Adjustable, High-Linearity,
SiGe Dual-Band LNA/Mixer ICs
Typical Operating Characteristics (continued)
(MAX232_ EV kit, V CC = +2.75V, f LNAINH = f MIXINH = 1960MHz, f LNAINL = f MIXINL = 881MHz, f LOHIN = 1750MHz, f LOLIN = 1091MHz
(digital modes), f LOLIN = 991MHz (FM mode), LO input power = -7dBm, 50 ? system, all measurements include matching component
losses but not connector and trace losses, T A = +25°C, unless otherwise noted.)
14
12
PCS-BAND HGHL MIXER NOISE
FIGURE vs. LO INPUT LEVEL
14
12
PCS-BAND HGLL MIXER NOISE
FIGURE vs. LO INPUT LEVEL
0
-5
CELLULAR-BAND LO BUFFER
OUTPUT LEVEL vs. INPUT LEVEL
10
8
HIGH SIDE LO
10
8
HIGH SIDE LO
-10
6
4
LOW SIDE LO
6
4
LOW SIDE LO
-15
T A = -45 ° C TO +85 ° C HIGH SIDE
-20
AND LOW SIDE LO
2
2
0
0
-25
-17
-12
-7
-2
3
-17
-12
-7
-2
3
-20
-10
0
10
LO INPUT LEVEL (dBm)
CELLULAR-BAND 2ND AND 3RD
HARMONICS vs. LO INPUT POWER
LO INPUT LEVEL (dBm)
PCS-BAND LO BUFFER
OUTPUT LEVEL vs. INPUT LEVEL
LO INPUT LEVEL (dBm)
0
-10
-20
-30
f LO = 1091MHz
3RD HARMONIC
0
-5
-10
-40
-50
2ND HARMONIC
-15
-20
T A = -45 ° C TO +85 ° C
HIGH SIDE AND LOW
SIDE LO
-60
-70
-25
-20
-10
0
10
-20
-10
0
10
LO INPUT LEVEL (dB)
PCS-BAND 2ND AND 3RD HARMONICS
LO BUFFER OUTPUT vs. INPUT LEVEL
LO INPUT LEVEL (dBm)
PCS-BAND MIXER
2 x 2 SPURIOUS REJECTION
0
-10
f LO = 1750MHz
-55
-57
-59
-20
-61
HGLL, WITHOUT LO DOUBLER
-30
-40
2ND HARMONIC
-63
-65
-67
-50
3RD HARMONIC
-69
HGHL, WITHOUT LO DOUBLER
-71
-60
-70
-73
-75
-20
-10
0
10
80
90
100
110
120
LO INPUT LEVEL (dB)
IF OUTPUT FREQUENCY (MHz)
12
______________________________________________________________________________________
相关PDF资料
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