User Manual GSRMI24-1 1. Operating description The EM198850AW IC is a low-cost, fully integrated CMOS radio frequency (RF) transceiver, combined wuth dual 64-byte buffered framer block. The RF transceiver is a self-contained, fast-hopping F data modem, data late can be operated up to 1.6Mbps in buffer mode or 2Mbps in direct mode, optimised for use in the widely available 2.4GHz ISM band. It consists of a fully integrated frequency synthesizer, a power amplifier, a crystal oscillator, a demodulator, modulator, and Auto-ACK protocol engine, A reduced off chip filter is realized by the low IF RX architecture, minimizing the need for external components, The transceiver utilizes extensive digital processing for excellent overall performance, even in the presence of interference ans transmitter impairment. Typical transmit power is 0dBm and digitally controlled, low-IF receiver architecture results in sensitivity to -92dBm or better, with impressive selectivity. User can program transmitter output power. Frequency channels, and protocol setup easily through a SPI interface. In normal application. The on-chip framer processes ans stores th RF data in the background, unloading this critical timing function from the MCU. This lowers MCU speed requirements, expedites product development time, ans frees the MCU for implementing additional product features. Many configurations are possible, depending on the user's specific needs. Transmit data is easily sent over-the-air as a complete frame of data, whit syncword, SOF, address, payload, and CRC. Receiving data is just the opposite, using the syncword the train the receiver clock recoverym then the address is checked, then the data is reserve formatted for receive, followed by CRC. All of this is done in hardware the ease the programming and overhead requirements of thebaseband MCU. For longer battery life, power consumption is minimizied by automatic enabling of the various transmit, receive, PLL, and PA sections, depending on the instantaneous state of the chip. An idle mode is also provided for ultra low current consumption. This product is available in 24-lead 4*4mm JEDEC standard QFN package and Lead-free RoHS compliant. Featuring an exposed pad on the bottom for best RF characteristics. 2. Specification :
- Frequency : 2402~2480MHz
- Channel Spacing : 1MHz
- Channel Switching Speed : <125uS
- Modulation Type : FSK
- Operation Voltage : 1.8~3.6V
- Output Power : +0dBm
- Sensitivity : -90dBm / -85dBm @0.1% BER 1Mbps / 1.6Mbps(w/o ant.)
- Data Rate : 1Mbps / 1.6Mbps
- Operating Temperature : -40~+85 degree C
- Built-in Antenna : -5dBi
- TDD full-duplex, including decoder, encoder and 64byte FIFO data buffer.
- Supports Auto ACK and & Retransmit
- Supports Star-Network with 6 channels
- Supports CRC
- 4-wire digital interface (SPI)
- Small footprint size : 16.0 * 19.0 * 3.8mm. 3. Application :
- Wireless mouse, keyboard, joystick
- Keyless entry
- Alarm and security system
- Home automation
- Surveillance
- Automotive
- Telemetry
- Industrial sensors
- Wireless data communication
- Toys