Precision Virtual Ground
ąą
TLE2426, TLE2426Y THE RAIL SPLITTER" PRECISION VIRTUAL GROUND
SLOS098D − AUGUST 1991 − REVISED MAY 1998
D 1/2 VI V...
Description
ąą
TLE2426, TLE2426Y THE RAIL SPLITTER" PRECISION VIRTUAL GROUND
SLOS098D − AUGUST 1991 − REVISED MAY 1998
D 1/2 VI Virtual Ground for Analog Systems D Self-Contained 3-terminal TO-226AA
Package
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
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.”
Voltage − V
D Excellent Output Regulation
− −45 µV Typ at IO = 0 to −10 mA − +15 µV Typ at IO = 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 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
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 con...
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