TLE2426, TLE2426Y
THE "RAIL SPLITTER"
PRECISION VIRTUAL GROUND
SLOS098D AUGUST 1991 REVISED MAY 1998
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
1/2 V
I
Virtual Ground for Analog Systems
D
Self-Contained 3-terminal TO-226AA
Package
D
Micropower Operation . . . 170
A 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
45
V Typ at I
O
= 0 to 10 mA
+15
V Typ at I
O
= 0 to + 10 mA
D
Low-Impedance Output . . . 0.0075
Typ
D
Noise Reduction Pin (D, JG, and P
Packages Only)
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."
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 low-
impedance output with 20 mA of sink and source
capability while drawing less than 280
A
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.
AVAILABLE OPTIONS
PACKAGED DEVICES
CHIP
TA
SMALL
OUTLINE
(D)
CERAMIC
DIP
(JG)
PLASTIC
(LP)
PLASTIC
DIP
(P)
CHIP
FORM
(Y)
0
C to 70
C
TLE2426CD
--
TLE2426CLP
TLE2426CP
40
C to 85
C
TLE2426ID
--
TLE2426ILP
TLE2426IP
TLE2426Y
55
C to 125
C
TLE2426MD
TLE2426MJG
TLE2426MLP
TLE2426MP
The D and LP packages are available taped and reeled in the commercial temperature range only. Add R suffix
to the device type (e. g., TLC2426CDR). Chips are tested at 25
C.
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
1998, Texas Instruments Incorporated
VO
VI
4
2
0
8
6
0
0.25
0.5
0.75
1
V
oltage V
t Time s
INPUT/OUTPUT TRANSFER CHARACTERISTICS
10
V
O
+
V
I
2
VI
VO
TLE2426, TLE2426Y
THE "RAIL SPLITTER"
PRECISION VIRTUAL GROUND
SLOS098D AUGUST 1991 REVISED MAY 1998
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description (continued)
The C-suffix devices are characterized for operation from 0
C to 70
C. The I suffix devices are characterized
for operation from 40
C to 85
C. The M suffix devices are characterized over the full military temperature range
of 55
C to 125
C.
OUT
IN
COMMON
1
2
3
4
8
7
6
5
OUT
COMMON
IN
NC
NOISE REDUCTION
NC
NC
NC
D, JG, OR P PACKAGE
(TOP VIEW)
NC No internal connection
LP PACKAGE
(TOP VIEW)
TLE2426Y chip information
This chip, properly assembled, displays characteristics similar to the TLE2426C. Thermal compression or
ultrasonic bonding may be used on the doped aluminum bonding pads. The chips may be mounted with
conductive epoxy or a gold-silicon preform.
BONDING PAD ASSIGNMENTS
CHIP THICKNESS:
15 MILS TYPICAL
BONDING PADS:
4
4 MILS MINIMUM
TJmax = 150
C
TOLERANCES ARE
10%.
ALL DIMENSIONS ARE IN
MILS.
60
88
OUT
(1)
(2)
(8)
(3)
NOISE
REDUCTION
IN
COMMON
+ 1
NOTE A: Both bonding pads numbered 1, both numbered 2,
and both numbered 3, must be bonded out to the
corresponding functions pin.
(3) (3)
(2)
(2)
(1)
(1)
(8)
TLE2426, TLE2426Y
THE "RAIL SPLITTER"
PRECISION VIRTUAL GROUND
SLOS098D AUGUST 1991 REVISED MAY 1998
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
Continuous input voltage, V
I
40 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous filter trap voltage
40 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output current, I
O
80 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Duration of short-circuit current at (or below) 25
C (see Note 1)
unlimited
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation
See Dissipation Rating Table
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: C suffix
0
C to 70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I suffix
40
C to 85
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M suffix
55
C to 125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or P package
260
C
. . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: JG or LP package
300
C
. . . . . . . . . . . . . .
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The output may be shorted to either supply. Temperature and/or supply voltages must be limited to ensure that the maximum dissipation
rating is not exceeded.
DISSIPATION RATING TABLE
PACKAGE
TA
25
C
DERATING FACTOR
TA = 70
C
TA = 85
C
TA = 125
C
PACKAGE
POWER RATING
ABOVE TA = 25
C
POWER RATING
POWER RATING
POWER RATING
D
725 mV
5.8 mW/
C
464 mW
377 mW
145 mW
JG
1050 mV
8.4 mW/
C
672 mW
546 mW
210 mW
LP
775 mV
6.2 mW/
C
496 mW
403 mW
155 mW
P
1000 mV
8.0 mW/
C
640 mW
520 mW
200 mW
recommended operating conditions
C SUFFIX
I SUFFIX
M SUFFIX
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
Input voltage, VI
4
40
4
40
4
40
V
Operating free-air temperature, TA
0
70
40
85
55
125
C
TLE2426, TLE2426Y
THE "RAIL SPLITTER"
PRECISION VIRTUAL GROUND
SLOS098D AUGUST 1991 REVISED MAY 1998
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics at specified free-air temperature, V
I
= 5 V, I
O
= 0 (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TA
TLE2426C
UNIT
PARAMETER
TEST CONDITIONS
TA
MIN
TYP
MAX
UNIT
VI = 4 V
1.98
2
2.02
Output voltage
VI = 5 V
25
C
2.48
2.5
2.52
V
Output voltage
VI = 40 V
19.8
20
20.2
V
VI = 5 V
Full range
2.475
2.525
Temperature coefficient of output voltage
Full range
25
ppm/
C
Temperature coefficient of output voltage
Full range
25
ppm/
C
Supply current
No load
VI = 5 V
25
C
170
300
A
Supply current
No load
VI = 4 to 40 V
Full range
400
A
O t
t
lt
l ti
IO = 0 to 10 mA
25
C
45
160
Output voltage regulation
(sourcing current)
IO = 0 to 10 mA
Full range
250
V
(sourcing current)
IO = 0 to 20 mA
25
C
150
450
O t
t
lt
l ti
IO = 0 to 10 mA
25
C
15
160
Output voltage regulation
(sinking current)
IO = 0 to 10 mA
Full range
250
V
(sinking current)
IO = 0 to 20 mA
25
C
65
235
Output impedance
25
C
7.5
22.5
m
Noise-reduction impedance
25
C
110
k
Short circuit current
Sinking current,
VO = 5 V
25
C
26
mA
Short-circuit current
Sourcing current,
VO = 0
25
C
47
mA
Output noise voltage rms
f = 10 Hz to 10 kHz
CNR = 0
25
C
120
V
Output noise voltage, rms
f = 10 Hz to 10 kHz
CNR = 1
F
25
C
30
V
VO to 0 1%
IO =
10 mA
CL = 0
25
C
290
Output voltage current step response
VO to 0.1%, IO =
10 mA
CL = 100 pF
25
C
275
s
Output voltage current step response
VO to 0 01% IO =
10 mA
CL = 0
25
C
400
s
VO to 0.01%, IO =
10 mA
CL = 100 pF
25
C
390
Step response
VI = 0 to 5 V, VO to 0.1%
CL = 100 pF
25
C
20
s
Step response
VI = 0 to 5 V, VO to 0.01%
CL = 100 pF
25
C
160
s
Full range is 0
C to 70
C.
The listed values are not production tested.
TLE2426, TLE2426Y
THE "RAIL SPLITTER"
PRECISION VIRTUAL GROUND
SLOS098D AUGUST 1991 REVISED MAY 1998
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics at specified free-air temperature, V
I
= 12 V, I
O
= 0 (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TA
TLE2426C
UNIT
PARAMETER
TEST CONDITIONS
TA
MIN
TYP
MAX
UNIT
VI = 4 V
1.98
2
2.02
Output voltage
VI = 12 V
25
C
5.95
6
6.05
V
Output voltage
VI = 40 V
19.8
20
20.2
V
VI = 12 V
Full range
5.945
6.055
Temperature coefficient of output voltage
Full range
35
ppm/
C
Temperature coefficient of output voltage
Full range
35
ppm/
C
Supply current
No load
VI = 12 V
25
C
195
300
A
Supply current
No load
VI = 4 to 40 V
Full range
400
A
O t
t
lt
l ti
IO = 0 to 10 mA
25
C
45
160
Output voltage regulation
(sourcing current)
IO = 0 to 10 mA
Full range
250
V
(sourcing current)
IO = 0 to 20 mA
25
C
150
450
O t
t
lt
l ti
IO = 0 to 10 mA
25
C
15
160
Output voltage regulation
(sinking current)
IO = 0 to 10 mA
Full range
250
V
(sinking current)
IO = 0 to 20 mA
25
C
65
235
Output impedance
25
C
7.5
22.5
m
Noise-reduction impedance
25
C
110
k
Short circuit current
Sinking current,
VO = 12 V
25
C
31
mA
Short-circuit current
Sourcing current,
VO = 0
25
C
70
mA
Output noise voltage rms
f = 10 Hz to 10 kHz
CNR = 0
25
C
120
V
Output noise voltage, rms
f = 10 Hz to 10 kHz
CNR = 1
F
25
C
30
V
VO to 0 1%
IO =
10 mA
CL = 0
25
C
290
Output voltage current step response
VO to 0.1%,
IO =
10 mA
CL = 100 pF
25
C
275
s
Output voltage current step response
VO to 0 01% IO =
10 mA
CL = 0
25
C
400
s
VO to 0.01%, IO =
10 mA
CL = 100 pF
25
C
390
Step response
VI = 0 to 12 V, VO to 0.1%
CL = 100 pF
25
C
20
s
Step response
VI = 0 to 12 V, VO to 0.01%
CL = 100 pF
25
C
120
s
Full range is 0
C to 70
C.
The listed values are not production tested.
PDF 
ZIP