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參數(shù)資料
| 型號： | OPA2381AIDRBR |
| 元件分類： | 跨阻放大器 |
| 英文描述： | Precision, Low Power, 18MHz Transimpedance Amplifier |
| 中文描述： | 精密，低功耗，18MHz的阻放大器 |
| 文件頁數(shù)： | 12/19頁 |
| 文件大?。?/td> | 489K |
| 代理商： | OPA2381AIDRBR |
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SBOS313B AUGUST 2004 REVISED NOVEMBER 2004
www.ti.com
12
120
100
80
60
40
20
0
20
Frequency (Hz)
T
100
10k
1k
1M
10M
100k
100M
3dB at 200kHz
See Figure 6a
C
DIODE
= 10pF
See Figure 6c
See Figure 6b
Figure 7. Transimpedance Gains for Circuits in
Figure 6
The effects of these circuit configurations on output
noise are shown in Figure 8 and on integrated output
noise in Figure 9. A 2-pole Butterworth filter (maximally
flat in passband) is created by selecting the filter values
using the equation:
C
F
R
F
2C
FILTER
R
FILTER
The circuit in Figure 6b rolls off at 20dB/decade. The
circuit with the additional filter shown in Figure 6c rolls
off at 40dB/decade, resulting in improved noise
performance.
400
300
200
100
0
Frequency (Hz)
O
μ
V
√
H
100
1k
10k
1M
10M
100k
100M
See Figure 6a
See Figure 6b
See Figure 6c
C
DIODE
= 10pF
Figure 8. Output Noise for Circuits in Figure 6
500
400
300
200
100
0
Frequency (Hz)
I
μ
V
100
10k
1k
1M
10M
100k
100M
C
DIODE
= 10pF
See Figure 6a
See Figure 6b
See Figure 6c
310
μ
Vrms
68
μ
Vrms
25
μ
Vrms
Figure 9. Integrated Output Noise for Circuits in
Figure 6
Figure 10 shows the effects of diode capacitance on
integrated output noise, using the circuit in Figure 6c.
For additional information, refer to
Noise Analysis of
FET Transimpedance Amplifiers
(SBOA060), and
Noise Analysis for High Speed Op Amps
(SBOA066),
available for download from the TI web site.
60
50
40
30
20
10
0
Frequency (Hz)
I
μ
V
1
100
10
10k
1k
1M
10M
100k
100M
See Figure 6c
C
= 100pF
C
= 50pF
C
= 20pF
C
= 1pF
C
= 10pF
37
μ
Vrms
28
μ
Vrms
25
μ
Vrms
23
μ
Vrms
56
μ
Vrms
Figure 10. Integrated Output Noise for Various
Values of C
DIODE
for Circuit in Figure 6c
(4)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA2381AIDRBRG4 | 功能描述:運算放大器 - 運放 Precision Lo-Power Transimpedance RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA2381AIDRBT | 功能描述:運算放大器 - 運放 Precision Lo-Power Transimpedance RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA2381AIDRBTG4 | 功能描述:運算放大器 - 運放 Precision Lo-Power Transimpedance RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA241PA | 功能描述:運算放大器 - 運放 Single-Supply MicroPower Oper Amp RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA241PA | 制造商:BURR-BROWN 功能描述:IC OP-AMP MICROPOWER |
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