Datasheet

OPA698
14
SBOS258D
www.ti.com
TYPICAL CHARACTERISTICS: V
S
= +5V
T
A
= +25°C, G = +2, R
F
= 402Ω, and R
L
= 500Ω to V
CM
= +2.5V, V
L
= V
CM
– 1.2V, V
H
= V
CM
+ 1.2V, unless otherwise noted.
HARMONIC DISTORTION vs LOAD RESISTANCE
Harmonic Distortion (dBc)
Load Resistance (Ω)
100
1k
–45
–50
–55
–60
–65
–70
–75
–80
3rd-Harmonic
See Figure 2
2nd-Harmonic
V
O
= 2V
PP
f = 5MHz
HARMONIC DISTORTION vs FREQUENCY
Harmonic Distortion (dBc)
Frequency (MHz)
0.5 1 10
20
–50
–55
–60
–65
–70
–75
–80
–85
–90
3rd-Harmonic
See Figure 2
2nd-Harmonic
V
O
= 2V
PP
R
L
= 500Ω
HARMONIC DISTORTION vs OUTPUT VOLTAGE
Harmonic Distortion (dBc)
Output Voltage Swing (V
PP
)
0.5 1.0 2.01.5
2.5
–65
–70
–75
–80
–85
–90
3rd-Harmonic
2nd-Harmonic
R
L
= 500Ω to V
S
/2
f = 5MHz
V
H
= V
OPP
/2 + V
CM
+ 0.5V
V
L
= –V
OPP
/2 + V
CM
– 0.5V
2-TONE, 3RD-ORDER
INTERMODULATION INTERCEPT
Intercept Point (+dBM)
Frequency (MHz)
010 403020
50
45
40
35
30
25
20
G = +2V/V
OPA698
402Ω
+2.5V
–2.5V
–V
S
+V
S
402Ω
50Ω
P
I
500Ω
P
O
HARMONIC DISTORTION NEAR LIMITING VOLTAGES
Harmonic Distortion (dBc)
Limit Voltages - 2.5V
0.9 1.0 1.1 1.6 1.71.4 1.51.2 1.3
1.8
–40
–45
–50
–55
–60
–65
–70
–75
–80
V
O
= V
CM
±1V
P
f = 5MHz
R
L
= 500Ω
3rd-Harmonic
2nd-Harmonic
LIMITER INPUT BIAS CURRENT vs BIAS VOLTAGE
Limiter Input Bias Current (µA)
Limiter Headroom (V)
0 0.5 21.51
2.5
100
75
50
25
0
–25
–50
–75
–100
Maximum Over Temperature
Minimum
Over Temperature
Limiter Headroom = +V
S
– V
H
=V
L
– (–V
S
)
Current = I
VH
or –I
VL