Data Sheet
AS3932
3D Low Frequency Wakeup Receiver
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Wakeup sensitivity 100 µVRMS (typ.)
Adjustable sensitivity level
1 General Description
The AS3932 is a 3-channel low power ASK receiver that is able to
generate a wakeup upon detection of a data signal which uses a LF
carrier frequency between 110 - 150 kHz. The integrated correlator
can be used for detection of a programmable 16-bit wakeup pattern.
The device can operate using one, two, or three active channels.
Highly resistant to false wakeups
False wakeup counter
Periodical forced wakeup supported (1s – 2h)
Low power listening modes
The AS3932 provides a digital RSSI value for each active channel, it
supports a programmable data rate and Manchester decoding with
clock recovery. The AS3932 offers a real-time clock (RTC), which is
either derived from a crystal oscillator or the internal RC oscillator.
Current consumption in 3-channel listening mode 1.7 µA (typ.)
Data rate adjustable from 0.5- 4 kbps (Manchester)
Manchester decoding with clock recovery
Digital RSSI values available for each channel
Dynamic range 64dB
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 noisy environments.
5 bit RSSI step (2dB per step)
The device is available in 16 pin TSSOP and QFN 4x4 16LD
packages.
RTC based on 32kHz XTAL, RC-OSC, or External Clock
Operating temperature range -40 to +85ºC
Operating supply voltage 2.4 - 3.6V (TA = 25ºC)
Bidirectional serial digital interface (SDI)
Package option 16 pin TSSOP, QFN 4x4 16LD
2 Key Features
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3-channel ASK wakeup receiver
Carrier frequency range 110 - 150 kHz
One, two, or three channel operation
Reliable 1-, 2- or 3-D wakeup pattern detection
Programmable wakeup pattern (16bits)
Doubling of wakeup pattern supported
Wakeup without pattern detection supported
3 Applications
The AS3932 is ideal for Active RFID tags, Real-time location
systems, Operator identification, Access control, and Wireless
sensors.
www.austriamicrosystems.com/AS3932
Revision 1.2
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