Overview
The TLE2426IDRG4, produced by Texas Instruments, is a precision virtual ground device known as the 'Rail Splitter.' This component combines a high-performance, micropower operational amplifier and a precision-trimmed divider on a single silicon chip. It provides a precise output voltage that is always half the input voltage, making it ideal for applications requiring a stable and accurate virtual ground.
The TLE2426IDRG4 is designed to eliminate the need for conventional signal grounds that typically consist of resistors, capacitors, operational amplifiers, and voltage references, thus saving board space and enhancing system performance.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage (VI) | 4 | 40 | V | |
| Operating Free-Air Temperature (TA) | −40 | 125 | °C | |
| Output Voltage (VO) at VI = 5 V | 2.48 | 2.5 | 2.52 | V |
| Output Voltage (VO) at VI = 40 V | 19.8 | 20 | 20.2 | V |
| Supply Current (No Load) | 170-300 | µA | ||
| Sink and Source Current Capability | ±20 | mA | ||
| Output Impedance | 7.5-22.5 | mΩ | ||
| Noise-Reduction Impedance | 110 | kΩ | ||
| Output Noise Voltage (rms) at CNR = 1 µF | 30 | µV |
Key Features
- Precision Virtual Ground: Provides an output voltage that is always half the input voltage, ensuring a precise VO/VI ratio of 0.5.
- Low-Impedance Output: Capable of sinking and sourcing up to 20 mA of current while maintaining low output impedance.
- Low Power Consumption: Draws less than 280 µA of supply current over the full input range.
- Noise Reduction: Optional noise-reduction pin and external capacitor (CNR) to reduce peak-to-peak noise and improve line ripple rejection.
- High Accuracy: Initial output tolerance better than 1% over the full 40-V input range, with ripple rejection exceeding 12 bits of accuracy.
- Compact Packaging: Available in space-saving 3-terminal LP package and 8-pin packages for increased performance.
Applications
- Data Acquisition Front End: Ideal for precision voltage references in data acquisition systems.
- Analog Signal Termination: Used for accurate termination of analog signals.
- Precision Voltage Reference: Provides a stable and accurate voltage reference for various applications.
- System Error Reduction: Eliminates major sources of system error by providing a precise virtual ground.
Q & A
- What is the TLE2426IDRG4 used for?
The TLE2426IDRG4 is used as a precision virtual ground, providing an output voltage that is half the input voltage. It is ideal for applications such as data acquisition front ends, analog signal termination, and precision voltage references.
- What is the input voltage range of the TLE2426IDRG4?
The input voltage range of the TLE2426IDRG4 is from 4 V to 40 V.
- How much current can the TLE2426IDRG4 sink and source?
The TLE2426IDRG4 can sink and source up to 20 mA of current.
- What is the typical supply current of the TLE2426IDRG4?
The typical supply current of the TLE2426IDRG4 is less than 280 µA over the full input range.
- How does the TLE2426IDRG4 reduce noise?
The TLE2426IDRG4 reduces noise through an optional noise-reduction pin and an external capacitor (CNR), which improves line ripple rejection and reduces peak-to-peak noise.
- What is the output impedance of the TLE2426IDRG4?
The output impedance of the TLE2426IDRG4 is typically between 7.5 mΩ and 22.5 mΩ.
- What are the typical operating temperatures for the TLE2426IDRG4?
The typical operating temperatures for the TLE2426IDRG4 range from −40°C to 125°C.
- What is the accuracy of the output voltage tolerance for the TLE2426IDRG4?
The initial output tolerance for the TLE2426IDRG4 is better than 1% over the full 40-V input range.
- How does the TLE2426IDRG4 improve system performance?
The TLE2426IDRG4 improves system performance by providing a precise virtual ground, reducing system error, and offering high accuracy and low noise.
- What are the available package options for the TLE2426IDRG4?
The TLE2426IDRG4 is available in various packages, including 3-terminal LP packages and 8-pin packages for increased performance.
- What is the ripple rejection capability of the TLE2426IDRG4?
The ripple rejection of the TLE2426IDRG4 exceeds 12 bits of accuracy.
