NRF902

PRELIMINARY PRODUCT SPECIFICATION Single chip 868 MHz Transmitter FEATURES • • • • • nRF902 APPLICATIONS • • • • • • • • • • • • • • True single chip FSK/ASK transmitter in a small 8-pin package Adjustable output power up to +10dBm FSK data rate up to 50kbits/s Very few external components On-chip frequency synthesiser gives improved frequency stability compared to SAW solutions Wide power supply range: 2.4 to 3.6 V Low supply current, typical 9mA @ -10dBm output power Power Down and Clock modes makes power saving easy Reference Clock output pin for microcontroller Automatic Meter Reading Keyless entry Wireless data communication Alarm and security systems Home Automation Remote control Surveillance Automotive Telemetry Toys GENERAL DESCRIPTION nRF902 is a single-chip transmitter for the 868 MHz ISM band, designed to comply with the ETSI specification I-ETS 300 220. Using nRF902 both FSK and ASK modulation is possible. The transmitter consists of a fully integrated frequency synthesiser, a power amplifier, a crystal oscillator and a modulator. Few external components are required: a 13.567 MHz crystal, two resistors and some decoupling capacitors. Due to the use of the crystal-oscillator stabilised frequency synthesiser, frequency drift is much lower than in comparable SAW-resonator based solutions. Output power is easily programmable by use of an external resistor. Current consumption is very low, only 9 mA at an output power of –10dBm. Built-in Clock and Power Down modes makes power saving and duty-cycling easily realisable. QUICK REFERENCE DATA Parameter Minimum supply voltage Maximum output power Maximum FSK data rate Maximum ASK data rate Supply current FSK transmitter @ -10dBm output power Supply current in Clock mode Supply current in Power Down mode Value 2.4 10 50 10 9 200