MAX3935(2002) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX3935
(Rev.:2002)

10.7Gbps EAM Driver

Maxim Integrated 

19-4803; Rev 1; 12/02

10.7Gbps EAM Driver

General Description

The MAX3935 is designed to drive an electro-absorp-

tion modulator (EAM) at data rates up to 10.7Gbps. It

provides programmable output levels through external-

ly adjustable bias and modulation currents. This EAM

driver is fabricated with Maxim’s in-house second-gen-

eration SiGe process.

The MAX3935 accepts differential ECL or ground-refer-

enced CML clock and data-input signals. Inputs are

terminated with on-chip 50Ω resistors. An input-data

retiming latch can be used to reject input-pattern-

dependent jitter if a clock signal is available.

The driver can modulate EAM devices at amplitudes up

to 3.0VP-P when the device impedance is 50Ω. Typical

(20% to 80%) edge speeds are 34ps. The output has

an on-chip 75Ω resistor for back termination. The

MAX3935 allows for an EAM bias voltage up to 1.2V.

The MAX3935 also includes an adjustable pulse-width

control circuit to precompensate for asymmetrical EAM

characteristics.

Applications

SONET OC-192 and SDH STM-64

Transmission Systems

DWDM

Metro and Long-Haul Transmitters

Add/Drop Multiplexers

Features

o Single -5.2V Power Supply

o Low 110mA Supply Current

o 34ps Typical Rise/Fall Time

o Up to 10.7Gbps (NRZ) Operation

o On-Chip Termination Resistors

o Programmable Modulation Voltage Up to 3.0VP-P

o Programmable EAM Bias Voltage Up to 1.2V

o Adjustable Pulse-Width Control

o Selectable Data Retiming Latch

o Modulation Enable Control

o ESD Protection

Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX3935EGJ

-40°C to +85°C 32 QFN-EP*

MAX3935E/D

-40°C to +85°C Dice**

*EP = exposed pad.

**Dice are designed to operate over this range, but are tested and

guaranteed at TA = +25°C only. Contact factory for availability.

For the latest package outline information, go to

www.maxim-ic.com/packages.

Pin Configuration appears at end of data sheet

Typical Application Circuit

VBIASREF

DATA+

DATA-

MAX3952

10Gbps SERIALIZER

CLK+

CLK-

-5.2V

-5.2V

BIASMON

BIASSET GND

50Ω

DATA+

MODN1

50Ω

DATA-

MOD

MAX3935

MODN2

VTT

EAM

50Ω

50Ω

VOUT

50Ω

CLK+

50Ω

CLK-

BIAS

L

PWC+ PWC- MODEN RTEN MODMON MODSET VEE

RPWC

2kΩ

-5.2V

-5.2V

100pF

100Ω -5.2V

-5.2V

REPRESENTS A CONTROLLED–IMPEDANCE TRANSMISSION LINE

†Covered by U.S. patent number 5,883,910.

VMODREF

-5.2V

-5.2V

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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