OPA2846_14 Datasheet, PDF (11/30 Pages) Texas Instruments – Dual, Wideband, Low-Noise, Voltage-Feedback Operational Amplifier

OPA2846
www.ti.com
SBOS274C −JUNE 2003 − REVISED AUGUST 2008
TYPICAL CHARACTERISTICS: V_S = ±5V, DIFFERENTIAL CONFIGURATION
TA = 25°C, G = +10, RF = 1kΩ, RG = 50Ω, and RL = 400Ω, unless otherwise noted.
DIFFERENTIAL PERFORMANCE TEST CIRCUIT
+5V
RG
50Ω
VI
RG
50Ω
OPA2846
RF
1kΩ
RF
1kΩ
Gain
=
RF ₌
R_G
VO
V_I
=
GD
RL
400Ω
VO
OPA2846
− 5V
DIFFERENTIAL LARGE−SIGNAL
FREQUENCY RESPONSE
29
G_D = +20V/V
R_L = 400Ω
26
23
20
17
14
1
V_O = 0.4V_PP
V_O = 8V_PP
V_O = 5V_PP
10
100
300
Frequency (MHz)
DIFFERENTIAL SMALL−SIGNAL
FREQUENCY RESPONSE
3
0
−3
R_L = 400Ω
V_O = 400mV_PP
−6
G_D = +20V/V
G_D = +10V/V
−9
G_D = +30V/V
−12
G_D = +40V/V
−15
−18
1
10
100
500
Frequency (MHz)
DIFFERENTIAL DISTORTION vs LOAD RESISTANCE
−55
−60
2nd−Harmonic
−65
V_O = 4V_PP
G = 20V/V
−70
−75
−80
−85
3rd−Harmonic
−90
−95
−100
−105
−110
−115
50 100 150 200 250 300 350 400 450 500
Resistance (Ω )
DIFFERENTIAL DISTORTION vs FREQUENCY
−65
G_D = +20V/V
R_L = 400Ω
−75
V_O = 4V_PP
2nd−Harmonic
−85
3rd−Harmonic
−95
−105
−115
1
10
100
Frequency (MHz)
DIFFERENTIAL DISTORTION vs OUTPUT VOLTAGE
−75
G = +20V/V
−80 f = 5MHz
−85 ^{RL = 400Ω}
2nd−Harmonic
−90
−95
−100
−105
−110
3rd−Harmonic
−115
1
10
Output Voltage Swing (V_PP)
11