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National Semiconductor Electronic Components Datasheet

LM4125 Datasheet

Precision Micropower Low Dropout Voltage Reference

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November 2003
LM4125
Precision Micropower Low Dropout Voltage Reference
General Description
The LM4125 is a precision low power low dropout bandgap
voltage reference with up to 5 mA output current source and
sink capability.
This series reference operates with input voltages as low as
2V and up to 6V consuming 160 µA (Typ.) supply current. In
power down mode, device current drops to less than 2 µA.
The LM4125 comes in two grades (A and Standard) and
three voltage options for greater flexibility. The best grade
devices (A) have an initial accuracy of 0.2%, while the stan-
dard have an initial accuracy of 0.5%, both with a tempco of
50ppm/˚C guaranteed from −40˚C to +125˚C.
The very low dropout voltage, low supply current and power-
down capability of the LM4125 makes this product an ideal
choice for battery powered and portable applications.
The device performance is guaranteed over the industrial
temperature range (−40˚C to +85˚C), while certain specs are
guaranteed over the extended temperature range (−40˚C to
+125˚C). Please contact National for full specifications over
the extended temperature range. The LM4125 is available in
a standard 5-pin SOT-23 package.
Features
n Small SOT23-5 package
n Low dropout voltage:
120 mV Typ @ 1 mA
n High output voltage accuracy:
0.2%
n Source and Sink current output:
±5 mA
n Supply current:
160 µA Typ.
n Low Temperature Coefficient:
50 ppm/˚C
n Fixed output voltages:
2.048, 2.5,and 4.096
n Industrial temperature Range:
−40˚C to +85˚C
n (For extended temperature range, −40˚C to 125˚C,
contact National Semiconductor)
Applications
n Portable, battery powered equipment
n Instrumentation and process control
n Automotive & Industrial
n Test equipment
n Data acquisition systems
n Precision regulators
n Battery chargers
n Base stations
n Communications
n Medical equipment
Connection Diagram
20069802
Refer to the Ordering Information Table in this Data Sheet for Specific Part Number
SOT23-5 Surface Mount Package
© 2003 National Semiconductor Corporation DS200698
www.national.com


National Semiconductor Electronic Components Datasheet

LM4125 Datasheet

Precision Micropower Low Dropout Voltage Reference

No Preview Available !

Ordering Information
Industrial Temperature Range (−40˚C to + 85˚C)
Initial Output Voltage Accuracy at 25˚C
And Temperature Coefficient
0.2%, 50 ppm/˚C max (A grade)
0.5%, 50 ppm/˚C max
LM4125 Supplied as
1000 Units, Tape and
Reel
LM4125AIM5-2.0
LM4125AIM5-2.5
LM4125AIM5-4.1
LM4125IM5-2.0
LM4125IM5-2.5
LM4125IM5-4.1
LM4125 Supplied as
3000 Units, Tape and
Reel
LM4125AIM5X-2.0
LM4125AIM5X-2.5
LM4125AIM5X-4.1
LM4125IM5X-2.0
LM4125IM5X-2.5
LM4125IM5X-4.1
Top
Marking
R80A
R81A
R82A
R80B
R81B
R82B
SOT-23 Package Marking Information
Only four fields of marking are possible on the SOT-23’s small surface. This
table gives the meaning of the four fields.
Field Information
First Field:
R = Reference
Second and third Field:
80 = 2.048V Voltage Option
81 = 2.500V Voltage Option
82 = 4.096V Voltage Option
Fourth Field:
A-B = Initial Reference Voltage Tolerance
A = ±0.2%
B = ±0.5%
www.national.com
2


Part Number LM4125
Description Precision Micropower Low Dropout Voltage Reference
Maker National Semiconductor
PDF Download

LM4125 Datasheet PDF





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