Analog Devices AD8342 - Page 12

AD8342
Rev. 0 | Page 12 of 20
16
10
–15
5
05352-018
LO POWER (dBm)
NF (dB)
15
14
13
12
11
–13 –11 –9 –7 –5 –3 –1 1 3
NF = 10MHz
NF = 48MHz
NF = 90MHz
NF = 140MHz
Figure 27. Noise Figure vs. LO Power, f
RF
= 238 MHz
5.0
0
1.8
05352-024
R
BIAS
(kΩ)
GAIN (dB)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4
Figure 28. Gain vs. R
BIAS
, RF Frequency = 238 MHz, LO Frequency = 286MHz
61
45
1.8
05352-037
R
BIAS
(kΩ)
INPUT IP2 (dBm)
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4
59
57
55
53
51
49
47
Figure 29. Input IP2 vs. R
BIAS
, f
RF
= 238 MHz (Second RF = RF – 50MHz),
f
LO
= 286 MHz
30
0
11.8
12.8
05352-023
NOISE FIGURE (dB)
PERCENTAGE
25
20
15
10
5
11.9 12.0 12.1 12.2 12.3 12.4 12.5 12.6 12.7
NORMAL
MEAN = 12.25
STD. DEV. = 0.14
NF PERCENTAGE
Figure 30. Noise Figure Distribution, f
RF
= 238 MHz, f
LO
= 286 MHz
30
0
1.8 3.0
05352-015
R
BIAS
(k Ω )
NOISE FIGURE AND INPUT IP3 (dBm)
25
20
15
10
5
2.0 2.2 2.4 2.6 2.8
105
75
100
95
90
85
80
SUPPLY CURRENT (mA)
INPUT IP3
NOISE FIGURE
CURRENT
Figure 31. Noise Figure, Input IP3 and Supply Current vs. R
BIAS
,
f
RF1
= 238 MHz, f
RF2
= 239 MHz, f
LO
= 286 MHz
10
0
1.8
05352-036
R
BIAS
(k Ω )
INPUT P1dB (dBm)
9
8
7
6
5
4
3
2
1
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4
Figure 32. Input P1dB vs. R
BIAS
, f
RF
= 238 MHz, f
LO
= 286 MHz