Datasheet

OPA2691
7
SBOS224D
www.ti.com
TYPICAL CHARACTERISTICS: V
S
= ±5V (Cont.)
G = +2, R
F
= 402Ω, R
L
= 100Ω, unless otherwise noted (see Figure 1 for AC performance only).
100
10
1
INPUT VOLTAGE AND CURRENT NOISE DENSITY
Frequency (Hz)
100 1k 10k 100k 1M 10M
Current Noise (pA/√Hz)
Voltage Noise (nV/√Hz)
Noninverting Input Current Noise (12pA/√Hz)
Inverting Input Current Noise (15pA/√Hz)
Voltage Noise (1.7nV/√Hz)
–30
–40
–50
–60
–70
–80
–90
2-TONE, 3RD-ORDER
INTERMODULATION SPURIOUS
Single-Tone Load Power (dBm)
–8 –6 –4 –20246810
3rd-Order Spurious Level (dBc)
dBc = dB below carriers
50MHz
20MHz
10MHz
Load Power at Matched 50Ω Load
70
60
50
40
30
20
10
0
RECOMMENDED R
S
vs CAPACITIVE LOAD
Capacitive Load (pF)
1101001k
R
S
(Ω)
9
6
3
0
–3
–6
–9
Frequency (25MHz/div)
0 250MHz125MHz
FREQUENCY RESPONSE vs CAPACITIVE LOAD
Normalized Gain to Capacitive Load (dB)
1/2
OPA2691
R
S
V
IN
V
O
C
L
1kΩ
402Ω
402Ω
1kΩ is optional.
C
L
= 22pF
C
L
= 10pF
C
L
= 47pF
C
L
= 100pF
2.0
1.6
1.2
0.8
0.4
0
LARGE-SIGNAL DISABLE/ENABLE RESPONSE
Time (200ns/div)
Output Voltage (400mV/div)
6.0
4.0
2.0
0
V
DIS
(2V/div)
V
DIS
Output Voltage
V
IN
= +1V
DISABLED FEEDTHROUGH vs FREQUENCY
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
–95
–100
Frequency (MHz)
10.3 10 100
Feedthrough (5dB/div)
Forward
V
DIS
= 0
Reverse