參數(shù)資料
型號(hào)： MCP6271R
廠商： Microchip Technology Inc.
英文描述： 170 レA, 2 MHz Rail-to-Rail Op Amp
中文描述： 170レ甲，2 MHz的軌到軌運(yùn)算放大器
文件頁數(shù)： 17/34頁
文件大小： 1118K
代理商： MCP6271R
2006 Microchip Technology Inc.
DS21810E-page 17
MCP6271/1R/2/3/4/5
4.9.3.5
Second Order MFB with an Extra
Pole-Zero Pair
Figure 4-14
is a second order multiple feedback low-
pass filter with Chip Select. Use the FilterLab
software
from Microchip Technology Inc. to determine the R and
C values for op amp A’s second order filter. Op amp B
can be used to add a pole-zero pair using C
3
, R
6
and
R
7
.
FIGURE 4-14:
Feedback Low-Pass Filter with an Extra Pole-
Zero Pair.
Second Order Multiple
4.9.3.6
Second Order Sallen-Key with an
Extra Pole-Zero Pair
Figure 4-15
is a second order Sallen-Key low-pass
filter with Chip Select. Use the Filterlab
software from
Microchip to determine the R and C values for
op amp A’s second order filter. Op amp B can be used
to add a pole-zero pair using C
3
, R
5
and R
6
.
FIGURE 4-15:
Low-Pass Filter with an Extra Pole-Zero Pair and
Chip Select.
Second Order Sallen-Key
4.9.3.7
Capacitorless Second Order
Low-Pass filter with Chip Select
The low-pass filter shown in
Figure 4-16
does not
require external capacitors and uses only three
external resistors; the op amp’s GBWP sets the corner
frequency. R
1
and R
2
are used to set the circuit gain. R
3
is used to set the Q. To avoid gain peaking in the
frequency response, Q needs to be low (lower values
need to be selected for R
3
). Note that the amplifier
bandwidth varies greatly over temperature and
process. This configuration, however, provides a low
cost solution for applications with high bandwidth
requirements.
FIGURE 4-16:
Low-Pass Filter with Chip Select.
Capacitorless Second Order
A
CS
R
1
R
6
C
3
V
OUT
MCP6275
B
R
5
R
4
V
DD
R
7
C
1
R
3
R
2
V
IN
A
CS
R
5
C
3
V
OUT
MCP6275
B
R
6
R
4
R
3
V
IN
R
2
R
1
C
1
C
2
A
CS
R
3
R
2
V
OUT
MCP6275
B
V
REF
R
1
V
IN
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP6271RT-E/OT 功能描述:運(yùn)算放大器 - 運(yùn)放 Single 2 MHz OP E temp rvs pinout 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
MCP6271T-E/MS 功能描述:運(yùn)算放大器 - 運(yùn)放 Single 2MHz 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
MCP6271T-E/OT 功能描述:運(yùn)算放大器 - 運(yùn)放 Single 2 MHz OP E temp 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
MCP6271T-E/SN 功能描述:運(yùn)算放大器 - 運(yùn)放 Single 2MHz 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
MCP6272-E/MS 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual 2MHz 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
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