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AD8361ART-REEL7 데이터시트(PDF) 1 Page - Analog Devices |
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AD8361ART-REEL7 데이터시트(HTML) 1 Page - Analog Devices |
1 / 16 page REV. A 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD8361 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000 LF to 2.5 GHz TruPwr™ Detector FUNCTIONAL BLOCK DIAGRAMS micro_SOIC RFIN IREF PWDN VPOS FLTR SREF VRMS COMM BAND-GAP REFERENCE ERROR AMP 2 2 AD8361 INTERNAL FILTER ADD OFFSET TRANS- CONDUCTANCE CELLS i i 7.5 BUFFER SOT-23-6L RFIN PWDN VPOS FLTR VRMS COMM BAND-GAP REFERENCE 2 2 AD8361 INTERNAL FILTER TRANS- CONDUCTANCE CELLS i i ERROR AMP 7.5 BUFFER FEATURES Calibrated RMS Response Excellent Temperature Stability Up to 30 dB Input Range at 2.5 GHz 700 mV rms, 10 dBm re 50 Maximum Input 0.25 dB Linear Response Up to 2.5 GHz Single Supply Operation: 2.7 V to 5.5 V Low Power: 3.3 mW at 3 V Supply Rapid Power-Down to Less than 1 A APPLICATIONS Measurement of CDMA, W-CDMA, QAM, Other Complex Modulation Waveforms RF Transmitter or Receiver Power Measurement PRODUCT DESCRIPTION The AD8361 is a mean-responding power detector for use in high- frequency receiver and transmitter signal chains, up to 2.5 GHz. It is very easy to apply. It requires only a single supply between 2.7 V and 5.5 V, power supply decoupling capacitor and an input coupling capacitor in most applications. The output is a linear-responding dc voltage with a conversion gain of 7.5 V/V rms. An external filter capacitor can be added to increase the averag- ing time constant. RFIN – V rms 3.0 1.6 0 0.5 0.1 0.2 0.3 0.4 2.6 2.2 2.0 1.8 2.8 2.4 1.4 1.2 1.0 0.6 0.8 0.4 0.2 0.0 SUPPLY REFERENCE MODE INTERNAL REFERENCE MODE GROUND REFERENCE MODE Figure 1. Output in the Three Reference Modes, Supply 3 V, Frequency 1.9 GHz (SOT-23-6L Package Ground Reference Mode Only) TruPwr is a trademark of Analog Devices, Inc. The AD8361 is intended for true power measurement of simple and complex waveforms. The device is particularly useful for measuring high crest-factor (high peak-to-rms ratio) signals, such as CDMA and W-CDMA. The AD8361 has three operating modes to accommodate a variety of analog-to-digital converter requirements: 1. Ground referenced mode, in which the origin is zero; 2. Internal reference mode, which offsets the output 350 mV above ground; 3. Supply reference mode, which offsets the output to VS/7.5. The AD8361 is specified for operation from –40 °C to +85°C and is available in 8-lead micro_SOIC and 6-lead SOT packages. It is fabricated on a proprietary high fT silicon bipolar process. |
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