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ADN2841
(Rev.:2002)

Dual-Loop 50 Mbps–2.7 Gbps Laser Diode Driver

Analog Devices 

ADN2841–SPECIFICATIONS (VCC = 5 V ؎10%. All specifications TMIN to TMAX, unless otherwise noted1. Typical

values as specified at 25؇C.)

Parameter

Min Typ Max

Unit

LASER BIAS (BIAS)

Output Current IBIAS

Compliance Voltage

IBIAS during ALS

ALS Response Time

CCBIAS Compliance Voltage

2

100

mA

1.2

VCC

V

0.1

mA

10

µs

1.2

V

MODULATION CURRENT (IMODP, IMODN)

Output Current IMOD

Compliance Voltage

IMOD during ALS

Rise Time

5

80

1.8

VCC

0.1

80

120

Fall Time

80

120

Jitter

20

Pulsewidth Distortion

18

mA

V

mA

ps

ps

ps p-p

ps

MONITOR PD (MPD, MPD2)

Current

Input Voltage

50

1200

µA

1.6

V

POWER SET INPUT (PSET)

Capacitance

Input Current

Voltage

80

pF

50

1200

µA

1.15 1.23 1.35

V

EXTINCTION RATIO SET INPUT (ERSET)

Allowable Resistance Range

Voltage

1.2

25

kΩ

1.15 1.23 1.35

V

ALARM SET (ASET)

Allowable Resistance Range

Voltage

Hysteresis

1.2

25

kΩ

1.15 1.23 1.35

V

5

%

CONTROL LOOP

Time Constant

0.22

sec

2.25

sec

DATA INPUTS (DATAP, DATAN, CLKP, CLKN)

AC-Coupled2

V p-p (Single-Ended Peak-to-Peak)

100

500

mV

Input Impedance

tSETUP3

tHOLD3

50

Ω

150 95

ps

0

–70

ps

LOGIC INPUTS (ALS, LBWSET, CLKSEL)

VIH

2.4

VIL

ALARM OUTPUTS (Internal 30 kΩ Pull-Up)

VOH

2.4

VOL

V

0.8

V

V

0.8

V

IDTONE

Compliance Voltage

VCC – 1.5 V





IOUT

I IN



 RATIO

fIN4

2

0.01

1

MHz

Conditions/Comments

Average Current

Average Current

(LBWSET = GND)

(LBWSET = VCC)

User to Supply Current

Sink in the Range 50 µA

to 4 mA

–2–

REV. A

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