Micrel, Inc.

MIC3003

November 2009

3

M9999-111209-C

Contents

Pin Configuration

.......................................................................................................................................................... 8

Pin Description

.............................................................................................................................................................. 8

Absolute Maximum Ratings

....................................................................................................................................... 10

Operating Ratings

....................................................................................................................................................... 10

Electrical Characteristics

........................................................................................................................................... 10

Serial Interface Timing Diagram

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

Serial Interface Address Maps

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

Block Diagram

............................................................................................................................................................. 18

Analog-to-Digital Converter/Signal Monitoring

........................................................................................................ 18

Alarms and Warnings Interrupt Source Masking

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

Alarms and Warnings as TXFAULT Source

............................................................................................................. 21

Latching of Alarms and Warnings

............................................................................................................................. 21

SMBus Multipart Support

........................................................................................................................................... 21

QGOP Pin Function

..................................................................................................................................................... 21

Calibration Modes

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

A/ External Calibration............................................................................................................................................ 22

Voltage ............................................................................................................................................................. 22

Temperature..................................................................................................................................................... 22

Bias Current ..................................................................................................................................................... 22

TX Power.......................................................................................................................................................... 22

RX Power ......................................................................................................................................................... 23

B/ Internal Calibration ............................................................................................................................................. 23

Computing Internal Calibration Results

........................................................................................................... 23

C/ Reading the ADC Result Registers.................................................................................................................... 25

RXPOT ................................................................................................................................................................... 25

Laser Diode Bias Control........................................................................................................................................ 25

Laser Modulation Control ....................................................................................................................................... 26

Power On and Laser Start-Up ................................................................................................................................ 27

Fault Comparators .................................................................................................................................................. 28

SHDN and TXFIN ................................................................................................................................................... 29

Temperature Measurement .................................................................................................................................... 30

Diode Faults............................................................................................................................................................ 30

Temperature Compensation................................................................................................................................... 30

Alarms and Warning Flags ..................................................................................................................................... 32

Control and Status I/O ............................................................................................................................................ 32

System Timing

............................................................................................................................................................. 34

Warm Resets .......................................................................................................................................................... 36

Power-On Hour Meter............................................................................................................................................. 36

Test and Calibration Features ................................................................................................................................ 37

Serial Port Operation .............................................................................................................................................. 38

Block Writes............................................................................................................................................................ 38

Acknowledge Polling............................................................................................................................................... 39

Write Protection and Data Security ........................................................................................................................ 39

OEM Password

................................................................................................................................................ 39

OEM Mode and User Mode

............................................................................................................................. 39

Detailed Register Descriptions

.................................................................................................................................. 40