參數(shù)資料
型號(hào)： MCP3204-CIST
廠(chǎng)商： Microchip Technology Inc.
元件分類(lèi)： 串行ADC
英文描述： 2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI Serial Interface
中文描述： 2.7 4-Channel/8-Channel 12位A / D轉(zhuǎn)換器具有SPI串行接口
文件頁(yè)數(shù)： 18/20頁(yè)
文件大?。?/td> 425K
代理商： MCP3204-CIST
MCP3204/3208
DS21298B-page 18
Preliminary
1999 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 sub-
strate which has a resistance of 5 -10
.
If no ground plane is utilized, then both grounds must
be connected to V
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 con-
nected 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:
Ground Pins.
Separation of Analog and Digital
V
DD
Digital Side
-SPI Interface
-Shift Register
-Control Logic
Analog Side
-Sample Cap
-Capacitor Array
-Comparator
Substrate
5 - 10
Analog
Ground Pin
Digital
Ground Pin
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MCP3204T-BI/SL 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-bit SPI 4 Chl RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MCP3204T-BI/ST 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI⑩ Serial Interface
MCP3204T-CI/P 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI⑩ Serial Interface
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