TLE2425
- 2.5-V Virtual Ground for 5-V/GND Analog Systems
- High Output-Current Capability Sink or Source . . . 20 mA Typ
- Micropower Operation . . . 170 uA Typ
- Excellent Regulation Characteristics
- Output Regulation
–45 uV Typ at IO = 0 to –10 mA
+15 uV Typ at IO = 0 to +10 mA - Input Regulation = 1.5 uV/V Typ
- Output Regulation
- Low-Impedance Output . . . 0.0075 Typ
- Macromodel Included
In signal-conditioning applications using a single power source, a reference voltage is required for termination of all signal grounds. To accomplish this, engineers have typically used solutions consisting of resistors, capacitors, operational amplifiers, and voltage references. Texas Instruments has eliminated all of those components with one easy-to-use 3-terminal device. That device is the TLE2425 precision virtual ground.
Use of the TLE2425 over other typical circuit solutions gives the designer increased dynamic signal range, improved signal-to-noise ratio, lower distortion, improved signal accuracy, and easier interfacing to ADCs and DACs. These benefits are the result of combining a precision micropower voltage reference and a high-performance precision operational amplifier in a single silicon chip. It is the precision and performance of these two circuit functions together that yield such dramatic system-level performance.
The TLE2425 improves input regulation as well as output regulation and, in addition, reduces output impedance and power dissipation in a majority of virtual-ground-generation circuits. Both input regulation and load regulation exceed 12 bits of accuracy on a single 5-V system. Signal-conditioning front ends of data acquisition systems that push 12 bits and beyond can use the TLE2425 to eliminate a major source of system error.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | Precision Virtual Grounds 数据表 (Rev. D) | 2002年 4月 30日 | |||
应用手册 | Using References to Generate Offsets for the TLC55xx Family Data Converters (Rev. A) | 2002年 7月 29日 | ||||
应用手册 | Choosing an ADC and Op Amp for Minimum Offset | 1999年 10月 28日 |
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