AS3930 Low Frequency Wakeup Receiver

By ams 101

AS3930 Low Frequency Wakeup Receiver

ams' AS3930 is a single-channel, low power ASK receiver, which is able to generate a wake up 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 wake up 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 wake up generation. The sensitivity level of AS3930 can be adjusted in the presence of a strong field or in noisy environments.

View Diagram

Features and Benefits
  • Current consumption in listening mode 1.37 µA (typ.)
  • Operating supply voltage 2.4 V to 3.6 V (TA = 25°C)
  • Data rate adjustable from 0.5 kbps to 4 kbps (Manchester)
  • RTC based on 32 kHz XTAL, RC-OSC, or external clock
  • Periodical forced wake up supported (1 s to 2 h)
  • Manchester decoding with clock recovery
  • Bidirectional serial digital interface (SDI)
  • Operating temperature range -40°C to +85°C
  • Wake up without pattern detection supported
  • Dynamic range 64 dB
  • Carrier frequency range 110 to 150 kHz
  • Programmable wake up pattern (16-bits)
  • Doubling of wake up pattern supported
  • Single channel ASK wake up receiver
  • Highly resistant to false wake ups
  • 5-bit RSSI step (2 dB per step) RoHS compliant
  • Adjustable sensitivity level
  • Low-power listening modes
  • False wake up counter
  • Digital RSSI
  • Active RFID tags
  • Real-time location systems
  • Operator identification
  • Access control
  • Wireless sensors

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