MAX2112CTI 查看數據表（PDF） - Maxim Integrated
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MAX2112CTI Datasheet PDF : 19 Pages
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MAX2112
Complete, Direct-Conversion
Tuner for DVB-S2 Applications
Typical Operating Characteristics (continued)
(MAX2112 Evaluation Kit: VCC = +3.3V, TA = +25°C, baseband output frequency = 5MHz; VGC1 = +1.2V, default register settings
except BBG[3:0] = 1011.)
BASEBAND FILTER HIGHPASS
FREQUENCY RESPONSE
2
0
-2
-4
-6
-8
-10
-12
-14
100
1000
BASEBAND FREQUENCY (MHz)
10,000
PROGRAMMED f-3dB FREQUENCY
vs. MEASURED f-3dB FREQUENCY
45
LPF[7:0] = 12 + (f-3dB - 4MHz)/290kHz
40
35
30
25
20
15
10
5
0
0 5 10 15 20 25 30 35 40 45
PROGRAMMED f-3dB FREQUENCY (MHz)
BASEBAND FILTER 3dB FREQUENCY
vs. TEMPERATURE
1.0
0.8 NORMALIZED TO TA = +25°C
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
INPUT POWER vs. VGC1
10
0
ADJUST BBG[3:0] FOR 1VP-P BASEBAND
OUTPUT WITH
-10 PIN = -75dBm AND VGC1 = 0.5V
-20
TA = +25°C
-30
-40 TA = -40°C
-50
TA = +85°C
-60
-70
-80
0.5 1.0 1.5 2.0 2.5 3.0
VGC1 (V)
NOISE FIGURE vs. FREQUENCY
10.5
ADJUST BBG[3:0] FOR 1VP-P BASEBAND
10.0 OUTPUT WITH PIN = -75dBm
AND VGC1 = 0.5V
9.5
TA = +85°C
9.0
TA = +70°C
8.5
8.0
TA = +25°C
7.5
900 1100 1300 1500 1700 1900 2100 2300
FREQUENCY (MHz)
NOISE FIGURE vs. INPUT POWER
70
ADJUST BBG[3:0] FOR 1VP-P
60
BASEBAND OUTPUT WITH
PIN = -75dBm AND VGC1 = 0.5V.
50 fLO = 1500MHz
40
30
20
10
0
-80 -70 -60 -50 -40 -30 -20 -10 0
INPUT POWER (dBm)
OUT-OF-BAND IIP3 vs. INPUT POWER
30
SEE NOTE 4 ON PAGE 4 FOR CONDITIONS
20
10
0
-10
-20
-30
-80 -70 -60 -50 -40 -30 -20 -10 0
INPUT POWER (dBm)
IN-BAND IIP3 vs. INPUT POWER
30
SEE NOTE 3 ON PAGE 4 FOR CONDITIONS
20
10
0
-10
-20
-30
-40
-50
-60
-80 -70 -60 -50 -40 -30 -20 -10 0
INPUT POWER (dBm)
IIP2 vs. INPUT POWER
60
SEE NOTE 5 ON PAGE 4 FOR CONDITIONS
50
40
30
20
10
0
-10
-80 -70 -60 -50 -40 -30 -20 -10 0
INPUT POWER (dBm)
6
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