Complete DBS Direct-Conversion Tuner ICs
with Monolithic VCOs
Typical Operating Characteristics (continued)
(MAX2116/MAX2118 EV kits, V CC = +4.75V to +5.25V, GC1 and GC2 set for maximum gain, V GND = 0, V IOUT = V QOUT = 800mV P-P
(MAX2116), loaded with 1k Ω V IOUT ± = V QOUT ± = 590mV P-P differential (DL = 0, MAX2118), V IOUT ± = V QOUT ± = 1V P-P differential (DL =
1, MAX2118), loaded with differential 2k Ω . Baseband LPF BW = 33MHz, f RFIN = 2175MHz. For default register values, see the Serial
Interface and Control Registers section. T A = 0°C to +85°C. Typical values are at V CC = +5V, T A = +25°C, unless otherwise noted.)
RF INPUT POWER vs. GC1
10
(BASEBAND OUTPUT = 800mV P-P )
0
BASEBAND GAIN vs. GC2
12.0
NOISE FIGURE vs. LO FREQUENCY
0
-10
-5
GC1 = 1.86V, RFIN = -40dBm,
f LO = 1550MHz, f CBB = 20MHz,
f BB = 1MHz
11.5
GC1 = 0.75V, GC2 = 0
+85 ° C
-20
-30
-10
11.0
-40
-50
-15
10.5
10.0
+25 ° C
-60
FROM TOP TO BOTTOM:
-20
9.5
0 ° C
-70
GC2 = 30, 25, 20, 15, 10, 5, 0
-80
-25
9.0
0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50
0
5
10
15
20
25
30
35
900
1100 1300 1500 1700 1900 2100 2300
GC1 (V)
NOISE FIGURE vs. GC2
GC2 (DECIMAL)
IIP3 vs. LO FREQUENCY
LO FREQUENCY (MHz)
IIP2 vs. GC2
13.5
13.0
GC1 = 0.75V, f LO = 1500MHz
17
15
13
GC1 ADJUSTED FOR FULL-SCALE BASEBAND
OUTPUT WITH P RFIN = -25dBm. FROM TOP
TO BOTTOM: GC2 = 0, 5, 10, 15, 20, 25, 30
26.0
25.5
25.0
GC1 = 0.75V, f LO = 2175MHz
12.5
12.0
11.5
11.0
10.5
10.0
11
9
7
5
3
1
-1
24.5
24.0
23.5
23.0
22.5
22.0
21.5
21.0
0
5
10
15
20
25
30
35
925
1125 1325 1525 1725 1925 2125 2325
0
5
10
15
20
25
30
GC2
RF INPUT RETURN LOSS
vs. FREQUENCY
LO FREQUENCY (MHz)
V TUNE vs. VCO FREQUENCY
GC2 (DECIMAL)
VCO_4: V TUNE vs. VCO FREQUENCY
21
20
19
18
17
16
15
14
13
12
Z 0 = 75 Ω
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
FROM TOP TO BOTTOM:
TEMPERATURE = +85 ° C, +55 ° C,
+25 ° C, 0 ° C
500
1000
1500
2000
2500
3000
2100 2600 3100 3600 4100 4600 5100 5600
3250
3350
3450
3550
3650
3750
3850
FREQUENCY (MHz)
VCO FREQUENCY (MHz)
VCO FREQUENCY (MHz)
_______________________________________________________________________________________
7
相关PDF资料
MAX2117EVKIT+ KIT EVAL FOR MAX2117
MAX2120EVKIT+ KIT EVAL FOR MAX2120
MAX2121EVKIT# KIT EVAL FOR MAX2121
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MAX2140EVKIT EVAL KIT MAX2140
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