1. LF Wakeup Receiver

2. Contents. Introduction LF Wakeup Receiver Example Further Works
ATA5283
AS3933
Example
Further Works

3. Introduction Energy save Category SW / HW Passive / Active
Identity(address)/Range

4. ATA5282 Features Three Input Channels for 3D Antennas
2.8 mVPP Sensitivity Typically
Ultra Low Current Operation Consumption
2 μA Standby Current Typically
4 μA Active Current Typically
Power Supply 2 V to 4.2 V
Carrier Frequency Range from 100 kHz to 150 kHz
Wake-up Function for a Microcontroller
Header Detection
Baud Rate up to 4 kbps (ASK Manchester Modulation)
Bi-directional Two-wire Interface
ESD According to Automotive Requirements

5. ATA5282 (Block Diagram)

6. ATA5282 (AGC)

7. ATA5282 (State)

8. ATA5282 (Operation)

9. ATA5282 (Current)

10. AS3933 Key Feature 3-channel ASK wakeup receiver
Carrier frequency range kHz
Programmable wakeup pattern (16-bit or 32-bit)
Wakeup sensitivity 80 µVRMS (typ)
Adjustable sensitivity level
Highly resistant to false wakeups
Self calibration of the internal RC-oscillator
False wakeup counter
Periodical forced wakeup supported (1s – 2h)
3-channel listening mode 1.7 µA (typ)
Data rate adjustable from kbps (Manchester)

11. AS3933 (Block Diagram)

12. AS3933 (Flow chart)

13. AS3933 (Operation)

14. Example

17. Further Works Low power transceiver Auto Poll VS. Standby Mode
TX/RX power < 5mA
Freq. (400MHz, 800~900MHz, 2.4GHz)
Auto Poll VS. Standby Mode