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參數(shù)資料
| 型號： | OPA4227UA2K5G4 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | High Precision, Low Noise OPERATIONAL AMPLIFIERS |
| 中文描述： | 高精度，低噪聲運算放大器 |
| 文件頁數(shù)： | 15/27頁 |
| 文件大小： | 847K |
| 代理商： | OPA4227UA2K5G4 |
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OPA227, 2227, 4227
OPA228, 2228, 4228
SBOS110A
15
www.ti.com
Without external compensation, the noise specification of
the OPA228 is the same as that for the OPA227 in gains of
5 or greater. With the additional external compensation, the
output noise of the of the OPA228 will be higher. The
amount of noise increase is directly related to the increase
in high frequency closed-loop gain established by the C
IN
/
C
F
ratio.
Figures 8 and 11 show the recommended circuit for gains
of +2 and –2, respectively. The figures suggest approximate
FIGURE 8. Compensation of the OPA228 for G =+2.
FIGURE 9. Large-Signal Step Response, G = +2, C
LOAD
=
100pF, Input Signal = 5Vp-p.
FIGURE 10. Small-Signal Step Response, G = +2, C
LOAD
=
100pF, Input Signal = 50mVp-p.
400ns/div
5
values for C
F
. Because compensation is highly dependent
on circuit design, board layout, and load conditions, C
F
should be optimized experimentally for best results. Fig-
ures 9 and 10 show the large- and small-signal step re-
sponses for the G = +2 configuration with 100pF load
capacitance. Figures 12 and 13 show the large- and small-
signal step responses for the G = –2 configuration with
100pF load capacitance.
200ns/div
2
FIGURE 11. Compensation for OPA228 for G = –2.
FIGURE 12. Large-Signal Step Response, G = –2, C
LOAD
=
100pF, Input Signal = 5Vp-p.
400ns/div
5
200ns/div
2
FIGURE 13. Small-Signal Step Response, G = –2, C
LOAD
=
100pF, Input Signal = 50mVp-p.
2k
OPA228
22pF
2k
100pF
2k
1k
2k
15pF
OPA228
2k
100pF
OPA228
OPA228
OPA228
OPA228
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA4227UAG4 | 功能描述:運算放大器 - 運放 High Prec Low Noise Oper Amplifier 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 |
| OPA4228 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High Precision, Low Noise OPERATIONAL AMPLIFIERS |
| OPA4228PA | 功能描述:運算放大器 - 運放 High Prec Low Noise Oper Amplifier 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 |
| OPA4228PA | 制造商:BURR-BROWN 功能描述:OP AMP QUAD LOW NOISE 4228 DIP14 |
| OPA4228PAG4 | 功能描述:運算放大器 - 運放 Hi Precision Low Noise Op 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 |
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