Qualified for Automotive Applications

1/2 VI Virtual Ground for Analog Systems

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

− −102 μV Typ at IO = 0 to −10 mA

− +49 μV Typ at IO = 0 to +10 mA

Low-Impedance Output . . . 0.0075 Ω Typ

Noise Reduction Pin

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 precisiontrimmed

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 280 μA of supply current over the full input range of 4 V to 40 V. 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. For increased performance, the 8-pin package

provides 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% 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.