NFC Analog Specification
Technical Specification
NFC Forum
TM
ANALOG 1.0
NFCForum-TS-Analog-1.0
2012-07-11
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Contents
NFC Analog Specification Page i
Contents
1 Introduction .................................................................................................... 6
1.1 Objectives ...................................................................................................................... 6
1.2 Purpose .......................................................................................................................... 6
1.3 Applicable Documents or References ........................................................................... 6
1.4 Administration ............................................................................................................... 7
1.5 Name and Logo Usage .................................................................................................. 8
1.6 Intellectual Property ...................................................................................................... 8
1.7 Special Word Usage ...................................................................................................... 8
1.8 Requirement Numbering ............................................................................................... 9
1.9 Notational Conventions ................................................................................................. 9
1.10 Abbreviations ................................................................................................................ 9
1.11 Glossary ....................................................................................................................... 10
2 Overview ...................................................................................................... 15
2.1 NFC Forum Devices .................................................................................................... 15
2.2 NFC Forum Reference Equipment .............................................................................. 16
2.3 Positioning Convention ............................................................................................... 17
2.4 Operating Volume ....................................................................................................... 17
3 Principles (Informative) ............................................................................... 19
3.1 General ........................................................................................................................ 19
3.2 Configurations for Transmission and Reception ......................................................... 19
3.3 The Purpose of the NFC Forum Reference Equipment ............................................... 19
3.4 Using the Reference Equipment .................................................................................. 21
3.5 Functions Properly....................................................................................................... 21
3.6 Summary ..................................................................................................................... 22
4 Radio Frequency Power and Signal Interface ........................................... 23
4.1 Polling Device Requirements for Power Transfer from Polling Device to Listening
Device .......................................................................................................................... 23
4.2 Listening Device Requirements for Power Transfer from Polling Device to Listening
Device .......................................................................................................................... 24
4.3 Influence of the Listening Device on the Operating Field .......................................... 25
4.4 Polling Device Requirements for the Carrier Frequency f
C
........................................ 26
4.5 Listening Device Requirements for the Carrier Frequency f
C
..................................... 27
4.6 Listening Device Requirements for Power-On ........................................................... 27
4.7 Polling Device Requirements for Resetting Listening Devices .................................. 28
4.8 Listening Device Requirements for being Reset ......................................................... 29
4.9 Polling Device Requirements for RF Collision Avoidance ......................................... 30
5 Signal Interface Polling Device to Listening Device ................................. 32
5.1 Polling Device Requirements for Modulation Polling Device to Listening Device –
NFC-A ......................................................................................................................... 32
5.2 Listening Device Requirements for Modulation Polling Device to Listening Device –
NFC-A ......................................................................................................................... 35
5.3 Polling Device Requirements for Modulation Polling Device to Listening Device –
NFC-B ......................................................................................................................... 36
5.4 Listening Device Requirements for Modulation Polling Device to Listening Device –
NFC-B ......................................................................................................................... 38
Figures
NFC Analog Specification Page ii
5.5 Polling Device Requirements for Modulation Polling Device to Listening Device –
NFC-F .......................................................................................................................... 40
5.6 Listening Device Requirements for Modulation Polling Device to Listening Device –
NFC-F .......................................................................................................................... 42
6 Signal Interface Listening Device to Polling Device ................................. 44
6.1 Listening Device Requirements for Load Modulation Generic .................................. 45
6.2 Listening Device Requirements for Subcarrier Load Modulation NFC-A.................. 46
6.3 Listening Device Requirements for Subcarrier Load Modulation NFC-B .................. 47
6.4 Listening Device Requirements for Load Modulation NFC-F .................................... 48
6.5 Polling Device Requirements for Load Modulation Listening Device to Polling Device
..................................................................................................................................... 48
A. Exhibit A ....................................................................................................... 50
B. Appendix Values .......................................................................................... 51
B.1 Operating Volume ....................................................................................................... 51
B.2 RF Power and Signal Interface .................................................................................... 51
B.3 Set-up Values for NFC Forum Reference Equipment ................................................. 56
B.4 Calibration Procedure for NFC Forum Reference Pollers ........................................... 62
B.5 Calibration Procedure for NFC Forum Reference Listeners ....................................... 63
B.6 Nominal Settings for NFC Forum Reference Equipment............................................ 65
B.7 Orientation and Alignment of NFC Forum Reference Equipment .............................. 66
C. Design Information for NFC Forum Reference Equipment ...................... 67
C.1 NFC Forum - Reference Polling Device Poller-0 ....................................................... 67
C.2 NFC Forum - Reference Polling Device Poller-3 ....................................................... 68
C.3 NFC Forum - Reference Polling Device Poller-6 ....................................................... 69
C.4 NFC Forum - Reference Listening Device Listener-1 ................................................ 70
C.5 NFC Forum - Reference Listening Device Listener-3 ................................................ 71
C.6 NFC Forum - Reference Listening Device Listener-6 ................................................ 72
C.7 Mechanical Dimensions .............................................................................................. 73
C.8 PCB Construction ........................................................................................................ 80
D. 8-Shaped Coil ............................................................................................... 83
E. Information About Alternative Method for Measuring V
OV
levels for Use
During Large Ambient Temperature Variations ........................................ 84
E.1 New V
OV
Monitor Circuit Description ........................................................................ 84
E.2 Alternative V
OV
Measurement Procedure .................................................................... 86
F. Revision History .......................................................................................... 87
Figures
Figure 1: Polling Device and Listening Device Configuration ..................................................... 15
Figure 2: NFC Forum - Reference Polling Devices ...................................................................... 16
Figure 3: NFC Forum - Reference Listening Devices ................................................................... 17
Figure 4: Operating Volume .......................................................................................................... 18
Figure 5: NFC Forum Reference Equipment Generic Configuration ........................................... 21
Figures
NFC Analog Specification Page iii
Figure 6: Modulation Polling Device to Listening Device for NFC-A ......................................... 34
Figure 7: Modulation Polling Device to Listening Device for NFC-B ......................................... 38
Figure 8: Modulation Polling Device to Listening Device for NFC-F .......................................... 42
Figure 9: Load Modulation Listening Device to Polling Device .................................................. 44
Figure 10: Start of Subcarrier Modulation – NFC-A .................................................................... 47
Figure 11: Allowed Phase Shifts – NFC-B ................................................................................... 48
Figure 12: Calibration Plane of SMA Plug and Socket ................................................................. 62
Figure 13: Example of VNA Display When Tuning a Reference Poller ...................................... 63
Figure 14: Example of VNA Display When Tuning a Reference Listener ................................... 64
Figure 15: Orientation of NFC Forum Reference Equipment Used To Characterise a Polling or
Listening Device ............................................................................................................................ 66
Figure 16: Relative Orientation of NFC Forum Reference Equipment During Set-up ................. 66
Figure 17: Circuit for NFC Forum - Reference Device Poller-0 ................................................... 67
Figure 18: PCB Layout for Poller-0 .............................................................................................. 67
Figure 19: Circuit for NFC Forum - Reference Device Poller-3 ................................................... 68
Figure 20: PCB Layout for Poller-3 .............................................................................................. 68
Figure 21: Circuit for NFC Forum - Reference Device Poller-6 ................................................... 69
Figure 22: PCB Layout for Poller-6 .............................................................................................. 69
Figure 23: Circuit for NFC Forum - Reference Device Listener-1 ............................................... 70
Figure 24: PCB Layout for Listener-1 ........................................................................................... 70
Figure 25: Circuit for NFC Forum - Reference Device Listener-3 ............................................... 71
Figure 26: PCB Layout for Listener-3 ........................................................................................... 71
Figure 27: Circuit for NFC Forum - Reference Device Listener-6 ............................................... 72
Figure 28: PCB Layout for Listener-6 ........................................................................................... 72
Figure 29: Poller-0 Top Layer ....................................................................................................... 73
Figure 30: Poller-0 Mid Layer 1 .................................................................................................... 73
Figure 31: Poller-0 Mid Layer 2 .................................................................................................... 74
Figure 32: Poller-0 Bottom Layer ................................................................................................. 74
Figure 33: Poller-3 Top Layer ....................................................................................................... 75
Figure 34: Poller-3 Mid Layer 1 .................................................................................................... 75
Figure 35: Poller-3 Mid Layer 2 .................................................................................................... 75
Figure 36: Poller-3 Bottom Layer ................................................................................................. 76
Figure 37: Poller-6 Top Layer ....................................................................................................... 76
Figure 38: Poller-6 Mid Layer 1 .................................................................................................... 76
Figure 39: Poller-6 Mid Layer 2 .................................................................................................... 77
