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參數(shù)資料
| 型號： | LM4140CCMX-4.1 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | High Precision Low Noise Low Dropout Voltage |
| 中文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 4.096 V, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 4/15頁 |
| 文件大?。?/td> | 439K |
| 代理商： | LM4140CCMX-4.1 |
LM4140
Electrical Charateristics
(Continued)
Unless otherwise specified, V
IN
= 3.0V for the LM4140-1.024 and LM4140-1.250, V
= 5.0V for all other voltage options, V
EN
= V
. C
= 1μF (Note 4), I
= 1mA, T
= T
= 25C. Limits with standard typeface are for T
A
= 25C, and limits in
boldface type
apply over 0C to 70C temperature range.
Symbol
Parameter
Conditions
Min
(Note 6)
1.8
Typ
(Note 5)
Max
(Note 6)
5.5
Units
Operating
Voltage
LM4140-1.024,
LM4140-1.250
Dropout Voltage (Note 9)
LM4140-2.048,
LM4140-2.500
I
L
= 1 mA to 8 mA
V
V
IN
-V
REF
I
L
= 1 mA
20
40
45
235
400
40
45
270
490
mV
I
L
= 8 mA
160
LM4140-4.096
I
L
= 1 mA
20
I
L
= 8 mA
195
V
N
Output Noise Voltage
(Note 10)
Supply Current
All other voltage options
0.1 Hz to 10 Hz
2.2
μV
PP
I
S(ON)
I
LOAD
= 0 mA
μA
230
320
375
350
400
1
4.096V Option
265
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
V
Enable
<
0.4V
.01
μA
V
nA
V
nA
mA
0.8V
IN
2
0.4
1
8.5
20
35
40
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see Electrical Characteristics. The guar-
anteed 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 160C/W.
Note 3:
The human body model is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin. The machine model is a 200 pF capacitor discharged di-
rectly 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 25C and represent the most likely parametric norm.
Note 6:
Limits are 100% production tested at 25C. 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 +25C output voltage before and after the cycling of the device from 0C to 70C.
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
REF
.
L
www.national.com
4
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