THS4551 Datasheet, PDF (17/70 Pages) Texas Instruments – Low-Noise, Precision, 150-MHz, Fully Differential Amplifier

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THS4551
SBOS778A – APRIL 2016 – REVISED AUGUST 2016
7.9 Typical Characteristics: 3-V to 5-V Supply Range
at T_A ≈ 25°C, VOCM pin = open, R_F = 1 kΩ, R_L = 1 kΩ, V_OUT = 2 V_PP, 50-Ω input match, G = 1 V/V, PD = V_S+, single-ended
input, differential output, and input and output referenced to default midsupply for ac-coupled tests (unless otherwise noted);
see Figure 61 for a gain of 1-V/V test circuit
130
0
+5 V, Gain
+5 V, Phase
100
+3 V, Gain _-50
+3 V, Phase
70
-100
40
-150
10
-200
-20
-250
10 100 1k 10k 100k 1M 10M 100M 1G
Frequency (Hz)
D037
Simulated with a 1-kΩ differential load and 0.6-pF internal
feedback capacitors removed
Figure 37. Main Amplifier Differential Open-Loop Gain and
Phase vs Frequency
20
10
1
0.1
10
+5 V, En
+5 V, In
+3 V, En
+3 V, In
100
1k
10k
Frequency (Hz)
100k
1M
D039
Figure 39. Input Spot Noise vs Frequency
120
+5 V
115
+3 V
110
105
100
95
90
85
80
1k
10k
100k
1M
Frequency (Hz)
Common-mode input to differential output,
simulated with G = 1 V/V
10M
D041
Figure 41. CMRR vs Frequency
100
50
+5 V, G = 1 V/V
20
+5 V, G = 2 V/V
10
+5 V, G = 5 V/V
5
+3 V, G = 1 V/V
+3 V, G = 2 V/V
2
+3 V, G = 5 V/V
1
0.5
0.2
0.1
0.05
0.02
0.01
0.005
0.002
0.001
10k
100k
1M
10M
100M
Frequency (Hz)
D038
Simulated closed-loop differential output impedance
Figure 38. Closed-Loop Output Impedance vs Frequency
90
85
80
75
70
65
60
55
+5 V, SSOB
50
+5 V, 2-V_PP OB
45
+3 V, SSOB
+3 V, 2-V_PP OB
40
10k
100k
1M
10M
Frequency (Hz)
D040
Differential mode output to common-mode output,
simulated with G = 1 V/V
Figure 40. Output Balance vs Frequency
120
110
100
90
80
+5 V, VS+
70
+5 V, VS-
+3 V, VS+
+3 V, VS-
60
1k
10k
100k
1M
Frequency (Hz)
Single-ended to differential gain of 1,
PSRR simulated to differential output
10M
D042
Figure 42. Power-Supply Rejection Ratio vs Frequency
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