AS393M

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.

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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

Applications

The AS3932 is ideal for Active RFID tags, Real-time location systems, Operator identification, Access control, and Wireless sensors.