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ADN2830ACPZ32

P1-P3P4-P6P7-P9P10-P11
a
ADN2830
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Tel: 781/329-4700 www.analog.com
Fax: © Analog Devices, Inc. All rights reserved.
REV.REV.
Continuous Wave Laser
FUNCTIONAL BLOCK DIAGRAM
GND
GND
PAVCAP
V
CC
MPD
IBMON IMPDMON ALS FAIL DEGRADE
V
CC
GND
CONTROL
GND
IMPD
R
PSET
IBIAS
GND
R
ASET
MODE
V
CC
LD
PSET
ASET
FEATURES
Bias Current Range 4 mA to 200 mA
Monitor Photodiode Current 50 A to 1200 A
Closed-Loop Control of Average Power
Laser FAIL and Laser DEGRADE Alarms
Automatic Laser Shutdown, ALS
Full Current Parameter Monitoring
5 V Operation
–40C to +85C Temperature Range
5 mm 5 mm 32-Lead LFCSP Package
APPLICATIONS
Fiber Optic Communication
GENERAL DESCRIPTION
The ADN2830 provides closed-loop control of the average
optical power of a continuous wave (CW) laser diode (LD)
after initial factory setup. The control loop adjusts the laser
IBIAS to maintain a constant back facet monitor photodiode
(MPD) current and thus a constant laser optical power. The
external PSET resistor is adjusted during factory setup to set
the desired optical power. R
PSET
is set at 1.23/I
AV
, where I
AV
is the MPD current corresponding to the desired optical power.
Programmable alarms are provided for laser fail (end of life)
and laser degrade (impending fail).
To provide monitoring of the MPD current, the MPD can be
connected to the IMPD pin. In this case, the MPD current is
mirrored to the IMPDMON pin to provide a monitor and
internally to the PSET pin to close the control loop.
By closing the feedback using IBMON rather than an MPD
connected to PSET, the device is configured to control a constant
current in the laser rather than a constant optical output power.
Average Power Controller
B
781/461-3113
2012
ADN2830* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
View a parametric search of comparable parts.
EVALUATION KITS
• ADN2830 Evaluation Board
DOCUMENTATION
Application Notes
• AN-634: Using the ADN2830 Evaluation Board
Data Sheet
• ADN2830: Continuous Wave Laser Average Power
Controller Data Sheet
REFERENCE MATERIALS
Informational
• Optical and High Speed Networking ICs
DESIGN RESOURCES
• ADN2830 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
DISCUSSIONS
View all ADN2830 EngineerZone Discussions.
SAMPLE AND BUY
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TECHNICAL SUPPORT
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number.
DOCUMENT FEEDBACK
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REV.
–2–
ADN2830–SPECIFICATIONS
Parameter Min Typ Max Unit Conditions/Comments
LASER BIAS (BIAS)
Output Current IBIAS 4 200 mA
Compliance Voltage 1.2
V
CC
V
IBIAS during ALS 40 μA
ALS Response Time 10 μs
MONITOR PD (IMPD)
Current 50 1200 μA
Input Voltage 1.6 V
POWER SET INPUT (PSET)
Capacitance 80 pF
Input Current 50 1200 μA
Voltage 1.15 1.23 1.35 V
ALARM SET (ASET)
Allowable Resistance Range 1.2 13 kΩ
Voltage 1.15 1.23 1.35 V
Hysteresis 5 %
LOGIC INPUTS (ALS, MODE)
V
IH
2.4 V
V
IL
0.8 V
ALARM OUTPUTS (Internal 30 kΩ Pull-Up)
V
OH
2.4 V
V
OL
0.4 V
IBMON IMPDMON
IBMON, Division Ratio 100 A/A
IMPDMON Division Ratio 1 A/A
Compliance Voltage 0 V
CC
– 1.2 V
SUPPLY
I
CC
2
25 mA IBIAS = 0
V
CC
4.5 5.0 5.5 V
NOTES
1
Temperature range: –40°C to +85°C.
2
I
CC
for power calculation is the typical I
CC
given.
Specifications subject to change without notice.
(V
CC
= 5 V 10%. All specifications T
MIN
to T
MAX
, unless otherwise noted
1
.
Typical values as specified at 25C.)
B
P1-P3P4-P6P7-P9P10-P11

ADN2830ACPZ32

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Buy ADN2830ACPZ32
Manufacturer:
Analog Devices Inc.
Description:
Laser Drivers Average Pwr Cntlr for Continuous Wave
Lifecycle:
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