TIDA-00897

High-Accuracy Logarithmic RMS Power Detector Reference Design for WLAN Applications

TIDA-00897

Design files

Overview

Dynamic transmit-power control is critical for improving spectral efficiency and reducing adjacent channel interference in wireless local area networks (WLANs). In addition, regulatory agencies worldwide require that transmit power be limited to a certain level to reduce interference with other communication equipment. Another benefit of transmit power control in WLAN systems is to prolong battery life by reducing power-supply voltage to the power amplifier. This reference design is a closed-loop dynamic transmit power control for WLAN application. Although this particular design implements WLAN transmit power control, similar concepts can be used to implement power control schemes for other wireless technologies, such as LTE.

Applications for transmit power control span a very wide range: from mobile handheld devices to industrial to automotive applications. For example, LMH2110 can be employed in automotive electronics to satisfy transmit power control needs of LTE or WiFi communication systems.

Features
  • High-accuracy logarithmic RMS-power detection for WLAN transmit chain at 5 GHz to 6 GHz
  • 45-dB linear-in-dB power detection range
  • LOG conformance better than ±0.5 dB
  • Highly temperature insensitive (±0.25 db over operating temperature range)
  • Modulation independent response
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUB96.PDF (1224 K)

Reference design overview and verified performance test data

TIDRKI0.PDF (273 K)

Detailed schematic diagram for design layout and components

TIDRKI1.PDF (96 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDCBT8.ZIP (2165 K)

Design file that contains information on physical board layer of design PCB

TIDRKI2.PDF (932 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Linear & low-dropout (LDO) regulators

LP5912500-mA low-noise low-IQ low-dropout voltage regulator with reverse current protect

Data sheet: PDF | HTML
RF power detectors

LMH21108 GHz Logarithmic RMS Power Detector With 45 dB Dynamic Range

Data sheet: PDF | HTML

Technical documentation

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* Design guide High-Accuracy Logarithmic RMS Power Detector for WLAN Applications Design Guide Dec. 10, 2015

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