Overview
The TLE2426CDR, produced by Texas Instruments, is a precision virtual ground device known as the 'Rail Splitter.' It provides a reference voltage that is always equal to one-half the input voltage, making it ideal for signal-conditioning applications that utilize a single power source. This device combines a high-performance, micropower operational amplifier and a precision-trimmed divider on a single silicon chip, ensuring a precise output voltage to input voltage ratio of 0.5 while sinking and sourcing current.
The TLE2426CDR is designed to replace conventional signal ground configurations that typically require resistors, capacitors, operational amplifiers, and voltage references, thus saving board space and enhancing system performance. It operates over a wide input voltage range of 4 V to 40 V and draws less than 280 µA of supply current, making it highly efficient.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4 to 40 | V |
| Output Voltage Regulation (Sourcing Current) | -45 to +15 µV (Typ at IO = 0 to ±10 mA) | µV |
| Output Current Capability | 20 mA (Typ) Sink and Source | mA |
| Supply Current | < 280 µA (Typ at VI = 5 V) | µA |
| Output Impedance | 0.0075 Ω (Typ) | 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) | °C |
| Package Type | SOIC (D), Ceramic DIP (JG), Plastic DIP (LP), etc. |
Key Features
- Virtual Ground for Analog Systems: Provides a reference voltage equal to one-half the supply voltage.
- Micropower Operation: Draws less than 280 µA of supply current over the full input range.
- High Output-Current Capability: Sources and sinks up to 20 mA of current.
- Excellent Output Regulation: Maintains precise output voltage regulation with minimal deviation.
- Low-Impedance Output: Offers a low output impedance of 0.0075 Ω (Typ).
- Noise Reduction Pin: Available in certain packages to reduce peak-to-peak noise and improve line ripple rejection with an external capacitor.
- Space-Saving Packages: Available in various packages including 3-terminal TO-226AA and 8-pin packages.
Applications
The TLE2426CDR is versatile and can be used in various applications, including:
- Data Acquisition Front End: Provides a precise reference voltage for data acquisition systems.
- Analog Signal Termination: Terminates analog signal grounds effectively.
- Precision Voltage Reference: Acts as a reliable voltage reference in analog circuits.
Q & A
- What is the primary function of the TLE2426CDR?
The TLE2426CDR acts as a precision virtual ground, providing a reference voltage that is always equal to one-half the input voltage.
- What is the input voltage range of the TLE2426CDR?
The input voltage range is from 4 V to 40 V.
- How much current can the TLE2426CDR source and sink?
The device can source and sink up to 20 mA of current.
- What is the typical supply current of the TLE2426CDR?
The typical supply current is less than 280 µA at an input voltage of 5 V.
- What is the output impedance of the TLE2426CDR?
The output impedance is typically 0.0075 Ω.
- What are the available package types for the TLE2426CDR?
Available packages include SOIC (D), Ceramic DIP (JG), Plastic DIP (LP), and others.
- How does the noise reduction pin work?
The noise reduction pin, available in certain packages, reduces peak-to-peak noise and improves line ripple rejection when used with an external capacitor.
- What are the operating temperature ranges for different suffix devices?
The C suffix devices operate from 0°C to 70°C, I suffix devices from -40°C to 85°C, and M suffix devices from -55°C to 125°C.
- What are some common applications of the TLE2426CDR?
Common applications include data acquisition front ends, analog signal termination, and precision voltage references.
- How does the TLE2426CDR improve system performance?
The device eliminates a major source of system error by providing a precise and stable reference voltage, thus enhancing overall system performance and accuracy.
