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AD8364-EVAL-2140 数据表(PDF) 1 Page - Analog Devices |
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AD8364-EVAL-2140 数据表(HTML) 1 Page - Analog Devices |
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1 / 48 page  LF to 2.7 GHz Dual 60 dB TruPwr™ Detector AD8364 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved. FEATURES RMS measurement of high crest-factor signals Dual-channel and channel difference outputs ports Integrated accurately scaled temperature sensor Wide dynamic range ±1 dB over 60 dB ±0.5 dB temperature-stable linear-in-dB response Low log conformance ripple +5 V operation at 70 mA, –40°C to +85°C Small footprint, 5 mm x 5 mm, LFCSP APPLICATIONS Wireless infrastructure power amplifier linearization/control Antenna VSWR monitor Gain and power control and measurement Transmitter signal strength indication (TSSI) Dual-channel wireless infrastructure radios FUNCTIONAL BLOCK DIAGRAM CHANNEL A TruPwr™ CHANNEL B TruPwr™ 1 2 3 4 5 6 7 8 24 23 22 21 20 19 18 17 25 26 27 28 29 30 31 32 VPSA VPSB INHB INLB COMR PWDN INLA INHA 16 15 14 13 12 11 10 9 VSTA VSTB OUTB FBKB OUTN OUTP FBKA OUTA BIAS TEMP OUTA OUTB ISIG2 ITGT2 VGA CONTROL VGA CONTROL ISIG2 ITGT2 Figure 1. Functional Block Diagram GENERAL DESCRIPTION The AD8364 is a true rms, responding, dual-channel RF power measurement subsystem for the precise measurement and control of signal power. The flexibility of the AD8364 allows communi- cations systems, such as RF power amplifiers and radio transceiver AGC circuits, to be monitored and controlled with ease. Operating on a single 5 V supply, each channel is fully specified for operation up to 2.7 GHz over a dynamic range of 60 dB. The AD8364 provides accurately scaled, independent, rms outputs of both RF measurement channels. Difference output ports, which measure the difference between the two channels, are also available. The on-chip channel matching makes the rms channel difference outputs extremely stable with temperature and process variations. The device also includes a useful temperature sensor with an accurately scaled voltage proportional to temperature, specified over the device operating temperature range. The AD8364 can be used with input signals having rms values from −55 dBm to +5 dBm referred to 50 Ω and large crest factors with no accuracy degradation. Integrated in the AD8364 are two matched AD8362 channels (see the AD8362 data sheet for more information) with improved temperature performance and reduced log conformance ripple. Enhancements include improved temperature performance and reduced log-conformance ripple compared to the AD8362. On- chip wide bandwidth output op amps are connected to accom- modate flexible configurations that support many system solutions. The device can easily be configured to provide four rms measurements simultaneously. Linear-in-dB rms measurements are supplied at OUTA and OUTB, with conveniently scaled slopes of 50 mV/dB. The rms difference between OUTA and OUTB is available as differential or single-ended signals at OUTP and OUTN. An optional voltage applied to VLVL provides a common mode reference level to offset OUTP and OUTN above ground. The AD8364 is supplied in a 32-lead, 5 mm × 5 mm LFCSP, for the operating temperature of –40°C to +85°C. |
类似零件编号 - AD8364-EVAL-2140 |
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类似说明 - AD8364-EVAL-2140 |
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