Features High FSK Sensitivity: 105.5 dBm at 20 Kbits/s, 109 dBm at 2.4 Kbits/s (433.92 MHz) High ASK Sensitivity: 111.5 dBm at 10 Kbits/s, 116 dBm at 2.4 Kbits/s (100% ASK Carrier Level, 433.92 MHz) Low Supply Current: 10.5 mA in RX Mode Data Rate 1 to 20 Kbits/s Manchester FSK, 1 to 10 Kbits/s Manchester ASK ASK/FSK Receiver Uses a Low IF Architecture with High Selectivity, Blocking, and Low Intermodulation (Typical 3-dB Blocking 55.5 dBC at 750 kHz/60.5 dBC at 1.5 MHz and 67 dBC at 10 MHz, System I1dBCP = 30 dBm/System IIP3 = 20 dBm) UHF ASK/FSK Wide Bandwidth AGC to Handle Large Outband Blockers above the System I1dBCP 226-kHz IF (Intermediate Frequency) with 30-dB Image Rejection and 220-kHz System Receiver Bandwidth to Support TPM Transmitters using ATA5756/ATA5757 Transmitters with Standard Crystals XTAL Tolerances Compensated by Fractional-N Synthesizer with 800 Hz RF Resolution Single-ended RF Input ATA5721 RSSI (Received Signal Strength Indicator) Communication to Microcontroller with SPI Interface Working at 500 Kbits/s Maximum ATA5722 Configurable Self Polling and RX/TX Protocol Handling with FIFO-RAM Buffering of Received Data 1 Push Button Input and 1 Wake-up Input are Active in Power-down Mode Integrated XTAL Capacitors Low In-band Sensitivity Change of Typically 2.0 dB within 75-kHz Center Frequency Change in the Complete Temperature and Supply Voltage Range Fully Integrated PLL with Low-phase-noise VCO, PLL Loop Filter and Full Support of Multi-channel Operation with Arbitrary Channel Distance due to Fractional-N Synthesizer Sophisticated Threshold Control and Quasi-peak Detector Circuit in the Data Slicer 315 MHz and 433.92 MHz without External VCO and PLL Components Efficient XTO Start-up Circuit (> 1.5-k Worst-case Start Impedance) Changing of Modulation Type ASK/FSK and Data Rate without Component Changes to Allow Different Modulation Schemes in TPM and RKE Minimal External Circuitry Requirements for Complete System Solution Clock and Interrupt Generation for Microcontroller ESD Protection at all Pins (2.5 kV HBM, 200V MM, 500V FCDM) Supply Voltage Range: 2.15V to 3.6V or 4.4V to 5.25V Typical Power-down Current < 10 nA Temperature Range: 40C to +105C Small 7 mm 7 mm QFN48 Package 4960BRKE07/071. Pin Configuration Figure 1-1. Pinning QFN48 48 47 46 45 44 43 42 41 40 39 38 37 NC 1 36 RSSI NC 2 35 CS NC 3 34 TEST3 RF IN 4 33 SCK NC 5 32 SDI TMDI 433 N868 6 31 SDO TMDO ATA5721/ATA5722 NC 7 30 CLK NC 8 29 IRQ NC 9 28 POUT NC 10 27 VSINT NC 11 26 NC NC 25 XTAL2 12 13 14 15 16 17 18 19 20 21 22 23 24 2 ATA5721/ATA5722 4960BRKE07/07 NC NC NC NC NC RX ACTIVE N PWR ON AVCC VS2 SCK PHA VS1 SCK POL NC SETPWR TEST1 NC DVCC PWR ON RX TX1 CS POL TEST2 RX TX2 XTAL1 CDEM