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| 型号： | MCP3208-BI/ST |
| 元件分类： | ADC |
| 英文描述： | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO14 |
| 封装： | 4.4 MM, PLASTIC, TSSOP-14 |
| 文件页数： | 17/40页 |
| 文件大小： | 722K |
| 代理商： | MCP3208-BI/ST |
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MCP3204/3208
DS21298E-page 24
2008 Microchip Technology Inc.
6.5
Utilizing the Digital and Analog
Ground Pins
The MCP3204/3208 devices provide both digital and
analog ground connections to provide another means
of noise reduction. As shown in Figure 6-5, the analog
and digital circuitry is separated internal to the device.
This reduces noise from the digital portion of the device
being coupled into the analog portion of the device. The
two grounds are connected internally through the
substrate, which has a resistance of 5 -10.
If no ground plane is utilized, then both grounds must
be connected to VSS on the board. If a ground plane is
available, both digital and analog ground pins should
be connected to the analog ground plane. If both an
analog and a digital ground plane are available, both
the digital and the analog ground pins should be
connected to the analog ground plane. Following these
steps will reduce the amount of digital noise from the
rest of the board being coupled into the A/D converter.
FIGURE 6-5:
Separation of Analog and
Digital Ground Pins.
MCP3204/08
Analog Ground Plane
DGND
AGND
V
DD
0.1 F
Substrate
5 - 10
Digital Side
-SPI Interface
-Shift Register
-Control Logic
Analog Side
-Sample Cap
-Capacitor Array
-Comparator
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相关代理商/技术参数 |
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| MCP3208-CI/P | 功能描述:模数转换器 - ADC 12-bit SPI 8 Chl RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3208-CI/P | 制造商:Microchip Technology Inc 功能描述:IC 12BIT ADC 3208 DIP16 |
| MCP3208-CI/P | 制造商:Microchip Technology Inc 功能描述:A-D Converter IC Number of Bits:12 |
| MCP3208-CI/SL | 功能描述:模数转换器 - ADC 12-bit SPI 8 Chl RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3208-CI/SL | 制造商:Microchip Technology Inc 功能描述:IC 12 ADC SMD 3208 SOIC16 |
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