Rainbow-electronics MAX3746 Uživatelský manuál stáhnout pdf

General Description

The MAX3746 multirate limiting amplifier functions as a

data quantizer for SONET, Fibre-Channel, and Gigabit

Ethernet optical receivers. The amplifier accepts a wide

range of input voltages and provides selectable-level,

current-mode logic (CML) output voltages with con-

trolled edge speeds. A received-signal-strength indica-

tor (RSSI) is available when the MAX3746 is

DC-coupled to the MAX3744/MAX3724 SFP transim-

pedance amplifier (TIA). A receiver consisting of the

MAX3744/MAX3724 and the MAX3746 can provide up

to 19dB RSSI dynamic range. Additional features

include a programmable loss-of-signal (LOS) detect, an

optional disable function (DISABLE), and an

output-signal polarity reversal (OUTPOL). Output dis-

able can be used to implement squelch.

The combination of the MAX3746 and the MAX3744/

MAX3724 allows for the implementation of all the small-

form-factor SFF-8472 digital diagnostic specifications

using a standard 4-pin TO-46 header.

The MAX3746 is pin-for-pin compatible with the

MAX3748A limiting amplifier and consumes 30% less

power. The MAX3746 is packaged in a 3mm x 3mm,

16-pin QFN package.

Applications

Gigabit Ethernet SFF/SFP Transceiver Modules

Fibre-Channel SFF/SFP Transceiver Modules

Multirate OC-12 to OC48-FEC SFF/SFP

Transceiver Modules

Features

♦ SFP Reference Design Available

♦ Low 115mW Power Consumption

♦ 16-Pin QFN Package with 3mm x 3mm Footprint

♦ 70ps Rise and Fall Time

♦ Loss-of-Signal with Programmable Threshold

♦ RSSI Interface (with MAX3744/MAX3724 TIA)

♦ Output Disable

♦ Polarity Select

♦ 8.4ps

P-P

Deterministic Jitter (3.2Gbps)

♦ Improved EMI Performance

♦ Selectable CML Output levels

♦ Pin Compatible with MAX3748A

MAX3746

Low-Power, 622Mbps to 3.2Gbps

Limiting Amplifier

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3386; Rev 0; 8/04

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.

PART TEMP RANGE PIN-PACKAGE PKG CODE

MAX3746ETE -40°C to +85°C 16 QFN T1633F-3

Typical Operating Circuits continued at end of data sheet.

Pin Configuration appears at end of data sheet.

MAX3746

MAX3744 TIA

DS1859

3-INPUT DIAGNOSTIC

MONITOR

3kΩ

0.1µF

IN+

IN-

RSSI TH DISABLE LOS

OUTPOL V

GND

4.7kΩ TO 10kΩ

LOS

2.97V TO 3.6V

OUT+

50Ω

0.1µF

OUT-

50Ω

0.1µF

SERDES

= 14kΩ

SUPPLY FILTER HOST FILTER

_RX

4-PIN TO HEADER

HOST BOARDSFP OPTICAL RECEIVER

Typical Operating Circuits

1 2 3 4 5 6 ... 11 12

Limiting Amplifier 1

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Strany 1 - Limiting Amplifier

General DescriptionThe MAX3746 multirate limiting amplifier functions as adata quantizer for SONET, Fibre-Channel, and GigabitEthernet optical receive

Strany 2

MAX3746Low-Power, 622Mbps to 3.2Gbps Limiting Amplifier10 ______________________________________________________________________________________50Ω 50

Strany 3

MAX3746Low-Power, 622Mbps to 3.2Gbps Limiting Amplifier______________________________________________________________________________________ 11Typica

Strany 4

MAX3746Low-Power, 622Mbps to 3.2Gbps Limiting AmplifierMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embod

Strany 5

MAX3746Low-Power, 622Mbps to 3.2Gbps Limiting Amplifier2 _______________________________________________________________________________________ABSOLU

Strany 6

MAX3746Low-Power, 622Mbps to 3.2Gbps Limiting Amplifier_______________________________________________________________________________________ 3ELECTR

Strany 7

Typical Operating Characteristics(VCC= +3.3V, TA = +25°C, unless otherwise noted.)MAX3746Low-Power, 622Mbps to 3.2Gbps Limiting Amplifier4 ___________

Strany 8

MAX3746Low-Power, 622Mbps to 3.2Gbps Limiting Amplifier_______________________________________________________________________________________ 5RANDOM

Strany 9

MAX3746Low-Power, 622Mbps to 3.2Gbps Limiting Amplifier6 _______________________________________________________________________________________INPUT

Strany 10

MAX3746Low-Power, 622Mbps to 3.2Gbps Limiting Amplifier_______________________________________________________________________________________ 7PIN NA

Strany 11

MAX3746Power Detect and Loss-of-Signal IndicatorThe MAX3746 is equipped with multirate LOS circuitrythat indicates when the input signal is below a pr

Strany 12

Select the Coupling CapacitorWhen AC coupling is desired, coupling capacitors CINand COUTshould be selected to minimize the receiv-er’s deterministic

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Rainbow-electronics MAX3746 Uživatelský manuál

Procházejte online nebo si stáhněte Uživatelský manuál pro Komunikace Rainbow-electronics MAX3746. Rainbow Electronics MAX3746 User Manual Uživatelská příručka

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