AD8302 Analog Devices, AD8302 Datasheet
AD8302
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AD8302 Summary of contents
Page 1
... The signal inputs are single-ended, allowing them to be matched and connected directly to a directional coupler. Their input impedance is nominally 3 kΩ at low frequencies. The AD8302 includes a phase detector of the multiplier type, but with precise phase balance, driven by the fully limited sig- nals appearing at the outputs of the two logarithmic amplifiers. ...
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... AD8302–SPECIFICATIONS resistors connected to INPA and INPB, for Phase measurement P Parameter Conditions OVERALL FUNCTION Input Frequency Range Gain Measurement Range P IN φ Phase Measurement Range IN Pin VREF, –40°C ≤ T Reference Voltage Output INPUT INTERFACE Pins INPA and INPB To AC Ground, f ≤ 500 MHz ...
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... INPA INPB ≤ +85° ± –30 dBm A INPA INPB = P = –5 dBm to –50 dBm INPB ≤ +85°C, Delta Phase = 90 Degrees A ≤ +85°C, Delta Phase = ± 30 Degrees ≤ +85°C A AD8302 Min Typ Max Unit 28.7 mV/dB 0.25 dB 0.25 dB 0.2 dB 143 ...
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... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD8302 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
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... VPOS 100mV 4k INPA(INPB LOG-AMP OFSA(OFSB) 10pF COMM VPOS VREF 10k 5k COMM + 750 – 2k VPOS 10k MSET (PSET) 10k ACTIVE LOADS COMM AD8302 VPOS 25 VMAG (VPHS) CLASS A-B CONTROL COMM VPOS MFLT (PFLT) 1.5pF COMM ...
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... AD8302 Typical Performance Characteristics noted. All references to dBm are referred to 50 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 –30 –25 –20 –15 –10 – MAGNITUDE RATIO – dB Ω 2.0 1900 1.8 1.6 1.4 2700 1.2 1.0 0.8 0.6 0.4 0.2 0 –30 –25 –20 –15 –10 – MAGNITUDE RATIO – dB 1.80 1.65 1.50 1.35 1.20 1.05 0.90 0.75 0.60 0.45 0.30 0.15 0 –30 –20 –10 0 MAGNITUDE RATIO – dB ° ...
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... AD8302 – MAGNITUDE RATIO – dB ° ° –40dBm –45dBm –30dBm –15dBm –15dBm –20 – MAGNITUDE RATIO – 5dB INPA INPB ...
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... AD8302 1.06 1.04 1. INPA INPB 1.00 0.98 0.96 0.94 0.92 0. INPA 0.88 0.86 0.84 0.82 0. 0.78 INPA INPB 0.76 0.74 0 200 400 600 800 1000 1200 1400 FREQUENCY – MHz 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 –1.2 –1.4 –1.6 –1.8 –40 – TEMPERATURE – –5 –10 –15 –20 –25 – ...
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... INPUT –10dBm 100 10 1k 10k 100k 1M FREQUENCY – Hz 10000 INPUT –50dBm 1000 INPUT –30dBm 100 INPUT –10dBm 10 1k 10k 100k 1M FREQUENCY – Hz 0.18 0.16 0.14 0.12 0.10 0.08 2700 1900 0.06 1200 900 0.04 100 0.02 0.00 –25 –20 –15 –10 – MAGNITUDE RATIO – dB AD8302 10M 100M 10M 100M ...
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... AD8302 1.8 100MHz 900MHz 1.6 1.4 190MHz 1.2 2200MHz 2700MHz 1.0 0.8 0.6 0.4 0.2 0.0 –180 –140 –100 –60 –20 20 PHASE DIFFERENCE – Degrees 1.80 1.62 1.44 1.26 1.08 0.90 0.72 0.54 0.36 0.18 1.11022e–16 –180 –150 –120 –90 –60 – PHASE DIFFERENCE – Degrees 1.80 1.62 1.44 1.26 1.08 0.90 0.72 0.54 0.36 0.18 0.00 –180 –150 –120 –90 –60 – PHASE DIFFERENCE – Degrees 1.80 1.62 1.44 1.26 1.08 0.90 0.72 0.54 0.36 0.18 1.11022e–16 ...
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... AD8302 MEAN +3 SIGMA MEAN –3 SIGMA TEMPERATURE – SIGMA –3 SIGMA ...
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... AD8302 9.5 9.7 9.9 10.1 10.3 10.5 VPHS – mV/Degree 10mV PER VERTICAL DIVISION 50ns HORIZONTAL ° ° 10mV PER VERTICAL DIVISION 2 s HORIZONTAL ° 10.7 10.9 11.1 10000 1000 100 10 ° ° 1.80 1.62 1.44 1.26 1.08 0.90 0.72 0.54 0.36 0.18 1.11022e–16 –180 –150 ° ° 10mV PER VERTICAL DIVISION 50ns HORIZONTAL ° ...
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... CAPACITANCE SHUNT Z (pF) 500 0 90 120 150 180 0 AD8302 P = –20dBm INPA P = –40dBm INPA P = –30dBm INPA –120 –90 –60 – 120 150 180 PHASE DIFFERENCE – Degrees P = – ...
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... AD8302 –2 –4 –6 –40 –30 –20 – TEMPERATURE – C 120 100 10k 100k 1M FREQUENCY – 1.74 10M 100M 1.76 1.78 1.80 1.82 1.84 1.86 1.88 VREF – V ...
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... V Φ relative phase in degrees. Structure The general form of the AD8302 is shown in Figure 2. The major blocks consist of two demodulating log amps, a phase detector, output amplifiers, a biasing cell and an output refer- ence voltage buffer. The log amps and phase detector process the high-frequency signals and deliver the gain and phase infor- mation in current form to the output amplifiers ...
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... BASIC CONNECTIONS Measurement Mode The basic function of the AD8302 is the direct measurement of gain and phase. When the output pins, VMAG and VPHS, are connected directly to the feedback setpoint input pins, MSET and PSET, the default slopes and center-points are invoked. This basic connection shown in Figure 4 is termed the measurement mode ...
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... This means that both gain and attenuation can be measured. The limits are determined by the minimum and maximum levels that each individual log amp can detect. In the AD8302, each log amp can detect inputs ranging from –73 dBV (223 µV, –60 dBm re: 50 Ω ...
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... MAG Comparator and Controller Modes The AD8302 can also operate in a comparator mode if used in the arrangement shown in Figure 10 where the DUT is the ele- ment to be evaluated. The VMAG and VPHS pins are no longer connected to MSET and PSET. The trip-point thresholds for ...
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... B A signals of the “Black Box” DUT. The attenuators ensure that the signal levels presented to the AD8302 fall within its dynamic range. From the discussion in the Dynamic Range section, the optimal choice places both channels at P enced to 50 Ω, which corresponds to –43 dBV. To achieve this, ...
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... The measurement accuracy can be compromised if board level details are not addressed. Minimize the physical distance between the series connected couplers since the extra path is defined as, length adds phase error to . Keep the paths from the couplers to the AD8302 as well matched as possible since any differences – Z )/( (16) ...
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... SW1 GSET R7 VREF R9 SW2 R3 R8 PSET PHASE C8 R6 Table III. Evaluation Board Configuration Options AD8302 Table II. P1 Pin Allocations 1 Common 2 VPOS 3 Common Default Condition Not Applicable 52.3 Ω (Size 0402 kΩ (Size 0603 Ω (Size 0603 Ω (Size 0603 100 pF (Size 0603 0.1 µ ...
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... AD8302 CHARACTERIZATION SETUPS AND METHODS The general hardware configuration used for most of the AD8302 characterization is shown in Figure 16. The characterization board is similar to the Customer Evaluation Board. Two reference-locked R & S SMT03 signal generators are used as the inputs to INPA and INPB, while the Gain and Phase outputs are monitored using both a TDS 744A oscilloscope with 10× ...
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... OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 14-Lead Thin Shrink SO Package (TSSOP) (RU-14) 0.201 (5.10) 0.193 (4.90 0.177 (4.50) 0.169 (4.30) 0.256 (6.50) 0.246 (6.25 PIN 1 0.006 (0.15) 0.0433 (1.10) MAX 0.002 (0.05) 8 0.0256 0.0118 (0.30) 0 SEATING 0.0079 (0.20) (0.65) 0.0075 (0.19) PLANE 0.0035 (0.090) BSC AD8302 0.028 (0.70) 0.020 (0.50) ...
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