ADN2526 11.3 Gbps Active Back-Termination Differential Laser Diode Driver

The ADN2526 laser diode driver is designed for direct modula-tion of packaged laser diodes that have a differential resistance ranging from 5 Ω to 50 Ω. The active back-termination in the ADN2526 absorbs signal reflections from the TOSA end of the output transmission lines, enabling excellent optical eye quality to be achieved even when the TOSA end of the output transmission lines is significantly misterminated. ADN2526 is an SFP+ MSA-compliant device, and its small package and enhanced ESD protection provide the optimum solution for compact modules where laser diodes are packaged in low pin-count optical subassemblies.

The modulation and bias currents are programmable via the MSET and BSET control pins. By driving these pins with control voltages, the user has the flexibility to implement various average optical power and extinction ratio control schemes, including closed-loop or look-up table control. The automatic laser shutdown (ALS) feature allows the user to turn on/off the bias and modulation currents by driving the ALS pin with a LVTTL logic source.

The product is available in a space-saving 3 mm × 3 mm LFCSP specified from −40°C to +85°C.

Applications

SONET OC-192 and SDH STM-64 optical transceivers
10 Gb Fibre Channel transceivers
10 Gb Ethernet optical transceivers
SFP+/XFP/X2/XENPAK/XPAK/MSA 300 optical modules

Features and Benefits

3.3 V operation

Up to 11.3 Gbps operation

Typical 24 ps rise/fall times

Full back-termination of output transmission lines

Drives TOSAs with resistances ranging from 5 Ω to 50 Ω

Bias current range: 10 mA to 100 mA

Differential modulation current range: 10 mA to 80 mA

Voltage input control for bias and modulation currents

Data inputs sensitivity: 150 mV p-p diff

Automatic laser shutdown (ALS)

Cross point adjustment (CPA)

See data sheet for additional Features

Optical

Laser Drivers

Data Sheets

Document	note
ADN2526: 11.3 Gbps Active Back-Termination, Differential Laser Diode Driver Data Sheet (Rev. B)	PDF 431 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADN2526ACPZ Production	16 ld LFCSP (3x3mm, 1.50mm exposed pad)	OTH 714	-40 to 85C	25.37	21.14	Y
ADN2526ACPZ-R2 Production	16 ld LFCSP (3x3mm, 1.50mm exposed pad)	REEL 250	-40 to 85C	25.37	25.37	Y
ADN2526ACPZ-R7 Production	16 ld LFCSP (3x3mm, 1.50mm exposed pad)	REEL 1500	-40 to 85C	0	21.14	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-ADN2526-NTZ	Evaluation Board	-1	Y

ADN2526: 11.3 Gbps Active Back-Termination, Differential Laser Diode Driver Data Sheet (Rev. B) adn2526