AS3933 EB austriamicros stems a feap ahead in analo athe 1 Bl Gaia 3D Low Frequency Wakeup Receiver 1 General Description The AS3933 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 camier frequency between 15-150 kHz. The integrated correlatorcan be used for detection of a programmable 16-bit or 32-bit Manchester wakeup pattern. The dewice can operate using one, two, or three active channels The AS3933 provides a digital RSS| value for each active channel, t supporls a programmable data rate and Manchester decoding with clock recovery. The AS3933 offers an internal Glock Generator, which ig either derwed fram a crystal oscillator or the internal RG oscillator. The user can decide to use the external clock generator instead. The programmable features of ASG933 enable to optimize its settings for achieving a longer distance while retaining a reliable wakeup generation. The sensitivity level of ASS933 can be adjusted in presence of a strong fleld or in noisy environ ments Antenna tuning is greatly simplified, as the automatic tuning feature ensures perfect matching to the desired carner frequency. The device is available in 16 pin TSSOP and QFN 4x4 16LD packages ho Key Features gm 3channel ASK wakeup receiver m Carrier frequency range 15 - 150 kHz m One, two, or three channel operation m Reliable 1-, 2 or 3-D wakeup pattem detection m Programmable wakeup pattern (16-bit or 32-bit] Manchester = Doubling of wakeup pattern supported (both for 16 and 32 bits) m Wakeup without pattern detection supported whinicaustram crosystems.com/LF-ReceweriAS3933 m Wakeup sensitivity 80 UYRMS typ) = Adjustable sensitivity level m Highly resistant to false wakeups m Easy antenna tuning for perfect matching on the wanted carrier frequency = Self calibration of the internal RC-oscillator m False wakeup counter = Periodical forced wakeup supported (1s - 2h} m Low power listening modes m Current consumption in 3-channel listening mode 1.7 LA typ) m Data rate adjustable from 0.5-4 kbps (Manchester) m Manchester decoding with clock recovery a Digital RSS! values available for each channel m Dynamic range 64 dB m Obit RSS| step 2dB per step) m Clock Generator based on 32kH2 XTAL, RG-OSC, or External Glock m Operating temperature range -4f to +88C m Operating supply voltage 2.4 - 3.6 (TA =26C) = Bidirectional serial peripheral interface (SPI) m Package option: 16 pin TSSOP, QFN 4x4 46LD nw Applications The ASS933 ts Ideal for Active RFID tags, Realtime location systems, Operator identification, Access control, and Wireless sensors Revision 1.0 1-43