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參數(shù)資料
| 型號(hào)： | OPA685U |
| 元件分類： | 運(yùn)動(dòng)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)： | 8/28頁 |
| 文件大小： | 283K |
| 代理商： | OPA685U |
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8
OPA685
TYPICAL PERFORMANCE CURVES: V
S
=
±
5V
(CONT)
G = +8, R
F
= 402
, and R
L
= 100
, unless otherwise noted.
–15
–20
–25
–30
–35
–40
–45
–50
–55
–60
–65
ISOLATION CHARACTERISTICS vs FREQUENCY
Frequency (Hz)
10M
100M
1G
I
G = –8 (see Figure 2)
Reverse Isolation (S
12
)
G = +8 (see Figure 1)
Disabled Isolation (S
21
)
G = +8 (see Figure 1)
Reverse Isolation (S
12
)
20
15
10
5
Gain to Matched Load (dB)
6
12
8
9.5
11
NOISE FIGURE vs GAIN
N
Non-Inverting Gain with
50
Input Match
Non-Inverting Gain with
1:2 Input Transformer
(see Figure 5)
See Tables I, II, III
R
S
= 50
T
= +25
°
C
Optimized R
F
Inverting Gain with
50
Input Match
100
10
1
INPUT VOLTAGE AND CURRENT NOISE DENSITY
Frequency (Hz)
100
1k
10k
100k
1M
10M
C
√
H
V
√
H
Non-Inverting Input Current Noise
Inverting Input Current Noise
13pA/
√
Hz
19pA/
√
Hz
Input Voltage Noise
1.7nV/
√
Hz
–5
–10
–15
–20
–25
–30
–35
–40
–45
–50
–55
INPUT RETURN LOSS vs FREQUENCY (S
11
)
Frequency (Hz)
10M
100M
1G
R
G = +8
(see Figure 1)
G = –8
(see Figure 2)
VSWR < 1.2:1
–5
–10
–15
–20
–25
–30
–35
–40
–45
–50
–55
OUTPUT RETURN LOSS vs FREQUENCY (S
22
)
Frequency (Hz)
10M
100M
1G
R
G =
±
8
Without
Trim Cap
With
Trim Cap
VSWR < 1.2:1
OPA685
50
3.3pF
S
22
Trim Cap
50
40
30
20
10
Center Frequency (MHz)
0
50
150
250
200
100
TWO-TONE, 3rd-ORDER
INTERMODULATION INTERCEPT
O
OPA685
P
I
P
O
402
50
50
50
56.2
G = 12dB to matched load.
OPA685
P
I
P
O
402
50
50
50
G = 12dB to matched load.
G = +8
G = –8
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