LM4140
- High Initial Accuracy: 0.1%
- Ultra-Low Noise
- Low Temperature Coefficient: 3 ppm/°C (A Grade)
- Low Voltage Operation: 1.8V
- Low Dropout Voltage: 20 mV (Typical) at 1mA
- Supply Current: 230 µA (Typical), ≤ 1 µA Disable Mode
- Enable Pin
- Output Voltage Options: 1.024 V, 1.25 V, 2.048 V, 2.5 V, and 4.096 V
- Custom Voltages From 0.5 V to 4.5 V
- Temperature Range: 0°C to 70°C
The LM4140 series of precision references are designed to combine high accuracy, low drift, and noise with low power dissipation in a small package.
The LM4140 is the industry’s first reference with output voltage options lower than the bandgap voltage.
The key to the advance performance of the LM4140 is the use of EEPROM registers and CMOS DACs for temperature coefficient curvature correction and trimming of the output voltage accuracy of the device during the final production testing.
The major advantage of this method is the much higher resolution available with DACs than is available economically with most methods used by other bandgap references.
The low input and dropout voltage, low supply current, and output drive capability of the LM4140 makes this product an ideal choice for battery powered and portable applications.
The LM4140 is available in three grades (A, B, C) with 0.1% initial accuracy and 3, 6, and 10 ppm/°C temperature coefficients. For even lower temperature coefficients, contact Texas Instruments.
The device performance is specified over the temperature range 0°C to 70°C, and is available in compact 8-pin package.
For other output voltage options from 0.5 V to 4.5 V, contact Texas Instruments.
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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM4140 High Precision Low Noise Low Dropout Voltage Reference datasheet (Rev. F) | PDF | HTML | 2016年 9月 16日 |
| E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 2019年 6月 28日 | ||
| White paper | Voltage reference selection basics white paper (Rev. A) | 2018年 10月 23日 | ||
| Technical article | Find the 'Goldilocks' voltage reference for your application | PDF | HTML | 2016年 9月 2日 | |
| More literature | How to Select the Right Voltage Reference (Rev. A) | 2015年 6月 30日 | ||
| Application note | AN-1559 Practical RTD Interface Solutions (Rev. B) | 2013年 5月 1日 | ||
| Application note | AN-1852 Designing With pH Electrodes (Rev. A) | 2013年 5月 1日 | ||
| Application note | Improving Machinery Vibration Analysis | 2006年 7月 7日 | ||
| White paper | A precision interface for a Resistance Temperature Detector (RTD) | 2004年 12月 1日 |
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