AK2401 Datasheet, PDF (3/103 Pages) Asahi Kasei Microsystems – Direct Conversion Transceiver

[AK2401]
13.7.4. Fast Lock Function.......................................................................................................... 42
13.7.5. Lock Detection ................................................................................................................ 43
13.8. Digital Receiving Circuit (ADC, DIGITAL FILTER, RSSI, AGC, ADC P/S IF) ....................... 45
13.8.1. ADC................................................................................................................................. 45
13.8.2. Digital Filter Frequency Characteristics.......................................................................... 45
13.8.3. Programmable FIR Filter ................................................................................................ 48
13.8.4. High-Pass Filter .............................................................................................................. 53
13.8.5. Fast Track Mode ............................................................................................................. 55
13.8.6. DC Offset Calibration ...................................................................................................... 57
13.8.7. RDOC Function............................................................................................................... 59
13.8.8. AGC Function ................................................................................................................. 60
13.8.9. AGC_KEEP Function...................................................................................................... 64
13.8.10. RSSI Function ................................................................................................................. 66
13.8.11. Output Sampling Rate .................................................................................................... 68
13.8.12. ADC P/S IF ..................................................................................................................... 69
14. Register Map ................................................................................................................................. 70
15. Register Definitions ....................................................................................................................... 73
15.1. <0x01~0x03>FRAC ............................................................................................................... 73
15.2. <0x04~0x06>MOD ................................................................................................................. 73
15.3. <0x07~0x08>INT.................................................................................................................... 73
15.4. <0x09>RDIV........................................................................................................................... 73
15.5. <0x0A~0x0B>CP.................................................................................................................... 74
15.6. <0x0C>SYNTH ...................................................................................................................... 75
15.7. <0x0D~0x0E>FAST TIME ..................................................................................................... 75
15.8. <0x0F~0x11>FREQ OFFSET1.............................................................................................. 76
15.9. <0x12>LOCAL ....................................................................................................................... 76
15.10. <0x13>TX............................................................................................................................... 76
15.11. <0x14>RX .............................................................................................................................. 77
15.12. <0x15~0x16>PGA GAIN........................................................................................................ 78
15.13. <0x17~0x18>CAL START ..................................................................................................... 79
15.14. <0x19~0x1E>CH_DC OFST.................................................................................................. 80
15.15. <0x1F~0x21, 0x47~048>AGC ............................................................................................... 80
15.16. <0x22>CH FILTER................................................................................................................. 84
15.17. <0x23>PROG FILTER ........................................................................................................... 84
15.18. <0x24~0x25>HPF .................................................................................................................. 85
15.19. <0x26~0x28, 0x44~0x46>RDOC........................................................................................... 86
15.20. <0x29~0x2B>FREQ OFFSET2 ............................................................................................. 88
15.21. <0x2C>RSSI .......................................................................................................................... 88
15.22. <0x2D>FIR COEF .................................................................................................................. 89
15.23. <0x2E>PD .............................................................................................................................. 90
15.24. <0x2F~0x30>READ PGA ...................................................................................................... 90
15.25. <0x31~0x36>READ OFST..................................................................................................... 90
15.26. <0x37~0x39>READ COEF .................................................................................................... 91
15.27. <0x3A>READ RSSI ............................................................................................................... 91
15.28. <0x3B~0x3E>ANA DC OFST ................................................................................................ 91
15.29. <0x3F~0x40>LDCNT ............................................................................................................. 92
15.30. <0x41~0x43>PHASE CAL ..................................................................................................... 92
15.31. <0x49>PRE TESTEN............................................................................................................. 93
15.32. <0x4A>CH FILTER2 .............................................................................................................. 94
15.33. <0x4B>STATUS..................................................................................................................... 94
15.34. <0x5F>SOFT RESET ............................................................................................................ 94
16. Recommended External Circuits................................................................................................... 95
16.1. Recommended External Circuits ........................................................................................... 95
16.2. List of Parts ............................................................................................................................ 95
16.3. Power Supply/Ground Pin...................................................................................................... 96
16.4. PCB Design............................................................................................................................ 97
16.5. PCB Layout ............................................................................................................................ 98
017003093-E-00
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