OPA657 Datasheet, PDF (10/37 Pages) Texas Instruments – 1.6GHz, Low-Noise, FET-Input OPERATIONAL AMPLIFIER

OPA657
SBOS197F – DECEMBER 2001 – REVISED AUGUST 2015
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Typical Characteristics: V_S = ±5 V (continued)
At T_A = 25°C, G = 10 V/V, R_F = 453 Ω, and R_L = 100 Ω, unless otherwise noted.
100
-50
P_I
-60
50W OPA657
453W
-70
50W
10
Input Voltage Noise 4.8nV/ÖHz
-80
50W
P_O
20MHz
50W
15MHz
Input Current Noise 1.3fA/ÖHz
1
10
100
1k
10k 100k
1M
10M
Frequency (Hz)
-90
-100
-10 -8
10MHz
5MHz
-6 -4 -2 0 2 4 6 8
Single-Tone Load Power (dBm)
Figure 13. Input Current And Voltage Noise Density
110
100 CMRR
90
80 +PSRR
70
-PSRR
60
50
40
30
20
1k
10k
100k
1M
10M
100M
Frequency (Hz)
Figure 15. Common-Mode Rejection Ratio and Power-
Supply Rejection Ratio vs Frequency
100
10
For Maximally-Flat Frequency Response
1
10
100
1k
Capacitive Load (pF)
Figure 14. 2-Tone, 3rd-Order IMD Spurious
100
45
80
0
60
20log₁₀(A_OL)
–45
40
ÐA _OL
–90
20
–135
0
–20
–40
100
Aol Magnitude
Aol Phase
1k 10k 100k 1M 10M
Frequency (Hz)
100M
–180
–225
–270
1G
D001
Figure 16. Open-Loop Gain and Phase
23
20
17
14
11
V_I
8
5
2
1
50W OPA657
453W
50W
C_L = 22pF
C_L = 100pF
R_S
C_L
V_O
1kW
C_L = 10pF
10
100
500
Frequency (MHz)
Figure 17. Recommended R_S vs Capacitive Load
Figure 18. Frequency Response vs Capacitive Load
10
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