Datasheet

100
10
1
0.1
0.01
Frequency (Hz)
1k 10k 100k 1M 10M 100M
Output Impedance
(
Ω
)
100
10
1
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
Capacitive Load (pF)
R
S
(
Ω
)
1 10 100 1k
< 0.5dB Peaking Targeted
8
7
6
5
4
3
2
1
0
−
1
−
2
−
3
Frequency (MHz)
Normalized Gain to Capacitive Load (dB)
1 10 100 300
C
L
= 1000pF
C
L
= 100pF
C
L
= 10pF
750Ω
R
S
1/2
OPA2830
V
I
V
O
50
Ω
1kΩ
(1)
C
L
750Ω
NOTE: (1) 1kΩis optional.
80
70
60
50
40
30
20
10
0
−
10
−
20
Frequency (Hz)
Open−Loop Gain (dB)
180
160
140
120
100
80
60
40
20
0
−
20
Open−Loop Phase (dB)
100 1k 10k 100k 1M 10M 100M 1G
20 log (A
OL
)
∠
(A
OL
)
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
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
OPA2830
www.ti.com .................................................................................................................................................. SBOS309D – AUGUST 2004 – REVISED AUGUST 2008
TYPICAL CHARACTERISTICS: V
S
= +5V (continued)
At T
A
= +25 ° C, G = +2V/V, R
F
= 750 Ω , R
L
= 150 Ω to V
S
/2, and input V
CM
= 2.5V, unless otherwise noted (see Figure 70 ).
INPUT VOLTAGE AND CURRENT NOISE DENSITY CLOSED-LOOP OUTPUT IMPEDANCE vs FREQUENCY
Figure 35. Figure 36.
RECOMMENDED R
S
vs CAPACITIVE LOAD FREQUENCY RESPONSE vs CAPACITIVE LOAD
Figure 37. Figure 38.
OPEN-LOOP GAIN AND PHASE VOLTAGE RANGES vs TEMPERATURE
Figure 39. Figure 40.
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