ATA8201/ATA8202 UHF ASK/FSK Receiver DATASHEET Features Transparent RF receiver ICs for 315MHz (Atmel ATA8201) and 433.92MHz (Atmel ATA8202) with high receiving sensitivity Fully integrated PLL with low phase noise VCO, PLL, and loop filter High FSK/ASK sensitivity: -3 105dBm (Atmel ATA8201, FSK, 9.6Kbits/s, Manchester, BER 10 -3 114dBm (Atmel ATA8201, ASK, 2.4Kbits/s, Manchester, BER 10 ) -3 104dBm (Atmel ATA8202, FSK, 9.6Kbits/s, Manchester, BER 10 ) -3 113dBm (Atmel ATA8202, ASK, 2.4Kbits/s, Manchester, BER 10 ) Supply current: 6.5mA in Active Mode (3V, 25C, ASK Mode) Data rate: 1Kbit/s to 10Kbits/s Manchester ASK, 1Kbit/s to 20Kbits/s Manchester FSK with four programmable bit rate ranges Switching between modulation types ASK/FSK and different data rates possible in 1ms typically, without hardware modification on board to allow different modulation schemes Low standby current: 50A at 3V, 25C ASK/FSK receiver uses a low-IF architecture with high selectivity, blocking, and low intermodulation (typical 3-dB blocking 68.0dBC at 3MHz/74.0dBC at 20.0MHz, system I1dBCP = 31dBm/system IIP3 = 24dBm) Telegram pause up to 52ms supported in ASK Mode Wide bandwidth AGC to handle large out-of-band blockers above the system I1dBCP 440-kHz IF frequency with 30-dB image rejection and 420-kHz IF bandwidth to support PLL transmitters with standard crystals or SAW-based transmitters RSSI (received signal strength indicator) with output signal dynamic range of 65dB Low in-band sensitivity change of typically 2.0dB within 160-kHz center frequency change in the complete temperature and supply voltage range Sophisticated threshold control and quasi-peak detector circuit in the data slicer Fast and stable XTO start-up circuit (> 1.4 k worst-case start impedance) Clock generation for microcontroller ESD protection at all pins (4kV HBM, 200V MM, 500V FCDM) 4971G-INDCO-09/14 Dual supply voltage range: 2.7V to 3.3V or 4.5V to 5.5V Temperature range: 40C to +85C Small 5mm 5mm QFN24 package Applications Industrial/aftermarket keyless entry and tire pressure monitoring systems Alarm, telemetering and energy metering systems Remote control systems for consumer and industrial markets Access control systems Home automation Home entertainment Toys Benefits Supports header and blanking periods of protocols common in RKE and TPM systems (up to 52ms in ASK Mode) All RF relevant functions are integrated. The single-ended RF input is suited for easy adaptation to / 4 or printed-loop antennas Allows a low-cost application with only 8 passive components Optimal bandwidth maximizes sensitivity while maintaining SAW transmitter compatibility Clock output provides an external microcontroller crystal-precision time reference Well suited for use with Atmel PLL transmitter ATA8401/ATA8402/ATA8403/ATA8404/ATA8405 2 ATA8201/ATA8202 DATASHEET 4971GINDCO09/14