ATA5428

www.DataSheet4U.com Features Multi Channel Half–duplex Transceiver with Approximately ±2.5 MHz Programmable Tuning Range High FSK Sensitivity: –106 dBm at 20 kBaud/–109.5 dBm at 2.4 kBaud (433.92 MHz) High ASK Sensitivity: –112.5 dBm at 10 kBaud/–116.5 dBm at 2.4 kBaud (433.92 MHz) Low Supply Current: 10.5 mA in RX and TX Mode (3 V/TX with 5 dBm) Data Rate: 1 to 20 kBaud Manchester FSK, 1 to 10 kBaud Manchester ASK ASK/FSK Receiver Uses a Low–IF Architecture with High Selectivity, Blocking, and Low Intermodulation (Typical Blocking 55 dB at ±750 kHz/61 dB at ±1.5 MHz and 70 dB at ±10 MHz, System I1dBCP = –30 dBm/System IIP3 = –20 dBm) 226 kHz IF Frequency with 30 dB Image Rejection and 170 kHz Usable IF Bandwidth (TBD) Transmitter Uses Closed Loop Fractional–N Synthesizer for FSK Modulation with a High PLL Bandwidth and an Excellent Isolation between PLL/VCO and PA Tolerances of XTAL Compensated by Fractional–N Synthesizer with 800 Hz RF Resolution Integrated RX/TX–Switch, Single–ended RF Input and Output RSSI (Received Signal Strength Indicator) Communication to Microcontroller with SPI Interface Working at Maximum 500 kBit/s Configurable Self Polling and RX/TX Protocol Handling with FIFO–RAM Buffering of Received and Transmitted Data 5 Push Button Inputs and One Wake–up Input are Active in Power–down Mode Integrated XTAL Capacitors PA Efficiency: up to 38% (433.92 MHz/10 dBm/3 V) Low In–band Sensitivity Change of Typically ±1.8 dB within ±58 kHz Center Frequenc...