Datasheet

"#$
SBOS303C − JUNE 2004 − REVISED AUGUST 2008
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7
TYPICAL CHARACTERISTICS: V
S
= ±5V (continued)
R
F
= 402Ω, R
L
= 100Ω, and G = +2, unless otherwise noted.
100
10
1
INPUT VOLTAGE AND CURRENT NOISE
Frequency (Hz)
10 100 1k 10k 100k 1M 10M
Voltage Noise (nV/
√
Hz)
Current Noise (pA/
√
Hz)
Voltage Noise (2.5nV/
√
Hz)
Current Noise (1.7pA/
√
Hz)
100
10
1
RECOMMENDED R
S
vs CAPACITIVE LOAD
Capacitive Load (pF)
1 10 100 1000
R
S
(
Ω
)
0dB Peaking Targeted
90
80
70
60
50
40
30
20
10
0
CMRR AND PSRR vs FREQUENCY
Frequency (Hz)
Common−Mode Rejection Ratio (dB)
Power−Supply Rejection Ratio (dB)
1k 10k 100k 1M 10M 100M
CMRR
+PSRR
−
PSRR
50
45
40
35
30
25
20
15
TWO−TONE, 3RD−ORDER
INTERMODULATION INTERCEPT
Frequency (MHz)
Intercept Point (+dBm)
0 5 10 15 20 25 30
402
Ω
OPA820
P
I
P
O
50
Ω
200
Ω
402
Ω
8
7
6
5
4
3
2
1
0
−
1
−
2
−
3
FREQUENCY RESPONSE vs CAPACITIVE LOAD
Frequency (MHz)
Normalized Gain to Capacitive Load (dB)
110100400
C
L
= 10pF
C
L
= 22pF
C
L
=47pF
C
L
= 100pF
402
Ω
R
S
OPA820
V
I
V
O
50
Ω
1k
Ω
(1)
C
L
402
Ω
NOTE: (1) 1k
Ω
is optional.
80
70
60
50
40
30
20
10
0
−10
OPEN−LOOP GAIN AND PHASE
Frequency (Hz)
Open−Loop Gain (dB)
0
−20
−40
−60
−80
−100
−120
−140
−160
−180
Open−Loop Phase (
_
)
100 1k 10k 100k 1M 10M 100M 1G
20 log (A
OL
)
∠A
OL