Direct-Conversion Tuner IC
MAX2108
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
IM3 vs. CARRIER LEVEL
MAX2108 toc04
NOISE FIGURE vs. FREQUENCY
MAX2108 toc05
NOISE FIGURE vs. INSERTION GAIN
(RF TO BASEBAND)
MAX2108 toc06
80
70
60
IM3 (dBc)
15
14
13
12
NF (dB)
25
20
NF (dB)
V
GC
= 4V
5
950
1150
1350
1550
1750
20
22
24
26
28
30
32
34
36
38
RF FREQUENCY (MHz)
GAIN (dB)
40
30
20
SERIES IMPEDANCE (Ω)
10
0
-10
-20
-30
-40
-50
-60
-70
900
1100
1300
1500
1700
FREQUENCY (MHz)
IMAGINARY
REAL
50
40
30
20
10
0
-55 -50 -45 -40 -35 -30 -25 -20 -15 -10
RF INPUT LEVEL (dBm)
TWO-TONE FREQUENCY
SPACING EQUALS 2MHz
11
10
9
8
7
6
5
15
10
RF PORT SERIES IMPEDANCE
vs. FREQUENCY
30
SERIES IMPEDANCE (Ω)
20
10
0
-10
-20
-30
-40
900
1100
1300
1500
1700
FREQUENCY (MHz)
V
GC
= 4V
1900
2100
IMAGINARY
REAL
MAX2108 toc07
RF PORT SERIES IMPEDANCE
vs. FREQUENCY
MAX2108 toc08
40
V
GC
= 1V
1900
2100
LO PORT SERIES IMPEDANCE
vs. FREQUENCY
MAX2108 toc10
10
SERIES IMPEDANCE (Ω)
0
-10
-20
-30
-40
-50
-60
-70
900
1100
1300
1500
SINGLE-ENDED
1700
1900
2100
IMAGINARY
NORMALIZED BASEBAND GAIN (dB)
20
REAL
0
-5
0.1
1
10
100
1000
BASEBAND FREQUENCY (MHz)
FREQUENCY (MHz)
4
_______________________________________________________________________________________
MAX2108 toc11
30
5
NORMALIZED BASEBAND GAIN
vs. BASEBAND FREQUENCY
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
