TLE2425CLP Datasheet, PDF (1/22 Pages) Texas Instruments – PRECISION VIRTUAL GROUND

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D 2.5-V Virtual Ground for 5-V/GND Analog
Systems
D High Output-Current Capability
Sink or Source . . . 20 mA Typ
D Micropower Operation . . . 170 µA Typ
TLE2425
PRECISION VIRTUAL GROUND
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SLOS065D − MARCH 1991 − REVISED APRIL 2002
D Excellent Regulation Characteristics
− Output Regulation
−45 µV Typ at I_O = 0 to −10 mA
+15 µV Typ at I_O = 0 to + 10 mA
− Input Regulation = 1.5 µV/V Typ
D Low-Impedance Output . . . 0.0075 Ω Typ
D Macromodel Included
description
OUTPUT REGULATION
In signal-conditioning applications using a single
power source, a reference voltage is required for
termination of all signal grounds. To accomplish
this, engineers have typically used solutions
consisting of resistors, capacitors, operational
amplifiers, and voltage references. Texas Instru-
ments has eliminated all of those components
with one easy-to-use 3-terminal device. That
device is the TLE2425 precision virtual ground.
Use of the TLE2425 over other typical circuit
solutions gives the designer increased dynamic
signal range, improved signal-to-noise ratio,
lower distortion, improved signal accuracy, and
easier interfacing to ADCs and DACs. These
benefits are the result of combining a precision
micropower voltage reference and a high-perfor-
mance precision operational amplifier in a single
silicon chip. It is the precision and performance of
these two circuit functions together that yield such
dramatic system-level performance.
100
VI = 5 V
80
60
TA = − 40°C
40
TA = 0°C
TA = − 55°C
20
0
TA = 25°C
− 20
TA = 125°C
TA = 25°C
− 40
− 60
TA = 125°C
− 80
TA = − 55°C
− 100
−10 −8 −6 −4 −2 0 2 4 6
IO − Output Current − mA
8 10
The TLE2425 improves input regulation as well as output regulation and, in addition, reduces output impedance
and power dissipation in a majority of virtual-ground-generation circuits. Both input regulation and load
regulation exceed 12 bits of accuracy on a single 5-V system. Signal-conditioning front ends of data acquisition
systems that push 12 bits and beyond can use the TLE2425 to eliminate a major source of system error.
AVAILABLE OPTIONS
TA
SMALL OUTLINE
(D)
PLASTIC
TO-226AA
(LP)
0°C to 70°C
TLE2425CD
TLE2425CD
−40°C to 85°C
TLE2425ID
TLE2425ID
−55°C to 125°C
TLE2425MD
—
† _{The D package is available taped and reeled. Add R suffix to}
the device type (e.g., TLE2425CDR).
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.
Copyright  2002, Texas Instruments Incorporated
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