AS3932 Datasheet, PDF (1/33 Pages) ams AG – 3D Low Frequency Wakeup Receiver

Data Sheet
AS3932
3D Low Frequency Wakeup Receiver
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.
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.
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.
The device is available in 16 pin TSSOP and QFN 4x4 16LD
packages.
2 Key Features
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
Wakeup sensitivity 100 µVRMS (typ.)
Adjustable sensitivity level
Highly resistant to false wakeups
False wakeup counter
Periodical forced wakeup supported (1s – 2h)
Low power listening modes
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
5 bit RSSI step (2dB per step)
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
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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