1. A voltage regulator is used in this circuit (U2) to drop the +9 V to a +5 V usable supply for the first internal amplifier. It is permissible to remove the
regulator and operate the 1
st
amplifier stage directly off of +5 V supply onto Test Point 1 (TP1). The use of a +5 V supply on the 1
st
amplifier stage
requires a dropping resistor of 6.8
Ω.
A +4.5 V supply can also be used to bypass the 6.8
1. A voltage regulator is used in this circuit (U2) to drop the +9 V to a +5 V usable supply for the first internal amplifier. It is permissible to remove the
regulator and operate the 1
st
amplifier stage directly off of +5 V supply onto Test Point 1 (TP1). The use of a +5 V supply on the 1
st
amplifier stage
requires a dropping resistor of 6.8
Ω.
A +4.5 V supply can also be used to bypass the 6.8
1. A voltage regulator is used in this circuit (U2) to drop the +9 V to a +5 V usable supply for the first internal amplifier. It is permissible to remove the
regulator and operate the 1
st
amplifier stage directly off of +5 V supply onto Test Point 1 (TP1). The use of a +5 V supply on the 1
st
amplifier stage
requires a dropping resistor of 6.8
Ω.
A +4.5 V supply can also be used to bypass the 6.8
Ω
and can be applied to Test Point 2 (TP2).
S-Parameters
Wideband S-Parameters
S22
27
26
Gain (dB)
S21
S11
0
-5
S11, S22 (dB)
30
20
Gain (dB)
25
24
23
22
2050
-10
-15
-20
-25
2250
10
0
-10
-20
-30
0
500
1000 1500 2000 2500 3000
Frequency (MHz)
ACLR vs. Channel Power
S21
S11
S22
2100
2150
2200
Frequency (MHz)
Noise Figure
5
Noise Figure (dB)
Output IP3
48
46
OIP3 (dBm)
-40
-45
-50
-55
-60
3GPP W-CDMA, Test Model 1+64 DPCH, ±5 MHz offset, 2140 MHz
4
3
2
1
0
2000
44
42
40
38
2050
2100
Frequency (MHz)
2150
2200
6
8
10
12
14
16
ACLR (dBc)
Output Power per tone (dBm)
14
15
16
17
18
Output Channel Power (dBm)
19
Specifications and information are subject to change without notice
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[i=s]This post was last edited by paulhyde on 2014-9-15 03:28[/i] [align=center][color=#000][b][size=5]Share ADS9854 information, prepare for 2013 Renesas Cup[/size][/b][/color][/align] [color=#000000...