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THS4551 Datasheet, PDF (14/70 Pages) Texas Instruments – Low-Noise, Precision, 150-MHz, Fully Differential Amplifier
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THS4551
SBOS778A – APRIL 2016 – REVISED AUGUST 2016
www.ti.com
7.8 Typical Characteristics: (VS+) – (VS–) = 3 V
at TA ≈ 25°C, VOCM pin = open, RF = 1 kΩ, RL = 1 kΩ, VOUT = 2 VPP, 50-Ω input match, G = 1 V/V, PD = VS+, 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
9
6
3
0
-3
G = 0.1 V/V
G = 1 V/V
-6
G = 2 V/V
G = 5 V/V
G = 10 V/V
-9
100k
1M
10M
100M
Frequency (Hz)
D019
VOUT = 20 mVPP, see Figure 61 and Table 1 for resistor values
Figure 19. Small-Signal Frequency Response vs Gain
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
VOCM = 0.8 V
-8
VOCM = 1 V
VOCM = 1.5 V
-9
100k
1M
10M
100M
Frequency (Hz)
D02013
VOUT = 20 mVPP, see Figure 61 with VOCM adjusted
Figure 21. Small-Signal Frequency Response vs VOCM
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
100k
CL = 10 pF, RO = 113 :
CL = 47 pF, RO = 54.9 :
CL = 100 pF, RO = 34.0 :
CL = 470 pF, RO = 10.5 :
CL = 1000 pF, RO = 5.1 :
1M
10M
100M
Frequency (Hz)
D023
VOUT = 20 mVPP, G = 1 V/V,
two series RO added at output before CL
Figure 23. Small-Signal Frequency Response vs CL
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
100k
VOUT = 20 mVpp
VOUT = 200 mVpp
VOUT = 1 Vpp
VOUT = 2 Vpp
VOUT = 4 Vpp
1M
10M
Frequency (Hz)
See Figure 61
100M
D020
Figure 20. Frequency Response vs VOUT
6
3
0
-3
-6
RL = 50 :
RL = 100 :
-9
RL = 200 :
RL = 500 :
RL = 1000 :
-12
100k
1M
10M
100M
Frequency (Hz)
D022
VOUT = 20 mVPP, see Figure 61 with RL adjusted
Figure 22. Small-Signal Frequency Response vs RL
120
110
G = 1 V/V
G = 2 V/V
100
G = 5 V/V
90
G = 10 V/V
80
70
60
50
40
30
20
10
0
1
10
100
1000
Differential CL (pF)
D024
Two RO at output to differential CL in parallel with a
1-kΩ load resistance
Figure 24. Recommended RO vs CL
14
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