MAX3736ETE+T Datasheet MAX3736ETE+T | P1-P3

General Description

The MAX3736 is a compact, +3.3V multirate laser driver

for SFP/SFF applications up to 3.2Gbps. The device

accepts differential data and provides bias and modula-

tion currents for driving a laser. DC-coupling to the laser

allows for multirate applications, and reduces the num-

ber of external components.

The wide 5mA to 60mA (85mA AC-coupled) modulation

current range and 1mA to 100mA bias current make the

MAX3736 ideal for driving FP/DFB laser diodes in fiber-

optic modules. The laser current setting can be con-

trolled by a current DAC, a voltage DAC, or a resistor.

Very low power dissipation, small package size, and

reduced component count, make this part an ideal solu-

tion for SFP-module applications.

The MAX3736 is available in a small 3mm x 3mm, 16-pin

thin QFN package. It operates over a -40°C to +85°C

temperature range.

Applications

Gigabit Ethernet SFP/SFF Transceiver Modules

1G/2G Fibre-Channel SFP/SFF Transceiver

Modules

Multirate OC-3 to OC-48 FEC SFP/SFF

Transceiver Modules

10G Ethernet LX-4 Modules

Features

♦ Fully Compatible with SFP and SFF-8472

Specifications

♦ Programmable Modulation Current from 5mA to

60mA (DC-Coupled)

♦ Programmable Modulation Current from 5mA to

85mA (AC-Coupled)

♦ Programmable Bias Current from 1mA to 100mA

♦ 56ps Edge Transition Times

♦ 22mA (typ) Power-Supply Current

♦ Multirate Operation Up to 3.2Gbps

♦ On-Chip Pullup Resistor for DIS

♦ 16-Pin, 3mm × 3mm Thin QFN Package

MAX3736

3.2Gbps, Low-Power, Compact,

SFP Laser Driver

________________________________________________________________

Maxim Integrated Products

Ordering Information

+3.3V

SUPPLY FILTER

OUT-

OUT+

BIAS

BIASSET

MODSET

IN+

IN-

MOD-DEF1

MOD-DEF2

TX_DISABLE

LASER CONTROLLER

15Ω 56Ω

10Ω

8.2pF

0.01μF

FERRITE

BEAD

0.1μF

GND

DIS

SERDES

HOST FILTER

VCC_RX

BC_MON

50Ω

HOST BOARD SFP OPTICAL TRANSMITTER

MAX3736

Typical Application Circuit

19-3116; Rev 2; 9/10

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Denotes a lead(Pb)-free/RoHS-compliant package.

EP = Exposed pad.

PART TEMP RANGE PIN-PACKAGE

MAX3736ETE -40°C to +85°C 16 Thin QFN-EP*

MAX3736ETE+ -40°C to +85°C 16 Thin QFN-EP*

Pin Configuration appears at end of data sheet.

MAX3736

3.2Gbps, Low-Power, Compact,

SFP Laser Driver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= +2.97V to +3.63V, T

= -40°C to +85°C. Typical values are at V

= +3.3V, I

BIAS

= 20mA, I

MOD

= 30mA, T

= +25°C, 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.

Power-Supply Voltage V

..................................-0.5V to +6.0V

Voltage at IN+, IN-, DIS…..…………………-0.5V to (V

+ 0.5V)

Voltage at BC_MON, MODSET, BIASSET .............-0.5V to +3.0V

Voltage at OUT+, OUT-.……………………+0.5V to (V

+ 1.5V)

Voltage at BIAS ............……………………+0.5V to (V

+ 0.5V)

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

Current into IN+, IN-......…………………………-20mA to +20mA

Continuous Power Dissipation (T

= +85°C)

16-Pin Thin QFN (derate 25mW/°C above +85°C) .............2W

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

Storage Temperature Range .............................-55°C to +150°C

Die Attach Temperature ..................................................+400°C

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

Soldering Temperature (reflow)

Lead(Pb)-free...............................................................+260°C

Containing lead(Pb) .....................................................+240°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Power-Supply Current I

Excludes the laser bias and modulation

currents (Note 2)

22 35 mA

I/O SPECIFICATIONS

Differential Input Voltage V

= V

IN+

- V

IN-

, Figure 1 0.2 2.4 V

P-P

Common-Mode Input Voltage V

INCM

0.6 

Differential Input Resistance R

85 100 115 

DIS Input Pullup Resistance R

PULL

4.7 7.2 10.0 k

DIS

= V

DIS Input Current

DIS

= V

GND

, V

= 3.3V, R

PULL

= 7.4k -450

μA

DIS Input High Voltage V

2.0 V

DIS Input Low Voltage V

0.8 V

BIAS GENERATOR

Bias Current Range I

BIAS

Current into BIAS pin 1 100 mA

Bias Off-Current I

BIASOFF

Current into BIAS pin, DIS asserted high 100 μA

5mA  I

BIAS

 10mA 70 85 95

BIASSET Current Gain G

BIAS

(Note 3)

10mA  I

BIAS

 100mA 79 85 91

A/A

BIASSET Current Gain Stability 10mA  I

BIAS

 100mA (Note 4) -4.4 +4 %

BIASSET Current Gain Linearity 10mA  I

BIAS

 100mA (Note 5) -2.3 +2.3 %

Bias Overshoot

During SFP module hot plugging;

see Figure 3 (Notes 5, 6)

10 %

Bias-Current Monitor Gain (Note 5) 13.7 mA/A

1mA  I

BIAS

 5mA |4|

5mA  I

BIAS

 10mA -7 |2.8| +7

Bias-Current Monitor Gain

Stability (Notes 4, 5)

10mA  I

BIAS

 100mA -5 |2.4| +5

MAX3736

3.2Gbps, Low-Power, Compact,

SFP Laser Driver

_______________________________________________________________________________________ 3

Note 1: Specifications at -40°C are guaranteed by design and characterization.

Note 2: Maximum value is specified at I

MOD

= 60mA and IBIAS = 100mA. BC_MON connected to V

Note 3: Modulation current gain, G

MOD

, is defined as G

MOD

= I

MOD

/ I

MODSET

. Bias current gain, G

BIAS

, is defined as G

BIAS

/ I

BIASSET

. The nominal gain is measured at V

= +3.3V and T

= +25°C.

Note 4: Gain stability is defined as [(Gain) - (Nom_Gain)] / (Nom_Gain) over the listed current range, temperature, and supply

variation. Nominal gain is measured at V

= +3.3V, T

= +25°C. The voltage at the BC_MON pin must not exceed 1.39V.

Note 5: Guaranteed by design and characterization; see Figure 2.

Note 6: V

turn-on time must be less than 0.8s, DC-coupled interface.

Note 7: The gain matching is defined as ABS [(G

MOD

BIAS

- G

MODNOM

BIASNOM

)/(G

MODNOM

BIASNOM

)] over the specified

temperature and voltage supply range.

Note 8: For supply noise tolerance, noise is added to the supply (100mV

P-P

) up to 2MHz; see Figure 3.

ELECTRICAL CHARACTERISTICS (continued)

= +2.97V to +3.63V, T

= -40°C to +85°C. Typical values are at V

= +3.3V, I

BIAS

= 20mA, I

MOD

= 30mA, T

= +25°C, unless

otherwise noted.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Current into OUT+, R

= 15,

OUT+

and V

OUT-

 0.6V (DC-coupled)

5 60

Modulation Current Range I

MOD

Current into OUT+, R

= 15,

OUT+

and V

OUT-

 2.0V (AC-coupled)

5 85

P-P

MODULATOR

5mA  I

MOD

 10mA 70 85 95

Modulation Current Gain G

MOD

(Note 3)

10mA  I

MOD

 85mA 79 85 91

A/A

Modulation Current Gain Stability 10mA  I

MOD

 85mA (Notes 4, 5) -4.4 +4 %

Modulation Current Gain Linearity 10mA  I

MOD

 85mA (Note 5) -3.3 +3.3 %

BIASSET

= 0.15mA; I

MODSET

= 0.7mA 2.3

BIASSET

= I

MODSET

= 0.15mA 0.1 1.4

BIASSET

= I

MODSET

= 0.4mA 0.1 1

BIASSET

= I

MODSET

= 0.6mA 0.1 1

Bias Current Gain and

Modulation Current Gain

Matching (Notes 5, 7)

BIASSET

= I

MODSET

= 0.9mA 0.1 1

Modulation OFF Current I

MODOFF

DIS asserted high 100 μA

Rise Time t

20% to 80%; 10mA  I

MOD

 60mA (Note 5) 48 80 ps

Fall Time t

80% to 20%; 10mA  I

MOD

 60mA (Note 5) 58 80 ps

10mA  I

MOD

 60mA; 2.67Gbps;

-1 PRBS

16 38

10mA  I

MOD

 60mA; 3.2Gbps;

K28.5 pattern

17 38

10mA  I

MOD

 60mA; 155Mbps;

-1 PRBS

P-P

Deterministic Jitter

(Notes 5, 8)

10mA  I

MOD

 60mA; 3.2Gbps; K28.5;

= +100°C

6.3 ps

Random Jitter 10mA  I

MOD

 60mA (Note 5) 0.6 1 ps

RMS

P1-P3 P4-P6 P7-P9 P10-P11

MAX3736ETE+T

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Manufacturer:

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Laser Drivers 3.2Gbps Low-Power SFP Laser Driver

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