Datasheet
0 2 4 6 8 10 12 14 16 18 20
0.5
0.7
0.9
1.1
1.3
1.5
1.7
1.9
2.1
2.3
2.5
LADDER ATTENUATION (dB)
INPUT REFERRED (nV/
Hz)
0
20
40
60
80
100
OUTPUT REFERRED
(
nV
/
Hz)
Input Referred
Output Referred
f = 10 MHz
Preamp HG
INPUT REFERRED (nV/
Hz)
OUTPUT REFERRED
(
nV
/
Hz)
0 2 4 6 8 10 12 14 16
18
20
0
2
4
6
8
10
12
14
16
18
LADDER ATTENUATION (dB)
0
5
10
15
20
25
30
35
40
45
Input Referred
Output Referred
f = 10 MHz
Preamp LG
1
10 100 1000
FREQUENCY (MHz)
-15
-10
-5
0
5
10
15
PHASE (°)
0
3
6
9
12
15
18
GROUP DELAY
(
ns
)
Linear Phase Deviation
Group Delay
1
10 100 1G
FREQUENCY (MHz)
-90
-80
-70
-60
-50
-40
-30
-20
-10
GAIN (dB)
Phase
Gain
LG, 0 dB
-7
-6
-5
-4
-3
-2
-1
0
1
PHASE
(
°
)
10
100 1G
-6
-5
-4
-3
-2
-1
0
1
NORMALIZED GAIN (dB)
FREQUENCY (MHz)
650 MHz Filter
LG, 0 dB
HG, 20 dB
HG, 0 dB
LG, 20 dB
0 200 400 600 800 1000
-300
-250
-200
-150
-100
-50
0
PHASE (°)
FREQUENCY (MHz)
650 MHz Filter
LG, 0 dB
LG, 20 dB
HG, 0 dB
HG, 20 dB
LMH6518
www.ti.com
SNOSB21C –MAY 2008–REVISED JULY 2013
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)
.
Response Phase
vs. vs.
Gain Gain
Figure 14. Figure 15.
Balance Error Linear Phase Deviation and Group Delay
Figure 16. Figure 17.
Noise Noise
vs. vs.
Ladder Attenuation Ladder Attenuation
Figure 18. Figure 19.
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