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| 型號(hào)： | REF5025ID |
| 英文描述： | Low-Noise, Very Low Drift, Precision VOLTAGE REFERENCE |
| 中文描述： | 低噪聲，低漂移，高精度電壓基準(zhǔn) |
| 文件頁(yè)數(shù)： | 9/18頁(yè) |
| 文件大?。?/td> | 469K |
| 代理商： | REF5025ID |
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APPLICATION INFORMATION
SUPPLY VOLTAGE
The REF50xx family of voltage references features
extremely low dropout voltage. With the exception of
the
REF5020,
which
has
requirement
of
2.7V,
these
operated with a supply of 200mV above the output
voltage
in
an
unloaded
conditions, a typical dropout voltage versus load plot
is shown in
Figure 6
of the Typical Characteristics.
OUTPUT ADJUSTMENT (TRIM Pin)
The REF50xx provides a very accurate voltage
output. However, V
OUT
can be adjusted from the
nominal value for the purpose of trimming system
errors by configuring the TRIM pin (pin 5). The TRIM
pin provides for adjustment of the voltage at V
OUT
over a ±15mV range.
Figure 23
shows a typical circuit
using the TRIM pin to adjust V
OUT
. When using this
technique,
the
temperature
resistors can degrade the temperature drift at the
output.
1.2V
60k
W
REF50xx
TEMP
μ
T
V
OUT
V
IN
GND
TRIM
Bandgap
+V
SUPPLY
μ
T
(10 A
at 25 C)
m
°
BASIC CONNECTIONS
Figure 22
shows the typical connections for the
REF50xx.
A
supply
bypass
between 1
μ
F to 10
μ
F is recommended. A 1
μ
F to
50
μ
F,
low-ESR
output
connected to V
OUT
.
DNC
TEMP
V
OUT
V
IN
GND
DNC
NC
TRIM
REF50xx
+V
SUPPLY
10k
W
1k
W
470
W
TEMPERATURE DRIFT
The REF50xx is designed for minimal drift error,
which is defined as the change in output voltage over
temperature. The drift is calculated using the box
method, as described by the following equation:
DNC
TEMP
V
OUT
V
IN
GND
DNC
NC
TRIM
REF50xx
C
BYPASS
1 F to 10 F
m
m
C
L
1 F to 50 F
m
m
+V
SUPPLY
V
OUT
Drift
V
OUTMAX
V
OUT
V
OUTMIN
Temp Range
10
6
(ppm)
(1)
REF5020, REF5025
REF5030, REF5040
REF5045, REF5050
SBOS410–JUNE 2007
The
bandgap voltage references that are specifically
designed for excellent initial voltage accuracy and
drift.
Figure 21
shows a simplified block diagram of
the REF50xx.
REF50xx
is
family
of
low-noise,
precision
a
minimum
references
supply
can
be
condition.
For
loaded
coefficients
of
the
Figure 21. REF50xx Simplified Block Diagram
capacitor
ranging
capacitor
(C
L
)
must
be
Figure 23. V
OUT
Adjustment Using the TRIM Pin
Figure 22. Basic Connections
The REF50xx features a maximum drift coefficient of
3ppm/
°
C for the high-grade version, and 8ppm/
°
C for
the standard-grade.
9
Copyright 2007, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Link(s):
REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| REF5025IDG4 | Low-Noise, Very Low Drift, Precision VOLTAGE REFERENCE |
| REF5025IDR | Low-Noise, Very Low Drift, Precision VOLTAGE REFERENCE |
| REF5025IDRG4 | Low-Noise, Very Low Drift, Precision VOLTAGE REFERENCE |
| REF5030 | Low-Noise, Very Low Drift, Precision VOLTAGE REFERENCE |
| REF5030A | Low-Noise, Very Low Drift, Precision VOLTAGE REFERENCE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| REF5025IDG4 | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Low Noise Very Low Drift Prec Vltg Ref 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 |
| REF5025IDGKR | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Lo Noise Very Lo Drift Prec Vltg Ref 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 |
| REF5025IDGKT | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Lo Noise Very Lo Drift Prec Vltg Ref 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 |
| REF5025IDR | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Lo Noise Very Low Drift Prec VLTG REF 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 |
| REF5025IDRG4 | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Low Noise Very Low Drift Prec Vltg Ref 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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