浅谈ATA5830构成的低功耗UHF ASK（FSK）RF收发方案

　　ATA5830是通用高度集成低功耗UHF ASK/FSK RF单片收发器，包括了RF部分，数字基带和AVR 微控制器内核，内核是采用增强RISC架构的低功耗CMOS 8位MCU.收发器工作在ISM频段，频率范围为310MHz- 318MHz, 418MHz-477MHz以及 836MHz - 928MHz,数据速率0.5k到20kBit/s Manchester,工作电压1.9V-3.6V和4.5V-5.5V,工作温度–40℃到+105℃，主要用在RKE,TPMS,遥控起动和控制系统，以及智能RF应用。

　　ATA5830主要特性：

　  Supported Data Rate 0.5k to 20kBit/s Manchester （Higher Data Rates in ransparent

　　Mode）

　　Programmable RX-IF Bandwidth 25kHz to 360kHz （Approx. 10% Increments）

　　Frequency Ranges 310MHz to 318MHz, 418MHz to 477MHz, and 836MHz to 928MHz

　　– 315.00MHz/433.92MHz/868.30MHz and 915.00MHz with 24.305MHz Crystal Freq.

　　Programmable Channel Frequency with Fractional PLL

　　– 92Hz Resolution for Low Band

　　– 184Hz Resolution for High Band

　　FSK Deviation ±0.375kHz to ±90kHz

　　FSK Sensitivity （Manchester） at 433.92MHz

　　– –106dBm at 20kBit/s, f = ±20kHz, IFBW = 165kHz

　　– –109dBm at 10kBit/s, f = ±10kHz, IFBW = 165kHz

　　– –111dBm at 5kBit/s, f = ±5kHz, IFBW = 165kHz

　　– –119dBm at 0.75kBit/s, f = ±0.75kHz, IFBW = 25kHz

　　ASK Sensitivity （Manchester） at 433.92MHz

　　– –108dBm at 20kBit/s, BW = 360kHz

　　– –116dBm at 1kBit/s, BW = 360kHz

　　Excellent Blocking （IFBW = 165kHz）： 64dBC at Freq. Offset = 1MHz and 50dBC at 25kHz

　　High Image Rejection Typ. 55dB （315MHz/433.92MHz）； Typ. 50dB 68.3MHz/915MHz） without Calibration

　　Input 1dB Compression Point

　　– Typ. –35dBm （Full Sensitivity Level）

　　– Typ. –20dBm （15dB Reduced Sensitivity）

　　Digital RSSI with Accuracy of ±5dB and 0.5dB Resolution

　　Programmable Output Power –10dBm to 14dBm （1dB Increments）

　　Low Current Consumption

　　– Typ. 9.3mA for RX （Low Band） Typ. 580μA Three-channel Polling

　　– Typ. 9.6/15.5mA for TX （Low Band, Pout = 6/10dBm）

　　Max. Power Down Current Consumption of 600nA at VS = 3.6V and T = 85℃

　　Programmable Clock Output Derived from Crystal Frequency

　　6Kbytes of In-system Self-programmable Flash for an Additional Application Software

　　24Kbytes of ROM with Atmel Firmware

　　512 Bytes of EEPROM Data Memory for Transceiver Configuration and 768 Bytes of SRAM

　　SPI Interface for RX/TX Data Access and Transceiver Configuration

　　IRQ Signal Indicates the IC Condition Status

　　Automatic Antenna Tuning at TX Center Frequency for Loop Antenna

　　Automatic Application Channel Polling （3 RKE Channels, TPMS, RS）

　　ID Scanning Up to 18 Different IDs （ID Lengths of up to 4 Bytes）

　　Supply Voltage Range 1.9V to 3.6V and 4.5V to 5.5V

　　Temperature Range –40℃ to +105℃

　　Excellent ESD Protection at All Pins （±4kV HBM, ±200V MM, ±750V FCDM）

　　Small 5mm x 5mm QFN 32 Package Pin/Pitch 0.5mm

　　Pin Compatible IC with Rx Performance Identical with the Atmel Receiver ATA5780

　　Appropriate for Application Systems Compliant with EN 300 220 and FCC 15

　　ATA5830目标应用：

　　The transceiver is designed for use in the following application areas:

　　Remote Keyless Entry System （RKE）

　　Tire Pressure Monitoring System （TPMS）

　　Remote Start System （RS）

　　Remote Control System, e.g. garage door openers

　　Smart RF applications

图1.ATA5830简化系统方框图

图2.ATA5830 CPU核方框图

图3.ATA5830典型3V应用电路图

图4.ATA5830典型5V应用电路图

　　图5.ATA5830采用回路天线的典型3V应用电路图