參數(shù)資料
型號(hào)： MCP6275
廠商： Microchip Technology Inc.
英文描述： 170 UA, 2 MHz Rail-to-Rail Op Amp
中文描述： 170聯(lián)合航空表示，2 MHz的軌到軌運(yùn)算放大器
文件頁數(shù)： 13/34頁
文件大小： 596K
代理商： MCP6275
2004 Microchip Technology Inc.
DS21810D-page 13
MCP6271/2/3/4/5
FIGURE 4-6:
for Inverting Gain.
Example Guard Ring Layout
1.
For Inverting Gain and Transimpedance
Amplifiers (convert current to voltage, such as
photo detectors):
a.
Connect the guard ring to the non-inverting
input pin (V
IN
+). This biases the guard ring
to the same reference voltage as the op
amp (e.g., V
DD
/2 or ground).
b.
Connect the inverting pin (V
IN
–) to the input
with a wire that does not touch the PCB
surface.
Non-inverting Gain and Unity-Gain Buffer:
a.
Connect the non-inverting pin (V
IN
+) to the
input with a wire that does not touch the
PCB surface.
b.
Connect the guard ring to the inverting input
pin (V
IN
–). This biases the guard ring to the
common mode input voltage.
2.
4.8
Application Circuits
4.8.1
ACTIVE FULL-WAVE RECTIFIER
The MCP6271/2/3/4/5 family of amplifiers can be used
in applications such as an Active Full-Wave Rectifier or
an Absolute Value circuit, as shown in Figure 4-7. The
amplifier and feedback loops in this active voltage
rectifier circuit eliminate the diode drop problem that
exists in a passive voltage rectifier. This circuit behaves
as a follower (the output follows the input) as long as
the input signal is more positive than the reference
voltage. If the input signal is more negative than the
reference voltage, however, the circuit behaves as an
inverting amplifier. Therefore, the output voltage will
always be above the reference voltage, regardless of
the input signal.
FIGURE 4-7:
Active Full-wave Rectifier.
The design equations give a gain of ±1 from V
IN
to
V
OUT
, and produce rail-to-rail outputs.
Guard Ring
V
SS
V
IN
–
V
IN
+
–
+
–
+
V
IN
V
OUT
V
REF
V
REF
R
1
R
3
R
4
R
5
R
2
Op Amp A
Op Amp B
D
1
D
2
V
REF
V
REF
time
time
Input
Output
R
5
R
R
4
2
R
3
------------
=
R
1
R
2
R
3
=
=
1/2
MCP6272
1/2
MCP6272
R
4
R
3
<
1
V
V
REF
V
SS
–
---------------------------
–
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP6275-E/MS 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Connected 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
MCP6275-E/P 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Connected 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
MCP6275-E/SN 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Connected 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
MCP6275T-E/MS 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Connected 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
MCP6275T-E/SN 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Connected 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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