adl5505 Analog Devices, Inc., adl5505 Datasheet
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adl5505
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adl5505 Summary of contents
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... The input is internally ac-coupled and has a nominal input impedance of 500 Ω. The rms output is a linear-responding dc voltage with a conversion gain of 1.86 V/V rms at 900 MHz. The ADL5505 is a highly accurate, easy to use means of determining the rms of complex waveforms. It can be used for power measurements of both simple and complex waveforms ...
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... ADL5505 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 6 ESD Caution .................................................................................. 6 Pin Configuration and Function Descriptions ............................. 7 Typical Performance Characteristics ............................................. 8 Circuit Description ......................................................................... 13 RMS Circuit Description and Filtering ................................... 13 Filtering ........................................................................................ 13 Output Buffer .............................................................................. 13 Applications Information .............................................................. 14 REVISION HISTORY 4/10—Revision 0: Initial Version Basic Connections ...
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... ADL5505 Unit MHz Ω|| dBm dBm V/V rms dB/°C dB/°C Ω|| dBm dBm V/V rms dB/°C ...
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... ADL5505 Parameter RF INPUT (f = 1900 MHz) Input Impedance RMS Conversion 1 Dynamic Range ±0.25 dB Error 2 3 ±0.25 dB Error 3 ±1 dB Error 3 ±2 dB Error Maximum Input Level Minimum Input Level Conversion Gain 4 Output Intercept Output Voltage, High Input Power Output Voltage, Low Input Power Temperature Sensitivity ...
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... OUT −40°C < T < +85° signal at RFIN Rev Page Min Typ Max 80||0.42 < +85° −17 0.77 0.002 0.298 0.032 0.0103 0.0138 10 100 2 2.5 3.3 1.8 ADL5505 Unit Ω|| dBm dBm V/V rms dB/°C dB/° μs μ ...
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... ADL5505 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage VRMS RFIN Equivalent Power, Referred to 50 Ω Internal Power Dissipation θ (WLCSP) JA Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress Rating rating only ...
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... High resistive loads and low capacitance loads are recommended to preserve output swing and allow fast response. VPOS 1 4 VRMS RFIN 2 3 COMM ADL5505 TOP VIEW (BALL SIDE DOWN) Not to Scale Figure 3. Pin Configuration Rev Page ADL5505 ...
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... ADL5505 TYPICAL PERFORMANCE CHARACTERISTICS T = 25° 3 open; light condition ≤ 600 lux; 75 Ω input termination resistor; colors: black = +25°C, blue = −40° OUT red = +85°C; unless otherwise noted. 10 450MHz 900MHz 1900MHz 2600MHz 3500MHz 5000MHz 6000MHz 1 0.1 0.01 –25 –20 –15 –10 – ...
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... Devices at −40°C and +85°C; Frequency = 900 MHz –1 –2 – –25 Figure 15. Output Delta from +25°C Output Voltage for 50 Devices at −40°C and +85°C; Frequency = 1900 MHz Rev Page ADL5505 –20 –15 –10 – INPUT (dBm) –20 –15 –10 – ...
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... ADL5505 –1 –2 –3 –25 –20 –15 –10 –5 INPUT (dBm) Figure 16. Output Temperature Drift from +25°C Linear Reference for 50 Devices at −40°C, +25°C, and +85°C; Frequency = 2600 MHz –1 –2 –3 –25 –20 –15 –10 –5 INPUT (dBm) Figure 17. Output Temperature Drift from +25° ...
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... Figure 27. Supply Current vs. Input Level; Supplies = 2.5 V, 3.0 V, and 3.3 V; Frequency = 900 MHz; Temperatures = −40°C, +25°C, and +85°C = Open OUT Rev Page ADL5505 CW PICH, 4.7dB PICH + FCH (9.6kbps), 4.8dB CF PICH + FCH (9.6kbps) + DCCH, 6.3dB CF PICH + FCH (9.6kbps) + DCCH + SCH (153.6kbps), 7.6dB CF PICH + FCH (9.6kbps) + SCH (153.6kbps), 6.7dB – ...
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... ADL5505 400mV rms RF INPUT 250mV rms 160mV rms 70mV rms 4μs/DIV Figure 28. Output Response to Various RF Input Pulse Levels; Supply = 3.0 V; Frequency = 900 MHz; C OUT 400mV rms RF INPUT 250mV rms 160mV rms 70mV rms 10μs/DIV Figure 29. Output Response to Various RF Input Pulse Levels; Supply = 3.0 V; ...
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... CIRCUIT DESCRIPTION The ADL5505 employs two-stage detection. The critical aspect of this technical approach is the concept of first stripping the carrier to reveal the envelope and then performing the required analog computation of rms. RMS CIRCUIT DESCRIPTION AND FILTERING The rms processing is executed using a proprietary translinear technique ...
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... R is the input impedance of RFIN. IN ATTN is the desired attenuation factor in decibels. For example power amplifier with a maximum output power of 28 dBm is matched to the ADL5505 input at 5 dBm, then a −23 dB attenuation factor is required. At 900 MHz, the input resistance SERIES Thus, for an attenuation of −23 dB, a series resistance of approx- imately 4.87 kΩ ...
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... V and 2 there a reduction in the dynamic range as the input headroom decreases. Output Offset The ADL5505 has a ±1 dB error detection range of about 30 dB, as shown in Figure 10 to Figure 12 and Figure 16 to Figure 18. The error is referred to the best-fit line defined in the linear region of the output response (see the Device Calibration and Error Calculation section for more details). Below an input power of − ...
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... VRMS dc output. To reduce the effects of these low frequency components in the waveforms, some additional filtering is required. The output of the ADL5505 can be filtered directly by placing a capacitor between VRMS (Pin 4) and ground. The combination of the on-chip, 100 Ω output series resistance and the external shunt capacitor forms a low-pass filter to reduce the residual ac ...
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... ERROR (dB × log [(V Figure 41 shows a plot of the error at 25°C, the temperature at which the ADL5505 is calibrated. Note that the error is not 0; VRMS this is because the ADL5505 does not perfectly follow the ideal linear equation, even within its operating region. The error at the calibration points is, however, equal definition. Figure 41. Error from Linear Reference vs. Input at − ...
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... For example wireless transmitter, the accuracy of the high power amplifier (HPA) is most critical at or close to full power. The ADL5505 offers a tight error distribution in the high input power range, as shown in Figure 42. The high accuracy range, beginning around 6 dBm at 1900 MHz, offers ± ...
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... Power supply decoupling. Nominal supply decoupling of 0.1 μF and 100 pF. C9B R7B RF input interface. The 75 Ω resistor at R7B combines with the ADL5505 internal input impedance to give a broadband input impedance of around 50 Ω. C4B, R2B, R3B Output filtering. The combination of the internal 100 Ω output resistance and C4B produce a low-pass filter to reduce output ripple of the VRMS output ...
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... ORDERING GUIDE 1 Model Temperature Range ADL5505ACBZ-P7 –40°C to +85°C ADL5505ACBZ-P2 –40°C to +85°C ADL5505-EVALZ RoHS Compliant Part. ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 0.660 0.600 0.860 0.381 ...