Datasheet

0 4 8 12 16 20
-30
-35
-40
-45
-50
-55
-60
-65
-70
HD (dBc)
LADDER ATTENUATION (dB)
500 MHz
10 MHz
100 MHz
20 MHz
250 MHz
50 MHz
HG
0 4 8 12 16 20
-50
-55
-60
-65
-70
-75
-80
-85
HD (dBc)
LADDER ATTENUATION (dB)
LG
10 MHz
20 MHz
50 MHz
100 MHz
250 MHz
500 MHz
1
100 10k 1M
FREQUENCY (kHz)
1
10
100
100k
1k
10
CURRENT NOISE (pA/
Hz)
LG
HG
0 4 8 12 16
20
-30
-35
-40
-45
-50
-55
-60
-65
-70
-75
HD (dBc)
LADDER ATTENUATION (dB)
10 MHz
20 MHz
500 MHz
100 MHz
250 MHz
50 MHz
LG
0 5
10
20
15
0
2
4
8
6
10
12
14
16
18
20
22
24
26
28
LADDER ATTENUATION (dB)
NOISE FIGURE (dB)
f = 10 MHz
R
S
= 50: on each input
Preamp HG
Preamp LG
1
100 10k 1M
FREQUENCY (kHz)
0
1
10
1000
100k
1k
10
100
VOLTAGE NOISE (nV/
Hz)
HG, 20 dB
LG, 0 dB
HG, 0 dB
LG, 20 dB
LMH6518
SNOSB21C –MAY 2008–REVISED JULY 2013 www.ti.com
Typical Performance Characteristics (continued)
Unless otherwise specified, Input CM = 2.5V, V
CM
= 1.2V, V
CM AUX
= 1.2V, Single-ended input drive, V
CC
= 5V, V
DD
= 3.3V, R
L
= 100Ω differential (both Main & Auxiliary Outputs), V
OUT
= 0.7 V
PP
differential (both Main and Auxiliary Outputs), Main output
specification (Auxiliary is labeled “Auxiliary”), full bandwidth setting, gain = 18.8 dB (Preamp LG, 0 dB ladder attenuation), Full
Power setting
(1)
.
Noise Figure Input Voltage Noise
vs. vs.
Gain Frequency
Figure 20. Figure 21.
Input Current Noise HD2
vs. vs.
Frequency Ladder Attenuation
Figure 22. Figure 23.
HD3 HD2
vs. vs.
Ladder Attenuation Ladder Attenuation
Figure 24. Figure 25.
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