TLE2425
PRECISION VIRTUAL GROUND
SLOS065D MARCH 1991 REVISED APRIL 2002
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
D
2.5-V Virtual Ground for 5-V/GND Analog
Systems
D
High Output-Current Capability
Sink or Source . . . 20 mA Typ
D
Micropower Operation . . . 170
A Typ
D
Excellent Regulation Characteristics
Output Regulation
45
V Typ at I
O
= 0 to 10 mA
+15
V Typ at I
O
= 0 to + 10 mA
Input Regulation = 1.5
V/V Typ
D
Low-Impedance Output . . . 0.0075
Typ
D
Macromodel Included
description
In signal-conditioning applications using a single
power source, a reference voltage is required for
termination of all signal grounds. To accomplish
this, engineers have typically used solutions
consisting of resistors, capacitors, operational
amplifiers, and voltage references. Texas Instru-
ments has eliminated all of those components
with one easy-to-use 3-terminal device. That
device is the TLE2425 precision virtual ground.
Use of the TLE2425 over other typical circuit
solutions gives the designer increased dynamic
signal range, improved signal-to-noise ratio,
lower distortion, improved signal accuracy, and
easier interfacing to ADCs and DACs. These
benefits are the result of combining a precision
micropower voltage reference and a high-perfor-
mance precision operational amplifier in a single
silicon chip. It is the precision and performance of
these two circuit functions together that yield such
dramatic system-level performance.
The TLE2425 improves input regulation as well as output regulation and, in addition, reduces output impedance
and power dissipation in a majority of virtual-ground-generation circuits. Both input regulation and load
regulation exceed 12 bits of accuracy on a single 5-V system. Signal-conditioning front ends of data acquisition
systems that push 12 bits and beyond can use the TLE2425 to eliminate a major source of system error.
AVAILABLE OPTIONS
TA
SMALL OUTLINE
(D)
PLASTIC
TO-226AA
(LP)
0
C to 70
C
TLE2425CD
TLE2425CD
40
C to 85
C
TLE2425ID
TLE2425ID
55
C to 125
C
TLE2425MD
--
The D package is available taped and reeled. Add R suffix to
the device type (e.g., TLE2425CDR).
Copyright
2002, Texas Instruments Incorporated
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.
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.
V) Output V
oltage
Change
V
80
20
0
20
60
40
40
60
80
100
10
8
2
0
2
6
4
4
6
8
10
100
OUTPUT REGULATION
IO Output Current mA
VI = 5 V
TA = 55
C
TA = 25
C
TA = 125
C
V
O
TA = 40
C
TA = 125
C
TA = 55
C
TA = 0
C
TA = 25
C
TLE2425
PRECISION VIRTUAL GROUND
SLOS065D MARCH 1991 REVISED APRIL 2002
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
1
2
3
4
8
7
6
5
OUT
COMMON
IN
NC
NC
NC
NC
NC
D, OR JG PACKAGE
(TOP VIEW)
NC No internal connection
OUT
IN
COMMON
LP PACKAGE
(TOP VIEW)
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Continuous input voltage, V
I
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 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
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
TLE2425
PRECISION VIRTUAL GROUND
SLOS065D MARCH 1991 REVISED APRIL 2002
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
electrical characteristics at specified free-air temperature, V
I
= 5 V, I
O
= 0 (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TA
TLE2425C
UNIT
PARAMETER
TEST CONDITIONS
TA
MIN
TYP
MAX
UNIT
Output voltage
25
C
2.48
2.5
2.52
V
Output voltage
Full range
2.47
2.53
V
Temperature coefficient of output voltage
25
C
20
ppm/
C
Bias current
IO = 0
25
C
170
250
A
Bias current
IO = 0
Full range
250
A
VI = 4 5 V to 5 5 V
25
C
1.5
20
V
Input voltage regulation
VI = 4.5 V to 5.5 V
Full range
25
V
Input voltage regulation
VI = 4 V to 40 V
25
C
1.5
20
V/V
VI = 4 V to 40 V
Full range
25
V/V
Ripple rejection
f = 120 Hz,
VI(PP) = 1 V
25
C
80
dB
IO = 0 to 10 mA
25
C
160
45
160
Output voltage regulation (source current)
IO = 0 to 10 mA
Full range
250
250
V
g
g
(
)
IO = 0 to 20 mA
25
C
450
150
450
IO = 0 to 10 mA
25
C
160
15
160
Output voltage regulation (sink current)
IO = 0 to 10 mA
Full range
250
250
V
g
g
(
)
IO = 0 to 20 mA
25
C
235
65
235
Long-term drift of output voltage
t
=
1000 h,
Noncumulative
25
C
15
ppm
Output impedance
25
C
7.5
22.5
m
Short-circuit output current (sink current)
VO = 5 V
25
C
30
55
mA
Short-circuit output current (source current)
VO = 0
25
C
30
50
mA
Output noise voltage, rms
f = 10 Hz to 10 kHz
25
C
100
V
VO to 0.1%,
CL = 0
110
Output voltage response to output current step
O
,
IO =
10 mA
CL = 100 pF
25
C
115
s
Output voltage response to output current step
VO to 0.01%,
CL = 0
25
C
180
s
O
,
IO =
10 mA
CL = 100 pF
180
Output voltage response to input voltage step
VI = 4.5 to 5.5 V,
VO to 0.1%
25
C
12
s
Output voltage response to input voltage step
VI = 4.5 to 5.5 V,
VO to 0.01%
25
C
30
s
Output voltage turn on response
VI = 0 to 5 V,
VO to 0.1%
25
C
125
s
Output voltage turn-on response
VI = 0 to 5 V,
VO to 0.01%
25
C
210
s
Full range is 0
C to 70
C.
The listed values are not production tested.
TLE2425
PRECISION VIRTUAL GROUND
SLOS065D MARCH 1991 REVISED APRIL 2002
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
electrical characteristics at specified free-air temperature, V
I
= 5 V, I
O
= 0 (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TA
TLE2425I
UNIT
PARAMETER
TEST CONDITIONS
TA
MIN
TYP
MAX
UNIT
Output voltage
25
C
2.48
2.5
2.52
V
Output voltage
Full range
2.47
2.53
V
Temperature coefficient of output voltage
25
C
20
ppm/
C
Bias current
IO = 0
25
C
170
250
A
Bias current
IO = 0
Full range
250
A
VI = 4 5 V to 5 5 V
25
C
1.5
20
V
Input voltage regulation
VI = 4.5 V to 5.5 V
Full range
75
V
Input voltage regulation
VI = 4 V to 40 V
25
C
1.5
20
V/V
VI = 4 V to 40 V
Full range
75
V/V
Ripple rejection
f = 120 Hz,
VI(PP) = 1 V
25
C
80
dB
IO = 0 to 10 mA
25
C
160
45
160
Output voltage regulation (source current)
IO = 0 to 10 mA
Full range
250
250
V
g
g
(
)
IO = 0 to 20 mA
25
C
450
150
450
IO = 0 to 8 mA
25
C
160
15
160
Output voltage regulation (sink current)
IO = 0 to 8 mA
Full range
250
250
V
g
g
(
)
IO = 0 to 20 mA
25
C
235
65
235
Long-term drift of output voltage
t
=
1000 h,
Noncumulative
25
C
15
ppm
Output impedance
25
C
7.5
22.5
m
Short-circuit output current (sink current)
VO = 5 V
25
C
30
55
mA
Short-circuit output current (source current)
VO = 0
25
C
30
50
mA
Output noise voltage, rms
f = 10 Hz to 10 kHz
25
C
100
V
VO to 0.1%,
CL = 0
110
Output voltage response to output current step
O
,
IO =
10 mA
CL = 100 pF
25
C
115
s
Output voltage response to output current step
VO to 0.01%,
CL = 0
25
C
180
s
O
,
IO =
10 mA
CL = 100 pF
180
Output voltage response to input voltage step
VI = 4.5 to 5.5 V,
VO to 0.1%
25
C
12
s
Output voltage response to input voltage step
VI = 4.5 to 5.5 V,
VO to 0.01%
25
C
30
s
Output voltage turn on response
VI = 0 to 5 V,
VO to 0.1%
25
C
125
s
Output voltage turn-on response
VI = 0 to 5 V,
VO to 0.01%
25
C
210
s
Full range is 40
C to 85
C.
The listed values are not production tested.
TLE2425
PRECISION VIRTUAL GROUND
SLOS065D MARCH 1991 REVISED APRIL 2002
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
electrical characteristics at specified free-air temperature, V
I
= 5 V, I
O
= 0 (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TA
TLE2425M
UNIT
PARAMETER
TEST CONDITIONS
TA
MIN
TYP
MAX
UNIT
Output voltage
25
C
2.48
2.5
2.52
V
Output voltage
Full range
2.47
2.53
V
Temperature coefficient of output voltage
25
C
20
ppm/
C
Bias current
IO = 0
25
C
170
250
A
Bias current
IO = 0
Full range
250
A
VI = 4 5 V to 5 5 V
25
C
1.5
20
V
Input voltage regulation
VI = 4.5 V to 5.5 V
Full range
100
V
Input voltage regulation
VI = 4 5 V to 40 V
25
C
1.5
20
V/V
VI = 4.5 V to 40 V
Full range
100
V/V
Ripple rejection
f = 120 Hz,
VI(PP) = 1 V
25
C
80
dB
IO = 0 to 10 mA
25
C
160
45
160
Output voltage regulation (source current)
IO = 0 to 10 mA
Full range
250
250
V
g
g
(
)
IO = 0 to 20 mA
25
C
450
150
450
IO = 0 to 3 mA
25
C
160
15
160
Output voltage regulation (sink current)
IO = 0 to 3 mA
Full range
250
250
V
g
g
(
)
IO = 0 to 20 mA
25
C
235
65
235
Long-term drift of output voltage
t
=
1000 h,
Noncumulative
25
C
15
ppm
Output impedance
25
C
7.5
22.5
m
Short-circuit output current (sink current)
VO = 5 V
25
C
30
55
mA
Short-circuit output current (source current)
VO = 0
25
C
30
50
mA
Output noise voltage, rms
f = 10 Hz to 10 kHz
25
C
100
V
VO to 0.1%,
CL = 0
110
Output voltage response to output current step
O
,
IO =
10 mA
CL = 100 pF
25
C
115
s
Output voltage response to output current step
VO to 0.01%,
CL = 0
25
C
180
s
O
,
IO =
10 mA
CL = 100 pF
180
Output voltage response to input voltage step
VI = 4.5 to 5.5 V,
VO to 0.1%
25
C
12
s
Output voltage response to input voltage step
VI = 4.5 to 5.5 V,
VO to 0.01%
25
C
30
s
Output voltage turn on response
VI = 0 to 5 V,
VO to 0.1%
25
C
125
s
Output voltage turn-on response
VI = 0 to 5 V,
VO to 0.01%
25
C
210
s
Full range is 55
C to 125
C.
The listed values are not production tested.
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