Datasheet

OPA846
6
SBOS250E
www.ti.com
TYPICAL CHARACTERISTICS: V
S
= ±5V (Cont.)
T
A
= 25°C, G = +10, R
F
= 453Ω, R
G
= 50Ω, and R
L
= 100Ω, unless otherwise noted.
10
1
INPUT VOLTAGE AND CURRENT NOISE
Frequency (Hz)
Voltage Noise (nV/√Hz)
Current Voise (pA/√Hz)
10 100 1k 10k 100k 1M 10M 100M
2.8pA/√Hz
Current Noise
1.2nV/√Hz
Voltage Noise
50
45
40
35
30
25
20
2-TONE, 3RD-ORDER INTERMODULATION INTERCEPT
Frequency (MHz)
Intercept Point (+dBm)
5101520253035404550
G = +10V/V
R
F
453Ω
R
S
50Ω
OPA846
P
IN
P
O
50Ω
R
L
50Ω
R
G
50Ω
+5V
50Ω Source
–5V
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
NONINVERTING GAIN FLATNESS TUNE
Frequency (MHz)
Deviation from 18.06dB Gain (0.1dB)
1 10 100 1000
NG = 8.0
NG = 8.5
NG = 10.0
NG = 9.5
NG = 9.0
V
O
= 200mV
PP
A
V
= +8
R
F
= 453Ω
R
G
= 64.9Ω
External Compensation
See Figure 9
3
2
1
0
–1
–2
–3
–4
–5
–6
LOW GAIN INVERTING BANDWIDTH
Frequency (MHz)
Normalized Gain (1dB)
1 10 100 1000
G = –6
G = –4
G = –2
G = –1
V
O
= 200mV
PP
R
F
= 400Ω
External Compensation
See Figure 5
100
10
1
RECOMMENDED R
S
vs CAPACITIVE LOAD
Capacitive Load (pF)
R
S
(Ω)
1 10 100 1000
G = +10V/V
23
20
17
14
11
8
FREQUENCY RESPONSE vs CAPACITIVE LOAD
Frequency (MHz)
Normalized Gain to Capacitive Load (dB)
1 10 100 1000
C = 22pF
C = 47pF
C = 100pF
C = 10pF
R
S
adjusted for capacitive load.
R
453Ω
R
S
OPA846
V
IN
V
O
50Ω
R
L
1kΩ
Power-supply
decoupling not shown.
C
L
R
G
50Ω
+5V
50Ω Source
–5V
(1kΩ is optional.)