Specifications

Document Number: 002-29172 Rev. ** Page 15 of 45
PRELIMINARY
CYBT-223058-02
CYBT-253059-02
Integrated Radio Transceiver
The CYBT-2x305x-02 has an integrated radio transceiver that has been designed to provide low power operation in the globally
available 2.4 GHz unlicensed ISM band.
Transmitter Path
CYBT-2x305x-02 features a fully integrated transmitter. The baseband transmit data is GFSK modulated in the 2.4 GHz ISM band.
Digital Modulator
The digital modulator performs the data modulation and filtering required for the GFSK signal. The fully digital modulator minimizes
any frequency drift or anomalies in the modulation characteristics of the transmitted signal.
Power Amplifier
The CYBT-2x305x-02 has an integrated power amplifier (PA) that can transmit up to +10.5 dBm for class 1 operation.
Receiver Path
The receiver path uses a low IF scheme to downconvert the received signal for demodulation in the digital demodulator and bit
synchronizer. The receiver path provides a high degree of linearity, and an extended dynamic range to ensure reliable operation in
the noisy 2.4 GHz ISM band. The front-end topology, which has built-in out-of-band attenuation, enables the CYBT-2x305x-02 to be
used in most applications without off-chip filtering.
Digital Demodulator and Bit Synchronizer
The digital demodulator and bit synchronizer take the low-IF received signal and perform an optimal frequency tracking and bit
synchronization algorithm.
Receiver Signal Strength Indicator
The radio portion of the CYBT-2x305x-02 provides a receiver signal strength indicator (RSSI) to the baseband. This enables the
controller to take part in a Bluetooth power-controlled link by providing a metric of its own receiver signal strength to determine whether
the transmitter should increase or decrease its output power.
Local Oscillator
The local oscillator (LO) provides fast frequency hopping (1600 hops/second) across the band. The CYBT-2x305x-02 uses an internal
loop filter.