915MHz EM窄带系统参考设计方案

关键词： CC1120 , EM窄带系统 , TI

TI 公司的CC1120是 全集成的868/915MHz单片无线电收发器。器件集成了所有的滤波器，因此不需要外接SAW和IF滤波器，支持包处理，数据缓冲，突发传输，空闲信道评估，链接指示和无线电微弱信号。工作参数可通过SPI接口控制，工作电压2V-3.6V，符合欧洲的ETSI EN 300 220与ETSI EN 54-25 ，美国的FCC CRF47 Part 15, FCC CFR47 Part 90, 24与101以及日本的ARIB RCR STD-T30, ARIB STD-T67, ARIB STD-T96规范，主要用在窄带超低功耗无线系统，无线计量和无线智能电网（AMR和AMI），IEEE 802.15.4g系统，家庭和建筑物自动化，工业控制，无线保健，无线传感器网络和有源RFID，私人移动无线电等。本文介绍了CC1120主要特性，系统框图，典型应用电路图以及868/915MHz EM参考设计电路图，材料清单和元件布局图。

The CC1120 is a fully integrated single-chip radio transceiver designed for high performance at low power and low voltage operation in cost effective wireless systems. All filters are integrated, removing the need for costly external SAW and IF filters. The device is mainly intended for the ISM (Industrial, Scientific and Medical) and SRD (Short Range Device) frequency bands at 164-192 MHz, 410-480 MHz and 820-960 MHz.

The CC1120 provides extensive hardware support for packet handling, data buffering, burst transmissions, clear channel assessment, link quality indication and Wake-On-Radio. The CC1120 main operating parameters can be controlled via an SPI interface. In a typical system, the CC1120 will be used together with a microcontroller and only few external passive components.

CC1120主要特性：

High Performance Single Chip Transceiver

Adjacent Channel Selectivity: 65 dB at 12.5 kHz offset

Blocking Performance: 90 dB at 10 MHz

Excellent receiver sensitivity:123 dBm at 1.2 kbps108 dBm

at 50 kbps127 dBm using built-in coding gain

Low Phase Noise: –111 dBc/Hz at 10 kHz Offset

High spectral efficiency (9.6 kbps in 12.5 kHz Channel in

Compliance with FCC Narrowbanding Mandate

电源

Wide supply voltage range (2 V – 3.6 V)

Low current consumption:RX: 3.7 mA in RX Sniff Mode

RX: 17 mA Peak Current in Low Power Mode

RX: 22 mA Peak Current in High Performance Mode

TX: 45 mA +14 dBm

Power down: < 0.3 µA

Programmable Output Power up to 16 dBm with 0.4 dB Step Size

Automatic Output Power Ramping

Configurable Data Rates: 0 to 200 kbps

Supported Modulation Formats: 2-FSK, 2- GFSK, 4-FSK, 4-GFSK, MSK, OOK

Advanced Digital Signal Processing for Improved Sync Detect Performance

RoHS Compliant 5 x 5 mm QFN 32 Package

规范

Europe - ETSI EN 300 220, ETSI EN 54-25

US - FCC CRF47 Part 15, FCC CFR47 Part 90, 24 and 101

Japan - ARIB RCR STD-T30, ARIB STD-T67, ARIB STD-T96

外设和支持功能

Enhanced Wake-On-Radio Functionality for Automatic Low-power Receive Polling

Separate 128-byte RX and TX FIFOs

Includes Functions for Antenna Diversity Support

Support for Re-transmissions

Support for Auto Acknowledge of Received Packets

TCXO Support and Control, also in Power Modes

Automatic Clear Channel Assessment (CCA) for Listen-before-talk (LBT) Systems

Built in Coding Gain Support for Increased Range and Robustness

Digital RSSI Measurement

Supports Seamless Integration with the CC1190 for Increased Range Giving 3 dB

Improvement in Sensitivity and up to 27 dBm Output Power

CC1120应用：

Narrowband Ultra Low Power Wireless Systems

with Channel sSacing Down to 12.5 kHz

170 / 433 / 868 / 915 / 950 MHz ISM/SRD Band

Wireless Metering and Wireless Smart Grid (AMR and AMI)

IEEE 802.15.4g Systems

Home and Building Automation

Wireless Alarm and Security Systems

Industrial Monitoring and Control

Wireless Healthcare Applications

Wireless Sensor Networks and Active RFID

Private Mobile Radio

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图1。CC1120系统框图

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图2。CC1120典型应用电路图

CC1120 868/915MHz EM参考设计

The CC1120 868/915MHz EM reference design contains schematics and layout files for the CC1120EM 868/915MHz evaluation module. The reference design demonstrates good techniques for CC1120 decoupling and RF layout. For optimum RF performance, these parts should be copied accurately. This is a 4-layer reference design with a discrete balun and an SMA antenna connector designed for a single ended 50 ohm antenna. The RF section has been designed for operation in the 863 to 870 MHz (EU) and 902 to 928MHz (US) frequency bands.

The EMK is an add-on kit to supplement the CC1120DK with evaluation boards supporting additional frequency bands. This document covers both the CC1120EMK and CC1121EMK.

The CC112xEM boards can be plugged into several development boards from Texas Instruments. Most notably, you can use the SmartRF Transceiver EB, which is included in the CC1120DK. This board lets you run a packet error rate (PER) test, control the device from SmartRF™ Studio and it can be used as a development platform.

It is also possible to connect the EM to other TI development boards with the appropriate connectors or to the basic “SoC Battery Board”.

The latter can be used as a carrier board for the EM to simplify the connection to other boards with a microcontroller.

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2 x CC1120 or CC1121 Evaluation Modules

2 x Pulse Antennas

图3。CC1120 868/915MHz EM参考设计外形图

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图4。CC1120 868/915MHz EM参考设计电路图

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图4。CC1120 868/915MHz EM参考设计元件布局图

CC1120 868-915MHz EM参考设计材料清单见：

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CC1120 868-915MHz EM参考设计材料清单.rar (51.37 KB, 下载次数: 3)

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详情请见：

cc1120.pdf (636.61 KB, 下载次数: 1)

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