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MIC3001: 产品描述FOM Management IC with Internal Calibration; 文件大小1MB，共76页; 制造商Microchip(微芯科技); 官网地址https://www.microchip.com

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MIC3001概述

FOM Management IC with Internal Calibration

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MIC3001

FOM Management IC with Internal

Calibration

Consider MIC3003 for New Designs

General Description

The MIC3001 enables the implementation of sophisticated,

hot-pluggable fiber optic transceivers with intelligent laser

control and an internally calibrated digital diagnostic

monitoring interface per SFF-8472. It essentially integrates

all non-data path functions of an SFP transceiver into a

tiny (4mm

4mm) QFN package.

A highly-configurable automatic power control (APC)

circuit controls laser bias. Bias and modulation are

temperature compensated using dual DACs, an on-chip

temperature sensor, and NVRAM look-up tables. A

programmable internal feedback resistor provides

unprecedented dynamic range for APC. Controlled laser

turn-on facilitates hot plugging.

An analog-to-digital converter converts the measured

temperature, voltage, bias current, transmit power, and

received power from analog to digital. An EEPOT provides

front-end adjustment of RX power. Each parameter is

compared against user-programmed warning and alarm

thresholds. Analog comparators and DACs provide high-

speed monitoring of received power and critical laser

operating parameters. Data can be reported as either

internally calibrated or externally calibrated.

An interrupt output, power-on hour meter, and data-ready

bits add user friendliness beyond SFF-8472. The interrupt

output and data-ready bits reduce overhead in the host

system. The power-on hour meter logs operating hours

using an internal real-time clock and stores the result in

NVRAM.

Communication with the MIC3001 is via an industry

standard 2-wire serial interface. Nonvolatile memory is

provided for serial ID, configuration, and separate OEM

and user scratchpad spaces. Two-level password

protection guards against data corruption.

Data sheets and support documentation can be found on

Micrel’s web site at:

www.micrel.com.

Features

•

APC or constant-current laser bias

•

Turbo mode for APC loop start-up and shorter laser turn

on time

•

Supports multiple laser types and bias circuit topologies

•

Drives external low-cost BJT for laser bias

•

Integrated digital temperature sensor

•

Temperature compensation of modulation, bias, and

fault levels via NVRAM look-up tables

•

Direct interface to SY88932, SY88982, SY89307 and

other drivers

•

NVRAM to support GBIC/SFP serial ID function

•

User writable EEPROM scratchpad

•

Diagnostic monitoring interface per SFF-8472

−

Monitors and reports critical parameters:

temperature, bias current, TX and RX optical

power, and supply voltage

−

S/W control and monitoring of TXFAULT, RXLOS,

RATESELECT, and TXDISABLE

−

Internal or external calibration

−

EEPOT for adjusting RX power measurement

•

Power-on hour meter

•

Interrupt capability

•

Extensive test and calibration features

•

2-wire, I

C-compatible serial interface

•

SFP MSA and SFF-8472 compliant

•

3.0V to 3.6V power supply range

•

5V-tolerant I/O

•

4mm

4mm 24-pin QFN package

Applications

•

SFF/SFP optical transceivers

SONET/SDH transceivers and transponders

Fibre channel transceivers

10Gbps transceivers

Free space optical communications

Proprietary optical links

MLF and

MicroLeadFrame

are registered trademarks of Amkor Technology

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

408

) 944-0800 • fax + 1 (408) 474-1000 •

http://www.micrel.com

August 2004

M9999-082404-A

hbwhelp@micrel.com

or (408) 955-1690

Micrel, Inc.

MIC3001

Contents

General Description

...................................................................................................................................................... 1

Applications

................................................................................................................................................................... 1

Ordering Information

.................................................................................................................................................... 2

Pin Configuration

.......................................................................................................................................................... 7

Pin Description

.............................................................................................................................................................. 7

Absolute Maximum Ratings

......................................................................................................................................... 9

Operating Ratings

......................................................................................................................................................... 9

Electrical Characteristics

............................................................................................................................................. 9

Timing Diagram

........................................................................................................................................................... 14

Address Map

................................................................................................................................................................ 15

Block Diagram

............................................................................................................................................................. 17

MIC3000 Capability......................................................................................................................................................

Analog-to-Digital Converter/Signal Monitoring.......................................................................................................... 17

Internal/External Calibration...................................................................................................................................... 19

A/ External Calibration .............................................................................................................................................. 19

Voltage

.................................................................................................................................................................. 19

Temperature

......................................................................................................................................................... 19

Bias Current

.......................................................................................................................................................... 19

TX Power

.............................................................................................................................................................. 19

RX Power

.............................................................................................................................................................. 20

B/ Internal Calibration

................................................................................................................................................. 20

C/ ADC Result Registers Reading

............................................................................................................................. 22

RXPOT ...................................................................................................................................................................... 22

Laser Diode Bias Control .......................................................................................................................................... 22

Laser Modulation Control .......................................................................................................................................... 23

Power ON and Laser Start-Up .................................................................................................................................. 24

Fault Comparators .................................................................................................................................................... 25

SHDN and TXFIN ..................................................................................................................................................... 26

Temperature Measurement ...................................................................................................................................... 26

Diode Faults .............................................................................................................................................................. 26

Temperature Compensation ..................................................................................................................................... 26

Alarms and Warning Flags........................................................................................................................................ 31

Control and Status I/O .............................................................................................................................................. 31

System Timing

............................................................................................................................................................. 32

Warm Resets ............................................................................................................................................................ 35

Power-On Hour Meter ............................................................................................................................................... 35

Test and Calibration Features .................................................................................................................................. 35

Serial Port Operation ................................................................................................................................................ 36

Page Writes .............................................................................................................................................................. 36

Acknowledge Polling ................................................................................................................................................. 37

Write Protection and Data Security ........................................................................................................................... 37

OEM Password

..................................................................................................................................................... 37

User Password

..................................................................................................................................................... 37

Detailed Register Descriptions

.................................................................................................................................. 38

Alarm Threshold Registers

........................................................................................................................................ 38

Warning Threshold Registers

.................................................................................................................................... 43

ADC Result Registers

................................................................................................................................................. 49

August 2004

M9999-082404-A

hbwhelp@micrel.com

or (408) 955-1690

Micrel, Inc.

MIC3001

Alarm Flags

.................................................................................................................................................................. 52

Warning Flags

.............................................................................................................................................................. 53

Applications Information

............................................................................................................................................ 69

Controlling Laser Diode Bias

..................................................................................................................................... 69

Choosing C

COMP

........................................................................................................................................................ 70

Measuring Laser Bias Current .................................................................................................................................. 70

Interfacing To Laser Drivers...................................................................................................................................... 70

SY88912 3.3V 3.2Gbps SONET/SDH Laser Driver ................................................................................................. 71

Modulation Current ................................................................................................................................................... 71

SY88932 3.3V 3.2Gbps SONET/SDH Laser Driver ................................................................................................. 71

SY89307 5.0V/ 3.3V 2.5Gbps VCSEL Driver ........................................................................................................... 72

Laser Drivers Programmed via a Sink Current ......................................................................................................... 72

Drivers with Monitor Outputs .................................................................................................................................... 72

Shutdown Output ...................................................................................................................................................... 72

Temperature Sensing ............................................................................................................................................... 73

Remote Sensing ....................................................................................................................................................... 73

Minimizing Errors

........................................................................................................................................................ 73

Self-Heating .............................................................................................................................................................. 73

Series Resistance with External Temperature Sensor ............................................................................................. 74

XPN Filter Capacitor Selection ................................................................................................................................. 74

XPN Layout Considerations ...................................................................................................................................... 74

Layout Considerations .............................................................................................................................................. 75

Small Form-Factor Pluggable (SFP) Transceivers...............................................................................................

Power Supplies ......................................................................................................................................................... 75

Using the MIC3001 In a 5V System .......................................................................................................................... 75

Package Information

................................................................................................................................................... 76

August 2004

M9999-082404-A

hbwhelp@micrel.com

or (408) 955-1690

Micrel, Inc.

MIC3001

List of Figures

Figure 1. MIC3001 Block Diagram ................................................................................................................................................... 17

Figure 2. Analog-to-Digital Converter Block Diagram....................................................................................................................... 18

Figure 3. RXPOT Block Diagram ..................................................................................................................................................... 22

Figure 4. MIC3001 APC and Modulation Control Block Diagram .................................................................................................... 22

Figure 5. Programmable Feedback Resistor .................................................................................................................................... 22

Figure 6. Transmitter Configurations Supported by MIC3001 ......................................................................................................... 23

Figure 7. V

MOD

Configured as Voltage Output with Gain ................................................................................................................. 23

Figure 9. Fault Comparator Logic..................................................................................................................................................... 25

Figure 10. Saturation Detector ......................................................................................................................................................... 26

Figure 11. RXLOS Comparator Logic .............................................................................................................................................. 26

Figure 12. Examples of LUTOFF Operation ..................................................................................................................................... 29

Figure 13. Temperature Compensation Examples ........................................................................................................................... 30

Figure 14. Control and Status I/O Logic ........................................................................................................................................... 32

Figure 15. Transmitter ON-OFF Timing ........................................................................................................................................... 32

Figure 16. Initialization Timing with TXDISABLE Asserted .............................................................................................................. 32

Figure 17. Initialization Timing with TXDISABLE Not Asserted ........................................................................................................ 33

Figure 18. Loss-of-Signal (LOS) Timing ........................................................................................................................................... 33

Figure 20. Successfully Clearing a Fault Condition .......................................................................................................................... 34

Figure 21. Unsuccessful Attempt to Clear a Fault ............................................................................................................................ 34

Figure 22. Write Byte Protocol ......................................................................................................................................................... 36

Figure 23. Read Byte Protocol ......................................................................................................................................................... 36

Figure 24. Read_Word Protocol ....................................................................................................................................................... 36

Figure 25. Four-Byte Page_White Protocol ...................................................................................................................................... 37

Figure 26. Example APC Circuit for Common-Cathode TOSA ........................................................................................................ 69

Figure 27. Example APC Circuit for Common Anode TOSA ............................................................................................................ 69

Figure 28. Slew Rate vs. C

COMP

Value ............................................................................................................................................. 70

Figure 29. Open Loop Unity-Gain Bandwidth vs. C

COMP

................................................................................................................. 70

Figure 31. Controlling the SY88932 Modulation Current .................................................................................................................. 71

Figure 32. Controlling the SY89307 Modulation Current .................................................................................................................. 72

Figure 33. Controlling the Modulation Current via a Sink Current ................................................................................................... 72

Figure 34. Redundant Switch Circuits .............................................................................................................................................. 73

Figure 35. Guard Traces and Kelvin Return for Remote Thermal Diode......................................................................................... 75

Figure 36. Typical SFP Control and Status I/O Signal Routing (not to scale) ................................................................................. 75

Figure 37. Power Supply Routing and Bypassing ............................................................................................................................ 75

August 2004

M9999-082404-A

hbwhelp@micrel.com

or (408) 955-1690

MIC3001相似产品对比

	MIC3001	MIC3001BMLTR	MIC3001GMLTR	MIC3001BML	MIC3001_11	MIC3001BML-TR
描述	FOM Management IC with Internal Calibration	FOM Management IC with Internal Calibration	FOM Management IC with Internal Calibration	FOM Management IC with Internal Calibration	FOM Management IC with Internal Calibration	IC FOM MANAGEMENT W/CALIBR 24MLF

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