AS3932 LF RECEIVER IC
Programmable 3D LF Wake-up Receiver
The AS3932 is a 3-channel ASK receiver that generates a wake-up signal upon detection of a data signal with a carrier frequency in the range of 110 – 150 kHz. It can be used to wake-up active tags in RTLS, PKE and other similar tracking and access control systems.
The integrated correlator can be used for detection of a programmable 16-bit wake-up pattern. The device can operate using one, two, or three active channels.
The AS3932 calculates a digital RSSI value for each active channel and has a customizable data rate. The AS3932 includes a real-time clock (RTC) that is produced from either a crystal oscillator or the internal RC oscillator. AS3932’s configurable capabilities allow you to optimize its settings for a greater distance while maintaining dependable wake-up generation.
The sensitivity level of AS3932 can be adjusted in presence of a strong field or in noisy environments.
KEY FEATURES
- Programmable wake-up pattern
- 100µV wake-up sensivity
- Low power listening mode (1.7µA)
- One, two or three channel operation
KEY BENEFITS
- Eliminates false wake-up
- Provides long range wake-up
- Enables long battery life
- Works with 3D antenna
AS3932 APPLICATIONS
- IoT Devices & Smart Thermostats
- Real-Time Location Systems (RTLS)
- High-Value Asset Tracking
- Container Tracking
- Operator Identification
- Passive Keyless Entry (PKE)
- Wireless Sensors
Products
AS3932 PRODUCT FACTS
| Channels [#] | 3 |
| Wake-up sensitivity [µVpp] | 282 |
| LF carrier freq. range [kHz] | 110-150 |
| Data rate (manch.) [kb/s] | 0.5 – 4 |
| Dynamic range [dB] | 64 |
| RSSI step [dB] | 2 |
| Package | TSSOP-16, QFN-16 |
| Features | 16bit programmable wake-up pattern |
| Supply voltage [V] | 2.4 – 3.6 |
| Current Consumption [(PD/Listening/Active) µA] | 0.4/2.7/8.3 |
| Temperature range [°C] | -40 to +85 |
| Interface | Serial Peripheral Interface |
Documentation & Downloads
AS3932 Downloads
AS3932 Demo Board
The AS3932 demo board demonstrates the main features of the AS3932. These include 3D wake-up pattern detection, readout of false wake-ups, possibility to measure current consumption in different operating modes, and measurement access to SPI communication and data output. The influence different settings have on the detection efficiency can be observed right away by using the 125 kHz wake-up transmitter board.