TLE2426EP

RAIL SPLITTER

PRECISION VIRTUAL GROUND

SGLS345 − JUNE 2006

1

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

D Controlled Baseline

− One Assembly/Test Site, One Fabrication

Site

D Extended Temperature Performance of

−55

°C to 125°C

D Enhanced Diminishing Manufacturing

Sources (DMS) Support

D Enhanced Product-Change Notification

D Qualification Pedigree†

D One-Half VI Virtual Ground for Analog

Systems

D Micropower Operation . . . 170 µA Typ,

VI = 5 V

D Wide VI Range ...4 V to 40 V

D High Output-Current Capability

− Source . . . 20 mA Typ

− Sink . . . 20 mA Typ

D Excellent Output Regulation

− −102

µV Typ at IO = 0 mA to −10 mA

− 49

µV Typ at IO = 0 mA to 10 mA

D Low-Impedance Output . . . 0.0075 Ω Typ

D Noise Reduction Pin

† Component qualification in accordance with JEDEC and industry

standards to ensure reliable operation over an extended

temperature range. This includes, but is not limited to, Highly

Accelerated Stress Test (HAST) or biased 85/85, temperature

cycle, autoclave or unbiased HAST, electromigration, bond

intermetallic life, and mold compound life. Such qualification

testing should not be viewed as justifying use of this component

beyond specified performance and environmental limits.

−

description/ordering information

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. TI

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 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.

Copyright

 2006 Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

1

2

3

4

8

7

6

5

OUT

COMMON

IN

NC

NOISE REDUCTION

NC

NC

NC

D PACKAGE

(TOP VIEW)

NC − No internal connection

VO

VI

4

2

0

8

6

0

0.25

0.5

0.75

1

INPUT/OUTPUT TRANSFER CHARACTERISTICS

10

V

O +

V

I

2

VI

VO

t − Time − s