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RF2460
Rev B5 060921
Instructions (Board loss, taking into consideration description in the W-CDMA schematic)
LNA
ICC LNA current=total current (VCC=LNA Gain=2.75)-total current (VCC=2.75; LNA Gain=0)
To measure ICC LNA only:
LNA Gain was switched between 0V and 2.75V, and record the delta current.
Mixer
ICC Mix and Bias Current=Total Current (VCC1=EN=VCC2=Mix Gain=2.75; LNA Gain=0)-total current (VCC1=EN=2.75;
Mix Gain=LNA Gain=VCC2=0)
LO signal should be present. VCC2 only affects LO current buffer and R6 doesn’t affect the mixer current.
LNA Gain, Noise Figure, and IIP3 versus ICC - LNA Only
(LNA High Gain)
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
1.00
3.00
5.00
7.00
9.00
11.00
13.00
15.00
ICC (mA)
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
1.80
2.00
Gain (dB)
IIP3 (dBm)
NF (dBm)
Mixer Gain, Noise Figure and IIP3 versus ICC - Mixer and
Bias Circuits (Mixer High Gain, LO=-7dBm)
-8.00
-6.00
-4.00
-2.00
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
6.00
6.50
7.00
7.50
8.00
8.50
9.00
9.50
10.00
ICC (mA)
0.00
2.00
4.00
6.00
8.00
10.00
12.00
Gain (dB)
IIP3 (dBm)
NF (dBm)
R6 versus ICC for LNA
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
1.0
3.0
5.0
7.0
9.0
11.0
13.0
15.0
ICC (mA)
R3 versus ICC for Mixer and Bias Circuits
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
6.0
6.5
7.07.5
8.08.5
9.09.5
10.0
ICC (mA)
W-CDMA
(See W-CDMA Application Schematic)
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