ATA5823/ATA5824 UHF Transceiver for ASK and FSK Systems, Full Duplex0 pages

ATA5823/ATA5824
UHF ASK/FSK Transceiver
DATASHEET

Features
● High FSK sensitivity: –105.5dBm at 20Kbit/s/–109dBm at 2.4Kbit/s (433.92MHz)
● High ASK sensitivity: –111.5dBm at 10Kbit/s/–116dBm at 2.4Kbit/s (100% ASK,
carrier level 433.92MHz)
● Low supply current: 10.5mA in RX and TX mode (3V/TX with 5dBm/433.92MHz)
● Data rate 1 to 20Kbit/s Manchester FSK, 1 to 10Kbit/s Manchester ASK
● ASK/FSK receiver uses a low IF architecture with high selectivity, blocking and low
intermodulation (typical 3dB blocking 55.5dBC at ±750kHz/60.5dBC at ±1.5MHz
and 67dBC at ±10MHz, system I1dBCP = –30dBm/system IIP3 = –20dBm)
● Wide bandwidth AGC to handle large outband blockers above the system I1dBCP
● 226kHz IF (intermediate frequency) with 30dB image rejection and 220kHz system
bandwidth to support TPM transmitters using Atmel® ATA5756/ATA5757
transmitters with standard crystals
● Transmitter uses closed loop FSK modulation with fractional-N synthesizer with
high PLL bandwidth and an excellent isolation between PLL and PA
● Tolerances of XTAL compensated by fractional-N synthesizer with 800Hz 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 500kBit/s
maximum
● Configurable self polling and RX/TX protocol handling with FIFO-RAM buffering of
received and transmitted data
● 1 push button input and 1 wake-up input are active in power-down mode
● Integrated XTAL capacitors
● PA efficiency: up to 38% (433.92MHz/10dBm/3V)
● Low In-band sensitivity change of typically ±2.0dB within ±75kHz center frequency
change in the complete temperature and supply voltage range

4829F-RKE-05/14