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