LMH2832 Datasheet, PDF (15/46 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
Typical Characteristics (continued)
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
2.4
2.4
2.4
2.4
SCLK
SCLK
2
Output
2
2
Output
2
1.6
1.6
1.6
1.6
1.2
1.2
1.2
1.2
0.8
0.8
0.8
0.8
0.4
0.4
0.4
0.4
0
0
0
0
-0.4
-0.4
-0.4
-0.4
-0.8
-0.8
-0.8
-0.8
-1.2
-1.2
-1.2
-1.2
Time (10 ns/div)
Time (10 ns/div)
D029
D030
Figure 37. Gain Switching Response (A_V = 30 dB to 14 dB)
2.4
2.4
SCLK
2
Output
2
1.6
1.6
1.2
1.2
0.8
0.8
0.4
0.4
0
0
-0.4
-0.4
-0.8
-0.8
-1.2
-1.2
Time (10 ns/div)
D031
Figure 38. Gain Switching Response (A_V = 14 dB to 30 dB)
2.4
2.4
SCLK
2
Output
2
1.6
1.6
1.2
1.2
0.8
0.8
0.4
0.4
0
0
-0.4
-0.4
-0.8
-0.8
-1.2
-1.2
Time (10 ns/div)
D032
Figure 39. Gain Switching Response (A_V = 30 dB to 6 dB)
Figure 40. Gain Switching Response (A_V = 6 dB to 30 dB)
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