欢迎访问ic37.com |
会员登录 免费注册
发布采购

REF3025AIDBZR 参数 Datasheet PDF下载

REF3025AIDBZR图片预览
型号: REF3025AIDBZR
PDF下载: 下载PDF文件 查看货源
内容描述: 50PPM /℃ , 50uA的在SOT23-3 CMOS电压基准 [50ppm/C Max, 50UA in SOT23-3 CMOS VOLTAGE REFERENCE]
分类和应用:
文件页数/大小: 14 页 / 412 K
品牌: BB [ BURR-BROWN CORPORATION ]
 浏览型号REF3025AIDBZR的Datasheet PDF文件第5页浏览型号REF3025AIDBZR的Datasheet PDF文件第6页浏览型号REF3025AIDBZR的Datasheet PDF文件第7页浏览型号REF3025AIDBZR的Datasheet PDF文件第8页浏览型号REF3025AIDBZR的Datasheet PDF文件第10页浏览型号REF3025AIDBZR的Datasheet PDF文件第11页浏览型号REF3025AIDBZR的Datasheet PDF文件第12页浏览型号REF3025AIDBZR的Datasheet PDF文件第13页  
NOISE PERFORMANCE  
APPLICATION CIRCUITS  
The REF30xx generates noise less than 50µVp-p between  
frequencies of 0.1Hz to 10Hz, and can be seen in the Typical  
Characteristic Curve 0.1 to 10Hz Voltage Noise.The noise  
voltage of the REF30xx increases with output voltage and  
operating temperature. Additional filtering may be used to  
improve output noise levels, although care should be taken  
to ensure the output impedance does not degrade AC  
performance.  
Negative Reference Voltage  
For applications requiring a negative and positive reference  
voltage, the OPA703 and REF30xx can be used to provide  
a dual supply reference from a ±5V supply. Figure 5 shows  
the REF3025 used to provide a ±2.5V supply reference  
voltage. The low offset voltage and low drift of the OPA703  
complement the low drift performance of the REF30xx to  
provide an accurate solution for split-supply applications.  
LONG TERM STABILITY  
Long term stability refers to the change of the output voltage  
of a reference over a period of months or years. This effect  
lessens as time progresses as is apparent by the long term  
stability curves. The typical drift value for the REF30xx is  
24ppm from 0-1000 hours, and 15ppm from 1000-2000  
hours. This parameter is characterized by measuring 30  
units at regular intervals for a period of 2000 hours.  
+5V  
+2.5V  
REF3025  
10k  
10kΩ  
LOAD REGULATION  
+5V  
Load regulation is defined as the change in output voltage  
due to changes in load current. Load regulation for the  
REF30xx is measured using force and sense contacts as  
pictured in Figure 4. The force and sense lines tied to the  
contact area of the output pin reduce the impact of contact  
and trace resistance, resulting in accurate measurement of  
the load regulation contributed solely by the REF30xx. For  
applications requiring improved load regulation, force and  
sense lines should be used.  
2.5V  
OPA703  
5V  
FIGURE 5. REF3025 Combined with OPA703 to Create  
Positive and Negative Reference Voltages.  
DATA ACQUISITION  
Often data acquisition systems require stable voltage  
references to maintain necessary accuracy. The REF30xx  
family features stability and a wide range of voltages suitable  
for most micro-controllers and data converters. Figure 6 and  
Figure 7 show two basic data acquisition systems.  
Output Pin  
Contact and  
Trace Resistance  
+
VOUT  
IL  
Sense Line  
Force Line  
Load  
Meter  
FIGURE 4. Accurate Load Regulation of REF30xx.  
REF3012, 3020, 3025, 3030, 3033, 3040  
9
SBVS032E  
www.ti.com