The 'Rail Splitter' Precision Virtual Ground - TLE2426

TLE2426 (ACTIVE)

The 'Rail Splitter' Precision Virtual Ground

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 280uA

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.

The C-suffix devices are characterized for operation from 0°C to 70°C. The I suffix devices are characterized for operation from -40°C to 85°C. The M suffix devices are characterized over the full military temperature range of -55°C to 125°C.

Features

  • 1/2 VI Virtual Ground for Analog Systems
  • Self-Contained 3-terminal TO-226AA Package
  • Micropower Operation...170 uA 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 uV Typ at IO = 0 to -10 mA
    • +15 uV Typ at IO = 0 to +10 mA
  • Low-Impedance Output...0.0075 Ω Typ
  • Noise Reduction Pin (D, JG, and P Packages Only)

View more

Parametrics Compare all products in Special Functions

 
Operating Temperature Range (C)
Approx. Price (US$)
Rating
Pin/Package
Special Function
TLE2426 TLE2426-EP TLE2426-Q1
-55 to 125     -55 to 125     -40 to 125    
    0.65 | 1ku    
Military     HiRel Enhanced Product     Automotive    
3TO-92
8PDIP
8SOIC    
8SOIC     8SOIC    
Yes       Yes    

Other qualified versions of TLE2426

Version Part Number Definition
Enhanced Product TLE2426-EP Supports Defense, Aerospace and Medical Applications
Automotive TLE2426-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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