MAX3799 Maxim Integrated Products, MAX3799 Datasheet

MAX3799

Manufacturer Part Number

MAX3799

Description

SFP+ Multirate Limiting Amplifier And VCSEL Driver

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX3799.pdf (35 pages)

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The MAX3799 is a highly integrated limiting amplifier

and VCSEL driver that operates up to 14Gbps, making

it suitable for Ethernet and Fibre Channel applications.

By providing a selectable data path with a noise-shap-

ing filter, the MAX3799 enables a module with 10G

optics to be fully compliant with both 1000BASE-SR

and 10GBASE-SR specifications. Operating from a sin-

gle +3.3V supply, this low-power integrated limiting

amplifier and VCSEL driver IC enables a platform

design for SFP MSA as well as for SFP+ MSA-based

optical transceivers. The high-sensitivity limiting ampli-

fier limits the differential input signal generated by a

transimpedance amplifier into a CML-level differential

output signal. The compact VCSEL driver provides a

modulation and a bias current for a VCSEL diode. The

optical average power is controlled by an average

power control (APC) loop implemented by a controller

that interfaces to the VCSEL driver through a 3-wire

digital interface. All differential I/Os are optimally back-

terminated for a 50Ω transmission line PCB design.

The use of a 3-wire digital interface reduces the pin

count while enabling advanced Rx (rate selection, LOS

threshold, LOS squelch, LOS polarity, CML output level,

signal path polarity, deemphasis, and fast mode-select

change time) and Tx settings (modulation current, bias

current, polarity, and eye safety control) without the

need for external components. The MAX3799 provides

multiple current and voltage DACs to allow the use of

low-cost controller ICs.

The MAX3799 is packaged in a lead-free, 5mm x 5mm,

32-pin TQFN package.

19-4695; Rev 0; 8/09

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.

1000BASE-SR/10GBASE-SR Multirate SFP+

Optical Transceiver

1x/2x/4x/8x/16x SFF/SFP/SFP+ MSA Fibre

Channel (FC) Optical Transceiver

1Gbps to 14Gbps, SFP+ Multirate Limiting

________________________________________________________________ Maxim Integrated Products

General Description

Applications

Amplifier and VCSEL Driver

♦ Enables Single-Module Design Compliance with

♦ -21.5dBm Optical Sensitivity at 1.25Gbps Using a

♦ Low Power Dissipation of 320mW at 3.3V Power

♦ Typical Electrical Performance of 14.025Gbps on

♦ 3mV

♦ 4ps

♦ 26ps Rise and Fall Time at Rx/Tx Output

♦ Rate Select for 1Gbps Mode or 10Gbps Mode

♦ CML Output Squelch

♦ Polarity Select for Rx and Tx

♦ LOS Assert Level Adjustment

♦ LOS Polarity Select

♦ Modulation Current Up to 12mA Into 100Ω

♦ Bias Current Up to 15mA

♦ Integrated Eye Safety Features

♦ 3-Wire Digital Interface

♦ Programmable Deemphasis at Tx Output

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

* EP = Exposed pad.

Typical Application Circuit and Pin Configuration appear at

end of data sheet.

1000BASE-SR and 10GBASE-SR Specifications

10.32Gbps ROSA (-19.7dBm OMA)

Supply

Rx/Tx (Non-Retimed 16x Fibre Channel Solution)

Differential Load

MAX3799ETJ+

P-P

- 1 PRBS

PART

P-P

DJ at Receiver Output at 8.5Gbps 8B/10B

DJ at Receiver Output at 10.32Gbps

Receiver Sensitivity at 10.32Gbps

-40°C to +85°C

TEMP RANGE

Ordering Information

PIN-PACKAGE

32 TQFN-EP*

Features

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