ADL5391(Rev0) Ver la hoja de datos (PDF) - Analog Devices
Número de pieza
componentes Descripción
Lista de partido
ADL5391 Datasheet PDF : 16 Pages
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ADL5391
0
–5
BLEEDTHRU GAIN
–10
–15
SECOND HARMONIC GAIN
–20
–25
–30
–35
–40
–45
THIRD HARMONIC GAIN
–50
–55
–60
–65
10
100 200 300 400 500 600 700 800 900 1000
FREQUENCY (MHz)
Figure 18. Single-Ended (DC) ADL5391 Used as a Harmonic Generator
5dB PAD 53Ω
XM
21Ω
XIN
XP
74Ω
YM
53Ω YIN 21Ω
YP
74Ω 5dB PAD
10dB PAD
150Ω
WP
62Ω
WM
200Ω
Figure 19. Setup for Single-Ended Data
Use as a Detector
The ADL5391 can be used as a square law detector. When
amplitude squaring is performed, there are components of the
multiplier output that correlate to the signal bleedthrough and
second harmonic, as seen in Equation 4. However, as noted in
the Squaring and Frequency Doubling section, there is also a dc
component that is directly related to the offset and the squared
input magnitude. If a signal is split and feed into the X and Y
inputs and a low-pass filter were place on the output, the resulting
dc signal would be directly related to the square of the input
magnitude. The intercept of the response will shift slightly from
part to part (and over temperature) with the offset, but this can
be removed through calibration. Figure 20 shows the response
of the ADL5391 as a square law detector, Figure 21 shows the
error vs. the input power, and Figure 22 shows the
configuration used.
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
VIN (V rms)2
Figure 20. ADL5391 Used as Square Law Detector DC Output vs. Square of Input
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–0.2
–30 –25 –20 –15 –10 –5
0
PIN X (dBm)
5
10
Figure 21. ADL5391Used as a Square Law Detector Error vs. Power Input
C7
0.1µF
J6
YP
T3 TC1-1-13M
C18
0.1µF
C4
0.1µF
J8
XP
T2
TC1-1-13M
C20
0.1µF
R2
56.2Ω
R1
56.2Ω
11 XM
12 XP
13 YM
14 YP
WP 6
WM 5
R6
24.9Ω
R4
100Ω
R12
OPEN
R5
24.9Ω
T1
40µH
40µH
45nF
74µH
40nF
74µH
Figure 22. Schematic for ADL5391 Used as Square Law Detector
J2
WM
J1
WP
Rev. 0 | Page 12 of 16
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