TI 2591 2.4GHz RF前端方案_电子技术

TI 2591 2.4GHz RF前端方案

点击数：7147 次录入时间：03-04 11:54:00 整理：http://www.55dianzi.com 电子技术

TI 公司的CC2591 是高性价比和高性能的2.4GHz RF前端,适合低功耗低电压2.4GHz无线应用.CC2591的输出功率高达22dBm,集成了开关,匹配网络和平衡/不平衡电路,电感,功率放大器(PA)以及低噪音放大器(LNA),可以用在所有的2.4GHz ISM系统,无线传感器网络,无线工业系统, IEEE 802.15.4 和ZigBee系统,无线消费类电子系统和无线音频系统.本文介绍了CC2591主要特性, CC2591方框图, CC2591+CC24XX应用电路以及CC2591+CC2500/10/11应用电路, CC2430-CC2591EMK参考设计和CC2591EMK 参考设计电路图.

CC2591 2.4-GHz RF Front End
CC2591 is a cost-effective and high performance RF Front End for low-power and low-voltage 2.4-GHz wireless applications.

CC2591 is a range extender for all existing and future 2.4-GHz low-power RF transceivers, transmitters and System-on-Chip products from Texas Instruments.

CC2591 increases the link budget by providing a power amplifier for increased output power, and an LNA with low noise figure for improved receiver sensitivity.

CC2591 provides a small size, high output power RF design with its 4x4-mm QFN-16 package.
CC2591 contains PA, LNA, switches, RF-matching, and balun for simple design of high performance wireless applications.

主要特性:

Seamless Interface to 2.4-GHz Low Power RF Devices from Texas Instruments
Up to 22-dBm Output Power
6-dB Typical Improved Sensitivity on CC24xx and CC2500, CC2510, and CC2511
Few External Components
Integrated Switches
Integrated Matching Network
Integrated Balun
Integrated Inductors
Integrated PA
Integrated LNA
Digital Control of LNA Gain by HGM Pin
100-nA in Power Down (EN = PAEN = 0)
Low Transmit Current Consumption(100-mA at 3-V for 20-dBm Out, PAE = 33%)
Low Receive Current Consumption
3.4-mA for High Gain Mode
1.7-mA for Low Gain Mode
4.8-dB LNA Noise Figure, including T/R Switch and external antenna match
RoHS Compliant 4×4-mm QFN-16 Package
2-V to 3.6-V Operation

应用:
All 2.4-GHz ISM Band Systems
Wireless Sensor Networks
Wireless Industrial Systems
IEEE 802.15.4 and ZigBee Systems
Wireless Consumer Systems
Wireless Audio Systems

图1.CC2591方框图

图2.CC2591+CC24XX应用电路

图3.CC2591+CC2500/10/11应用电路

图4.CC2591+CC2520应用电路
The CC2591EM can be used as an add-on to your existing 2.4 GHz system to increase output power to +20 dBm and improve receiver sensitivity up to 6 dB. A 50 ohm coax cable with SMA connectors should be used to connect the RF signal from the radio to the input of CC2591EM, and the antenna (included) should be connected to the output (see the CC2591EMK Quick Start Guide for instruction). The kit requires that you already have another complete 2.4 GHz development kit or RF board.)

图5. CC2591EMK 参考设计电路图

The CC2591 RF Front End includes PA, LNA, switches, balun, RF matching network and inductor, and will increase output power and improve receiver sensitivity on a 2.4 GHz low-power RF solution (see the CC2591 web folder). The CC2430 is an IEEE 802.15.4 compliant System-on-Chip with radio, MCU and Flash (see the CC2430 web folder).
The CC2430-CC2591EMK consists of two CC2430-CC2591EM Evaluation Modules. These modules can be used together with a SmartRF®04 Evaluation Board to evaluate the chip, do RF testing and for prototyping. Also the output power can be increased to around +20dBm, and sensitivity will be improved by up to 6 dB compared with the CC2430 stand alone evaluation module.

The CC2430-CC2591EMK should be used together with a SmartRF04EB Evaluation Board, which is included in the CC2430DK Development Kit