LMH6401_16 Datasheet, PDF (9/48 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
7.7 Typical Characteristics
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.
30
MaxGain
25
20
15
10
5
0
-5
-10
10
100
1000
Frequency (MHz)
10000 24000
D013
30
-40°C
25°C
29
85°C
28
27
26
25
24
10
100
1000
Frequency (MHz)
10000
D021
Figure 1. Voltage Gain vs Frequency (1-dB Gain Steps)
40
20
0
-20
-40
-60
-80
-100
50
Sdd21
Sdd12
Sdd11
Sdd22
100
1000
Frequency (MHz)
10000
D027
0
-5
-10
-15
-20
-25
-30
-35
-40
-6
Figure 2. Maximum Gain vs Temperature
200 MHz
500 MHz
1000 MHz
2000 MHz
-2
2
6 10 14 18 22 26
Voltage Gain (dB)
D042
Figure 3. S-Parameters vs Frequency
10
0
-10
-20
-30
-40
10
No Cap
1 pF
2.4pF
4.7pF
10pF
100
1000
Frequency (MHz)
10000
D024
Figure 5. Frequency Response vs Capacitive Load
Figure 4. Input Return Loss vs Gain Settings
50
45
40
35
30
25
20
10
Gain = 26dB
Gain = 18dB
Gain = 10dB
Gain = 2dB
100
Frequency (MHz)
P_O = –2 dBm per tone
1000 2000
D018
Figure 6. Output IP3 vs Frequency and Gain Settings
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