AD8361-EVAL Analog Devices Inc, AD8361-EVAL Datasheet
AD8361-EVAL
Specifications of AD8361-EVAL
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AD8361-EVAL Summary of contents
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... Measurement of CDMA, W-CDMA, QAM, other complex modulation waveforms RF transmitter or receiver power measurement GENERAL DESCRIPTION The AD8361 is a mean-responding power detector for use in high frequency receiver and transmitter signal chains 2.5 GHz very easy to apply. It requires a single supply only between 2.7 V and 5 power supply decoupling capacitor, and an input coupling capacitor in most applications ...
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... Circuit Description......................................................................... 11 REVISION HISTORY 8/04—Data Sheet Changed from Rev Rev. C. Changed Trimpots to Trimmable Potentiometers .........Universal Changes to Specifications ................................................................ 3 Changed Using the AD8361 Section Title to Applications ....... 12 Changes to Figure 43...................................................................... 14 Changes to Ordering Guide .......................................................... 24 Updated Outline Dimensions ....................................................... 24 2/01—Data Sheet Changed from Rev Rev. B. ...
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... FLTR Pin, 224 mV rms at RFIN −40°C < T < +85° rms at RFIN, PWDN Input LO GRM or IRM rms at RFIN, PWDN Input HI SRM rms at RFIN, PWDN Input HI plications section. Applications section. Rev Page AD8361 Min Typ Max Unit 2.5 GHz 390 mV rms 4.9 dBm 660 mV rms 9 ...
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... AD8361 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Rating Supply Voltage V 5 SREF, PWDN IREF V − 0 RFIN 1 V rms Equivalent Power Ω 13 dBm 1 Internal Power Dissipation 200 mW 6-Lead SOT-23 170 mW 8-Lead MSOP 200 mW Maximum Junction Temperature 125°C Operating Temperature Range −40°C to +85°C Storage Temperature Range − ...
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... Supply Reference Control Pin. To enable supply reference mode, this pin must be connected to VPOS; otherwise, it should be connected to COMM (ground). SREF VRMS FLTR COMM divided by 100 kΩ). S Rev Page VRMS VPOS 1 6 AD8361 COMM RFIN 2 TOP VIEW 5 (Not to Scale) FLTR PWDN 3 4 Figure 5. 6-Lead SOT-23 − 0 applied, the device is turned off and the supply S AD8361 ...
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... AD8361 TYPICAL PERFORMANCE CHARACTERISTICS 2.8 900MHz 2.6 2.4 2.2 100MHz 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 0.1 0.2 0.3 INPUT (V rms) Figure 6. Output vs. Input Level, Frequencies 100 MHz, 900 MHz, 1900 MHz, and 2500 MHz, Supply 2.7 V, Ground Reference Mode, MSOP 5 ...
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... FREQUENCY (MHz) Figure 17. Input Impedance vs. Frequency, Supply 3 V, Temperatures −40°C, +25°C, and +85°C, MSOP (See Applications for SOT-23 Data) AD8361 0.4 (+5dBm) +85°C 0.7 0.8 1.8 1.6 1.4 1.2 1.0 0.8 0.6 ...
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... AD8361 0.03 0.02 0.01 0.00 –0.01 –0.02 MEAN ±3 SIGMA –0.03 –0.04 –0.05 –40 – TEMPERATURE (°C) Figure 18. Output Reference Change vs. Temperature, Supply 3 V, Ground Reference Mode 0.02 0.01 0.00 –0.01 MEAN ±3 SIGMA –0.02 –0.03 –40 – TEMPERATURE (°C) Figure 19. Output Reference Change vs. Temperature, Supply 3 V, Internal Reference Mode (MSOP Only) 0 ...
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... Levels, Supply 3 V, Frequency 900 MHz, 0.01 µF Filter Capacitor C2 C4 AD8361 100pF VPOS SREF IREF VRMS FLTR 3 RFIN 6 R1 0.1µF 75Ω COMM 4 PWDN 5 HP8648B HP8110A SIGNAL SIGNAL GENERATOR Figure 29. Hardware Configuration for Output Response Using Power-Down Mode AD8361 TEK TDS784C SCOPE TEK P6204 FET PROBE C5 100pF ...
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... PER HORIZONTAL DIVISION Figure 31. Output Response to Gating on Power Supply, for Various RF Input Levels, Supply 3 V, Modulation Frequency 900 MHz, 0.01 µF Filter Capacitor HP8110A AD811 PULSE GENERATOR 50Ω 732Ω AD8361 100pF 0.01µF SREF VPOS 1 8 IREF VRMS ...
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... On the other hand, the squaring cells in the AD8361 have a Class-AB aspect; the peak input is not limited by their quiescent bias condition but is determined mainly by the eventual loss of square-law conformance ...
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... Output Swing Figure 39 shows the output swing of the AD8361 for supply voltage for each of the three modes clear from Figure 39 that operating the device in either internal reference ...
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... Figure 40. Output Swing for Supply Voltages of 2.7 V, 3.0 V, 5.0 V and 5.5 V (MSOP Only) Dynamic Range Because the AD8361 is a linear-responding device with a nominal transfer function of 7.5 V/V rms, the dynamic range not clear from plots such as Figure 39. As the input level is increased in constant dB steps, the output step size (per dB) also increases ...
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... AD8361 Input Coupling Using a Series Resistor Figure 46 shows a technique for coupling the input signal into the AD8361 that may be applicable where the input signal is much larger than the input range of the AD8361. A series resistor combines with the input impedance of the AD8361 to RFIN attenuate the input signal ...
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... Figure 27 and Figure 28 show the response of the output of the AD8361 to a pulse on the PWDN pin, with no capacitance and with a filter capacitance of 0.01 µF, respectively; the turn-on time is a function of the filter capacitor ...
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... Figure 51. Output Buffering Options, Slope of 7.5 V/V rms OUTPUT REFERENCE TEMPERATURE DRIFT COMPENSATION The error due to low temperature drift of the AD8361 can be reduced if the temperature is known. Many systems incorporate a temperature sensor; the output of the sensor is typically digitized, facilitating a software correction. Using this information, only a two-point calibration at ambient is required. The output voltage of the AD8361 at ambient (25° ...
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... AD8361 has useful performance at higher frequencies. Typical applications may include MMDS, LMDS, WLAN, and other noncellular activities. In order to characterize the AD8361 at frequencies greater than 2.5 GHz, a small collection of devices were tested. Dynamic range, conversion gain, and output intercept were measured at several frequencies over a temperature range of − ...
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... The conversion gain relates the measurement sensitivity of the AD8361 to the rms input voltage of the RF waveform. The conversion gain was measured for a number of devices over a temperature range of −30°C to +80°C. The conversion gain for a typical device is shown in Figure 59 ...
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... RF INPUT SPLITTER One of the AD8361s (U2) has a net gain of about 14 dB preceding it and therefore operates most accurately at low input signal levels. This is referred to as the weak signal path. U4, on the other hand, does not have the added gain and provides accurate response at high levels. The output attenuated order to cancel the effect of U2’ ...
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... In principle, this method could be extended to three or more AD8361s in pursuit of even more measurement range. However very important to pay close attention to the matter of not excessively overdriving the AD8361s in the weaker signal paths under strong signal conditions. Figure 63 shows the extended range transfer function at multiple temperatures ...
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... See Table 4 for more details. C1, R2 Input Coupling. The 75 Ω resistor in Position R2 combines with the AD8361’s internal input impedance to give a broadband input impedance of around 50 Ω. For more precise matching at a particular frequency, R2 can be replaced by a different value (see Input Coupling and Matching and Figure 43 through Figure 46) ...
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... Figure 66. Layout of Component Side, MSOP Figure 67. Silkscreen of Component Side, MSOP 0Ω (OPEN) R4 0Ω V rms C4 R5 (OPEN) (OPEN) VPOS TP1 Rev Page 100pF AD8361 VPOS VRMS 1 6 TP2 VPOS R5 COMM RFIN (OPEN 100pF 3 PWDN 4 FLTR C5 1nF TP1 J3 Figure 68. Evaluation Board Schematic, SOT-23 Figure 69 ...
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... When such precautions are taken, measurements are less sensitive to cable length and other fixture issues actual application when the distance between AD8361 and source is short and well defined, this 3 dB attenuator is not needed. CHARACTERIZATION SETUPS Equipment The primary characterization setup is shown in Figure 72 ...
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... AD8361ART-REEL −40°C to +85°C AD8361ART-REEL7 −40°C to +85°C AD8361ARTZ-RL7 1 −40°C to +85°C AD8361-EVAL AD8361ART-EVAL Pb-free part. © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 1.60 BSC INDICATOR 1 ...