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AS3932
3 D L o w F r e q u e n c y Wa k e u p R e c e i v e r
1 General Description
The AS3932 is a 3-channel low power ASK receiver that is able to
generate a wake-up 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 wake-up 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. 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
wake-up 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 16LD QFN (4x4)
packages.
2 Key Features
?? 3-channel ASK wake-up receiver
?? Carrier frequency range 110 - 150 kHz
?? One, two, or three channel operation
?? Reliable 1-D, 2-D or 3-D wake-up pattern detection
?? Programmable wake-up pattern (16bits)
?? Doubling of wake-up pattern supported
?? Wake-up without pattern detection supported
?? Wake-up sensitivity 100 μVRMS (typ.)
?? Adjustable sensitivity level
?? Highly resistant to false wake-ups
?? False wake-up counter
?? Periodical forced wake-up supported (1s – 2h)
?? Low power listening modes
?? Current consumption in 3-channel listening mode 1.7 μA (typ.)
?? Programmable data-rate 0.5 – 4 kbaud (Manchester encoded)
?? 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 -40oC to +85oC
?? Operating supply voltage 2.4V – 3.6V (TA = 25oC)
?? Bidirectional serial digital interface (SDI)
?? Package option: 16-pin TSSOP, 16LD QFN (4x4)
3 Applications
The AS3932 is ideal for Active RFID tags, Real-time location
systems, Operator identification, Access control, and Wireless
sensors.
www.ams.com/LF-Receiver/AS3932
Revision 1.7
1 - 34
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