TLE2425MDR

Overview

The TLE2425MDR is a precision virtual ground reference IC from Texas Instruments, designed for single-supply analog systems. It integrates a micropower voltage reference and a high-performance operational amplifier into a single silicon chip. The device provides a fixed 2.5 V output with an input voltage range of 4 V to 40 V. It operates within an extended temperature range of -55°C to 125°C. Key electrical characteristics include a typical bias current of 170 µA, an output impedance of 7.5 mΩ, and a short-circuit current capability of ±50 mA. The component is housed in an 8-pin Small Outline (D) package.

Feature Summary

• Integrates a precision micropower voltage reference and a high-performance operational amplifier on a single chip to eliminate external components typically required for virtual ground generation.
• Provides excellent regulation characteristics with low output impedance and high ripple rejection, ensuring stable performance under varying load and input conditions.
• Features high output-current capability allowing the device to sink or source significant current while maintaining signal accuracy and dynamic range.

Applications

• Signal-conditioning front ends for data acquisition systems requiring precise termination of signal grounds.
• Single-supply analog systems needing a stable reference voltage for ADC and DAC interfacing.
• Circuits requiring improved signal-to-noise ratio and lower distortion compared to resistor-capacitor solutions.

Procurement Notes

Verify the specific suffix 'MDR' corresponds to the industrial/extended temperature grade (-55°C to 125°C) and the SOIC-8 tape-and-reel packaging configuration. Confirm that the 'M' suffix denotes the extended temperature range and 'DR' indicates the reel packaging as per the manufacturer's ordering information. Ensure compatibility with the intended operating environment and assembly process requirements.

Selection Notes

Select this component when designing single-supply analog circuits that require a robust, low-impedance virtual ground without the complexity of discrete op-amp and reference combinations. The M-suffix variant is appropriate for applications operating in extreme cold or high-temperature environments. Consider the 4 V to 40 V input voltage range and the 2.5 V output level when defining system power rails and signal swing requirements.

Part Context

The TLE2425 series serves as a dedicated solution for creating precision virtual grounds in analog signal paths. Unlike general-purpose voltage references, this device combines regulation with buffering to drive loads directly. The MD variant specifically addresses reliability needs in harsh thermal environments, distinguishing it from commercial (C) and industrial (I) temperature grades within the same product family.

Replacement Considerations

TLE2425MD

FAQ

What is the function of the unused pins on the TLE2425MDR?

Pins 4, 5, 6, and 7 are internally unconnected (NC). They do not affect device operation but should be handled according to standard PCB layout practices for unused pins.

How does the TLE2425MDR improve system accuracy compared to traditional resistor-divider virtual grounds?

It eliminates the high output impedance and noise associated with passive resistor networks by integrating a precision reference and a low-impedance buffer, thereby improving signal-to-noise ratio and reducing distortion in data acquisition systems.