- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383589 > mcp3208 (Microchip Technology Inc.) 2.7V 4-Channel/8-Channel 12-Bit A/D Converters With SPI Serial Interface(SPI串行接口的8通道12位A/D轉(zhuǎn)換器) PDF資料下載
參數(shù)資料
| 型號： | mcp3208 |
| 廠商： | Microchip Technology Inc. |
| 元件分類： | 串行ADC |
| 英文描述： | 2.7V 4-Channel/8-Channel 12-Bit A/D Converters With SPI Serial Interface(SPI串行接口的8通道12位A/D轉(zhuǎn)換器) |
| 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（SPI串行接口的8通道12位的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 19/34頁 |
| 文件大?。?/td> | 673K |
| 代理商： | MCP3208 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁當(dāng)前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁
2002 Microchip Technology Inc.
DS21298C-page 19
MCP3204/3208
6.2
Maintaining Minimum Clock
Speed
When the MCP3204/3208 initiates the sample period,
charge is stored on the sample capacitor. When the
sample period is complete, the device converts one bit
for each clock that is received. It is important for the
user to note that a slow clock rate will allow charge to
bleed off the sample capacitor while the conversion is
taking place. At 85°C (worst case condition), the part
will maintain proper charge on the sample capacitor for
at least 1.2 ms after the sample period has ended. This
means that the time between the end of the sample
period and the time that all 12 data bits have been
clocked out must not exceed 1.2 ms (effective clock
frequency of 10 kHz). Failure to meet this criterion may
introduce linearity errors into the conversion outside
the rated specifications. It should be noted that during
the entire conversion cycle, the A/D converter does not
require a constant clock speed or duty cycle, as long as
all timing specifications are met.
6.3
Buffering/Filtering the Analog
Inputs
If the signal source for the A/D converter is not a low
impedance source, it will have to be buffered or inaccu-
rate conversion results may occur (see Figure 4-2). It is
also recommended that a filter be used to eliminate any
signals that may be aliased back into the conversion
results, as is illustrated in Figure 6-3, where an op amp
is used to drive the analog input of the MCP3204/3208.
This amplifier provides a low impedance source for the
converter input, and a low pass filter, which eliminates
unwanted high frequency noise.
Low pass (anti-aliasing) filters can be designed using
Microchip’s free interactive FilterLab software. Filter-
Lab will calculate capacitor and resistor values, as well
as determine the number of poles that are required for
the application. For more information on filtering sig-
nals, see AN699,
“Anti-Aliasing Analog Filters for Data
Acquisition Systems”
.
FIGURE 6-3:
filter for the signal being converted by the MCP3204.
The MCP601 Operational Amplifier is used to implement a second order anti-aliasing
MCP3204
V
DD
10 μF
IN-
IN+
-
+
V
IN
C
1
C
2
V
REF
4.096V
Reference
1 μF
1 μF
0.1 μF
MCP601
R
1
R
2
R
3
R
4
MCP1541
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MCP3208-CIP | 2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI Serial Interface |
| MCP3204-CIST | 2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI Serial Interface |
| MCP3204 | 2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI Serial Interface |
| MCP3204-BIP | CBS SCREW-MOUNT NYLON 3/4,1 |
| MCP3204-BISL | 2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI Serial Interface |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCP-320-81302-0B | 制造商:Supermicro Computer Inc 功能描述:OPTIONAL FAN TRAY FOR ONE 40X28MM FAN IN SC813 - Bulk |
| MCP-320-81802-0B | 制造商:SUPER MICRO COMPUTER, INC. 功能描述:SC818_GPU_FAN _HOLDER_2_4028_ASSY (A5-SC81806-XX00C101) - Bulk |
| MCP-320-83602-0N-AI031 | 制造商:Supermicro Computer Inc 功能描述:EXTRA 80MM FAN BRACKET SET FOR OEM SC836 - Bulk |
| MCP3208-BI/P | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-bit SPI 8 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 輸入類型:Differential 信噪比:107 dB 接口類型: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 |
| MCP3208-BI/SL | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-bit SPI 8 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 輸入類型:Differential 信噪比:107 dB 接口類型: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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。