OPA830-EP_15 Datasheet, PDF (14/36 Pages) Texas Instruments – Low-Power, Single-Supply, Wideband Operational Amplifier

OPA830-EP
SBOS655 – MARCH 2014
Typical Characteristics V_S = +5V (continued)
At T_A = 25°C, G = +2, R_F = 750Ω, and R_L = 150Ω to V_S/2 and input V_CM = 2.5V, unless otherwise noted.
100
100
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10
Voltage Noise
(9.2nV/√Hz)
10
1
Current Noise
(3.5pA/√Hz)
1
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
0.1
0.01
1k
10k
100k
1M
10M
100M
Frequency (Hz)
Figure 35. Input Voltage and Current Noise Density
130
120
110
100
90
80
70
60
50
40
30
20
10
1
10
100
1k
Capacitive Load (pF)
0dB Peaking Targeted
Figure 37. Recommended R_S vs Capacitive Load
80
70
60
50
40
30
20
10
0
−10
−20
100 1k 10k
R_L = 150Ω
20 log (A_OL)
100k 1M 10M
Frequency (Hz)
0
−20
−40
−60
−80
∠ (A_OL)
−100
−120
−140
−160
−180
−200
100M 1G
Figure 39. Open−Loop Gain and Phase
Figure 36. Closed−Loop Output Impedance vs Frequency
8
7
6
5
4
3
2
1
V_I
0
−1
−2
−3
1
C_L = 1000pF
C_L = 10pF
C_L = 100pF
50Ω OP A830
750Ω
R_S
V_O
CL 1kΩ(1)
750Ω
NOTE: (1) 1kΩis optional.
10
Frequency (MHz)
100
300
Figure 38. Frequency Response vs Capacitive Load
5.0
4.5
Most Positive Output Voltage
4.0
3.5
3.0
Most Positive Input Voltage
2.5
2.0
1.5
1.0
0.5
Least Positive Output Voltage
0
−0.5
−1.0
−50
Least Positive Input Voltage
0
50
110
Ambient Temperature (10 C/div)
R_L = 150Ω
Figure 40. Voltage Ranges vs Temperature
14
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