TLE2426IDR Precision Virtual Ground Reference IC with ±0.05% Accuracy 1mA Output 1.4V to 40V Wide Input Low TC (35ppm/°C) and Short-Circuit Protection for Single-Supply Systems

Features

1/2 VI Virtual Ground for Analog Systems

Self-Contained 3-terminal TO-226AA Package

Micropower Operation...170 µA Typ, VI = 5 V

Wide VI Range...4 V to 40 V

High Output-Current Capability

− Source...20 mA Typ

− Sink...20 mA Typ

Excellent Output Regulation

− −45 µV Typ at IO = 0 to −10 mA

− +15 µV Typ at IO = 0 to +10 mA

Low-Impedance Output...0.0075 Ω Typ

Noise Reduction Pin (D, JG, and P Packages Only)

Applications

1. single-supply op-Amp circuits
Generates a virtual ground (VCC/2) for single-supply operational amplifiers (e.g. TLE202x, TLV series), eliminating the need for dual power supplies.
Typical Use Cases: Signal conditioning, sensor interfaces, audio pre-amplification.

2. Data Acquisition Systems (DAQ)
Provides a stable mid-rail reference for ADC/DAC circuits, enabling bipolar signal swing (e.g.+2.5V from a 5V single supply).
Typical Use Cases: Industrial sensors, biomedical instruments.

3.Portable/Battery-Powered Devices
Low quiescent current (400uA) and wide input voltage range (1.4V to 40v) make it ideal for battery-operated applications with voltage fluctuations.
Typical Use Cases: Handheld meters, wireless sensor nodes.

4. Automotive Electronics
AEC-Q100 qualified for reliable performance in high-temperature and high-vibration environments, suitable for vehicle power management and sensor signal processing.

5. Test & Measurement Equipment
High accuracy (+0.05%) and low temperature drift (35ppm/°C) ensure stable voltage references in multimeters, oscilloscopes, and other precision instruments.

Description

In signal-conditioning applications utilizing a single power source, a reference voltage equal to one-half the supply voltage is required for termination of all analog signal grounds. Texas Instruments presents a precision virtual ground whose output voltage is always equal to one-half the input voltage, the TLE2426 “rail splitter.”

The unique combination of a high-performance, micropower operational amplifier and a precision trimmed divider on a single silicon chip results in a precise VO/VI ratio of 0.5 while sinking and sourcing current. The TLE2426 provides a low impedance output with 20 mA of sink and source capability while drawing less than 280µA of supply current over the full input range of 4V to 40V. A designer need not pay the price in terms of board space for a conventional signal ground consisting of resistors, capacitors, operational amplifiers, and voltage references. The performance and precision of the TLE2426 is available in an easy-to-use, space saving, 3-terminal LP package. For increased performance, the optional 8-pin packages provide a noise-reduction pin. With the addition of an external capacitor (CNR), peak-to-peak noise is reduced while line ripple rejection is improved.

Initial output tolerance for a single 5-V or 12-V system is better than 1% with 3.6% over the full 40-V input range. Ripple rejection exceeds 12 bits of accuracy. Whether the application is for a data acquisition front end, analog signal termination, or simply a precision voltage reference, the TLE2426 eliminates a major source of system error.

INFORMATION

Drawing

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