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SLOS098D − AUGUST 1991 − REVISED MAY 1998
D
D
D
1/2 V Virtual Ground for Analog Systems
I
Self-Contained 3-terminal TO-226AA
Package
D
Excellent Output Regulation
− −45 µV Typ at I = 0 to −10 mA
O
− +15 µV Typ at I = 0 to +10 mA
O
D
D
Low-Impedance Output . . . 0.0075 Ω Typ
Noise Reduction Pin (D, JG, and P
Packages Only)
Micropower Operation . . . 170 µA Typ,
V = 5 V
I
D
Wide V Range . . . 4 V to 40 V
I
D
High Output-Current Capability
− Source . . . 20 mA Typ
− Sink . . . 20 mA Typ
INPUT/OUTPUT TRANSFER CHARACTERISTICS
10
V
I
V
I
V
O
V
I
description
V
+
8
6
4
O
2
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.”
V
O
The unique combination of a high-performance,
micropower operational amplifier and a precision-
trimmed divider on a single silicon chip results in
2
0
a precise V /V ratio of 0.5 while sinking and
O
I
sourcing current. The TLE2426 provides a low-
impedance output with 20 mA of sink and source
capability while drawing less than 280 µA
0
0.25
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 ), peak-to-peak noise is reduced while line ripple rejection is
NR
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.
AVAILABLE OPTIONS
PACKAGED DEVICES
CHIP
FORM
(Y)
SMALL
OUTLINE
(D)
CERAMIC
DIP
PLASTIC
DIP
PLASTIC
(LP)
T
A
(JG)
(P)
0°C to 70°C
TLE2426CD
—
TLE2426CLP
TLE2426CP
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.
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Copyright 1998, Texas Instruments Incorporated
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ꢟ ꢣ ꢠ ꢟꢘ ꢙꢭ ꢛꢚ ꢞ ꢦꢦ ꢤꢞ ꢜ ꢞ ꢝ ꢣ ꢟ ꢣ ꢜ ꢠ ꢨ
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