TYPICAL CHARACTERISTICS: VS = ±5V (Cont.)
TA = 25°C, G = +10, RF = 453Ω, RG = 50Ω, and RL = 100Ω, unless otherwise noted.
INPUT VOLTAGE AND CURRENT NOISE
2-TONE, 3RD-ORDER INTERMODULATION INTERCEPT
10
50
45
40
35
30
25
20
50Ω Source
G = +10V/V
+5V
OPA846
RS
50Ω
PO
PIN
50Ω
RL
50Ω
–5V
RF
453Ω
2.8pA/√Hz
Current Noise
RG
50Ω
1.2nV/√Hz
Voltage Noise
1
10
100
1k
10k
100k
1M
10M
100M
5
10
15
20
25
30
35
40
45
50
Frequency (Hz)
Frequency (MHz)
NONINVERTING GAIN FLATNESS TUNE
LOW GAIN INVERTING BANDWIDTH
O = 200mVPP
3
2
0.5
0.4
V
O = 200mVPP
V
NG = 8.0
NG = 8.5
AV = +8
R
R
RF = 400Ω
F = 453Ω
G = 64.9Ω
0.3
1
NG = 9.0
G = –6
G = –4
0.2
0
0.1
–1
–2
–3
–4
–5
–6
G = –2
G = –1
0
–0.1
–0.2
–0.3
–0.4
–0.5
NG = 9.5
NG = 10.0
External Compensation
See Figure 9
External Compensation
See Figure 5
1
10
100
1000
1
10
100
Frequency (MHz)
1000
Frequency (MHz)
RECOMMENDED RS vs CAPACITIVE LOAD
FREQUENCY RESPONSE vs CAPACITIVE LOAD
100
10
1
23
20
17
14
11
8
G = +10V/V
RS adjusted for capacitive load.
C = 10pF
C = 22pF
Power-supply
50Ω Source
VIN
decoupling not shown.
C = 47pF
C = 100pF
+5V
OPA846
RS
VO
50Ω
RL
1kΩ
CL
–5V
R
453Ω
(1kΩ is optional.)
RG
50Ω
1
10
100
1000
1
10
100
Frequency (MHz)
1000
Capacitive Load (pF)
OPA846
6
SBOS250C
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