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ADL5920ACPZ-R2 数据表(PDF) 22 Page - Analog Devices

部件名 ADL5920ACPZ-R2
功能描述  9 kHz to 7 GHz, Bidirectional RMS and VSWR Detector
PDF  26 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADL5920ACPZ-R2 数据表(HTML) 22 Page - Analog Devices

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ADL5920
Data Sheet
Rev. B | Page 22 of 26
DC-COUPLED OPERATION
The ADL5920 RFIN and RFOUT pins can be dc-coupled as
shown in Figure 43. However, to drive the inputs with signals
that are biased at 0 V, apply a negative supply of −2.5 V to the
two VNEG pins as shown in Figure 43. If dc-coupled operation
is required for the sake of applying low input frequencies,
connect capacitors to the CHPF and CHPR pins to reduce the
corner frequency of the offset compensation loops as previously
detailed. In addition, connect the DECL pin (Pin 12) to ground
to ensure that the specified directivity is achieved at low
frequencies.
REVERSE
PATH
RMS
DETECTOR
TEMPERATURE
SENSOR
1.4V
VREF
2.5V
FORWARD
PATH
RMS
DETECTOR
BIDIRECTIONAL BRIDGE
VTEMP
VRMSR
VREV
CRMSR
CHPR–
CHPR+
VNEG1
RFIN
TADJI
C13
1µF
C7
1µF
1kΩ
VTGT
VTGT
VREF
VOCM
VOCM
DECL
VRMSF
VFWD
EPAD
GND1
GND2
GND3
GND4
GND5
GND6
VPOS1
VPOS2
VPOS3
VDIFF+
C11
100pF
C9
0.1µF
C18
0.1µF
VDIFF
OUTPUT
C1
0.1µF
+5V
–2.5V
C6
100pF
C14
100pF
VDIFF–
CRMSF
CHPF–
CHPF+
VNEG2
RFOUT
5
ADL5920
C16
100pF
C5
0.1µF
PWDN/TADJS
3.6kΩ
R1
RFOP
0.1µF
C12
0.1µF
C8
RFIP
–2.5V
C17
100pF
C15
0.1µF
×1
25
28
1
24
27
29
30
21
23
22
16
12
19
15
20
5
10
18
32
3
2
26
31
4
9
6
7
11
17
8
13
14
Figure 43. Basic Connections for DC-Coupled Operation



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