Datasheet

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SBOS263F − AUGUST 2004 − REVISED AUGUST 2008
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12
TYPICAL CHARACTERISTICS: V
S
= +5V (continued)
At T
A
= 25°C, G = +2, R
F
= 750Ω, R
L
= 150Ω to V
S
/2, and input V
CM
= 2.5V, unless otherwise noted (see Figure 1).
100
10
1
INPUT VOLTAGE AND CURRENT NOISE DENSITY
Frequency (Hz)
10 100 1k 10k 100k 1M 10M
Voltage Noise (nV/
√
Hz)
Current Noise (pA/
√
Hz)
Voltage Noise
(9.2nV/
√
Hz)
Current Noise
(3.5pA/
√
Hz)
130
120
110
100
90
80
70
60
50
40
30
20
10
RECOMMENDED R
S
vs CAPACITIVE LOAD
Capacitive Load (pF)
R
S
(
Ω
)
1 10 100 1k
0dB Peaking Targeted
80
70
60
50
40
30
20
10
0
−
10
−
20
OPEN−LOOP GAIN AND PHASE
Frequency (Hz)
Open−Loop Gain (dB)
0
−
20
−
40
−
60
−80
−
100
−
120
−
140
−
160
−
180
−
200
Open−Loop Phase (
_
)
100 1k 10k 100k 1M 10M 100M 1G
20 log (A
OL
)
∠(A
OL
)
100
10
1
0.1
0.01
CLOSED−LOOP OUTPUT IMPEDANCE vs FREQUENCY
Frequency (Hz)
Output Impedance (
Ω
)
1k 10k 100k 1M 10M 100M
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)
1 10 100 300
C
L
= 1000pF
C
L
= 100pF
C
L
= 10pF
750
Ω
R
S
OPA830
V
I
V
O50Ω
1kΩ
(1)
C
L
750Ω
NOTE: (1) 1k
Ω
is optional.
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
−
0.5
−
1.0
VOLTAGE RANGES vs TEMPERATURE
Ambient Temperature (10
_
C/div)
−
50 0 50 110
Voltage Range (V)
Most Positive Output Voltage
Most Positive Input Voltage
Least Positive Output Voltage
Least Positive Input Voltage
R
L
=150
Ω