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AD7714ARS-5 参数 Datasheet PDF下载

AD7714ARS-5图片预览
型号: AD7714ARS-5
PDF下载: 下载PDF文件 查看货源
内容描述: 3 V / 5 V , CMOS , 500微安信号调理ADC [3 V/5 V, CMOS, 500 uA Signal Conditioning ADC]
分类和应用: 转换器光电二极管
文件页数/大小: 40 页 / 308 K
品牌: ADI [ ADI ]
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AD7714  
Data Acquisition  
from a single +3 V or +5 V supply provided that the input sig-  
nals to the AD7714’s analog inputs are all of positive polarity.  
The low power operation of the AD7714 ensures that very little  
power has to be brought across the isolation barrier. Figure 15  
shows the AD7714 in an isolated data acquisition system.  
The AD7714 with its three differential channels (or five pseudo-  
differential channels) is suited to low bandwidth, high resolution  
data acquisition systems. In addition, the three-wire digital  
interface allows this data acquisition front end to be isolated  
with just three optoisolators. The entire system can be operated  
+5V  
2
DV  
AV  
DD  
DD  
DD  
AV  
AD7714  
1A  
CHARGE BALANCING A/D  
STANDBY  
AIN1  
AIN2  
AIN3  
AIN4  
AIN5  
AIN6  
IN1+  
IN1–  
IN2+  
IN2–  
IN3+  
IN3–  
CONVERTER  
AUTO-ZEROED  
DIGITAL  
FILTER  
SYNC  
⌺⌬  
PGA  
A = 1–128  
BUFFER  
MODULATOR  
MCLK IN  
CLOCK  
GENERATION  
1A  
+5V  
SERIAL INTERFACE  
MCLK OUT  
AGND  
REGISTER BANK  
+V  
IN  
REF IN (+)  
RESET  
V
OUT  
AD780  
GND  
DRDY  
REF IN (–)  
AGND  
POL  
DGND  
DOUT  
DIN  
SCLK  
BUFFER  
CS  
DV  
DD  
OPTO-ISOLATORS  
MICROCONTROLLER  
Figure 15. Data Acquisition System Using the AD7714  
REV. C  
–37–  
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