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Low Voltage High Input Impedance Precision DC Summing Amplifier


This circuit presents a simple low voltage precision DC summing amplifier that has high input impedance of 10Mohm. The obvious advantage here is that the high input resistance of the summing resistor(s) reduces the loading on the input signal sources and therefore affords better signal accuracy and integrity. However, when such high value input resistors are used, the input leakage currents to the operational amplifier must be significantly lower than the lowest input signal currents available so that the accuracy of the summing amplifier is preserved. In this example, a 10Mohm resistor is used as a basic summing amplifier input resistor. To determine an input signal resolution, assume a œsignal current available as equal to 10pA, which computes to 10Mohm x 10pA =100µV. The input leakage current of the operational amplifier therefore limits the input voltage resolution and the minimum discernable voltage signal. A CMOS operational amplifier with very low input-leakage current specifications guaranteed

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½ ALD2701A, ALD1726, ½ ALD2711A, ALD1721, ½ ALD2711, ALD1706A, ½ ALD2706A, ALD1701A
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Other Descriptions

½ ALD2711 Capacity ½ ALD2711 Prototyping ½ ALD2711 Datenblatt ½ ALD2711 Datasheet
½ ALD2711 Broker ½ ALD2711 Schematic ½ ALD2711 replacement ½ ALD2711 gleichwertige
½ ALD2711 δελτίο ½ ALD2711 PCN ½ ALD2711 Revision ½ ALD2711 MOQ
½ ALD2711 示意圖 ½ ALD2711 Reference Design ½ ALD2711 EOL ½ ALD2711 相等於
½ ALD2711 Distribution ½ ALD2711 Leadtime ½ ALD2711 Xref ½ ALD2711 End-of-Life
½ ALD2711 Suffix ½ ALD2711 Schematische ½ ALD2711 Pin-out ½ ALD2711 Example
½ ALD2711 Schéma ½ ALD2711 데이터시트 ½ ALD2711 Product Brief ½ ALD2711 Scheda
½ ALD2711 Distributor ½ ALD2711 Схематический ALD1706A Capacity ALD1706A RoHS
ALD1706A équivalent ALD1706A Prototyping ALD1706A Features ALD1706A Schematic
ALD1706A Schematico ALD1706A данные ALD1706A δελτίο ALD1706A PCN
ALD1706A Revision ALD1706A Ersatz ALD1706A Stock ALD1706A 示意圖
ALD1706A EOL ALD1706A Esquema ALD1706A Cross Reference ALD1706A Circuit
ALD1706A Errata ALD1706A Ficha técnica ALD1706A Xref ALD1706A 회로도
ALD1706A Mechanical Outline ALD1706A Schéma ALD1706A User Guide ALD1706A 相等于
ALD1706A 데이터시트 ALD1706A Product Brief ALD1706A Distributor ALD1706A PDF
ALD1721 RoHS ALD1721 Broker ALD1721 Schematic ALD1721 Schematico
ALD1721 gleichwertige ALD1721 PCN ALD1721 Stock ALD1721 Catalog
ALD1721 Prototype ALD1721 EOL ALD1721 Esquema ALD1721 Availability
ALD1721 相等於 ALD1721 Distribution ALD1721 Design Idea ALD1721 數據
ALD1721 データシート ALD1721 Lead Time ALD1721 Suffix ALD1721 Options
ALD1721 Operating Parameter ALD1721 Archive ALD1721 Schéma ALD1721 User Guide
ALD1721 데이터시트 ALD1721 Distributor ALD1721 Ficha técnica de ALD1721 Fichetechnique
ALD1721 PDF ALD1721 Схематический ALD1726 回路図 ALD1726 Circuit
ALD1726 Equivalent ALD1726 Application Note ALD1726 회로도 ALD1726 相等於
ALD1726 数据 ALD1726 Errata ALD1726 相等于 ALD1726 Prototyping
ALD1726 данные ALD1726 Example ALD1726 Revision ALD1726 MOQ
ALD1726 Product Brief ALD1726 Lead Time ALD1726 End-of-Life ALD1726 データシート
ALD1726 Component ALD1726 Fichatécnicade ALD1726 Ersatz ALD1726 Fiche technique
ALD1726 PDF ALD1726 Specs ALD1726 PCN ALD1726 Options
ALD1726 Reference Design ALD1726 Design Idea ALD1726 δελτίο ALD1726 Fichetechnique
½ ALD2706A Fiche technique ½ ALD2706A Component ½ ALD2706A Application Note ½ ALD2706A Operating Parameter
½ ALD2706A Distributor ½ ALD2706A Explanation ½ ALD2706A данные ½ ALD2706A Release Notes
½ ALD2706A Xref ½ ALD2706A 相等於 ½ ALD2706A Availability ½ ALD2706A Mechanical Outline
½ ALD2706A Datasheet ½ ALD2706A Схематический ½ ALD2706A Archive ½ ALD2706A Features
½ ALD2706A Example ½ ALD2706A MOQ ½ ALD2706A Specs ½ ALD2706A Fichatécnicade
½ ALD2706A replacement ½ ALD2706A Esquema ½ ALD2706A Broker ½ ALD2706A Technical Specs
½ ALD2706A Scheda ½ ALD2706A Design Idea ½ ALD2706A 回路図 ½ ALD2706A PDF
½ ALD2706A RoHS ½ ALD2706A Stock ½ ALD2711A Features ½ ALD2711A Schematico
½ ALD2711A gleichwertige ½ ALD2711A δελτίο ½ ALD2711A Data Sheet ½ ALD2711A Explanation
½ ALD2711A Revision ½ ALD2711A Ersatz ½ ALD2711A Stock ½ ALD2711A Catalog
½ ALD2711A MOQ ½ ALD2711A 示意圖 ½ ALD2711A Reference Design ½ ALD2711A Esquema
½ ALD2711A 相等於 ½ ALD2711A 數據 ½ ALD2711A Circuit ½ ALD2711A Technical Specs
½ ALD2711A End-of-Life ½ ALD2711A Design ½ ALD2711A Suffix ½ ALD2711A Options
½ ALD2711A Mechanical Outline ½ ALD2711A Operating Parameter ½ ALD2711A Archive ½ ALD2711A Schéma
½ ALD2711A User Guide ½ ALD2711A Product Brief ½ ALD2711A Scheda ½ ALD2711A 数据
ALD1701A RoHS ALD1701A Process Change Notification ALD1701A équivalent ALD1701A Prototyping
ALD1701A Samples ALD1701A Datenblatt ALD1701A данные ALD1701A Data Sheet
ALD1701A Stock ALD1701A Prototype ALD1701A Distribution ALD1701A Design Idea
ALD1701A Cross Reference ALD1701A 數據 ALD1701A Specs ALD1701A Technical Specs
ALD1701A Lead Time ALD1701A Ficha técnica ALD1701A 회로도 ALD1701A Schematische
ALD1701A Mechanical Outline ALD1701A Example ALD1701A Operating Parameter ALD1701A Archive
ALD1701A User Guide ALD1701A Scheda ALD1701A Distributor ALD1701A Equivalent
ALD1701A Fichetechnique ALD1701A Схематический ½ ALD2701A Specs ½ ALD2701A Samples
½ ALD2701A 데이터시트 ½ ALD2701A Fiche technique ½ ALD2701A データシート ½ ALD2701A Stock
½ ALD2701A Catalog ½ ALD2701A Esquema ½ ALD2701A MOQ ½ ALD2701A Schéma
½ ALD2701A Operating Parameter ½ ALD2701A RoHS ½ ALD2701A Pin-out ½ ALD2701A Leadtime
½ ALD2701A Reference Design ½ ALD2701A Fichatécnicade ½ ALD2701A User Guide ½ ALD2701A 數據
½ ALD2701A Ficha técnica de ½ ALD2701A Schematische ½ ALD2701A Component ½ ALD2701A Technical Specs
½ ALD2701A replacement ½ ALD2701A Schematic ½ ALD2701A Release Notes ½ ALD2701A Prototype
½ ALD2701A Design ½ ALD2701A Capacity ½ ALD2701A equivalente ½ ALD2701A Datenblatt