TLE2426-Q1 Datasheet, PDF (1/15 Pages) Texas Instruments – THE "RAIL SPLITTER" PRECISION VIRTUAL GROUND

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TLE2426ĆQ1
THE RAIL SPLITTER"
PRECISION VIRTUAL GROUND
SGLS252A − AUGUST 2004 − REVISED JUNE 2008
D Qualified for Automotive Applications
D 1/2 V_I Virtual Ground for Analog Systems
D Micropower Operation . . . 170 µA Typ,
V_I = 5 V
D Wide V_I 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 I_O = 0 to −10 mA
− +49 µV Typ at I_O = 0 to + 10 mA
D Low-Impedance Output . . . 0.0075 Ω Typ
D Noise Reduction Pin
D PACKAGE
(TOP VIEW)
OUT 1
COMMON 2
IN 3
NC 4
8 NOISE REDUCTION
7 NC
6 NC
5 NC
NC − No internal connection
INPUT/OUTPUT TRANSFER CHARACTERISTICS
10
VI
8
VI
VO
VO
+
VI
2
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.
6
4
VO
2
The unique combination of a high-performance,
micropower operational amplifier and a precision-
trimmed divider on a single silicon chip results in
a precise V_O/V_I ratio of 0.5 while sinking and
sourcing current. The TLE2426 provides a
0
0
0.25
0.5
0.75
1
t − Time − s
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 (C_NR), 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, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
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Copyright  2008 Texas Instruments Incorporated
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