TYPICAL CHARACTERISTICS: VS = ±5V
TA = 25°C, GD = 40V/V, RG = 50Ω, and RL = 400Ω, unless otherwise noted.
DIFFERENTIAL SMALL-SIGNAL
FREQUENCY RESPONSE
DIFFERENTIAL PERFORMANCE TEST CIRCUIT
3
+5V
DIS
0
–3
GD = +20V/V
OPA847
GD = +30V/V
GD = +40V/V
VO
VI
RF
GD
=
=
–6
RG
–5V
RF
RG
50Ω
GD = +50V/V
–9
RG
50Ω
VI
RL
VO
–12
–15
–18
RF
RG = 50Ω
O = 400mVPP
RF Adjusted
V
+5V
OPA847
10
100
1000
Frequency (MHz)
DIS
–5V
DIFFERENTIAL LARGE-SIGNAL
FREQUENCY RESPONSE
DIFFERENTIAL DISTORTION vs LOAD RESISTANCE
–55
–60
35
32
29
26
23
GD = 40V/V
VO = 4VPP
F = 5MHz
GD = 40V/V
–65
–70
VO = 400mVPP
–75
2nd-Harmonic
3rd-Harmonic
VO = 5VPP
–80
–85
VO = 8VPP
–90
–95
–100
–105
–110
1
10
100
Frequency (MHz)
1000
50
100 150 200 250 300 350 400 450 500
Resistance (Ω)
DIFFERENTIAL DISTORTION vs FREQUENCY
GD = 40V/V
DIFFERENTIAL DISTORTION vs OUTPUT VOLTAGE
–65
–75
–75
–80
GD = 40V/V
L = 400Ω
F = 5MHz
RL = 400Ω
R
V
O = 4VPP
–85
2nd-Harmonic
2nd-Harmonic
–85
–90
–95
–95
3rd-Harmonic
–100
–105
–110
3rd-Harmonic
–105
–115
1
10
Frequency (MHz)
100
1
10
Differential Output Voltage Swing (VPP
)
OPA847
SBOS251E
9
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