THS4551 Datasheet, PDF (11/70 Pages) Texas Instruments – Low-Noise, Precision, 150-MHz, Fully Differential Amplifier

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THS4551
SBOS778A – APRIL 2016 – REVISED AUGUST 2016
7.7 Typical Characteristics: (V_S+) – (V_S–) = 5 V
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
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)
D001
V_OUT = 20 mV_PP, see Figure 61 and Table 1 for resistor values
Figure 1. Small-Signal Frequency Response vs Gain
3
2
1
0
-1
-2
-3
-4
-5
V_OCM = 0.8 V
V_OCM = 1 V
-6
V_OCM = 1.5 V
-7
V_OCM = 2 V
-8
V_OCM = 3 V
V_OCM = 3.5 V
-9
100k
1M
10M
100M
Frequency (Hz)
D003
V_OUT = 20 mV_PP , see Figure 61 with V_OCM adjusted
Figure 3. Small-Signal Frequency Response vs V_OCM
3
2
1
0
-1
-2
-3
-4
-5
C_L = 10 pF, R_O = 97.6 :
-6
C_L = 47 pF, R_O = 49.9 :
-7
C_L = 100 pF, R_O = 32.4 :
-8
C_L = 470 pF, R_O = 10.0 :
C_L = 1000 pF, R_O = 4.7 :
-9
100k
1M
10M
100M
Frequency (Hz)
D005
V_OUT = 20 mV_PP at load, G = 1, two series R_O added at output
before capacitive load (C_L)
Figure 5. Small-Signal Frequency Response vs C_L
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
100k
V_OUT = 20 mVpp
V_OUT = 200 mVpp
V_OUT = 1 Vpp
V_OUT = 2 Vpp
V_OUT = 4 Vpp
V_OUT = 8 Vpp
1M
10M
Frequency (Hz)
See Figure 61
100M
D002
Figure 2. Frequency Response vs V_OUT
6
3
0
-3
-6
R_L = 50 :
R_L = 100 :
-9
R_L = 200 :
R_L = 500 :
R_L = 1000 :
-12
100k
1M
10M
100M
Frequency (Hz)
D004
V_OUT = 20 mV_PP, see Figure 61 with load resistance (R_L) adjusted
Figure 4. Small-Signal Frequency Response vs R_L
100
G = 1 V/V
90
G = 2 V/V
80
G = 5 V/V
G = 10 V/V
70
60
50
40
30
20
10
0
1
10
100
1000
Differential C_L (pF)
D006
Output resistance (R_O) is two series output resistors to a
differential C_L in parallel with a 1-kΩ load resistance
Figure 6. Recommended R_O vs C_L
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