MIC3000 Datasheet, PDF (2/68 Pages) Micrel Semiconductor – SFP Management IC

MIC3000
Contents
Micrel
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
M9999-101204
2
October 2004