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AD7814ARTZ-REEL7

更新时间： 2024-01-28 17:50:08
品牌 Logo 应用领域
亚德诺 - ADI 传感器换能器温度传感器输出元件
页数 文件大小 规格书
8页 128K
描述
10-Bit Digital Temperature Sensor in 6-Lead SOT-23

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AD7814ARTZ-REEL7 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：TSOP6,.11,37
针数：6Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：1.02最大精度（摄氏度）：3.5 Cel
主体宽度：1.6 mm主体高度：1.15 mm
主体长度或直径：2.9 mm外壳：PLASTIC
JESD-609代码：e4安装特点：SURFACE MOUNT
位数：10端子数量：6
最大工作电流：0.4 mA最高工作温度：125 °C
最低工作温度：-55 °C输出接口类型：4-WIRE INTERFACE
封装主体材料：PLASTIC/EPOXY封装等效代码：TSOP6,.11,37
封装形状/形式：RECTANGULAR电源：3/5 V
传感器/换能器类型：TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL子类别：Other Sensors/Transducers
最大供电电压：5.5 V最小供电电压：2.7 V
表面贴装：YES技术：CMOS
端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)端接类型：SOLDER
Base Number Matches：1

AD7814ARTZ-REEL7 数据手册

 浏览型号AD7814ARTZ-REEL7的Datasheet PDF文件第2页浏览型号AD7814ARTZ-REEL7的Datasheet PDF文件第3页浏览型号AD7814ARTZ-REEL7的Datasheet PDF文件第4页浏览型号AD7814ARTZ-REEL7的Datasheet PDF文件第5页浏览型号AD7814ARTZ-REEL7的Datasheet PDF文件第6页浏览型号AD7814ARTZ-REEL7的Datasheet PDF文件第8页 
AD7814  
8051*  
P3.1  
ADSP-21xx*  
AD7814*  
AD7814*  
SCK  
SCLK  
SCLK  
P3.0  
P1.2  
P1.3  
DR  
DOUT  
DIN  
DOUT  
DIN  
DT  
RFS  
TFS  
CS  
CS  
*ADDITIONAL PINS OMITTED FOR CLARITY  
*ADDITIONAL PINS OMITTED FOR CLARITY  
Figure 4. AD7814 to 8051 Interface  
Figure 6. AD7814 to ADSP-21xx Interface  
AD7814 to PIC16C6x/7x Interface  
Figure 5 shows an interface circuit between the AD7814 and the  
PIC16C6x/7x microcontroller. The PIC16C6x/7x synchronous  
serial port (SSP) is configured as an SPI master with the clock  
polarity bit set to a logic one. In this mode, the serial clock line  
of the PIC16C6x/7x idles high between data transfers. Data is  
transferred to and from the AD7814 in two 8-bit serial data  
operations. In the example shown, port line RA1 is being used  
to generate the CS for the AD7814.  
MOUNTING THE AD7814  
The AD7814 can be used for surface or air temperature sensing  
applications. If the device is cemented to a surface with ther-  
mally conductive adhesive, the die temperature will be within  
about 0.1°C of the surface temperature, thanks to the device’s  
low power consumption. Care should be taken to insulate the  
back and leads of the device from the air, if the ambient air  
temperature is different from the surface temperature being  
measured.  
PIC16C6x/7x*  
AD7814*  
The ground pin provides the best thermal path to the die, so the  
temperature of the die will be close to that of the printed circuit  
ground track. Care should be taken to ensure that this is in good  
thermal contact with the surface being measured.  
SCK  
SCLK  
SDO  
SDI  
DOUT  
DIN  
RA1  
CS  
As with any IC, the AD7814 and its associated wiring and cir-  
cuits must be kept free from moisture to prevent leakage and  
corrosion, particularly in cold conditions where condensation is  
more likely to occur. Water-resistant varnishes and conformal  
coatings can be used for protection. The small size of the  
AD7814 package allows it to be mounted inside sealed metal  
probes, which provide a safe environment for the device.  
*ADDITIONAL PINS OMITTED FOR CLARITY  
Figure 5. AD7814 to PIC16C6x/7x Interface  
AD7814 to ADSP-21xx Interface  
Figure 6 shows an interface between the AD7814 and the  
ADSP-21xx DSP processor. To ensure correct operation of the  
interface, the SPORT control register should be set up as follows:  
SUPPLY DECOUPLING  
TFSW = RFSW = 1, Alternate Framing  
INVRFS = INVTFS = 1, Active Low Framing Signal  
DTYPE = 00, Right Justify Data  
The AD7814 should be decoupled with a 0.1 µF ceramic  
capacitor between VDD and GND. This is particularly important  
if the AD7814 is mounted remotely from the power supply.  
SLEN = 1111, 16-Bit Data Words  
ISCLK = 1, Internal Serial Clock  
1.0  
0.8  
0.6  
0.4  
0.2  
TFSR = RFS = 1, Frame Every Word  
IRFS = 0, RFS Configured As Input  
ITFS = 1, TFS Configured As Output  
The interface requires an inverter between the SCLK line of the  
ADSP-21xx and the SCLK input of the AD7814. The ADSP-  
21xx has the TFS and RFS of the SPORT tied together with  
TFS set as an output and RFS set as an input. The DSP operates  
in alternate framing mode and the SPORT control register is set  
up as described earlier.  
0
–0.2  
–0.4  
–55  
–40  
0
25  
40  
85  
100  
120  
TEMPERATURE – ؇C  
Figure 7. Typical Temperature Error  
REV. E  
–7–  
1...45678

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