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參數(shù)資料
| 型號： | VRE3050C |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | VRE3050 Low Cost Precision Reference |
| 中文描述： | VRE3050低成本精密參考 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 188K |
| 代理商： | VRE3050C |
VRE3050DS REV. D JULY 2000
TEMPERATURE PERFORMANCE
The VRE3050 is designed for applications where the
initial error at room temperature and drift over
temperature are important to the user.
instrument manufacturers, a voltage reference with a
temperature coefficient less than 1ppm/
°
C makes it
possible to not perform a system temperature calibration,
a slow and costly process.
For many
Of the three TC specification methods (slope, butterfly,
and box), the box method is most 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
=
T
V
V
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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PDF描述 |
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| VRE3050J | VRE3050 Low Cost Precision Reference |
| VRE3050K | VRE3050 Low Cost Precision Reference |
| VRE3050L | VRE3050 Low Cost Precision Reference |
| VRE306 | Low Cost Precision Reference |
| VRE306A | Low Cost Precision Reference |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| VRE3050CS | 功能描述:基準電壓& 基準電流 Ref. +5V, 0/70C 2ppm RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓撲結(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度: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 |
| VRE3050J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:VRE3050 Low Cost Precision Reference |
| VRE3050JS | 功能描述:基準電壓& 基準電流 Ref. +5V, -40/85C 0.6ppm RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓撲結(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度: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 |
| VRE3050K | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Precision Voltage Reference |
| VRE3050KS | 功能描述:基準電壓& 基準電流 Ref. +5V, -40/85C 1ppm RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓撲結(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度: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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