ATA5830構成的低功耗UHF ASK(FSK)RF收發方

本文介紹了ATA5830主要特性,方框圖以及3V和5V的典型應用電路.

ATA5830是通用高度集成低功耗UHF ASK/FSK RF單片收發器,包括了RF部分,數字基帶和AVR 微控制器內核,內核是采用增強RISC架構的低功耗CMOS 8位MCU.收發器工作在ISM頻段,頻率范圍為310MHz- 318MHz, 418MHz-477MHz以及 836MHz - 928MHz,數據速率0.5k到20kBit/s Manchester,工作電壓1.9V-3.6V和4.5V-5.5V,工作溫度–40℃到+105℃,主要用在RKE,TPMS,遙控起動和控制系統,以及智能RF應用.

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目標應用:

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

圖1.ATA5830簡化系統方框圖

圖2.ATA5830 CPU核方框圖

圖3.ATA5830典型3V應用電路圖

圖4.ATA5830典型5V應用電路圖

圖5.ATA5830采用回路天線的典型3V應用電路圖