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參數(shù)資料
| 型號： | VRE3025BS |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | THREE TERM VOLTAGE REFERENCE, PDSO8 |
| 封裝： | SMT-8 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 0K |
| 代理商： | VRE3025BS |
VRE3025DS REV.D JULY 2000
TEMPERATURE PERFORMANCE
The VRE3025 is designed for applications where the
initial
error
at
room
temperature
and
drift
over
temperature are important to the user.
For many
instrument manufacturers, a voltage reference with a
temperature coefficient less than 1ppm/
°C makes it
possible to not have to perform a system temperature
calibration, a slow and costly process.
Of the three TC specification methods (slope, butterfly,
and box), the box method is used commonly used. A box
is formed by the min/max limits for the nominal output
voltage over the operating temperature range.
The
equation follows:
This method corresponds more accurately to the
method of test and provides a closer estimate of actual
error than the other methods.
The box method
guarantees limits for the temperature error but does not
specify the exact shape and slope of the device under
test.
A
designer
who
needs
a
14-bit
accurate
data
acquisition system over the industrial temperature range
(-40
°C to +85°C), will need a voltage reference with a
temperature coefficient (TC) of 1.0ppm/
°C if the reference
is allowed to contribute an error equivalent to 1LSB. For
1/2LSB equivalent error from the reference you would
need a voltage reference with a temperature coefficient of
0.5ppm/
°C. Figure 4 shows the required reference TC vs.
delta T change from 25
°C for resolution ranging from 8
bits to 20 bits.
THERMAL HYSTERISIS
A change in output voltage as a result of a temperature
change.
When references experience a temperature
change and return to the initial temperature, they do not
always have the same initial voltage. Thermal hysterisis
is difficult to correct and is a major error source in
systems that experience temperature changes greater
than 25
°C. Reference vendors are starting to include this
important specification in their datasheets.
(
)
6
min
max
nominal
min
max
10
.
=
T
V
C
T
0.01
0.1
1
10
100
1000
10000
1
10
100
20 BIT
18 BIT
16 BIT
14 BIT
12 BIT
10 BIT
8 BIT
ReferenceTC
(ppm/
°C)
Reference TC vs.
T change from 25°C for 1 LSB change
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| VRE3025C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low Cost Precision Reference |
| VRE3025CD | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Ref. +2.5V, 0/70C 2ppm 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 |
| VRE3025CS | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Ref. +2.5V, 0/70C 2ppm 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 |
| VRE3025J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low Cost Precision Reference |
| VRE3025JD | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Ref. +2.5V, -40/85C 0.6ppm 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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