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.

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.