TLE2425

ACTIVE

Precision Virtual Ground

Product details

Iout (typ) (A) 0.05 Vs (min) (V) 4 Vs (max) (V) 40 Operating temperature range (°C) -55 to 125 Rating Automotive, Catalog
Iout (typ) (A) 0.05 Vs (min) (V) 4 Vs (max) (V) 40 Operating temperature range (°C) -55 to 125 Rating Automotive, Catalog
SOIC (D) 8 29.4 mm² 4.9 x 6 SOP (PS) 8 48.36 mm² 6.2 x 7.8 TO-92 (LP) 3 19.136 mm² 5.2 x 3.68
  • 2.5-V Virtual Ground for 5-V/GND Analog Systems
  • High Output-Current Capability Sink or Source . . . 20 mA Typ
  • Micropower Operation . . . 170 uA Typ
  • Excellent Regulation Characteristics
    • Output Regulation
         –45 uV Typ at IO = 0 to –10 mA
         +15 uV Typ at IO = 0 to +10 mA
    • Input Regulation = 1.5 uV/V Typ
  • Low-Impedance Output . . . 0.0075 Typ
  • Macromodel Included

  • 2.5-V Virtual Ground for 5-V/GND Analog Systems
  • High Output-Current Capability Sink or Source . . . 20 mA Typ
  • Micropower Operation . . . 170 uA Typ
  • Excellent Regulation Characteristics
    • Output Regulation
         –45 uV Typ at IO = 0 to –10 mA
         +15 uV Typ at IO = 0 to +10 mA
    • Input Regulation = 1.5 uV/V Typ
  • Low-Impedance Output . . . 0.0075 Typ
  • Macromodel Included

In signal-conditioning applications using a single power source, a reference voltage is required for termination of all signal grounds. To accomplish this, engineers have typically used solutions consisting of resistors, capacitors, operational amplifiers, and voltage references. Texas Instruments has eliminated all of those components with one easy-to-use 3-terminal device. That device is the TLE2425 precision virtual ground.

Use of the TLE2425 over other typical circuit solutions gives the designer increased dynamic signal range, improved signal-to-noise ratio, lower distortion, improved signal accuracy, and easier interfacing to ADCs and DACs. These benefits are the result of combining a precision micropower voltage reference and a high-performance precision operational amplifier in a single silicon chip. It is the precision and performance of these two circuit functions together that yield such dramatic system-level performance.

The TLE2425 improves input regulation as well as output regulation and, in addition, reduces output impedance and power dissipation in a majority of virtual-ground-generation circuits. Both input regulation and load regulation exceed 12 bits of accuracy on a single 5-V system. Signal-conditioning front ends of data acquisition systems that push 12 bits and beyond can use the TLE2425 to eliminate a major source of system error.

In signal-conditioning applications using a single power source, a reference voltage is required for termination of all signal grounds. To accomplish this, engineers have typically used solutions consisting of resistors, capacitors, operational amplifiers, and voltage references. Texas Instruments has eliminated all of those components with one easy-to-use 3-terminal device. That device is the TLE2425 precision virtual ground.

Use of the TLE2425 over other typical circuit solutions gives the designer increased dynamic signal range, improved signal-to-noise ratio, lower distortion, improved signal accuracy, and easier interfacing to ADCs and DACs. These benefits are the result of combining a precision micropower voltage reference and a high-performance precision operational amplifier in a single silicon chip. It is the precision and performance of these two circuit functions together that yield such dramatic system-level performance.

The TLE2425 improves input regulation as well as output regulation and, in addition, reduces output impedance and power dissipation in a majority of virtual-ground-generation circuits. Both input regulation and load regulation exceed 12 bits of accuracy on a single 5-V system. Signal-conditioning front ends of data acquisition systems that push 12 bits and beyond can use the TLE2425 to eliminate a major source of system error.

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Technical documentation

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Type Title Date
* Data sheet Precision Virtual Grounds datasheet (Rev. D) 30 Apr 2002
Application note Using References to Generate Offsets for the TLC55xx Family Data Converters (Rev. A) 29 Jul 2002
Application note Choosing an ADC and Op Amp for Minimum Offset 28 Oct 1999

Design & development

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Simulation model

TLE2425 PSpice Model (Rev. B)

SLFJ003B.ZIP (19 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
SOP (PS) 8 Ultra Librarian
TO-92 (LP) 3 Ultra Librarian

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