austriamicrosystems

AS3932 Low Frequency IC

Programmable 3D Low Power LF Wakeup Receiver

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Description

The AS3932 is an ultra low power 3-axis ASK wakeup and data receiver that is able to generate a wakeup upon detection of an OOK modulated data signal which uses a low frequency carrier. The integrated correlator is available for analysis of the programmable wakeup pattern. The device can operate using one, two or three active channels.

AS3932 provides a digital RSSI value for each active channel, it supports a programmable data rate and Manchester decoding with clock recovery. AS3932 offers a fully integrated clock generator, which is either derived from a crystal oscillator or the internal RC oscillator.

The programmable features of AS3932 enable to optimize its settings for achieving a longer distance while retaining a reliable wakeup generation. The sensitivity level of AS3932 can be adjusted in presence of a strong field or in a noisy environment.

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Key Features

  • 3-channel ASK wakeup receiver
  • Continuous data reception supported
  • Low power listening modes
  • High sensitivity at very low current consumption
  • One, two or three channel operation
  • Programmable wakeup pattern (16bits)
  • Single/double wakeup pattern detection
  • Wakeup without pattern detection supported
  • Adjustable sensitivity level
  • False wakeup counter
  • Periodical forced wakeup (1s – 2h)
  • Data rate adjustable from 0.5 - 4 kbps (Manchester)
  • Manchester decoding with clock recovery
  • Real-time monitoring of digital RSSI for each channel
  • Power down mode
  • clock generator based on XTAL or internal RC-OSC

Main characteristics

  • Carrier frequency range 110 - 150 kHz
  • Wakeup sensitivity 100 µVRMS (typ.)
  • 3-channel listening: 1.7 µA (typ.) (on/off mode)
  • 5 bit RSSI (dynamic range 64dB)
  • Operating temperature range -40 to +85°C
  • Operating supply voltage 2.4 - 3.6V (TA = 25°C)
  • Bidirectional serial digital interface (SDI)
  • Package option QFN16 (4x4), TSSOP16

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Applications

  • Real-time location systems
  • High-value asset tracking
  • Container tracking
  • Operator identification
  • Access control
  • Wireless sensors
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Block diagram for AS3932 Low Frequency IC

Print Block diagram for AS3932 Low Frequency IC
AS3932 Programmable 3D Low Power LF Wakeup Receiver Block Diagram

AS3932 Programmable 3D Low Power LF Wakeup Receiver Block Diagram