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參數(shù)資料
| 型號(hào)： | LM4050AIM3X-10/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 10 V, PDSO3 |
| 封裝： | 3 X 1.30 MM, PLASTIC, TO-236-AB, SOT-23, 3 PIN |
| 文件頁(yè)數(shù)： | 3/15頁(yè) |
| 文件大小： | 281K |
| 代理商： | LM4050AIM3X-10/NOPB |
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Functional Block Diagram
10104514
Applications Information
The LM4050 is a precision micro-power curvature-corrected
bandgap shunt voltage reference. For space critical applica-
tions, the LM4050 is available in the sub-miniature SOT-23
surface-mount package. The LM4050 has been designed for
stable operation without the need of an external capacitor
connected between the “+” pin and the “” pin. If, however, a
bypass capacitor is used, the LM4050 remains stable. Re-
ducing design effort is the availability of several fixed reverse
breakdown voltages: 2.048V, 2.500V, 4.096V, 5.000V,
8.192V, and 10.000V. The minimum operating current in-
creases from 60 A for the LM4050-2.0 to 100 A for the
LM4050-10.0. All versions have a maximum operating cur-
rent of 15 mA.
LM4050s in the SOT-23 packages have a parasitic Schottky
diode between pin 2 () and pin 3 (Die attach interface
contact). Therefore, pin 3 of the SOT-23 package must be
left floating or connected to pin 2.
The 4.096V version allows single +5V 12-bit ADCs or DACs
to operate with an LSB equal to 1 mV. For 12-bit ADCs or
DACs that operate on supplies of 10V or greater, the 8.192V
version gives 2 mV per LSB.
The typical thermal hysteresis specification is defined as the
change in +25C voltage measured after thermal cycling.
The device is thermal cycled to temperature -40C and then
measured at 25C. Next the device is thermal cycled to
temperature +125C and again measured at 25C. The re-
sulting V
OUT delta shift between the 25C measurements is
thermal hysteresis. Thermal hysteresis is common in preci-
sion references and is induced by thermal-mechanical pack-
age stress. Changes in environmental storage temperature,
operating temperature and board mounting temperature are
all factors that can contribute to thermal hysteresis.
In a conventional shunt regulator application (Figure 1),an
external series resistor (R
S) is connected between the sup-
ply voltage and the LM4050. R
S determines the current that
flows through the load (I
L) and the LM4050 (IQ). Since load
current and supply voltage may vary, R
S should be small
enough to supply at least the maximum guaranteed I
RMIN
(spec. table) to the LM4050 even when the supply voltage is
at its minimum and the load current is at its maximum value.
When the supply voltage is at its maximum and I
L is at its
minimum, R
S should be large enough so that the current
flowing through the LM4050 is less than 15 mA.
R
S is determined by the supply voltage, (VS), the load and
operating current, (I
L and IQ), and the LM4050’s reverse
breakdown voltage, V
R.
Typical Applications
10104515
FIGURE 1. Shunt Regulator
LM4050
www.national.com
11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4050AIM3-8.2/NOPB | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 8.192 V, PDSO3 |
| LM4050CEM3-4.1/NOPB | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 4.096 V, PDSO3 |
| LM4050CEM3X-8.2/NOPB | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 8.192 V, PDSO3 |
| LM4050CEM3X-10/NOPB | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 10 V, PDSO3 |
| LM4050BIM3X-8.2/NOPB | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 8.192 V, PDSO3 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4050AIM3X-2.0/NOPB | 功能描述:IC VREF SHUNT PREC 2.048V SOT23 RoHS:是 類別:集成電路 (IC) >> PMIC - 電壓基準(zhǔn) 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 基準(zhǔn)類型:旁路，精度 輸出電壓:5V 容差:±0.5% 溫度系數(shù):100ppm/°C 輸入電壓:- 通道數(shù):1 電流 - 陰極:80µA 電流 - 靜態(tài):- 電流 - 輸出:15mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:TO-236-3，SC-59，SOT-23-3 供應(yīng)商設(shè)備封裝:SOT-23-3 包裝:帶卷 (TR) 其它名稱:LM4040CIM3-5.0MLTRLM4040CIM3-5.0MLTR-ND |
| LM4050AIM3X-2.5 | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 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 |
| LM4050AIM3X-2.5 NOPB | 制造商:National Semiconductor 功能描述:V-Ref Precision 2.5V 15mA 3-Pin SOT-23 T/R |
| LM4050AIM3X-2.5/NOPB | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 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 |
| LM4050AIM3X25 | 制造商:Texas Instruments 功能描述: |
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