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.