Texas Instruments TLE2426QDRQ1

Overview

TLE2426QDRQ1 from Texas Instruments is an automotive-qualified precision rail-splitter IC that generates a stable virtual ground at exactly ½ VI, enabling single-supply analog signal conditioning with ±20 mA sourcing/sinking capability, 7.5 mΩ typical output impedance, and 170 µA supply current at 5 V - deployed in data acquisition front ends and sensor signal termination circuits.

For engineers reviewing the TLE2426QDRQ1 datasheet, TLE2426QDRQ1 pinout, TLE2426QDRQ1 application, or TLE2426QDRQ1 equivalent, key selection criteria include its 4–40 V input range, −40°C to 125°C operation, noise-reduction pin support, 0.01% initial VO/VI accuracy at 5 V, and SOIC-8 packaging for automotive-grade analog biasing.

Technical Context

The TLE2426QDRQ1 integrates a micropower op amp with a laser-trimmed resistive divider on a single die to maintain precise VO = 0.5 × VI across temperature and load. Its internal architecture delivers high PSRR (>70 dB at 1 kHz) and low output impedance without external compensation under 100 pF capacitive loads.

It operates as a unity-gain, high-accuracy voltage follower with active feedback control, where the noise-reduction (NR) pin enables external capacitor filtering to reduce 10 Hz–10 kHz rms noise from 120 µV to 30 µV and improve ripple rejection beyond 12-bit effective resolution.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), 3.91 mm × 4.90 mm × 1.75 mm height, RoHS-compliant, MSL Level-1, rated for −40°C to 125°C ambient operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar rail-splitter applications.

Compared with LM334Z and TLE2426CDR, the TLE2426QDRQ1 uniquely combines AEC-Q100 qualification, integrated precision divider, noise-reduction pin, and ±20 mA drive in one SOIC-8 package - making it the sole option for production automotive analog biasing where reliability, accuracy, and board-level integration are mandatory.

Availability

TLE2426QDRQ1 is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial data acquisition modules, and portable medical monitors requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.

Supply support for TLE2426QDRQ1 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 automotive electronics, with decades of expertise in precision signal chain components.

The TLE2426QDRQ1 belongs to TI's automotive-qualified precision analog portfolio, designed specifically to replace discrete rail-splitter circuits in safety-critical and thermally demanding vehicle subsystems.

FAQ

What is the primary function of the TLE2426QDRQ1?

The TLE2426QDRQ1 is a precision rail-splitter IC that generates a stable virtual ground at exactly half the input supply voltage (VO = 0.5 × VI). It serves as a low-impedance, high-accuracy bias reference for single-supply analog circuits - eliminating the need for external resistor dividers and op-amps in applications like sensor signal conditioning and ADC reference design. Its architecture ensures consistent performance across the full 4–40 V input range and −40°C to 125°C operating temperature.

Does the TLE2426QDRQ1 require external components to operate?

The TLE2426QDRQ1 functions as a complete rail-splitter with no external components required for basic operation. However, connecting a 1 µF capacitor between the NOISE REDUCTION pin and ground reduces output noise from 120 µV to 30 µV rms and improves ripple rejection - a recommended practice for high-resolution data acquisition. The COMMON pin must be tied to system analog ground to ensure accurate VO/VI ratio tracking, and no pull-ups or bypass caps are needed on unused NC pins.

Can the TLE2426QDRQ1 drive capacitive loads?

Yes, the TLE2426QDRQ1 is stable with up to 100 pF of capacitive load at the output, as verified in the datasheet's stability characterization. For loads exceeding 100 pF, series resistance (typically 1–10 Ω) should be added between the OUT pin and the capacitor to maintain phase margin. The device's low 7.5 mΩ output impedance and internal compensation enable robust step response - achieving 0.1% settling in 275 µs with CL = 100 pF and ±10 mA load steps.

What is the purpose of the NOISE REDUCTION pin on the TLE2426QDRQ1?

The NOISE REDUCTION (NR) pin on the TLE2426QDRQ1 connects to an internal 110 kΩ resistor that forms a low-pass filter with an external capacitor. Adding a 1 µF capacitor here reduces 10 Hz–10 kHz rms output noise from 120 µV to 30 µV and improves power supply ripple rejection by >20 dB - critical for high-SNR applications like 16-bit+ ADC front ends. The NR pin does not affect DC accuracy or load regulation; it solely enhances AC performance without altering the core rail-splitting function of the TLE2426QDRQ1.

Is the TLE2426QDRQ1 pin-compatible with other TLE2426 variants?

Yes, the TLE2426QDRQ1 shares identical SOIC-8 (D package) pinout and electrical behavior with all TLE2426 family members, including TLE2426CDR and TLE2426IDR. The Q1 suffix denotes AEC-Q100 qualification and extended temperature rating (−40°C to 125°C), while the base functionality - pin assignments, VO/VI ratio, drive strength, and noise-reduction interface - remains fully consistent across variants. This allows drop-in replacement in existing layouts when upgrading to automotive-grade reliability.