
DATAN
GND
NC
GND
DATAP
ALS
IMOD_CTRL
IBIAS_CTRL
GND
NC
IBIAS
IMODP
VCC
GND
VCC
AC-Coupled CML Data, Negative Differential Terminal
Negative Supply
No Connect, Leave Floating
Negative Supply
AC-Coupled CML Data, Positive Differential Terminal
Automatic Laser Shutdown Logic Input
Modulation Current Control Input (Control Circuit Sinks IMOD/10 from Pin to GND)
BIAS Current Control Input (Control Circuit Sinks IBIAS/10 from Pin to GND)
Negative Supply
No Connect, Leave Floating
BIAS Current
Modulation Current
VCC Connection for IMODN Termination Resistor
Negative Supply
Positive Supply
REV. 0
–5–
5 Page 
ADN2843
Pad Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
ADN2844
DIE PAD COORDINATES
(With Origin in the Center of the Die)
ADN2845
Pad Name
X (m)
Y (m)
Pad Number Pad Name
X (m)
ASET
ERSET
PSET
GND
IMPD
IMPDMON
IMPDMON2
IMPD2
GND
VCC
ERCAP
PAVCAP
MODE
GND
GND
GND
GND
GND
DEGRADE
FAIL
ALS
IMMON
IBMON
IDTONE
GND
VCC
IBIAS_CNTRL
GND
IMOD_CTRL
D_IMOD
GND
GND
1014.00
769.00
486.00
186.00
–132.00
–479.00
–811.00
–1056.00
–1339.00
–1339.00
–1339.00
–1339.00
–1339.00
–1339.00
–1339.00
–1339.00
–1051.00
–761.00
–476.00
–207.00
102.00
387.00
653.00
904.00
1359.00
1359.00
1359.00
1359.00
1359.00
1359.00
1359.00
1359.00
–1019.00
–1019.00
–1019.00
–1019.00
–1019.00
–1019.00
–1019.00
–1019.00
–877.00
–672.00
–429.00
–204.00
91.00
335.00
580.00
824.00
1019.00
1019.00
1019.00
1019.00
1019.00
1019.00
1019.00
1019.00
995.00
781.00
523.00
317.00
–29.00
–294.00
–562.00
–807.00
1 DATAN
2 GND*
3 NC
4 GND*
5 DATAP
6 ALS
7 IMOD_CTRL
8 IBIAS_CTRL
9 GND*
10 NC*
11 IBIAS
12 IMODP*
13 NC*
14 VCC (IMODN)*
15 GND*
16 VCC*
17 VCC*
18 VCC*
*Denotes double bond pad.
–500.00
–500.00
–500.00
–500.00
–500.00
–300.00
–100.00
100.00
300.00
500.00
500.00
500.00
500.00
500.00
300.00
100.00
–100.00
–300.00
Y (m)
400.00
222.00
0.00
–222.00
–400.00
–600.00
–600.00
–600.00
–600.00
–400.00
–200.00
–30.00
178.00
378.00
600.00
600.00
600.00
600.00
REV. 0
–11–
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ADN2843.PDF ] | |
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