TLE2426IDRG4 Datasheet, PDF (1/30 Pages) Texas Instruments – THE RAIL SPLITTER PRECISION VIRTUAL GROUND

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TLE2426, TLE2426Y
THE RAIL SPLITTER"
PRECISION VIRTUAL GROUND
SLOS098D − AUGUST 1991 − REVISED MAY 1998
D 1/2 V_I Virtual Ground for Analog Systems
D Self-Contained 3-terminal TO-226AA
Package
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
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.”
D Excellent Output Regulation
− −45 µV Typ at I_O = 0 to −10 mA
− +15 µV Typ at I_O = 0 to + 10 mA
D Low-Impedance Output . . . 0.0075 Ω Typ
D Noise Reduction Pin (D, JG, and P
Packages Only)
INPUT/OUTPUT TRANSFER CHARACTERISTICS
10
VI
8
VI
VO
VO
+
VI
2
6
4
VO
The unique combination of a high-performance,
micropower operational amplifier and a precision-
2
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 low-
impedance output with 20 mA of sink and source
capability while drawing less than 280 µA
0
0
0.25
0.5
0.75
1
t − Time − s
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. The performance and precision of the TLE2426 is available in an easy-to-use, space saving,
3-terminal LP package. For increased performance, the optional 8-pin packages provide 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% with 3.6% 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.
TA
0°C to 70°C
AVAILABLE OPTIONS
PACKAGED DEVICES
SMALL
OUTLINE
(D)
CERAMIC
DIP
(JG)
PLASTIC
(LP)
TLE2426CD
—
TLE2426CLP
PLASTIC
DIP
(P)
TLE2426CP
CHIP
FORM
(Y)
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  1998, Texas Instruments Incorporated
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