TLE2425CD

Overview

The TLE2425CD is a precision virtual ground integrated circuit manufactured by Texas Instruments, designed for single-supply analog systems. It provides a stable 2.5V reference voltage to split a power supply rail, typically used in 5V/GND configurations. The device integrates a micropower voltage reference and a high-performance operational amplifier on a single silicon chip. It operates within an input voltage range of 4V to 40V and supports an operating temperature range from 0°C to 70°C. Key electrical characteristics include a typical output current capability of 20mA, a bias current of 170µA, and a temperature coefficient of 20ppm/°C.

Feature Summary

• Eliminates the need for external resistors, capacitors, and discrete operational amplifiers required for traditional virtual ground generation.
• Provides increased dynamic signal range and improved signal-to-noise ratio compared to standard resistor-capacitor divider solutions.
• Features excellent regulation characteristics with low output impedance and minimal drift over temperature variations.
• Includes a macromodel for accurate circuit simulation and system-level performance prediction.

Applications

• Signal-conditioning front ends for data acquisition systems requiring precise grounding.
• Interfacing with Analog-to-Digital Converters (ADCs) and Digital-to-Analog Converters (DACs).
• Single-supply operational amplifier circuits requiring a mid-rail reference point.

Procurement Notes

Verify the specific suffix 'CD' corresponds to the commercial temperature range (0°C to 70°C) and SOIC-8 package. Confirm RoHS compliance status and lead finish details via the latest Package Option Addendum. Ensure design requirements match the absolute maximum ratings, particularly regarding continuous input voltage and total power dissipation limits at elevated temperatures.

Selection Notes

Select the TLE2425CD when a fixed 2.5V virtual ground is sufficient for single-supply applications. Consider the TLE2426 series if adjustable voltage splitting or higher output current is required. Evaluate thermal dissipation ratings based on the expected load current and ambient temperature to ensure operation within safe limits. Verify that the 20mA typical sink/source capability meets the system's peak current demands.

Part Context

The TLE2425 family consists of precision virtual ground devices that combine a voltage reference and an op amp. The 'C' suffix denotes the commercial temperature grade, while 'D' indicates the Small Outline Integrated Circuit (SOIC) package. This component simplifies analog circuit design by replacing complex discrete networks with a single three-terminal device, enhancing accuracy and reducing board space.

Replacement Considerations

TLE2425ID: Industrial temperature range (-40°C to 85°C), same SOIC package.

FAQ

What is the primary function of the TLE2425CD?

It acts as a precision virtual ground, providing a stable 2.5V reference point to split a single power supply rail for analog signal processing.

How does the TLE2425CD improve system performance?

It offers lower distortion, better signal accuracy, and improved signal-to-noise ratio compared to traditional resistor-divider virtual ground circuits.