ATA5428 UHF Transceiver for ASK and FSK Systems, 315 MHz0 pages

ATA5428
UHF ASK/FSK Transceiver
DATASHEET

Features
● Multi channel half-duplex transceiver with approximately ±2.5MHz programmable
tuning range
● High FSK sensitivity: –106dBm at 20Kbit/s/–109.5dBm at 2.4Kbit/s (433.92MHz)
● High ASK sensitivity: –112.5dBm at 10Kbit/s/–116.5dBm at 2.4Kbit/s (433.92MHz)
● Low supply current: 10.5mA in RX and TX Mode (3V/TX with 5dBm)
● 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 blocking 55dB at ±750kHz/61dB at ±1.5MHz and
70dB at ±10MHz, system I1dBCP = –30dBm/system IIP3 = –20dBm)
● 226kHz/237kHz IF frequency with 30dB image rejection and 170kHz usable IF
bandwidth
● 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 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 max.500kBit/s
● Configurable self polling and RX/TX protocol handling with FIFO-RAM buffering of
received and transmitted data
● Five push button inputs and one 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 ±1.8dB within ±58kHz center frequency
change in the complete temperature and supply voltage range
● Supply voltage switch, supply voltage regulator, reset generation, clock/interrupt
generation and low battery indicator for microcontroller

4841G-WIRE-03/14