Texas Instruments TLE2425CDR

Overview

TLE2425CDR from Texas Instruments is a precision 2.5-V virtual ground generator IC designed for single-supply 5-V analog signal-conditioning systems. It integrates a micropower voltage reference and high-performance op-amp in one SOIC-8 package, delivering ±20 mA sink/source capability, 7.5 mΩ output impedance, and 170 µA typical quiescent current - enabling accurate mid-rail biasing for ADCs, DACs, and sensor interfaces.

For engineers reviewing the TLE2425CDR datasheet, TLE2425CDR pinout, TLE2425CDR application, or TLE2425CDR equivalent, key selection criteria include its 2.5 V ±20 mV output accuracy over 0°C to 70°C, ±10 mA load regulation of ±45 µV (sink) / −45 µV (source), 80 dB ripple rejection at 120 Hz, and compatibility with 4–40 V input range - critical for stable rail-splitting in data acquisition front ends.

Technical Context

The TLE2425CDR implements a monolithic precision architecture combining a bandgap voltage reference with a low-output-impedance buffer amplifier. Its internal design achieves <1.5 µV/V input regulation and <±45 µV output regulation across ±10 mA loads, supporting 12-bit+ system accuracy without external passive networks.

It operates as a three-terminal active virtual ground (IN, COMMON, OUT), where IN accepts 4–40 V, COMMON serves as system ground reference, and OUT delivers regulated 2.5 V. The device exhibits 100 µV_RMS noise (10 Hz–10 kHz) and 115 µs transient response to ±10 mA current steps with 100 pF load.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), 3.91 mm × 4.90 mm × 1.75 mm body, tape-and-reel (2500 pcs/reel), RoHS-compliant NiPdAu lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar virtual ground generation applications.

Compared with LM336Z-2.5 and REF3025AIDBZR, the TLE2425CDR uniquely integrates both reference and high-current buffer in one SOIC-8 package - eliminating external components, reducing layout sensitivity, and delivering guaranteed ±20 mA drive without stability concerns.

Availability

TLE2425CDR is available at Aetrix Electronics and suitable for industrial data acquisition, portable instrumentation, medical sensor interfaces, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for TLE2425CDR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision analog ICs and industrial-grade reliability.

The TLE2425CDR belongs to TI's precision voltage reference and rail-splitting IC product line, engineered specifically for high-accuracy, low-drift virtual ground generation in single-supply analog signal chains.

FAQ

What is the primary function of the TLE2425CDR in a circuit?

The TLE2425CDR functions as a precision 2.5-V virtual ground generator, providing a stable mid-rail reference point for analog signal conditioning in single-supply 5-V systems. It replaces discrete resistor dividers and op-amp buffers by integrating a micropower voltage reference and high-current buffer in one SOIC-8 IC - enabling accurate biasing of ADCs, DACs, and instrumentation amplifiers without external components. The TLE2425CDR maintains this 2.5 V output across ±20 mA loads and 4–40 V input variations.

Can the TLE2425CDR operate from a 3.3-V supply?

No, the TLE2425CDR requires a minimum input voltage of 4 V per its absolute maximum ratings and recommended operating conditions. At 3.3 V, the internal reference and amplifier cannot achieve proper regulation or output compliance. For 3.3-V systems, alternative solutions such as the REF3025 (with external buffer) or dedicated low-voltage rail-splitters like the TLE2426 (2.048 V version) should be evaluated. The TLE2425CDR is specified only for VI ≥ 4 V, with optimal performance at 5 V.

How does the TLE2425CDR handle capacitive loads on its output?

The TLE2425CDR is stable with up to 100 pF capacitive load, as verified in its datasheet transient response curves (Figure 13). Its output stage is internally compensated for this condition, delivering 115 µs settling to 0.1% after ±10 mA current steps. Larger capacitive loads (>100 pF) may cause overshoot or ringing due to phase margin degradation. For higher capacitance requirements, a small series resistor (e.g., 1–10 Ω) between the TLE2425CDR OUT pin and the load capacitor restores stability without compromising DC accuracy.

What is the significance of the NC pins on the TLE2425CDR SOIC-8 package?

The TLE2425CDR SOIC-8 package has five NC (no internal connection) pins (pins 2, 3, 4, 5, and 8), confirmed in the official TI datasheet pin diagram and package outline. These pins are physically present but unbonded - they serve no electrical function and must remain unconnected on the PCB. Routing traces to them, connecting to ground, or using them for thermal relief violates TI's design guidance and risks unpredictable behavior. The only functional pins are 1 (OUT), 6 (COMMON), and 7 (IN).

Does the TLE2425CDR support operation beyond its rated 0°C to 70°C temperature range?

No - the "C" suffix in TLE2425CDR denotes the commercial temperature grade (0°C to 70°C), and its electrical specifications (e.g., output voltage accuracy, load regulation, bias current) are only guaranteed within that range. While the device may function outside this window, parameters like temperature coefficient (20 ppm/°C) and output drift are not characterized beyond 70°C. For extended temperature operation, the TLE2425IDR (−40°C to 85°C) or TLE2425MDR (−55°C to 125°C) variants must be selected, as they undergo full characterization and screening across their respective ranges.