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參數(shù)資料
| 型號： | REF3025AIDBZRG4 |
| 英文描述： | 50ppm/C Max, 50UA in SOT23-3 CMOS VOLTAGE REFERENCE |
| 中文描述： | 50ppm / C最大，采用SOT23 50uA的3 CMOS電壓基準(zhǔn) |
| 文件頁數(shù)： | 9/14頁 |
| 文件大?。?/td> | 416K |
| 代理商： | REF3025AIDBZRG4 |
REF3012, 3020, 3025, 3030, 3033, 3040
SBVS032E
9
www.ti.com
NOISE PERFORMANCE
The REF30xx generates noise less than 50
μ
Vp-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.
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.
LOAD REGULATION
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.
Output Pin
Meter
V
OUT
+
Sense Line
Force Line
Load
I
L
Contact and
Trace Resistance
FIGURE 4. Accurate Load Regulation of REF30xx.
APPLICATION CIRCUITS
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.
OPA703
REF3025
+5V
–
5V
+5V
10k
10k
+2.5V
–
2.5V
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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| REF3025AIDBZT | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 2.5V 50ppm/DegC 50uA SOT23-3 Series RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| REF3025AIDBZTG4 | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 2.5V 50ppm/DegC 50uA SOT23-3 Series RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| REF3025TB-GT3 | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 LOW VOLTAGE REFERENCE RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| REF3030 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:50ppm/C Max, 50UA in SOT23-3 CMOS VOLTAGE REFERENCE |
| REF3030AIDBZR | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 3.0V 50ppm/DegC 50uA SOT23-3 Series RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
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