+3.3V, 2.5Gbps SDH/SONET Laser Driver

with Automatic Power Control

2

_______________________________________________________________________________________

90

ENABLE = low (Note 4)

(Note 3)

900

(Note 2)

(Note 5)

Sourcing 50µA

(Note 6)

APC open loop

Figure 1

PECL compatible

Sinking 100µA

CONDITIONS

%

-15

15

Monitor-Diode Bias Absolute

Accuracy

ppm/°C

-480

50

480

Monitor-Diode Bias Setpoint

Stability

µA

18

1000

Monitor-Diode DC Current

Range

V

1.5

Monitor-Diode Reverse Bias

Voltage

V

0.1

0.44

µA

100

Bias Off Current

mA

1

100

mA

62

105

Supply Current

Bias Current Range

V

2.4

TTL Output High Voltage FAIL

V

0.8

TTL Input Low Voltage

(ENABLE, LATCH)

V

2.0

TTL Input High Voltage

(ENABLE, LATCH)

µA

-1

10

Clock and Data Input Current

ppm/°C

230

Bias-Current Stability

%

-15

15

(Note 5)

Bias-Current Absolute Accuracy

mVp-p

200

1600

Differential Input Voltage

V

1.49

1.32

Common-Mode Input Voltage

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

DC ELECTRICAL CHARACTERISTICS

unless otherwise noted.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Note 4: Both the bias and modulation currents will be switched off if any of the current set pins are grounded.

Note 5: Accuracy refers to part-to-part variation.

Note 6: Assuming that the laser to monitor-diode transfer function does not change with temperature.

Current into BIAS ...........................................-20mA to +150mA

Current into OUT+, OUT- ................................-20mA to +100mA

Current into MD.....................................................-5mA to +5mA

Voltage at DATA+, DATA-, CLK+, CLK-,

Voltage at APCFILT, CAPC, MODSET,

BIASMAX, APCSET ...........................................-0.5V to +3.0V

Current into FAIL ...............................................-10mA to +30mA

TQFP (derate 20.8mW/°C above +85°C) ...................1354mW

Storage Temperature Range .............................-65°C to +165°C

Operating Junction Temperature Range ...........-55°C to +150°C

Processing Temperature (die) .........................................+400°C

Lead Temperature (soldering, 10sec) .............................+300°C

ABSOLUTE MAXIMUM RATINGS