Overview
The TLE2426CDG4, produced by Texas Instruments, is a precision virtual ground device known as a "rail splitter." This component provides a reference voltage that is exactly half the input voltage, making it ideal for signal-conditioning applications that use a single power source. The TLE2426 combines a high-performance, micropower operational amplifier and a precision-trimmed divider on a single silicon chip, ensuring a precise VO/VI ratio of 0.5 while sinking and sourcing current. This device is particularly useful in applications where board space is limited, as it replaces conventional signal ground configurations that require multiple components like resistors, capacitors, operational amplifiers, and voltage references.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range (VI) | 4 | - | 40 | V |
| Operating Temperature Range (TA) | 0 | - | 70 | °C |
| Supply Current (No Load) | - | 170-300 | 400 | µA |
| Output Voltage Regulation (IO = 0 to ±10 mA) | -45 | - | +15 | µV |
| Output Impedance | - | 7.5 | 22.5 | mΩ |
| Sink and Source Current Capability | - | 20 | - | mA |
| Package Type | - | SOIC (D), 8 Pins | - | - |
Key Features
- Precision virtual ground with VO/VI ratio of 0.5, ensuring the output voltage is always half the input voltage.
- Micropower operation with a supply current of less than 280 µA over the full input range.
- High output-current capability, sourcing and sinking up to 20 mA.
- Excellent output regulation with low output impedance (typically 7.5 mΩ).
- Noise reduction pin available in 8-pin packages, improving line ripple rejection with an external capacitor (CNR).
- Available in various packages, including SOIC (D), ceramic DIP (JG), plastic DIP (P), and others.
Applications
- Data acquisition front ends: Provides a precise voltage reference for analog signal conditioning.
- Analog signal termination: Ensures accurate termination of analog signals using a single power source.
- Precision voltage reference: Eliminates system errors by providing a stable and precise voltage reference.
Q & A
- What is the primary function of the TLE2426CDG4?
The TLE2426CDG4 acts as a precision virtual ground, providing an output voltage that is exactly half the input voltage, making it useful for signal-conditioning applications.
- What is the input voltage range for the TLE2426CDG4?
The input voltage range is from 4 V to 40 V.
- How much current can the TLE2426CDG4 source and sink?
The device can source and sink up to 20 mA of current.
- What is the typical supply current of the TLE2426CDG4?
The typical supply current is less than 280 µA over the full input range.
- What is the output impedance of the TLE2426CDG4?
The output impedance is typically 7.5 mΩ.
- How does the noise reduction feature work in the TLE2426CDG4?
The noise reduction feature involves an external capacitor (CNR) in the 8-pin packages, which reduces peak-to-peak noise and improves line ripple rejection.
- What are the common applications of the TLE2426CDG4?
Common applications include data acquisition front ends, analog signal termination, and precision voltage references.
- What are the available package options for the TLE2426CDG4?
The device is available in various packages such as SOIC (D), ceramic DIP (JG), plastic DIP (P), and others.
- What is the operating temperature range for the TLE2426CDG4?
The operating temperature range is from 0°C to 70°C for the C-suffix devices.
- How accurate is the output voltage regulation of the TLE2426CDG4?
The output voltage regulation is excellent, with initial output tolerance better than 1% for single 5-V or 12-V systems and 3.6% over the full 40-V input range.
- What is the ripple rejection capability of the TLE2426CDG4?
The ripple rejection exceeds 12 bits of accuracy.
