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OPA2846 Datasheet, PDF (7/24 Pages) Texas Instruments – Dual, Wideband, Low-Noise, Voltage-Feedback Operational Amplifier | |||
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www.ti.com
TYPICAL CHARACTERISTICS: VS = ±5V (continued)
TA = 25°C, G = +10, RF = 453â¦, RG = 50â¦, and RL = 100â¦, unless otherwise noted.
OPA2846
SBOS274A âJUNE 2003 â REVISED MARCH 2004
INPUT VOLTAGE AND CURRENT NOISE
10
Current Noise
2.8pA/âHz
Voltage Noise
1.2nV/âHz
1
10 100 1k 10k 100k 1M 10M 100M
Frequency (Hz)
2âTONE, 3RDâORDER INTERMODULATION INTERCEPT
50
G = +10V/V
45
50⦠Source
+5V
P IN
1 /2
50⦠O PA2846
â 5V
RS
5 0â¦
PO
RL
50â¦
40
RF
453â¦
35
RG
50â¦
30
25
20
5
10 15 20 25 30 35 40 45 50
Frequency (MHz)
NONINVERTING GAIN FLATNESS TUNE
0.5
VO = 200mVPP
0.4 AV = +8
0.3 RF = 453â¦
0.2 RG = 64.9â¦
NG = 8.0
NG = 8.5
NG = 9.0
0.1
0
â0.1
â0.2
â0.3
NG = 9.5
NG = 10.0
External Compensation
â0.4 See Figure 9
â0.5
1M
10M
100M
1G
Frequency (Hz)
LOW GAIN INVERTING BANDWIDTH
3
VO = 200mVPP
2 RF = 400â¦
1
G = â6
0
G = â4
â1
G = â2
â2
G = â1
â3
â4
â5 External Compensation
See Figure 5
â6
1M
10M
100M
1G
Frequency (Hz)
RECOMMENDED RS vs CAPACITIVE LOAD
100
G = +10V/V
10
1
1
10
100
Capacitive Load (pF)
1000
FREQUENCY RESPONSE vs CAPACITIVE LOAD
23
RS adjusted for capacitive load.
C = 10pF
20
C = 22pF
17
50 ⦠So urce
Powerâ supply
+5V decoupling not show n.
V IN
14
11
1/2
50⦠O PA2846
â5V
R
453â¦
RG
50â¦
RS
VO
CL
RL
1kâ¦
(1k⦠is optional.)
8
1M
10M
100M
Frequency (Hz)
C = 47pF
C = 100pF
1G
7
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