The **CC2500-RTY1** is a low-cost, highly integrated 2.4 GHz RF transceiver designed for very low-power wireless applications. It is part of Texas Instruments' (TI) family of radio devices intended for the 2400–2483.5 MHz ISM (Industrial, Scientific, and Medical) band. --- ## 1. Technical Specifications The following table highlights the primary electrical and performance characteristics of the CC2500-RTY1: | Feature | Specification | | :--- | :--- | | **Frequency Range** | 2400 MHz to 2483.5 MHz | | **Data Rate** | 1.2 to 500 kBaud | | **Supply Voltage** | 1.8V to 3.6V | | **Current Consumption (RX)** | 13.3 mA (at 250 kBaud) | | **Current Consumption (TX)** | 21.2 mA (at 0 dBm output) | | **Output Power** | Programmable up to +1 dBm | | **Sensitivity** | -104 dBm at 2.4 kBaud | | **Interface** | SPI (Serial Peripheral Interface) | | **Package** | QFN-20 (4x4 mm) | --- ## 2. Key Internal Components The CC2500 is a "Radio-on-a-Chip." Its internal architecture consists of several critical electronic sections: ### A. RF Front-End * **Low Noise Amplifier (LNA):** Boosts the weak incoming signal from the antenna. * **Power Amplifier (PA):** Amplifies the signal before it is sent to the antenna for transmission. * **Mixer:** Down-converts the RF signal to an Intermediate Frequency (IF). ### B. Modem Section * **Modulation Support:** It supports **2-FSK, GFSK, and MSK** modulation formats. * **Demodulator:** Extracts the digital data from the received analog radio wave. ### C. Digital Controller * **Packet Handling:** Includes hardware support for packet handling, address filtering, and Cyclic Redundancy Check (CRC). * **FIFO Buffers:** Separate 64-byte RX and TX FIFOs to handle data flow between the MCU and the radio. --- ## 3. Peripheral Circuit Requirements To function correctly, the CC2500-RTY1 requires several external electronic parts: 1. **Crystal Oscillator:** Typically a 26 MHz crystal is required for the frequency synthesizer and internal clocking. 2. **Balun and Matching Network:** A combination of inductors and capacitors (LC circuit) to transform the differential output of the chip to a 50-ohm single-ended antenna connection. 3. **Decoupling Capacitors:** Small capacitors (e.g., 100nF, 10pF) placed close to the VDD pins to filter power supply noise. --- ## 4. Typical Applications * Wireless game controllers * Wireless keyboard and mouse (HID) * Consumer electronics (Remote controls) * Low-power telemetry and home automation ---