MIC3000

Micrel

M9999-101204

2

October 2004

Contents

General Description ............................................................................................................................................................................ 1

Features ............................................................................................................................................................................................... 1

Applications ......................................................................................................................................................................................... 1

Ordering Information .......................................................................................................................................................................... 1

Pin Configuration ................................................................................................................................................................................ 5

24-Lead MLF™ ..................................................................................................................................................................................... 5

Pin Descriptions .............................................................................................................................................................................. 5-6

Absolute Maximum Ratings ............................................................................................................................................................... 7

Operating Ratings ............................................................................................................................................................................... 7

Electrical Characteristics .............................................................................................................................................................. 7-11

Timing Diagram ................................................................................................................................................................................. 11

Serial Interface Timing ..................................................................................................................................................................... 11

Address Map ...................................................................................................................................................................................... 12

Table 1. MIC3000 Address Map, Serial address = A0h .................................................................................................................. 12

Table 2. MIC3000 Address Map, Serial Address = A2h .................................................................................................................. 12

Table 3. Temperature Compensation Tables, Serial Address = A4h .............................................................................................. 13

Table 4. OEM Configuration Registers, Serial Address = A6h ........................................................................................................ 13

Block Diagram ................................................................................................................................................................................... 14

Figure 1. MIC3000 Block Diagram .................................................................................................................................................. 14

Analog-to-Digital Converter/Signal Monitoring .............................................................................................................................. 14

Figure 2. Analog-to-Digital Converter Block Diagram ..................................................................................................................... 15

Table 5. A/D Input Signal Ranges and Resolutions ........................................................................................................................ 15

Table 6. VAUX Input Signal Ranges and Resolutions .................................................................................................................... 15

External Calibration .......................................................................................................................................................................... 16

Voltage ............................................................................................................................................................................................... 16

Temperature ...................................................................................................................................................................................... 16

Bias Current ....................................................................................................................................................................................... 16

TX Power ............................................................................................................................................................................................ 16

RX Power ........................................................................................................................................................................................... 16

Laser Diode Bias Control ................................................................................................................................................................. 17

Figure 3. MIC3000 APC and Modulation Control Block Diagram .................................................................................................... 17

Figure 4. Programmable Feedback Resistor ................................................................................................................................... 17

Laser Modulation Control ................................................................................................................................................................. 17

Figure 5. Transmitter Configurations Supported by MIC3000 .................................................................................................. 17

Figure 6. VMOD Configured as Voltage Output with Gain ........................................................................................................ 18

Power ON and Laser Start-Up .......................................................................................................................................................... 19

Table 8. Shutdown State of SHDN vs. Configuration Bits ............................................................................................................... 19

Figure 7. MIC3000 Power-On Timing (OE=1) ................................................................................................................................. 19

Table 9. Shutdown State of VBIAS vs. Configuration Bits .............................................................................................................. 19

Table 10. Shutdown state of VMOD vs. Configuration bits ............................................................................................................. 19

Fault Comparators ............................................................................................................................................................................ 20

Figure 8. Fault Comparator Logic .................................................................................................................................................... 20

Duty-Cycle Limiting .......................................................................................................................................................................... 20

Temperature Measurement .............................................................................................................................................................. 20

Diode Faults ....................................................................................................................................................................................... 20

Figure 9. Saturation Detector .......................................................................................................................................................... 21

Figure 10. RXLOS Comparator Logic ............................................................................................................................................. 21

Temperature Compensation ............................................................................................................................................................ 21

Table 11. Temperature Compensation Look-up Tables, Serial Address I2CADR + 4h .................................................................. 22