MAX3669(1999) View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX3669
(Rev.:1999)

+3.3V, 622Mbps SDH/SONET Laser Driver with Current Monitors and APC

Maxim Integrated 

+3.3V, 622Mbps SDH/SONET

Laser Driver with Current Monitors and APC

AC ELECTRICAL CHARACTERISTICS

(VCC = +3.14V to +5.5V, load as shown in Figure 2, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.3V,

TA = +25°C.) (Note 6)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Modulation Current Range

Modulation Off-Current

Modulation Current Stability

Modulation Current Absolute

Accuracy

IMOD

(Note 7)

ENABLE = low (Note 3)

IMOD = 75mA

IMOD = 5mA (Note 5)

5

-620

-15

-165

205

75

mA

200

µA

620

ppm/°C

15

%

Output Rise/Fall Time

Jitter Generation (peak-to-peak)

Pulse-Width Distortion

(peak-to-peak)

Enable/Start-Up Delay

tR, tF

20% to 80%,

RL = 10Ω | | 20Ω load

(Note 8)

(Notes 9, 10)

Open loop

IMOD = 5mA

IMOD = 75mA

IMOD = 5mA

IMOD = 75mA

100

200

ps

230

375

100

ps

70

155

ps

10

135

250

ns

Maximum Consecutive Identical

Digits at 622Mbps

CID

80

Bits

Note 1: Dice are tested and guaranteed at TA = +25°C only.

Note 2: Tested with RMODSET = 5.11kΩ (IMOD ≈ 38mA), RBIASMAX = 4.56kΩ (IBIAS ≈ 52mA), excluding IBIAS and IMOD.

Note 3: Both the bias and modulation currents will be disabled if any of the current set pins are shorted to ground.

Note 4: Guaranteed by design and characterization. This assumes that the laser to monitor diode transfer function does not change

with temperature.

Note 5: See Typical Operating Characteristics for worst-case distributions.

Note 6: AC characteristics are guaranteed by design and characterization.

Note 7: Total IMOD out of OUT+. See the Design Procedure for information regarding current delivered to the laser.

Note 8: Input signal is a 622Mbps, 213- 1 PRBS with 80 inserted zeros.

Note 9: Input signal is a 622Mbps, 11110000 pattern.

Note 10:PWD = (wider pulse – narrower pulse) / 2.

VCC

DATA+

DATA-

(DATA+) - (DATA-)

IOUT+

100mV MIN

800mV MAX

200mVp-p

MIN

1600mVp-p

MAX

IMOD

20Ω

OUT-

MAX3669

OUT+

BIAS

20Ω

IOUT+

15Ω

1µF

10Ω

1µF

OSCILLOSCOPE

12.4Ω

50Ω

Figure 1. Required Input Signal and Output Polarity

VCC

Figure 2. Output Termination for Characterization

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