Overview
The TLE2426CD, produced by Texas Instruments, is a precision virtual ground device known as a "rail splitter." This component is designed to provide a reference voltage that is exactly half the input voltage, making it ideal for signal-conditioning applications that require a single power source. The TLE2426CD combines a high-performance, micropower operational amplifier and a precision-trimmed divider on a single silicon chip, ensuring a precise output voltage ratio of 0.5 while sinking and sourcing current.
This device is particularly useful in applications where a conventional signal ground consisting of resistors, capacitors, operational amplifiers, and voltage references would be cumbersome. The TLE2426CD offers a space-saving, 3-terminal LP package and optional 8-pin packages with a noise-reduction pin for enhanced performance.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value |
|---|---|---|---|
| Input Voltage Range (VI) | 4 V to 40 V | 4 V | 40 V |
| Output Voltage (VO) at VI = 5 V | 2.5 V | 2.48 V | 2.52 V |
| Supply Current (No Load) at VI = 5 V | 170 µA | 170 µA | 300 µA |
| Output Current Capability | 20 mA (Source and Sink) | - | - |
| Output Voltage Regulation (Sourcing Current) | -45 µV (IO = 0 to -10 mA) | -45 µV | -160 µV |
| Output Voltage Regulation (Sinking Current) | 15 µV (IO = 0 to 10 mA) | 15 µV | 160 µV |
| Output Impedance | 0.0075 Ω | - | - |
| Operating Temperature Range | 0°C to 70°C (C Suffix) | -40°C to 85°C (I Suffix) | -55°C to 125°C (M Suffix) |
Key Features
- Precision Virtual Ground: Provides an output voltage that is always half the input voltage.
- Micropower Operation: Typical supply current of 170 µA at VI = 5 V.
- Wide Input Voltage Range: Operates from 4 V to 40 V.
- High Output-Current Capability: Can source and sink up to 20 mA.
- Excellent Output Regulation: Tight output voltage regulation with minimal variation over current range.
- Low-Impedance Output: Output impedance of 0.0075 Ω typical.
- Noise Reduction Pin: Available in D, JG, and P packages to reduce peak-to-peak noise and improve line ripple rejection.
- Space-Saving Package: Available in 3-terminal LP package and optional 8-pin packages.
Applications
- Data Acquisition Front End: Provides a precise reference voltage for data acquisition systems.
- Analog Signal Termination: Ideal for terminating analog signals in single-supply systems.
- Precision Voltage Reference: Used as a precision voltage reference in various analog circuits.
- Signal Conditioning: Essential in signal-conditioning applications requiring a stable and precise virtual ground.
Q & A
- What is the primary function of the TLE2426CD?
The TLE2426CD acts as a precision virtual ground, providing an output voltage that is exactly half the input voltage.
- What is the input voltage range of the TLE2426CD?
The input voltage range is from 4 V to 40 V.
- How much current can the TLE2426CD source and sink?
The device can source and sink up to 20 mA.
- What is the typical supply current of the TLE2426CD at 5 V input?
The typical supply current is 170 µA at VI = 5 V.
- What is the output impedance of the TLE2426CD?
The output impedance is 0.0075 Ω typical.
- Does the TLE2426CD have a noise reduction feature?
- What are the operating temperature ranges for the TLE2426CD?
The operating temperature ranges are 0°C to 70°C (C Suffix), -40°C to 85°C (I Suffix), and -55°C to 125°C (M Suffix).
- In what packages is the TLE2426CD available?
The device is available in 3-terminal LP package and optional 8-pin packages.
- What are some common applications of the TLE2426CD?
- How does the TLE2426CD improve system performance?
