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ADL5523ACPZ-R7 Datasheet(PDF) 16 Page - Analog Devices

Part No. ADL5523ACPZ-R7
Description  Low Noise Amplifier
Download  21 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADL5523ACPZ-R7 Datasheet(HTML) 16 Page - Analog Devices

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ADL5523
Data Sheet
Rev. C | Page 16 of 21
BASIC CONNECTIONS
The basic connections for operating the ADL5523 are shown in
Figure 53. Capacitor C5 provides the power supply decoupling.
Inductor L1 (Coilcraft 0403HQ or 0402HP series) and Capacitor C1
(Murata High-Q GJM series or equivalent) provide the input
impedance matching, and the output impedance matching is
provided by either L2 or C3. Resistor R1 is used to set the supply
current, and the value of R1 is indirectly proportional to the
supply current (that is, increasing the value of R1 reduces the
supply current). The recommended external components for
selected frequencies are listed in Table 7.
For 5 V applications where the input power exceeds the input
compression point of approximately 7 dBm, insert a series
resistor (R2) of at least 8 Ω, with a high power rating (0.2 W
minimum), on the VPOS line to protect the device from the
input power overdrive. In this case, reduce Resistor R1 from
1.3 kΩ to 600 Ω to keep the supply current at around 60 mA.
With R2 = 8.2 Ω (Susumu RP1608S-8R2-F) and R1 = 600 Ω, the
gain and noise figure for the ADL5523 are mostly unchanged.
Table 6 lists OIP3 and P1dB at selected frequencies. For 3 V
power supply applications, a series resistor is not necessary for
the expected input overdrive powers up to 20 dBm.
VBIAS
RFIN
NC
NC
RFOUT
VPOS
NC
NC
Z1
RFIN
RFOUT
C1
L1
TR2
TR1
L2
C3
C5
100nF
W1
VPOS
GND
R1
R2
ADL5523
1
2
3
4
8
7
6
5
Figure 53. ADL5523 Basic Connections
Table 6. ADL5523 Performance at VPOS = 5 V, 25°C with
R2 = 8.2 Ω and R1 = 600 Ω
Frequency
(MHz)
Noise
Figure (dB)
Gain
(dB)
P1dB
(dBm)
OIP3 (dBm)
(POUT = 0 dBm)
900
0.8
21.5
20.3
32.5
1950
1.0
17.0
20.7
34.0
2600
0.9
13.5
20.5
35.0
3500
1.0
11.3
20.1
35.0


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