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LM4140CCMX-2.0 Datasheet

  • LM4140CCMX-2.0

  • High Precision Low Noise Low Dropout Voltage

  • 15頁(yè)

  • NSC

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LM4140 High Precision Low Noise Low Dropout Voltage Reference
July 2000
LM4140
High Precision Low Noise Low Dropout Voltage
Reference
General Description
The LM4140 series of precision references are designed to
combine high accuracy, low drift and noise with low power
dissipation in a small package.
The LM4140 is the industry鈥檚 first reference with output volt-
age options lower than the bandgap voltage.
The key to the advance performance of the LM4140 is the
use of EEPROM registers and CMOS DACs for temperature
coefficient curvature correction and trimming of the output
voltage accuracy of the device during the final production
testing.
The major advantage of this method is the much higher reso-
lution available with DACs than is available economically
with most methods utilized by other bandgap references.
The low input and dropout voltage, low supply current and
output drive capability of the LM4140 makes this product an
ideal choice for battery powered and portable applications.
The LM4140 is available in three grades (A, B, C) with 0.1%
initial accuracy and 3, 6 and 10 ppm/藲C temperature coeffi-
cients. For even lower Tempco, contact National Semicon-
ductor.
The device performance is specified over the temperature
range (0藲C to +70藲C) and is available in compact 8-pin SO
package.
For other output voltage options from 0.5V to 4.5V, con-
tact National Semiconductor.
Features
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High initial accuracy: 0.1%
Ultra low noise
Low Temperature Coefficient: 3 ppm/藲C (A grade)
Low voltage operation: 1.8V
SO-8 package
Low dropout voltage: 20 mV (typ)
@
1mA
Supply Current: 230 碌A(chǔ) (typ),
鈮?/div>
1 碌A(chǔ) disable mode
Enable pin
Output voltage options: 1.024V, 1.250V, 2.048V, 2.500V,
and 4.096V
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Custom voltages from 0.5V to 4.5V
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Temperature range (0藲C to 70藲C)
Applications Summary
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Portable, battery powered equipment
Instrumentation and test equipment
Automotive
Industrial process control
Data acquisition systems
Medical equipment
Precision scales
Servo systems
Battery charging
Typical Application
Typical Temperature Coefficient
(Sample of 5 Parts)
DS101079-1
C
OUT
, Output bypass capacitor. See text for selection detail.
DS101079-23
Refer to the Ordering Information Table in this Data Sheet for Specific Part
Number
漏 2000 National Semiconductor Corporation
DS101079
www.national.com

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