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參數(shù)資料
| 型號： | OPA685U |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | Ultra-Wideband, Current-Feedback OPERATIONAL AMPLIFIER With Disable TM |
| 中文描述： | 超寬帶，電流反饋運(yùn)算放大器商標(biāo)使用禁用 |
| 文件頁數(shù)： | 11/28頁 |
| 文件大?。?/td> | 283K |
| 代理商： | OPA685U |
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11
OPA685
TYPICAL PERFORMANCE CURVES: V
S
= +5V
G = +8, R
F
= 348
, and R
L
= 100
, unless otherwise noted.
70
60
50
40
30
20
10
0
RECOMMENDED R
S
vs CAPACITIVE LOAD
Capacitive Load (pF)
10
100
R
S
)
OPA685
348
35.7
52.3
2.5k
2.5k
1k
V
I
+5V
0.1
μ
F
1k
load is optional
V
O
R
S
C
L
0.1
μ
F
24
21
18
15
12
9
6
3
0
–3
–6
Frequency (50MHz/div)
0
500MHz
250MHz
FREQUENCY RESPONSE vs CAPACITIVE LOAD
G
C
L
= 10pF
C
L
= 100pF
Optimized R
S
C
L
= 20pF
C
L
= 47pF
6
3
0
–3
–6
–9
–12
–15
–18
–21
–24
Frequency (100MHz/div)
0
1GHz
500MHz
NON-INVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
N
G = +8, R
F
= 348
G = +4, R
F
= 442
G = +16, R
F
= 162
See Figure 3
G = +2, R
F
= 487
V
O
= 500mVp-p
NON-INVERTING PULSE RESPONSE
Time (2ns/div)
I
1.6
1.2
0.8
0.4
0
–0.4
–0.8
–1.2
–1.6
G = +8
R
L
= 100
R
F
= 348
Output
Input
See Figure 3
V
O
=2Vp-p
6
3
0
–3
–6
–9
–12
–15
–18
–21
–24
Frequency (100MHz/div)
0
1GHz
500MHz
INVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
N
G = –2, R
F
= 464
G = –16, R
F
= 806
G = –8, R
F
= 402
G = –4, R
F
= 432
See Figure 4
V
O
= 500mVp-p
INVERTING PULSE RESPONSE
Time (2ns/div)
I
1.6
1.2
0.8
0.4
0
–0.4
–0.8
–1.2
–1.6
G = –8
R
L
= 100
R
F
= 402
Output
Input
See Figure 4
V
O
= 2Vp-p
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