OPA2830 Datasheet, PDF (17/43 Pages) National Semiconductor (TI) – Dual, Low-Power, Single-Supply, Wideband OPERATIONAL AMPLIFIER

OPA2830
www.ti.com.................................................................................................................................................. SBOS309D – AUGUST 2004 – REVISED AUGUST 2008
TYPICAL CHARACTERISTICS: V_S = +5V, Differential Configuration
At T_A = +25°C, R_F = 604Ω, and R_L = 500Ω differential (as shown in Figure 45), unless otherwise noted.
+5V
1.2kΩ _2.5V
1.2kΩ
1/2
0.1µF OPA2830
R_G
604Ω
V_I
R_G
604Ω
R_L V_O
G_D
=
604Ω
R_G
2.5V
1/2
OPA2830
Figure 45.
DIFFERENTIAL LARGE-SIGNAL FREQUENCY RESPONSE
9
6
V_O = 3V_PP
3
V_O = 2V_PP
0
−3
−6 _{GD = 2}
R_L = 500Ω
−9
1
V_O = 1V_PP
V_O = 0.2V_PP
10
Frequency (MHz)
Figure 47.
100 200
DIFFERENTIAL DISTORTION vs FREQUENCY
−30
G_D = 2
−40 ^VO ^{= 4V}PP
R_L = 500Ω
−50
3rd−Harmonic
−60
−70
2nd−Harmonic
−80
−90
−100
−110
1
10
100
Frequency (MHz)
Figure 49.
DIFFERENTIAL SMALL-SIGNAL FREQUENCY RESPONSE
3
G_D = 1
0
G_D = 2
−3
−6
−9
−12 _{VO = 200mVPP}
R_L = 500Ω
−15
1
G_D = 5
G_D = 10
10
Frequency (MHz)
100 200
Figure 46.
DIFFERENTIAL DISTORTION vs LOAD RESISTANCE
−40
−45
−50
−55
−60 ^GD ^{= 2}
−65
V_O = 4V_PP
f = 5MHz
−70
3rd−Harmonic
−75
−80
−85
2nd−Harmonic
−90
100 150 200 250 300 350 400 450 500
Resistance (Ω )
Figure 48.
DIFFERENTIAL DISTORTION vs OUTPUT VOLTAGE
−55 _{GD = 2}
−60 R_L = 500Ω
f = 5MHz
−65
3rd−Harmonic
−70
−75
−80
−85
2nd−Harmonic
−90
−95
−100
1
10
Output Voltage Swing (V_PP)
Figure 50.
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