參數(shù)資料
型號(hào): ALM-80210-TR1G
元件分類: 放大器
英文描述: 1600 MHz - 2700 MHz RF/MICROWAVE WIDE BAND MEDIUM POWER AMPLIFIER
封裝: 5 X 5 MM, 1.10 MM HEIGHT, HALOGEN FREE, MINIATURE PACKAGE-10
文件頁(yè)數(shù): 4/18頁(yè)
文件大?。?/td> 356K
代理商: ALM-80210-TR1G
12
Application Circuit Description and Layout
Figure 53. Demoboard schematic and layout
Bill of Materials
Circuit
Symbol
Size
Description
For 1.9GHz
For 2.5GHz
C1
0402
0.4pF
Murata
NA
C2
0402
27pF
Murata
100pF
Murata
C3
0402
100pF
Murata
100pF
Murata
C5
0603
2.2uF
Murata
2.2uF
Murata
C6
0402
0.1uF
Murata
0.1uF
Murata
C7
0402
15pF
Murata
3pF
Murata
L1
0402
NA
L4
0402
12nH
Toko
3.9nH
Toko
Note : For L1, please refer to Figure 54
ALM-80210 is a input fully matched and output pre-
matched product. The product requires 3 biasing points i.e.
Vdd (to bias up the PA), Vbias and Vctrl (for controlling the
attenuator circuitry). The Vdd is connected to the output
pin thru a RF choke, L4 (which isolates the inband signal
from the DC supply). The bypass capacitor (C5, C6 and C7)
helps to eliminate out of band low frequency signals. Dc
blocking capacitors (C2 and C3) are required for its input
and output, to isolate the supply voltage from succeeding
circuits. To improve input return loss, C1 is being use for
external tuning.
The external Inductor (L1), helps to stablize the attenuator
performance (by gain atness and change of phase) for
the frequency of interest as well as improving its dynamic
range.
ALM-80210’s gain is adjusted by supplying a voltage
thru Vctrl. For absolute dynamic range, Vctrl can operate
from 0.8 to 5V, but for best linearity, Vctrl above 1V is
recommended.
Figure 54. Phase vs Attenuation with and without External L1 at 1900MHz
-100
-80
-60
-40
-20
0
20
010
20
30
40
Attenuation (dB)
Phase
(Degree)
L1=27nH
L1=Open
C5
C6
C7
L4
C3
C1
C2
L1
A2 Rev2
Anggerik 5x5
VC
TL
GND
VBIAS
VDD
OUT
IN
L1
C2
C1
C5
C6
C7
L4
C3
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