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参数资料
| 型号： | LMP91000SDE |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO14 |
| 封装： | LLP-14 |
| 文件页数： | 9/24页 |
| 文件大小： | 696K |
| 代理商： | LMP91000SDE |
30132583
FIGURE 4. 3-Lead Amperometric Cell
2-lead Galvanic Cell In Ground Referred Configuration
When the LMP91000 is interfaced to a galvanic cell (for in-
stance to an Oxygen gas sensor) referred to the ground of the
system, an external resistor needs to be placed in parallel to
the gas sensor; the negative electrode of the gas sensor is
connected to the ground of the system and the positive elec-
trode to the Vref pin of the LMP91000, the working pin of the
LMP91000 is connected to the ground.
The LMP91000 is then configured in 2-lead galvanic cell
mode and the Vref bypass feature needs to be enabled. In
this configuration the Control Amplifier (A1) is turned off, and
the output of the gas sensor is amplified by the Tran-
simpedance Amplifier (TIA) which is configured as a simple
non-inverting amplifier.
The gain of this non inverting amplifier is set according the
following formula
Gain= 1+(R
TIA/RLoad)
If different gains are required, an external resistor can be
connected between the pins C1 and C2. In this case the in-
ternal feedback resistor should be programmed to “external”.
17
www.national.com
LMP91000
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMP91000SDE/NOPB | 功能描述:空气质量传感器 RoHS:否 制造商:GE M&C / Telaire 类型:CO2 Module 检测灵敏度: 工作电源电压:5 V 最大工作温度:+ 50 C 最小工作温度:0 C |
| LMP91000SDEVAL | 制造商:Texas Instruments 功能描述: |
| LMP91000SDEVAL/NOPB | 功能描述:多功能传感器开发工具 GAS SENSOR AFE EVAL BOARDLMP91 RoHS:否 制造商:Texas Instruments 工具用于评估:LMP91200 接口类型:SPI 工作电压:1.8 V to 5.5 V 最大工作温度: |
| LMP91000SDX | 制造商:TI 制造商全称:Texas Instruments 功能描述:Sensor AFE System: Configurable AFE Potentiostat for Low-Power Chemical Sensing Applications |
| LMP91000SDX/NOPB | 功能描述:空气质量传感器 RoHS:否 制造商:GE M&C / Telaire 类型:CO2 Module 检测灵敏度: 工作电源电压:5 V 最大工作温度:+ 50 C 最小工作温度:0 C |
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