ATA5830构成的低功耗UHF ASK(FSK)RF收发方

本文介绍了ATA5830主要特性,方框图以及3V和5V的典型应用电路.

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