Negative Supply or Ground Connection. These pins must be
connected to ground.
Pulled to input for normal operation. Forcing this pin to ground will
turn-off the output.
This pin must be left open.
www.national.com
2
LM4140
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Maximum Voltage on any Input pin
Output Short-Circuit Duration
Power Dissipation (T
A
= 25˚C) (Note
2)
ESD Susceptibility (Note 3)
Human Body Model
Machine Model
−0.3V to 5.6V
Indefinite
345mW
2 kV
200V
Lead Temperature:
Soldering, (10 sec.)
+260˚C
Operating Range
(Note 1)
Storage Temperature Range
Ambient Temperature Range
Junction Temperature Range
−65˚C to +150˚C
0˚C to 70˚C
0˚C to 80˚C
LM4140
Electrical Charateristics
Unless otherwise specified, V
IN
= 3.0V for the LM4140-1.024 and LM4140-1.250, V
IN
= 5.0V for all other voltage options, V
EN
= V
IN
. C
OUT
= 1µF (Note 4), I
LOAD
= 1mA, T
A
= T
J
= 25˚C. Limits with standard typeface are for T
A
= 25˚C, and limits in
bold-
face type
apply over 0˚C to 70˚C temperature range.
Symbol
Parameter
Output Voltage Initial
Accuracy (Note 7)
LM4140B-1.024
LM4140B-1.250
LM4140B-2.048
LM4140B-2.500
LM4140B-4.096
LM4140C-1.024
LM4140C-1.250
LM4140C-2.048
LM4140C-2.500
LM4140C-4.096
TCV
REF
/˚C
Temperature Coefficient:
A Grade
B Grade
C Grade
Line Regulation
1.024V and 1.250V options
∆V
REF
/∆V
IN
All other voltage options
Load Regulation
All other voltage options
∆V
REF
/∆I
LOAD
4.096V Option
∆V
REF
∆V
REF
Long-Term Stability
Thermal Hysteresis (Note 8)
1000 Hrs
0˚C
≤
T
A
≤
+ 70˚C
5
60
20
V
ref
+ 200mV
≤
V
IN
≤
5.5V
1 mA
≤
I
LOAD
≤
8mA
1
20
150
35
150
ppm
ppm
ppm/mA
20
1.8V
≤
V
IN
≤
5.5V
50
300
350
200
250
ppm/V
0˚C
≤
T
A
≤
+ 70˚C
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
±
0.1
%
V
REF
±
0.1
3
6
10
ppm/˚C
3
www.national.com
LM4140
LM4140
Electrical Charateristics
(Continued)
Unless otherwise specified, V
IN
= 3.0V for the LM4140-1.024 and LM4140-1.250, V
IN
= 5.0V for all other voltage options, V
EN
= V
IN
. C
OUT
= 1µF (Note 4), I
LOAD
= 1mA, T
A
= T
J
= 25˚C. Limits with standard typeface are for T
A
= 25˚C, and limits in
bold-
face type
apply over 0˚C to 70˚C temperature range.
Symbol
Parameter
LM4140-1.024,
LM4140-1.250
Dropout Voltage (Note 9)
LM4140-2.048,
LM4140-2.500
V
IN
-V
REF
LM4140-4.096
Conditions
I
L
= 1 mA to 8 mA
I
L
= 1 mA
I
L
= 8 mA
I
L
= 1 mA
I
L
= 8 mA
Min
(Note 6)
1.8
20
160
20
195
2.2
Typ
(Note 5)
Max
(Note 6)
5.5
40
45
235
400
40
45
270
490
µV
PP
Units
V
Operating
Voltage
mV
V
N
I
S(ON)
Output Noise Voltage (Note
10)
Supply Current
All other voltage options
4.096V Option
0.1 Hz to 10 Hz
I
LOAD
= 0 mA
230
265
V
Enable
<
0.4V
0.8V
IN
2
.01
320
375
350
400
1
µA
V
nA
0.4
V
nA
35
40
mA
µA
I
S(OFF)
V
H
I
H
V
L
I
L
I
SC
Supply Current
Logic High Input Voltage
Logic High Input Current
Logic Low Input Voltage
Logic Low Input Current
Short Circuit Current
1
8.5
20
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see Electrical Characteristics. The
guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed
test conditions.
Note 2:
Without PCB copper enhancements. The maximum power dissipation must be de-rated at elevated temperatures and is limited by T
JMAX
(maximum
junction temperature),
θ
J-A
(junction to ambient thermal resistance) and T
A
(ambient temperature). The maximum power dissipation at any temperature is: PDiss
MAX
= (T
JMAX
− T
A
)/θ
J-A
up to the value listed in the Absolute Maximum Ratings. The
θ
J-A
for the SO-8 package is 160˚C/W.
Note 3:
The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin.
Note 4:
For proper operation, a 1µF capacitor is required between the output pin and the GND pin of the device. (See Application Section for details)
Note 5:
Typical numbers are at 25˚C and represent the most likely parametric norm.
Note 6:
Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 7:
High temperature and mechanical stress associated with PCB assembly can have significant impact on the initial accuracy of the LM4140 and may create
significant shifts in V
REF
. See Application Hints section regarding accuracy and PCB layout consideration.
Note 8:
Thermal hysteresis is defined as the changes in +25˚C output voltage before and after the cycling of the device from 0˚C to 70˚C.
Note 9:
Dropout voltage is defined as the minimum input to output differential voltage at which the output voltage drops by 0.5% below the value measured with
V
IN
= 3.0V for the LM4140-1.024 and LM4140-1.250, V
IN
= 5.0V for all other voltage options.
Note 10:
The output noise is based on 1.024V option. Output noise is linearly proportional to V
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