LMH2832 Datasheet, PDF (9/46 Pages) Texas Instruments – LMH2832 Fully Differential, Dual, 1.1-GHz, Digital Variable-Gain Amplifier

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LMH2832
SBOS709A – JULY 2016 – REVISED JULY 2016
7.7 Typical Characteristics
at T_A = 25°C, V_S+ = 5 V, R_i = 75 Ω, R_L = 150 Ω, maximum gain (1:2-Ω ratio transformer plus 30-dB DVGA gain), f = 5 MHz to
300 MHz, V_O converted to single-ended (SE) measurement with transformer, and default current setting (unless otherwise
noted); upon power-up, gain is set to mid-range
32
28
24
20
16
12
8
4
0
-4
-8
-12
-16
1
10
100
1000
Frequency (MHz)
V_O = 2 V_PP
8000
D001
Figure 1. Voltage Gain vs Frequency (1-dB Gain Steps)
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
-55
-60
1
10
100
1000 3000
Frequency (MHz)
D008
Differential input impedance (Z_IN) = 150 Ω, all gain settings
Figure 3. Input Return Loss vs Frequency
60
A_v = 30 dB
55
A_v = 22 dB
A_v = 14 dB
A_v = 6 dB
50
A_v = 2 dB
A_v = -2 dB
45
40
35
30
25
0 50 100 150 200 250 300 350 400 450 500 550 600
Frequency (MHz)
D002
P_OUT = 0 dBm per tone
Figure 5. OIP3 vs Frequency and Voltage Gain
31
30.8
30.6
30.4
30.2
30
29.8
29.6
29.4
29.2
29
28.8
-40 -20
0
20 40 60
Temperature (°C)
f = 50 MHz
f = 100 MHz
f = 200 MHz
f = 300 MHz
f = 400 MHz
f = 500 MHz
80 100 110
D025
Figure 2. Gain Flatness vs Temperature
0.1
0.2
Gain Matching Error (dB)
Phase Matching Error (°)
0.05
0.1
0
0
-0.05
-0.1
-0.1
-0.2
-9 -6 -3 0 3 6 9 12 15 18 21 24 27 30
Voltage Gain (dB)
D034
f = 200 MHz
Figure 4. Channel-to-Channel Mismatch Error
60
-40'C
55
27'C
90'C
105'C
50
45
40
35
30
25
0 50 100 150 200 250 300 350 400 450 500 550 600
Frequency (MHz)
D004
P_OUT = 0 dBm per tone
Figure 6. OIP3 vs Frequency and Temperature
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