LMH6401_16 Datasheet, PDF (13/48 Pages) Texas Instruments – LMH6401 DC to 4.5 GHz, Fully-Differential, Digital Variable-Gain Amplifier

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LMH6401
SBOS730A – APRIL 2015 – REVISED MAY 2015
Typical Characteristics (continued)
At T_A = 25°C, VS– = –2.5 V, VS+ = 2.5 V, VOCM = 0 V, R_LOAD = 200-Ω differential (R_{o(internal, diff)} = 20 Ω), V_O = 2 V_PPD, and A_V
= 26 dB, unless otherwise noted. Differential input and output, and input and output pins referenced to mid-supply, unless
otherwise noted. Measured using an EVM as discussed in the Parameter Measurement Information section.
14
40
-40°C
50 MHz
12
25°C
85°C
35
500 MHz
1000 MHz
2000 MHz
30
10
25
8
20
15
6
10
4
5
10
100
1000 2000
-6 -2
2
6 10 14 18 22 26
Frequency (MHz)
D014
Voltage Gain (dB)
D015
Figure 25. Noise Figure vs Frequency
0
-10
-20
-30
-40
-50
10
0.22
0.11
100
Frequency (MHz)
Scc21 / Sdd21
1000
5000
D025
Figure 27. CMRR vs Frequency
4
Vin
Vout
2
0
0
-0.11
-2
-0.22
-4
Time (1 nsec/div)
D029
Figure 26. Noise Figure vs Gain Settings
0
-10
-20
-30
-40
-50
-60
-70
-80
10
100
Frequency (MHz)
Sdc21/Sdd21
1000
5000
D026
Figure 28. Output Balance Error vs Frequency
1.4
4.2
1.2
Vin _3.6
1
Vout ₃
0.8
2.4
0.6
1.8
0.4
1.2
0.2
0.6
0
0
-0.2
-0.6
-0.4
-1.2
-0.6
-1.8
-0.8
-2.4
-1
-3
-1.2
-3.6
-1.4
-4.2
Time (1 nsec/div)
D030
Figure 29. Overdrive Recovery (A_V = 26 dB)
Figure 30. Overdrive Recovery (A_V = 10 dB)
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