AS3930 查看數據表（PDF） - austriamicrosystems AG

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AS3930

Single Channel Low Frequency Wakeup Receiver

austriamicrosystems AG 

AS3930

Datasheet - Contents

Contents

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

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

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

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

4.1 16-pin TSSOP ...................................................................................................................................................................................... 4

4.1.1 Pin Descriptions........................................................................................................................................................................... 4

4.2 QFN 4x4 16 LD..................................................................................................................................................................................... 5

4.2.1 Pin Descriptions........................................................................................................................................................................... 5

5 Absolute Maximum Ratings ...................................................................................................................................................... 6

6 Electrical Characteristics........................................................................................................................................................... 7

7 Typical Operating Characteristics ............................................................................................................................................. 9

8 Detailed Description................................................................................................................................................................ 10

8.1 Operating Modes ................................................................................................................................................................................ 11

8.1.1 Power Down Mode .................................................................................................................................................................... 11

8.1.2 Listening Mode .......................................................................................................................................................................... 11

8.1.3 Preamble Detection / Pattern Correlation .................................................................................................................................. 11

8.1.4 Data Receiving .......................................................................................................................................................................... 12

8.2 System and Block Specification ......................................................................................................................................................... 12

8.2.1 Main Logic and SDI ................................................................................................................................................................... 12

8.2.2 Serial Data Interface (SDI)......................................................................................................................................................... 14

8.2.3 SDI Timing ................................................................................................................................................................................. 17

8.3 Channel Amplifier and Frequency Detector........................................................................................................................................ 18

8.3.1 Frequency Detector / AGC ........................................................................................................................................................ 18

8.3.2 Antenna Damper........................................................................................................................................................................ 19

8.4 Demodulator / Data Slicer .................................................................................................................................................................. 19

8.5 Correlator............................................................................................................................................................................................ 20

8.6 Wake-up Protocol - Carrier Frequency 125 kHz................................................................................................................................. 22

8.6.1 Without Pattern Detection.......................................................................................................................................................... 22

8.6.2 Single Pattern Detection ............................................................................................................................................................ 23

8.7 False Wake-up Register ..................................................................................................................................................................... 24

8.8 Real Time Clock (RTC)....................................................................................................................................................................... 25

8.8.1 Crystal Oscillator........................................................................................................................................................................ 26

8.8.2 RC-Oscillator ............................................................................................................................................................................. 26

8.8.3 External Clock Source ............................................................................................................................................................... 27

9 Package Drawings and Markings ........................................................................................................................................... 28

10 Ordering Information............................................................................................................................................................. 31

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