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AS3930 Low Frequency Wakeup Receiver


austriamicrosystems' high performance, single-channel 125kHz wakeup receiver requires minimal external components


austriamicrosystems - AS3930 Low Frequency Wakeup Receiveraustriamicrosystems' AS3930 is a single-channel, low power ASK receiver, which is able to generate a wakeup upon detection of a data signal that uses an LF carrier frequency between 110 and 150 kHz. The integrated correlator can be used for detection of a programmable 16-bit wakeup pattern.

The AS3930 provides a digital RSSI value, and it supports a programmable data rate and Manchester decoding with clock recovery. The AS3930 offers a real-time clock (RTC), which is derived from either a crystal oscillator or the internal RC oscillator.

The programmable features of AS3930 enable the optimization of its settings for achieving a longer distance while retaining a reliable wakeup generation. The sensitivity level of AS3930 can be adjusted in the presence of a strong field or in noisy environments.

  • Features
  • Applications
  • Diagram
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Features

  • Current consumption in listening mode 1.37µA (typ.)
  • Operating supply voltage 2.4 - 3.6V (TA = 25°C)
  • Data rate adjustable from 0.5 - 4 kbps (Manchester)
  • RTC based on 32kHz XTAL, RC-OSC, or external clock
  • Periodical forced wakeup supported (1s – 2h)
  • Manchester decoding with clock recovery
  • Bidirectional serial digital interface (SDI)
  • Operating temperature range -40 to +85°C
  • Wakeup without pattern detection supported
  • Wakeup sensitivity 100 µVRMS (typ.)
  • Carrier frequency range 110 - 150 kHz
  • Programmable wakeup pattern (16 bits)
  • Doubling of wakeup pattern supported
  • Single channel ASK wakeup receiver
  • Highly resistant to false wakeups
  • 5-bit RSSI step (2dB per step) RoHS Compliant
  • Adjustable sensitivity level
  • Low-power listening modes
  • False wakeup counter
  • Dynamic range 64dB
  • Digital RSSI

Applications

  • Active RFID tags
  • Real-time location systems
  • Operator identification
  • Access control
  • Wireless sensors

Diagram

AS3930 Diagram

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Digi-Key P/N austriamicrosystems P/N Description Datasheet
AS3930-BQFTCT-ND AS3930-BQFT IC RF PROGRAM RECIEVER 16-QFN Datasheet
 Available in Tape & Reel (TR-ND), Cut Tape (CT-ND), and custom Digi-Reel® (DKR-ND)