FSK receiver chip - RF01

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Datasheet:

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DESCRIPTION:

Hope's RF01 is a single chip, low power, multi-channel FSK receiver designed for use in applications requiring FCC or ETSI conformance for unlicensed use in the bands at 315, 433, 868 and 915 MHz. Used in conjunction with RF02-Hope's FSK transmitter, the RF01 is a flexible, low cost and highly integrated solution that does not require production alignments. All required RF functions are integrated. Only an external crystal and bypass filtering are needed for operation.

The RF01 has a completely integrated PLL for easy RF design, and its rapid settling time allows for fast frequency-hopping, bypassing multi path fading and interference to achieve robust wireless links. The PLL's high resolution allows the usage of multiple channels in any of the bands.The base-band bandwidth (BW) is programmable to accommodate various deviation, data rate and crystal tolerance requirements. The receiver employs the Zero-IF approach with I/Q demodulation, this way no external components (except crystal and decoupling) are needed in a typical application. The RF01 is a complete analog RF and base-band receiver including a multi-band PLL synthesizer with an LNA, I/Q down converter mixers, base-band filters and amplifiers, I/Q demodulator.

The chip dramatically reduces the load on the micro controller with the integrated digital data processing: data filtering, clock recovery, data pattern recognition and integrated FIFO. The automatic frequency control (AFC) feature allows using a low accuracy (low cost) crystal. To minimize the system cost, the chip can provide a clock signal for the micro controller, avoiding the need for two crystals.

For simplest applications the receiver supports a standalone operation mode. This allows complete data receiver operation and control of four digital outputs based on the incoming data pattern without a micro controller. In this mode at least dozen predefined frequency channels can be used in any of the four bands. For low power applications the device supports low duty cycle operation based on the internal wake-up timer.

FEATURES:

Fully integrated (low BOM, easy design-in)
No alignment required in production
Fast-settling, programmable, high-resolution PLL synthesizer
Fast frequency-hopping capability
High bit rate (up to 115.2kbps in digital mode)
Direct differential antenna input
Programmable base-band bandwidth (67 to 400 kHz)
Analog and digital RSSI outputs
Automatic frequency control (AFC)
Data quality detection (DQD)
Internal data filtering and clock recovery
RX pattern recognition
SPI compatible serial control interface
Clock and reset signals for microcontroller
16 bit RX Data FIFO
Low power duty cycle mode (less than 0.5 mA average supply current)
Standard 10 MHz crystal reference
Alternative OOK support
Wake-up timer
Low battery detector
2.2 to 5.4 V supply voltage
Low power consumption (~9 mA in low bands)
Low standby current (0.3µA)
Compact 16-pin TSSOP package

TYPICAL APPLICATIONS

Remote control
Home security and alarm
Wireless keyboard/mouse and other PC peripherals
Toy controls
Remote keyless entry
Tire pressure monitoring
Telemetry
Personal/patient data logging
Remote automatic meter reading

Programming Guide

RF01 programming guide