Maxim MAX3667E-D, MAX3667ECJ Datasheet

________________General Description

The MAX3667 is a complete, +3.3V laser driver with
automatic power control (APC), designed for SDH/
SONET applications up to 622Mbps. It accepts differ­ential PECL inputs, provides single-ended bias and
modulation currents, and operates over a -40°C to
+85°C temperature range.

A temperature-stabilized reference voltage simplifies
laser current programming. It allows external program­ming of the modulation current between 5mAp-p and
60mAp-p, and of the bias current between 5mA and
90mA.

The APC function, which incorporates a monitor photo­diode, an external resistor, and two external capacitors,
maintains constant laser output power. Two current
monitors provide high-speed signals that are directly
proportional to the bias and modulation currents.
Additional features include disable/enable control and
a slow-start feature with a minimum turn-on time of
50ns. The MAX3667 is available in die form and in a
32-pin TQFP package.

________________________Applications

622Mbps SDH/SONET Access Nodes
Laser Driver Transmitters
Section Repeaters

____________________________Features

♦ Single +3.3V or +5.0V Operation
♦ Automatic Average Power Control
♦ Bias Current and Modulation Current Monitor

Outputs

♦ TTL-Compatible Disable Input
♦ Temperature-Compensated Reference
♦ PECL-Compatible Data Inputs

MAX3667

+3.3V, 622Mbps SDH/SONET Laser Driver

with Automatic Power Control

________________________________________________________________

Maxim Integrated Products

1

MAX3667

MAX3691

130Ω 130Ω

50Ω

82Ω 82Ω

PECL

1µF

DISABLE

COMP

C

COMP

BIASMON MODMON APCSET

MD

MONITOR

DIODE

+3.3V

LASER
DIODE

IMOD

R

FILT

22Ω

R

DAMP

4.7Ω

100Ω

470nH

4:1

SERIALIZER

WITH

CLOCK GEN

1µF

0.01µF

0.1µF

0.1µF

IBIAS

MODSETGND

IN+
IN-

BIASSET APC

C

APC

1nF

V

CC

+3.3V

____________________________________________________Typical Operating Circuit

19-1311; Rev 1; 3/98

PART

MAX3667ECJ
MAX3667E/D -40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

32 TQFP
Dice*

EVALUATION KIT

AVAILABLE

_______________Ordering Information

Pin Configuration appears at end of data sheet.

*

Dice are designed to operate from -40°C to +85°C but are

tested and guaranteed only at T

j

= +25°C.

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone] ext. 3468.

MAX3667

+3.3V, 622Mbps SDH/SONET Laser Driver
with Automatic Power Control

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +3.3V ±5%, TA= -40°C to +85°C, unless otherwise noted.) (Notes 1, 2)

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.

Supply Voltage, VCC..............................................-0.5V to +7.0V

Current into IBIAS..............................................-50mA to 350mA

Current into IMOD .............................................-50mA to 200mA

Current into MD ..................................................................±7mA

Voltage at APC, MODMON,

BIASMON, COMP....................................-0.5V to (V

CC

+ 0.5V)

Voltage at IN+, IN-, DISABLE, MODSET,

BISASSET, APCSET, PULLUP..................-0.5V to (V

CC

+ 0.5V)

Continuous Power Dissipation (TA= +85°C)

TQFP (derate 11.1mW/°C above +85°C)......................721mW

Operating Temperature Range ...........................-40°C to +85°C

Operating Junction Temperature Range (die) ..-55°C to +175°C

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

Storage Temperature Range.............................-65°C to +160°C

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

VIN= 1.82V

VIN= 2.14V

Disable = high

(Note 5)

R

APCSET

= 33.2kΩ

Closed loop (Note 4)

R

APCSET

= 2kΩ

R

MODSET

= 33.2kΩ (Note 10)

R

MODSET

= 2kΩ (Note 10)

R

MODSET

= 33.2kΩ, open loop (Note 8)

R

MODSET

= 2kΩ, open loop (Note 8)

R

BIASSET

= 33.2kΩ

R

BIASSET

= 2kΩ

R

BIASSET

= 2kΩ, closed loop (Notes 4, 9)

R

BIASSET

= 33.2kΩ, open loop (Note 8)

Disable = high

Disable = high or low

R

MODSET

= 2kΩ (Note 10)

R

BIASSET

= 2kΩ, open loop (Note 8)

R

BIASSET

= 2kΩ

CONDITIONS

V2.0V

DIH

TTL Disable High Voltage

µA2 10I

IH

PECL Input Low Current

µA4.5 10I

IH

PECL Input High Current

V1.82V

IL

PECL Input Low Voltage

V2.14V

IH

PECL Input High Voltage

164 205 250

A/A

135 170 205

A

I

I

APCSET

to IBIAS Gain

152 190 230

A/A

152 190 230

A

I

I

MODSET

to I

QMOD

Gain

128 160 195

A/A

145 170 200

A

I

I

BIASSET

to IBIAS Gain

A/A26 33 40A

I

MODMON to I

QMOD

Gain

A/A30 38 46A

I

BIASMON to IBIAS Gain

µA5 250I

BIAS

Bias Off Current

mA5 90I

BIAS

mA112 133I

CC

Supply Current (Note 3)
Bias Current Range

1100

ppm/°C

1100

Modulation Current Stability

480

1000

µA20 250I

BIAS

Modulation Off Current

Ω26 31 35R

PULL-UP

Internal Pull-Up Resistor
(Note 6)

V0.91 1.01 1.11V

REF

Reference Voltage (Note 7)

ppm/°C

500

Bias Current Stability

UNITSMIN TYP MAXSYMBOLPARAMETER

µA4I

DIL

TTL Disable Low Current

µA1I

DIH

TTL Disable High Current

V0.8V

DIL

TTL Disable Low Voltage

MAX3667

+3.3V, 622Mbps SDH/SONET Laser Driver

with Automatic Power Control

_______________________________________________________________________________________ 3

Note 1: Dice are tested at TA= +27°C.
Note 2: Minimum voltage at IBIAS = V

CC

- 1.6V.

Note 3: The sum of the currents flowing into V

CC

and PULLUP with R

BIASSET

= R

MODSET

= R

APCSET

= 2kΩ, IN+ = 1.82V,

IN- = 2.14V.

Note 4: APC is connected to BIASSET for closed-loop operation.
Note 5: Bias current range is guaranteed by the I

BIASSET

to IBIAS gain test.

Note 6: R

PULL-UP

is connected between IMOD and PULLUP.

Note 7: V

REF

is the voltage on BIASSET, MODSET, or APCSET with R

BIASSET

= R

MODSET

= R

APCSET

= 2kΩ.

Note 8: APC is disconnected from BIASSET for open-loop operation.
Note 9: Bias current stability is guaranteed by design and characterization.
Note 10: I

QMOD

is the current flowing into the collector of Q

MOD

(Figure 1).

Note 11: AC parameters are guaranteed by design and characterization.
Note 12: Modulation current range is guaranteed by the I

MODSET

to I

QMOD

gain test.

Note 13: Input signal is a 155Mbps 1-0 pattern. PWD = [(width of wider pulse) - (width of narrower pulse)] / 2.

Disable = high

Disable = high

Closed loop (Note 4)

R

APCSET

= 33.2kΩ

R

APCSET

= 2kΩ

VIN= 3.52V

VIN= 3.84V

R

MODSET

= 33.2kΩ (Note 10)

R

MODSET

= 2kΩ (Note 10)

R

BIASSET

= 2kΩ

R

MODSET

= 2kΩ (Note 10)

R

BIASSET

= 2kΩ

R

BIASSET

= 33.2kΩ

CONDITIONS

µA8I

IH

PECL Input Low Current

µA9I

IH

PECL Input High Current

V3.52V

IL

PECL Input Low Voltage

V3.84V

IH

PECL Input High Voltage

µA32 250Modulation Off Current

µA2 250

mA134 160I

CC

Supply Current (Note 3)
Bias Off Current

145 182 220

A/A

132 166 200

A

I

I

APCSET

to IBIAS Gain

188 230 285

A/A

168 240 315

A

I

I

MODSET

to I

QMOD

Gain

A/A38A

I

BIASMON to IBIAS Gain

A/A26 33 40A

I

MODMON to I

QMOD

Gain

A/A

145 180 220

A

I

I

BIASSET

to IBIAS Gain

143 180 215

UNITSMIN TYP MAXSYMBOLPARAMETER

VCC= 5.0V ±5%, 20% to 80%

VCC= 3.3V ±5%, 20% to 80%

R

FILT

= 22Ω, R

DAMP

= 0Ω (Note 12)

VCC= 3.3V ±5%, 20% to 80%
VCC= 5.0V ±5%, 20% to 80%

R

FILT

= 22Ω, R

DAMP

= 0Ω (Note 13)

CONDITIONS

205 400

ps

270 450

t

r

mA5 60I

MOD

Modulation Current Range
Output Rise Time

ps

425 650

t

f

Output Fall Time

315 600

%±10Output Aberrations

ps70PWDPulse-Width Distortion

UNITSMIN TYP MAXSYMBOLPARAMETER

DC ELECTRICAL CHARACTERISTICS

(VCC= +5.0V ±5%, TA= -40°C to +85°C, unless otherwise noted.) (Notes 1, 2)

AC ELECTRICAL CHARACTERISTICS

(VCC= +3.3V ±5%, TA= -40°C to +85°C, R

LOAD

= 10Ω, unless otherwise noted.) (Notes 2, 11)

MAX3667

+3.3V, 622Mbps SDH/SONET Laser Driver
with Automatic Power Control

4 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

(TA = +25°C, VCC= +3.3V, unless otherwise noted.)

161ps/div

52mV/

div

EYE DIAGRAM

(622Mbps, 1300nm LASER,

470MHz FILTER)

MAX3667-01

2

23

- 1PRBS

I

MOD

= 15mA

DIFF. INPUT = 640mVp-p

161ps/div

20mV/

div

EYE DIAGRAM

(622Mbps, 10Ω LOAD)

MAX3667-02

2

23

- 1PRBS

I

MOD

= 15mA

DIFF. INPUT = 1.7Vp-p

10ps/div

5mV/

div

OUTPUT JITTER

(622Mbps, 10Ω LOAD)

MAX3667-03

I

MOD

= 20mA
DIFF. INPUT = 1.7Vp-p
∆RMS = 3.2ps

180
160
140

0

200

1k

40k

I

BIAS

vs. R

BIASSET

60
40
20

120
100

80

MAX3667-04

R

BIASSET

(Ω)

I

BIAS

(mA)

10k

V

IBIAS

= 1.7V

10Ω LOAD

0

30
20
10

60
50
40

70

80

1k 10k 40k

I

BIAS

vs. R

APCSET

(VARYING MONITOR-TO-LASER

CURRENT GAIN)

MAX3667-07

R

APCSET

(Ω)

I

BIAS

(mA)

GAIN = 90

GAIN = 60

GAIN = 30

GAIN = 15

160
140
120

0

I

QMOD

vs. R

MODSET

60
40
20

100

80

MAX3667-05

R

MODSET

(Ω)

I

QMOD

(mA)

200

1k

40k10k

10Ω LOAD

0

0.4

0.3

0.2

0.1

0.7

0.6

0.5

0.8

0.9

1k 10k 40k

IMD vs. R

APCSET

R

APCSET

(Ω)

I

MD

(mA)

APC LOOP CLOSED
R

BIASSET

= 2kΩ

R

MODSET

= 2kΩ
MONITOR-TO-LASER
CURRENT GAIN = 82

MAX3667-06

0

20

60

40

100

80

120

-40 -15 10 35 60 85

PULSE-WIDTH DISTORTION

vs. TEMPERATURE

MAX3667toc08

PULSE-WIDTH DISTORTION (ps)

TEMPERATURE (°C)

VCC = +3.3V

VCC = +5.0V

I

MOD

= 30mA

0

20

60

40

100

80

120

10 20 30 40 50 5545352515 60

PULSE-WIDTH DISTORTION

vs. I

MOD

MAX3667toc09

PULSE-WIDTH DISTORTION (ps)

I

MOD

(mA)

VCC = +3.3V

VCC = +5.0V