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AS3930

Data Sheet - C o n t e n t s

Contents

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

2 Key Features ............................................................................................................................................................................... 1

3 Applications ................................................................................................................................................................................ 1

4 Pin Assignments......................................................................................................................................................................... 5

4.1 TSSOP Package ...................................................................................................................................................................................... 5

4.1.1 Pin Descriptions............................................................................................................................................................................ 5

4.2 QFN Package........................................................................................................................................................................................... 6

4.2.1 Pin Descriptions............................................................................................................................................................................ 6

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

6 Electrical Characteristics........................................................................................................................................................... 8

7 Typical Operating Characteristics........................................................................................................................................... 10

8 Detailed Description ..................................................................................................................................................................11

8.1 Block Diagram ........................................................................................................................................................................................ 11

8.2 Operating modes.................................................................................................................................................................................... 12

8.2.1 Power Down Mode ..................................................................................................................................................................... 12

8.2.2 Listening Mode ........................................................................................................................................................................... 12

8.2.3 Preamble Detection / Pattern Correlation ................................................................................................................................... 12

8.2.4 Data Receiving ........................................................................................................................................................................... 13

8.3 System and Block Specification ............................................................................................................................................................. 13

8.3.1 Main Logic and SDI .................................................................................................................................................................... 13

8.4 Channel Amplifier and Frequency Detector............................................................................................................................................ 18

8.4.1 Frequency Detector / AGC ......................................................................................................................................................... 18

8.4.2 Antenna Damper......................................................................................................................................................................... 19

8.5 Demodulator / Data Slicer ...................................................................................................................................................................... 19

8.6 Correlator................................................................................................................................................................................................ 20

8.7 Wakeup Protocol - Carrier Frequency 125 kHz...................................................................................................................................... 23

8.7.1 Without pattern detection (Manchester decoder disabled) ......................................................................................................... 23

8.7.2 Single Pattern Detection (Manchester decoder disabled) .......................................................................................................... 23

8.7.3 Single Pattern Detection (Manchester decoder enabled) ........................................................................................................... 25

8.8 False Wakeup Register .......................................................................................................................................................................... 25

8.9 Real Time Clock (RTC)........................................................................................................................................................................... 26

8.9.1 Crystal Oscillator......................................................................................................................................................................... 27

8.9.2 RC-Oscillator .............................................................................................................................................................................. 27

8.9.3 External Clock Source ................................................................................................................................................................ 27

9 Package Drawings and Markings............................................................................................................................................ 29

10 Ordering Information.............................................................................................................................................................. 33