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參數(shù)資料
| 型號： | LM4128DMF-3.0 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | SOT-23 Precision Micropower Series Voltage Reference |
| 中文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 3 V, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 280K |
| 代理商： | LM4128DMF-3.0 |
T
D
= Temperature drift
V
REF
= Nominal preset output voltage
V
= Minimum output voltage over operating
temperature range
V
= Maximum output voltage over operating
temperature range
Δ
T = Operating temperature range.
The LM4128 features a low temperature drift of 75 ppm (max)
to 100 ppm (max), depending on the grade, from -40°C to
125°C.
LONG TERM STABILITY
Long-term stability refers to the fluctuation in output voltage
over a long period of time (1000 hours). The LM4128 features
a typical long-term stability of 50 ppm over 1000 hours. The
measurements are made using 5 units of each voltage option,
at a nominal input voltage (5V), with no load, at room tem-
perature.
EXPRESSION OF ELECTRICAL CHARACTERISTICS
Electrical characteristics are typically expressed in mV, ppm,
or a percentage of the nominal value. Depending on the ap-
plication, one expression may be more useful than the other.
To convert one quantity to the other one may apply the fol-
lowing:
ppm to mV error in output voltage:
Where:
V
REF
is in volts (V) and V
ERROR
is in milli-volts (mV).
Bit error (1 bit) to voltage error (mV):
V
is in volts (V), V
ERROR
is in milli-volts (mV), and n is the
number of bits.
mV to ppm error in output voltage:
Where:
V
REF
is in volts (V) and V
ERROR
is in milli-volts (mV).
Voltage error (mV) to percentage error (percent):
Where:
V
REF
is in volts (V) and V
ERROR
is in milli-volts (mV).
PRINTED CIRCUIT BOARD and LAYOUT
CONSIDERATIONS
References in SOT packages are generally less prone to PC
board mounting than devices in Small Outline (SOIC) pack-
ages. To minimize the mechanical stress due to PC board
mounting that can cause the output voltage to shift from its
initial value, mount the reference on a low flex area of the PC
board, such as near the edge or a corner.
The part may be isolated mechanically by cutting a U shape
slot on the PCB for mounting the device. This approach also
provides some thermal isolation from the rest of the circuit.
Bypass capacitors must be mounted close to the part. Mount-
ing bypass capacitors close to the part will reduce the para-
sitic trace components thereby improving performance.
13
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4128DMF-3.3 | SOT-23 Precision Micropower Series Voltage Reference |
| LM4128DMF-4.1 | SOT-23 Precision Micropower Series Voltage Reference |
| LM4128DMFX-1.8 | SOT-23 Precision Micropower Series Voltage Reference |
| LM4128DMFX-2.0 | SOT-23 Precision Micropower Series Voltage Reference |
| LM4128DMFX-2.5 | SOT-23 Precision Micropower Series Voltage Reference |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4128DMF-4.1 | 功能描述:基準電壓& 基準電流 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 |
| LM4128DMF-4.1/NOPB | 功能描述:基準電壓& 基準電流 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 |
| LM4128DMFX-1.8 | 功能描述:基準電壓& 基準電流 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 |
| LM4128DMFX-1.8/NOPB | 功能描述:基準電壓& 基準電流 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 |
| LM4128DMFX-2.0 | 功能描述:基準電壓& 基準電流 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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