參數(shù)資料
型號(hào)： MCP6285
廠商： Microchip Technology Inc.
英文描述： 450 UA, 5 MHz Rail-to-Rail Op Amp
中文描述： 450聯(lián)合航空表示，5兆赫軌到軌運(yùn)算放大器
文件頁數(shù)： 13/32頁
文件大?。?/td> 580K
代理商： MCP6285
2004 Microchip Technology Inc.
DS21811D-page 13
MCP6281/2/3/4/5
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
SALLEN-KEY HIGH-PASS FILTER
The MCP6281/2/3/4/5 op amps can be used in active-
filter applications. Figure 4-7 shows a second-order
Sallen-Key high-pass filter with a gain of 1. The output
bias voltage is set by the V
DD
/2 reference, which can
be changed to any voltage within the output voltage
range.
FIGURE 4-7:
Sallen-Key High-Pass Filter.
This filter, and others, can be designed using
Microchip’s FilterLab
software, which is available on
our web site (www.microchip.com).
4.8.2
INVERTING MILLER INTEGRATOR
Analog integrators are used in filters, control loops and
measurement circuits. Figure 4-8 shows the most
common implementation, the inverting Miller integrator.
The non-inverting input is at V
DD
/2 so that the op amp
properly biases up. The switch (SW) is used to zero the
output in some applications. Other applications use a
feedback loop to keep the output within its linear range
of operation.
FIGURE 4-8:
Miller Integrator.
Guard Ring
V
SS
V
IN
–
V
IN
+
MCP6281
–
V
OUT
V
IN
V
DD
/2
R
2
R
1
C
2
C
1
+
MCP6281
–
V
OUT
V
IN
V
DD
/2
R
C
V
OUT
V
IN
=
1
sRC
SW
+
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP6285-E/MS 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Connected 5MHz 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
MCP6285-E/P 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Connected 5MHz 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
MCP6285-E/SN 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Connected 5MHz 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
MCP6285T-E/MS 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Connected 5MHz 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
MCP6285T-E/SN 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Connected 5MHz 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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