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參數(shù)資料
| 型號(hào)： | REF3140AIDBZTG4 |
| 英文描述： | 15ppm/C Max, 100UA, SOT23-3 SERIES VOLTAGE REFERENCE |
| 中文描述： | 百萬(wàn)分之十五/ C最大，100uA的，采用SOT23 - 3系列電壓基準(zhǔn) |
| 文件頁(yè)數(shù)： | 8/13頁(yè) |
| 文件大小： | 295K |
| 代理商： | REF3140AIDBZTG4 |
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REF3112, 3120, 3125, 3130, 3133, 3140
8
SBVS046C
www.ti.com
NOISE PERFORMANCE
Typical 0.1Hz to 10Hz voltage noise can be seen in the
Typical Characteristic Curve, 0.1 to 10Hz Voltage Noise The
noise voltage of the REF31xx 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 the
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 shown by the long-term
stability curves. The typical drift value for the REF31xx is
70ppm from 0-1000 hours. This parameter is characterized
by measuring 30 units at regular intervals for a period of 1000
hours.
LOAD REGULATION
Load regulation is defined as the change in output voltage
due to changes in load current. The load regulation of the
REF31xx is measured using force and sense contacts as
pictured in Figure 4. The force and sense lines reduce the
impact of contact and trace resistance, resulting in accurate
measurement of the load regulation contributed solely by the
REF31xx. For applications requiring improved load regula-
tion, force and sense lines should be used.
Output Pin
Meter
V
OUT
+
Sense Line
Force Line
I
L
Load
Contact and
Trace Resistance
FIGURE 4. Accurate Load Regulation of REF31xx.
APPLICATION CIRCUITS
Negative Reference Voltage
For applications requiring a negative and positive reference
voltage, the REF31xx and OPA703 can be used to provide
a dual supply reference from a
±
5V supply. Figure 5 shows
the REF3125 used to provide a
±
2.5V supply reference
voltage. The low drift performance of the REF31xx
complement the low offset voltage and low drift of the
OPA703 to provide an accurate solution for split-supply
applications.
OPA703
REF3125
+5V
–
5V
+5V
10k
10k
+2.5V
–
2.5V
FIGURE 5. REF3125 Combined with OPA703 to Create
Positive and Negative Reference Voltages.
DATA ACQUISITION
Data acquisition systems often require stable voltage
references to maintain accuracy. The REF31xx family features
stability and a wide range of voltages suitable for most micro-
controllers and data converters. Figure 6, Figure 7, and
Figure 8 show basic data acquisition systems.
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| REFERENCEMANUAL | Reference Manual - ElanSC400 Register Set Reference Manual (Including Changes for the 蒷anSC410 Microcontroller) |
| REG103-25 | DMOS 500mA Low Dropout (LDO) Regulator |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| REF3140AQDBZRQ1 | 功能描述:SERIES VOLTAGE REFERENCE 制造商:texas instruments 系列:* 包裝:剪切帶（CT） 零件狀態(tài):在售 安裝類型:表面貼裝 封裝/外殼:TO-236-3，SC-59，SOT-23-3 供應(yīng)商器件封裝:SOT-23-3 標(biāo)準(zhǔn)包裝:1 |
| REF3140-DIE | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SERIES VOLTAGE REFERENCE |
| REF3140TDD1 | 制造商:Texas Instruments 功能描述:IC VREF SRS PREC 4.096V |
| REF3140TDD2 | 制造商:Texas Instruments 功能描述:IC VREF SRS PREC 4.096V |
| REF3212 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4ppm/C 100A, SOT23-6 SERIES VOLTAGE REFERENCE |
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