TLE2426 Q1 THE RAIL SPLITTER" PRECISION VIRTUAL GROUND
SGLS252A -AUGUST 2004 -REVISED JUNE 2008 D Qualified for Automotive Applications D 1/2 VI Virtual Ground for Analog Systems D Micropower Operation . 170 µA Typ, D D D D D
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 Typ Noise Reduction Pin D PACKAGE (TOP VIEW) OUT COMMON IN NC 1 2 3 4 8 7 6 5 NOISE REDUCTION NC NC NC NC -No internal connection INPUT/OUTPUT TRANSFER CHARACTERISTICS
10 VI 8 VI VO V V + I O 2 description
Voltage -V 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. 6 4 VO 2 The unique combination of a high-performance, micropower operational amplifier and a precision0 trimmed divider on a single silicon chip results in 0 0.25 0.5 0.75 1 a precise VO/VI ratio of 0.5 while sinking and t -Time -s 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. ORDERING INFORMATION{
TA PACKAGE} ORDERABLE PART NUMBER TOP-SIDE MARKING -40°C to 125°C SOIC (D) Tape and Reel TLE2426QDRQ1 2426Q1 For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at http://www.ti.com. Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging. Please be aware that an important notice concerning availability, sta …
