The IC is a low power ASK/FSK Receiver for the frequency bands 300-320, 425-450, 863-870 and 902-928 MHz. Bi-phase modulation schemes, like Manchester, bi-phase mark, bi-phase space and differential Manchester are supported.
The chip offers best-in-class sensitivity performance at a very high level of integration and needs only a few external components.
The device is qualified to automotive quality standards and operates between -40 and
+105°C at supply voltage ranges of 3.0-3.6 Volts or 4.5-5.5 Volts.
The receiver is realized as a double down conversion super-heterodyne/low-IF architecture each with image rejection supplemented by digital signal processing in the baseband. A fully integrated Sigma-Delta Fractional-N PLL Synthesizer allows for high- resolution frequency generation and uses a crystal oscillator as the reference. The on- chip temperature sensor may be utilized for temperature drift compensation via the crystal oscillator.
Features :
- Enhanced sensitivity receiver
- Multi-band/Multi-Channel (300-320, 425-450, 863-870 and 902-928 MHz)
- One crystal frequency for all supported frequency bands
- 21-bit Sigma-Delta Fractional-N PLL synthesizer with high resolution of 10.5 Hz
- Up to 4 parallel parameter sets for autonomous scanning and receiving from different sources reduces significantly host processor power consumption and system standby power consumption
- Up to 12 different frequency channels are supported with 10.5 Hz resolution each
- Autonomous receive mode leads to reduced noise of host processor and improved system performance
- Ultrafast Wake-up on RSSI
- Fast synchronization on incoming data stream typically within first 4 bits of a telegram
- Selectable IF filter bandwidth and optional external filters possible
- Double down conversion image reject mixer
- ASK and FSK capability
- Automatic Frequency Control (AFC) for carrier frequency offset compensation
- Supports bi-phase line codes like Manchester, bi-phase mark/space and differential Manchester
- NRZ data pre-processing capability
- Digital base band receiver with clock synch, frame synch, format decoding and FIFO
- Separate outputs for recovered data and clock
- RSSI peak detectors
- Wake-up generator and polling timer unit
- Message ID scanning
- Unique 32-bit serial number
- On-chip temperature sensor
- Integrated timer usable for external watch unit
- Integrated 4-wire SPI interface bus
- Supply voltage range 3.0 Volts to 3.6 Volts or 4.5 Volts to 5.5 Volts
- Operating temperature range -40 to +105°C
- ESD protection +/- 2 kV on all pins
- Package PG-TSSOP-28
Applications :
- Remote keyless entry systems
- Remote start applications
- Tire pressure monitoring
- Short range radio data transmission
- Remote control units
- Cordless alarm systems
- Remote metering