TEXAS INSTRUMENTS TLE2426, TLE2426Y Technical data

D

1/2 VI Virtual Ground for Analog Systems

D

Self-Contained 3-terminal TO-226AA
Package

D

Micropower Operation...170 µA Typ,
V

= 5 V

I

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.”

TLE2426, TLE2426Y

THE “RAIL SPLITTER”

PRECISION VIRTUAL GROUND

SLOS098D – AUGUST 1991 – REVISED MA Y 1998

D

Excellent Output Regulation
– –45 µV Typ at I
– +15 µV Typ at I

D

Low-Impedance Output...0.0075 Ω Typ

D

Noise Reduction Pin (D, JG, and P
Packages Only)

INPUT/OUTPUT TRANSFER CHARACTERISTICS

10

V

I

8

6

V

Voltage – V

4

O

= 0 to –10 mA

O

= 0 to +10 mA

O

V

I

V

O

VO+

V

I

2

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
sourcing current. The TLE2426 provides a low­impedance output with 20 mA of sink and source
capability while drawing less than 280 µA

ratio of 0.5 while sinking and

O/VI

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

), 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

SMALL

T

A

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.

OUTLINE

(D)

CERAMIC

DIP

(JG)

PLASTIC

(LP)

PLASTIC

DIP

(P)

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

1

TLE2426, TLE2426Y
THE “RAIL SPLITTER”
PRECISION VIRTUAL GROUND

SLOS098D – AUGUST 1991 – REVISED MA Y 1998

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.

D, JG, OR P PACKAGE

(TOP VIEW)

LP PACKAGE

(TOP VIEW)

OUT

COMMON

NC – No internal connection

IN

NC

1
2
3
4

NOISE REDUCTION

8

NC

7

NC

6

NC

5

IN
COMMON
OUT

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

(2) (2)

(1)

(1)

NOISE

REDUCTION

IN

(8)

(2)

COMMON

(3)

+1

(1)

CHIP THICKNESS:
15 MILS TYPICAL

BONDING PADS:
4 × 4 MILS MINIMUM

OUT

TJmax = 150°C
TOLERANCES ARE ±10%.
ALL DIMENSIONS ARE IN

MILS.

60

(3)

(3)

(8)

88

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

NOTE A: Both bonding pads numbered 1, both numbered 2,

and both numbered 3, must be bonded out to the
corresponding functions pin.

TLE2426, TLE2426Y

PACKAGE

UNIT

THE “RAIL SPLITTER”

PRECISION VIRTUAL GROUND

SLOS098D – AUGUST 1991 – REVISED MA Y 1998

absolute maximum ratings over operating free-air temperature (unless otherwise noted)

Continuous input voltage, V

40 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I

†

Continuous filter trap voltage 40 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output current, I

±80 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

O

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

: C suffix 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A

I suffix –40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

M suffix –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

stg

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. T emperature and/or supply voltages must be limited to ensure that the maximum dissipation

rating is not exceeded.

DISSIPATION RATING TABLE

TA ≤ 25°C DERATING FACTOR TA = 70°C TA = 85°C TA = 125°C

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

Input voltage, V
Operating free-air temperature, T

I

A

C SUFFIX I SUFFIX M SUFFIX
MIN MAX MIN MAX MIN MAX

4 40 4 40 4 40 V
0 70 –40 85 –55 125 °C

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3

TLE2426, TLE2426Y

PARAMETER

TEST CONDITIONS

T

†

UNIT

Output voltage

V

Temperature coefficient of output voltage

Full range

25

ppm/°C

Supply current

No load

A

‡

I

mA

(sourcing current)

‡

‡

I

0 to 10 mA

(sinking current)

‡

Short-circuit current

25°C

mA

Output noise voltage, rms

f

25°C

V

V

I

±10 mA

25°C

Output voltage current step response

s

V

01%,I

±10 mA

25°C

Step response

C

100 pF

25°C

s

THE “RAIL SPLITTER”
PRECISION VIRTUAL GROUND

SLOS098D – AUGUST 1991 – REVISED MA Y 1998

electrical characteristics at specified free-air temperature, VI = 5 V , IO = 0 (unless otherwise noted)

A

VI = 4 V 1.98 2 2.02

p

p

pp

Output voltage regulation

Output voltage regulation

Output impedance 25°C 7.5 22.5 mΩ
Noise-reduction impedance 25°C 110 kΩ

p

p

p

p

†

Full range is 0°C to 70°C.

‡

The listed values are not production tested.

p

p

p

VI = 5 V
VI = 40 V 19.8 20 20.2
VI = 5 V Full range 2.475 2.525

VI = 5 V 25°C 170 300
VI = 4 to 40 V Full range 400

= 0 to –10

O

IO = 0 to –20 mA 25°C –150 ±450

=

O

IO = 0 to 20 mA 25°C 65 ±235

Sinking current, VO = 5 V
Sourcing current, VO = 0

= 10 Hz to 10 kHz

to 0.1%,

O

to 0.

O

VI = 0 to 5 V, VO to 0.1%
VI = 0 to 5 V, VO to 0.01%

O

O

=

=

CNR = 0
CNR = 1 µF
CL = 0
CL = 100 pF
CL = 0
CL = 100 pF

p

=

L

25°C

25°C –45 ±160

Full range ±250

25°C 15 ±160

Full range ±250

°

°

°

°

°

TLE2426C

MIN TYP MAX

2.48 2.5 2.52

26

–47

120

30
290
275
400
390

20
160

pp

µ

µV

µV

µ

µ

µ

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TLE2426, TLE2426Y

PARAMETER

TEST CONDITIONS

T

†

UNIT

Output voltage

V

Temperature coefficient of output voltage

Full range

35

ppm/°C

Supply current

No load

A

‡

I

mA

(sourcing current)

‡

‡

I

0 to 10 mA

(sinking current)

‡

Short-circuit current

25°C

mA

Output noise voltage, rms

f

25°C

V

V

I

±10 mA

25°C

Output voltage current step response

s

V

01%,I

±10 mA

25°C

Step response

C

100 pF

25°C

s

THE “RAIL SPLITTER”

PRECISION VIRTUAL GROUND

SLOS098D – AUGUST 1991 – REVISED MA Y 1998

electrical characteristics at specified free-air temperature, VI = 12 V , IO = 0 (unless otherwise noted)

A

VI = 4 V 1.98 2 2.02

p

p

pp

Output voltage regulation

Output voltage regulation

Output impedance 25°C 7.5 22.5 mΩ
Noise-reduction impedance 25°C 110 kΩ

p

p

p

p

†

Full range is 0°C to 70°C.

‡

The listed values are not production tested.

p

p

p

VI = 12 V
VI = 40 V 19.8 20 20.2
VI = 12 V Full range 5.945 6.055

VI = 12 V 25°C 195 300
VI = 4 to 40 V Full range 400

= 0 to –10

O

IO = 0 to –20 mA 25°C –150 ±450

=

O

IO = 0 to 20 mA 25°C 65 ±235

Sinking current, VO = 12 V
Sourcing current, VO = 0

= 10 Hz to 10 kHz

to 0.1%,

O

to 0.

O

VI = 0 to 12 V, VO to 0.1%
VI = 0 to 12 V, VO to 0.01%

=

O

=

O

CNR = 0
CNR = 1 µF
CL = 0
CL = 100 pF
CL = 0
CL = 100 pF

p

=

L

25°C

25°C –45 ±160

Full range ±250

25°C 15 ±160

Full range ±250

°

°

°

°

°

TLE2426C

MIN TYP MAX

5.95 6 6.05

31

–70

120

30
290
275
400
390

20
120

pp

µ

µV

µV

µ

µ

µ

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

5

TLE2426, TLE2426Y

PARAMETER

TEST CONDITIONS

T

†

UNIT

Output voltage

V

Full range

25

ppm/°C

Supply current

No load

A

‡

I

mA

(sourcing current)

‡

‡

(sinking current)

‡

Short-circuit current

25°C

mA

Output noise voltage, rms

f

25°C

V

V

I

±10 mA

25°C

Output voltage current step response

s

V

01%,I

±10 mA

25°C

Step response

C

100 pF

25°C

s

THE “RAIL SPLITTER”
PRECISION VIRTUAL GROUND

SLOS098D – AUGUST 1991 – REVISED MA Y 1998

electrical characteristics at specified free-air temperature, VI = 5 V , IO = 0 (unless otherwise noted)

A

VI = 4 V 1.98 2 2.02

p

Temperature coefficient of output volt­age

pp

Output voltage regulation

Output voltage regulation

Output impedance 25°C 7.5 22.5 mΩ
Noise-reduction impedance 25°C 110 kΩ

p

p

p

p

†

Full range is –40°C to 85°C.

‡

The listed values are not production tested.

p

p

VI = 5 V
VI = 40 V 19.8 20 20.2
VI = 5 V Full range 2.47 2.53

VI = 5 V 25°C 170 300
VI = 4 to 40 V Full range 400

= 0 to –10

O

IO = 0 to –20 mA 25°C –150 ±450
IO = 0 to 10 mA 25°C 15 ±160
IO = 0 to 8 mA Full range ±250
IO = 0 to 20 mA 25°C 65 ±235

Sinking current, VO = 5 V
Sourcing current, VO = 0

= 10 Hz to 10 kHz

to 0.1%,

O

to 0.

O

VI = 0 to 5 V, VO to 0.1%
VI = 0 to 5 V, VO to 0.01%

=

O

=

O

CNR = 0
CNR = 1 µF
CL = 0
CL = 100 pF
CL = 0
CL = 100 pF

p

=

L

25°C

25°C –45 ±160

Full range ±250

°

°

°

°

°

TLE2426I

MIN TYP MAX

2.48 2.5 2.52

26

–47

120

30
290
275
400
390

20
160

pp

°

µ

µV

µV

µ

µ

µ

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TLE2426, TLE2426Y

PARAMETER

TEST CONDITIONS

T

†

UNIT

Output voltage

V

Temperature coefficient of output voltage

Full range

35

ppm/°C

Supply current

No load

A

‡

I

mA

(sourcing current)

‡

‡

(sinking current)

‡

Short-circuit current

25°C

mA

Output noise voltage, rms

f

25°C

V

V

I

±10 mA

25°C

Output voltage current step response

s

V

01%,I

±10 mA

25°C

Step response

C

100 pF

25°C

s

THE “RAIL SPLITTER”

PRECISION VIRTUAL GROUND

SLOS098D – AUGUST 1991 – REVISED MA Y 1998

electrical characteristics at specified free-air temperature, VI = 12 V , IO = 0 (unless otherwise noted)

A

VI = 4 V 1.98 2 2.02

p

p

pp

Output voltage regulation

Output voltage regulation

Output impedance 25°C 7.5 22.5 mΩ
Noise-reduction impedance 25°C 110 kΩ

p

p

p

p

†

Full range is –40°C to 85°C.

‡

The listed values are not production tested.

p

p

p

VI = 12 V
VI = 40 V 19.8 20 20.2
VI = 12 V Full range 5.935 6.065

VI = 12 V 25°C 195 300
VI = 4 to 40 V Full range 400

= 0 to –10

O

IO = 0 to –20 mA 25°C –150 ±450
IO = 0 to 10 mA 25°C 15 ±160
IO = 0 to 8 mA Full range ±250
IO = 0 to 20 mA 25°C 65 ±235

Sinking current, VO = 12 V
Sourcing current, VO = 0

= 10 Hz to 10 kHz

to 0.1%,

O

to 0.

O

VI = 0 to 12 V, VO to 0.1%
VI = 0 to 12 V, VO to 0.01%

O

=

O

=

CNR = 0
CNR = 1 µF
CL = 0
CL = 100 pF
CL = 0
CL = 100 pF

p

=

L

25°C

25°C –45 ±160

Full range ±250

°

°

°

°

°

TLE2426I

MIN TYP MAX

5.95 6 6.05

31

–70

120

30
290
275
400
390

20
120

pp

µ

µV

µV

µ

µ

µ

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

7