LMH2832 Datasheet, PDF (14/46 Pages) Texas Instruments – LMH2832 Fully Differential, Dual, 1.1-GHz, Digital Variable-Gain Amplifier

LMH2832
SBOS709A – JULY 2016 – REVISED JULY 2016
www.ti.com
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
0.15
6
f = 100 MHz
f = 100 MHz
f = 200 MHz
f = 200 MHz
0.1
f = 300 MHz
4
f = 300 MHz
0.05
2
0
0
-0.05
-2
-0.1
-4
-0.15
-9 -6 -3 0 3 6 9 12 15 18 21 24 27 30
Voltage Gain (dB)
D009
-6
-9 -6 -3 0 3 6 9 12 15 18 21 24 27 30
Voltage Gain (dB)
D010
Figure 31. Cumulative Gain Step Error vs Voltage Gain
200
R (:)
jX (:)
150
|Z| (:)
100
50
0
-50
-100
1
10
100
Frequency (MHz)
1000 2000
D036
Figure 32. Cumulative Phase Step Error vs Voltage Gain
2.4
2.5
Power Down Pin
2
Output
2
1.6
1.5
1.2
1
0.8
0.5
0.4
0
0
-0.5
-0.4
-1
Time (50 ns/div)
D026
Figure 33. Output Impedance vs Frequency
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)
D027
Figure 34. Power-Down Transition Response
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)
D028
Figure 35. Gain Switching Response (A_V = 30 dB to 22 dB)
Figure 36. Gain Switching Response (A_V = 22 dB to 30 dB)
14
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