LM4140 - Precision Micropower Low Dropout Voltage Reference from the PowerWise® Family
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
High initial accuracy: 0.1%
Ultra low noise
Low Temperature Coefficient: 3 ppm/°C (A grade)
Low voltage operation: 1.8V
SO-8 package
Low dropout voltage: 20 mV (typ) @ 1mA
Supply Current: 230 µA (typ), <= 1 µA disable mode
Enable pin
Output voltage options: 1.024V, 1.250V, 2.048V, 2.500V, and 4.096V
Custom voltages from 0.5V to 4.5V
Temperature range (0°C to 70°C)

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's first reference with output voltage 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 resolution 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/°C temperature coefficients. More...


Applications


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
click for larger image


ParametersValues
Initial Accuracy (+/-) Max 0.1 %
Reference Voltage 2.5 V, 1.25 V, 4.096 V, 2.048 V, 1.024 V
Tempco, max (ppm/C) 6, 3, 10 ppm
Input Min Voltage 1.8, 2.283, 2.735, 4.366 Volt
Input Max Voltage 5.5 Volt
Dropout Voltage 0.195, 0.16 Volt
Quiescent Current 0.23 mA
Output Current 8 mA
Voltage Noise (rms) 2.2 uV
Long Term Stability (ppm/1000hr) 60 ppm
Temperature Min 0 deg C
Temperature Max 70 deg C
PowerWise Yes


Typical Performance


click for larger image


  Also Recommended
LM4050Shunt Reference
LM4120Low Noise Reference
LM4132SOT-23 Precision Series Reference
Connection Diagram
click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM4140 High Precision Low Noise Low Dropout Voltage Reference 881
Kbytes
7-Apr-05 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LM4140ACM-1.0SOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
Samples
Buy Now
1K+$2.41rail
of
95
NSZXTT
4140A
CM1.0
12 weeks500
LM4140ACM-1.2SOIC NARROW8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$2.41rail
of
95
NSZXTT
4140A
CM1.2
6 weeks500
LM4140ACM-2.0SOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
 
Buy Now
1K+$2.41rail
of
95
NSZXTT
4140A
CM2.0
8 weeks500
LM4140ACM-2.5SOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
Samples
Buy Now
1K+$2.41rail
of
95
NSZXTT
4140A
CM2.5
6 weeks500
LM4140ACM-4.1SOIC NARROW8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$2.41rail
of
95
NSZXTT
4140A
CM4.1
6 weeks500
LM4140BCM-1.0SOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
Samples
Buy Now
1K+$2.06rail
of
95
NSZXTT
4140B
CM1.0
6 weeks500
LM4140BCM-1.2SOIC NARROW8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$2.06rail
of
95
NSZXTT
4140B
CM1.2
6 weeks500
LM4140BCM-2.0SOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
Samples
Buy Now
1K+$2.06rail
of
95
NSZXTT
4140B
CM2.0
6 weeks500
LM4140BCM-2.5SOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
Samples
Buy Now
1K+$2.06rail
of
95
NSZXTT
4140B
CM2.5
8 weeks500
LM4140BCM-4.1SOIC NARROW8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$2.06rail
of
95
NSZXTT
4140B
CM4.1
12 weeks500
LM4140CCM-1.0SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$1.91rail
of
95
NSZXTT
4140C
CM1.0
6 weeks500
LM4140CCM-1.2SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$1.91rail
of
95
NSZXTT
4140C
CM1.2
6 weeks1000
LM4140CCM-2.0SOIC NARROW8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.91rail
of
95
NSZXTT
4140C
CM2.0
6 weeks500
LM4140CCM-2.5SOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.91rail
of
95
NSZXTT
4140C
CM2.5
6 weeks500
LM4140CCM-4.1SOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.91rail
of
95
NSZXTT
4140C
CM4.1
6 weeks500
LM4140ACMX-2.5SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$2.41reel
of
2500
NSZXTT
4140A
CM2.5
12 weeksN/A
LM4140ACMX-4.1SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$2.41reel
of
2500
NSZXTT
4140A
CM4.1
12 weeksN/A
LM4140BCMX-1.0SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$2.06reel
of
2500
NSZXTT
4140B
CM1.0
6 weeks5000
LM4140BCMX-2.5SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$2.06reel
of
2500
NSZXTT
4140B
CM2.5
12 weeks3000
LM4140BCMX-4.1SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$2.06reel
of
2500
NSZXTT
4140B
CM4.1
12 weeksN/A
LM4140CCMX-1.0SOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
 
Buy Now
1K+$1.91reel
of
2500
NSZXTT
4140C
CM1.0
8 weeks3000
LM4140CCMX-1.2SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$1.91reel
of
2500
NSZXTT
4140C
CM1.2
12 weeks5000
LM4140CCMX-2.5SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$1.91reel
of
2500
NSZXTT
4140C
CM2.5
6 weeks3000
LM4140CCMX-4.1SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$1.91reel
of
2500
NSZXTT
4140C
CM4.1
12 weeks3000

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM4140CCMX-2.0
NONE
NATIONAL SEMICONDUCTOR
16 Nov 2008

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's first reference with output voltage 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 resolution 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/°C temperature coefficients. For even lower Tempco, contact National Semiconductor.

The device performance is specified over the temperature range (0°C to +70°C) and is available in compact 8-pin SO package.

For other output voltage options from 0.5V to 4.5V, contact National Semiconductor.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM4140ACM-1.0LFAST10195100026050002739175862
LM4140ACM-1.2LFAST10195100026050002739175862
LM4140ACM-2.0LFAST10195100026050002739175862
LM4140ACM-2.5LFAST10195100026050002739175862
LM4140ACM-4.1LFAST10195100026050002739175862
LM4140ACMX-2.5LFAST10195100026050002739175862
LM4140ACMX-4.1LFAST10195100026050002739175862
LM4140BCM-1.0LFAST10195100026050002739175862
LM4140BCM-1.2LFAST10195100026050002739175862
LM4140BCM-2.0LFAST10195100026050002739175862
LM4140BCM-2.5LFAST10195100026050002739175862
LM4140BCM-4.1LFAST10195100026050002739175862
LM4140BCMX-1.0LFAST10195100026050002739175862
LM4140BCMX-2.5LFAST10195100026050002739175862
LM4140BCMX-4.1LFAST10195100026050002739175862
LM4140CCM-1.0LFAST10195100026050002739175862
LM4140CCM-1.2LFAST10195100026050002739175862
LM4140CCM-2.0LFAST10195100026050002739175862
LM4140CCM-2.5LFAST10195100026050002739175862
LM4140CCM-4.1LFAST10195100026050002739175862
LM4140CCMX-1.0LFAST10195100026050002739175862
LM4140CCMX-1.2LFAST10195100026050002739175862
LM4140CCMX-2.5LFAST10195100026050002739175862
LM4140CCMX-4.1LFAST10195100026050002739175862

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1357: Application Note 1357 LM2744 Evaluation Board 1794
Kbytes
5-Oct-05 Download
AN-1357 (Chinese): Application Note 1357 LM2744 Evaluation Board
388 Kbytes  
AN-1559: Application Note 1559 Practical RTD Interface Solutions 215
Kbytes
10-Oct-07 Download
AN-1559 (Japanese): Application Note 1559 Practical RTD Interface Solutions
251 Kbytes   Download
AN-1559 (Chinese): Application Note 1559 Practical RTD Interface Solutions
805 Kbytes  

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 4-Nov-2009]