ADN2873

NOT RECOMMENDED FOR NEW DESIGNS

3.3 V, 50 Mbps to 4.25 Gbps, Single-Loop, Laser Diode Driver

Data Sheet (Rev. B) Product Selection Table

Part Models: 2
1ku List Price: price unavailable

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Overview

SFP/SFF and SFF-8472 MSA compliant
SFP reference design available
50 Mbps to 4.25 Gbps operation
Automatic average power control
Typical 60 ps output rise/fall time
VCSEL, DFB, and FP laser support
Bias current range: from 2 mA to 100 mA
Modulation current range: from 5 mA to 90 mA
Laser fail alarm and automatic laser shutdown (ALS)
Bias and modulation current monitoring
Voltage setpoint control
Resistor setpoint control
3.3 V supply
24-lead 4 mm × 4 mm LFCSP
Pin compatible with ADN2870

Like the ADN2870, the ADN2873 laser diode driver (LDD) is designed for advanced SFP and SFF modules, using SFF-8472 digital diagnostics. The ADN2873 supports NRZ data transmission operation from 50 Mbps up to 4.25 Gbps. With a new alarm scheme, this device avoids the shutdown issue caused by the system transient generated from various lasers.

The ADN2873 monitors the laser bias and modulation currents and it provides fail alarms and ALS. Using setup voltages of a microcontroller DAC or a trimmable resistor voltage divider, the ADN2873 can set up a laser optical average output power and extinction ratio. The optical average power control loop consists of an optical feedback from a photodiode, the comparator, and a status holder. The ADN2873 works easily with the Analog Devices, Inc., ADuC7019/ADuC7020/ADuC7023 family of MicroConverter^® devices and with the ADN2890/ADN2891/ADN2892 family of limiting amplifiers to make a complete SFP/SFF transceiver chipset solution.

The ADN2873 is pin compatible with the ADN2870 dual-loop LDD, allowing the same design to work with either device. For dual-loop control applications, refer to the ADN2870 data sheet. The product is available in a space-saving 24-lead, 4 mm × 4 mm LFCSP specified over the −40°C to +85°C temperature range.

Applications

1×/2×/4× Fibre Channel SFP/SFF modules
Multirate OC3 to OC48-FEC SFP/SFF modules
LX-4 modules
DWDM/CWDM laser transmitters
HDTV (SMPTE family) laser transmitters

Part Models: 2
1ku List Price: price unavailable

Documentation

Data Sheet 1

ADN2873: 3.3 V, 50 Mbps to 4.25 Gbps, Single-Loop, Laser Diode Driver Data Sheet (Rev.B) 08/06/2008

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADN2873ACPZ	24-Lead LFCSP (4mm x 4mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADN2873ACPZ-R7	24-Lead LFCSP (4mm x 4mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

May 5, 2014 - 14_0020 Conversion of 4x4mm body Size LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines.
		PCN14_0020_Form Material_Report Detailed Change Description Package Outline Drawing Qualification Report Summary
ADN2873ACPZ
ADN2873ACPZ-R7
May 22, 2012 - 12_0063 Conversion of Select Sizes of LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to ASE-Korea.
		PCN12_0063_Form Material_Report Detailed Change Description Detailed Parts List Package Outline Drawing Qualification Report Summary
ADN2873ACPZ
ADN2873ACPZ-R7