AS3932 Low Frequency IC
Programmable 3D Low Power LF Wakeup Receiver
Description
The AS3932 is an ultra low power 3-axis ASK wakeup and data receiver that is able to generate a wakeup upon detection of an OOK modulated data signal which uses a low frequency carrier. The integrated correlator is available for analysis of the programmable wakeup pattern. The device can operate using one, two or three active channels.
AS3932 provides a digital RSSI value for each active channel, it supports a programmable data rate and Manchester decoding with clock recovery. AS3932 offers a fully integrated 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 wakeup generation. The sensitivity level of AS3932 can be adjusted in presence of a strong field or in a noisy environment.
Key Features
- 3-channel ASK wakeup receiver
- Continuous data reception supported
- Low power listening modes
- High sensitivity at very low current consumption
- One, two or three channel operation
- Programmable wakeup pattern (16bits)
- Single/double wakeup pattern detection
- Wakeup without pattern detection supported
- Adjustable sensitivity level
- False wakeup counter
- Periodical forced wakeup (1s – 2h)
- Data rate adjustable from 0.5 - 4 kbps (Manchester)
- Manchester decoding with clock recovery
- Real-time monitoring of digital RSSI for each channel
- Power down mode
- RTC based on XTAL or internal RC-OSC
Main characteristics
- Carrier frequency range 110 - 150 kHz
- Wakeup sensitivity 100 µVRMS (typ.)
- 3-channel listening: 1.7 µA (typ.) (on/off mode)
- 5 bit RSSI (dynamic range 64dB)
- Operating temperature range -40 to +85°C
- Operating supply voltage 2.4 - 3.6V (TA = 25°C)
- Bidirectional serial digital interface (SDI)
- Package option QFN16 (4x4), TSSOP16
Applications
- Real-time location systems
- High-value asset tracking
- Container tracking
- Operator identification
- Access control
- Wireless sensors
