ADN2847 3.3 V Dual-Loop 50 Mbps to 3.3 Gbps Laser Diode Driver

The ADN2847 uses a unique control algorithm to control both average power and extinction ratio of the laser diode (LD) after initial factory setup. External component count and PCB area are low, as both power and extinction ratio control are fully integrated. Programmable alarms are provided for laser fail (end of life) and laser degrade (impending fail).

Optional dual MPD current monitoring is designed into the ADN2847 specifically for DWDM wavelength control.

The ADN2847 is specified for the −40°C to +85°C temperature range and is available in a 48-lead LFCSP package and a 32-lead LFCSP package.

Applications

SONET OC-1/3/12/48
SDH STM-0/1/4/16
Fibre Channel
Gigabit Ethernet
DWDM dual MPD wavelength control

Features and Benefits

50 Mbps to 3.3 Gbps operation
Single 3.3 V operation
Typical rise/fall time: 80 ps
Bias current range: 2 mA to 100 mA
Modulation current range: 5 mA to 80 mA
Monitor photodiode current: 50 µA to 1200 µA

Dual MPD functionality for DWDM
50 mA supply current at 3.3 V
Closed-loop control of power and extinction ratio
Full current parameter monitoring
Laser fail and laser degrade alarms
Automatic laser shutdown (ALS)

Optical

Laser Drivers

Data Sheets

Document	note
ADN2847: 3V Dual Loop 50 Mbps to 3.3 Gbps Laser Diode Driver Data Sheet (Rev. B)	PDF 615 kB

Application Notes

Document	note
AN-654: Optical Module Development Platform 2.5 Gbps Transmitter with Digital Diagnostics (Rev. 0)	PDF 387 kB
AN-638: ADN2847 AC-Coupled Optical Evaluation Kit (Rev. 0)	PDF 451 kB
AN-631: ADN2841/ADN2847 DC-Coupled Optical Evaluation Kit (Rev. 0)	PDF 596 kB
AN-658: Optical Channel Identification on the ADN284x Laser Drivers (Part I)	PDF 234 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADN2847ACPZ-32 Production	32 ld LFCSP (5x5mm)	OTH 490	-40 to 85C	11.28	8.05	Y
ADN2847ACPZ-32-RL Obsolete	32 ld LFCSP (5x5mm)	REEL 5000		0	0	Y
ADN2847ACPZ-32-RL7 Production	32 ld LFCSP (5x5mm)	REEL 1500	-40 to 85C	0	8.05	Y
ADN2847ACPZ-48 Production	48 ld LFCSP 7x7mm (5.1EP)	OTH 260	-40 to 85C	0	0	Y