LM4121

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SNVS073C – APRIL 2000 – REVISED APRIL 2013

LM4121 Precision Micropower Low Dropout Voltage Reference

Check for Samples: LM4121

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FEATURES (LM4121-1.2)

DESCRIPTION

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•

Small SOT23-5 Package

The

LM4121

is

a

precision

bandgap

voltage

•

Low Voltage Operation

reference available in a fixed 1.25V and adjustable

•

High Output Voltage Accuracy: 0.2%

version with up to 5 mA current source and sink

capability.

•

Source and Sink Current Output: ±5 mA

•

Supply current: 160

μA Typ.

This series reference operates with input voltages as

low as 1.8V and up to 12V consuming 160 µA (Typ.)

•

Low Temperature Coefficient: 50 ppm/°C

supply current. In power down mode, device current

•

Enable Pin

drops to less than 2

μA.

•

Output Voltages: 1.25V and Adjustable

The LM4121 comes in two grades A and Standard.

•

Industrial Temperature Range:

−40°C to +85°C

The best grade devices (A) have an initial accuracy of

•

(For Extended Temperature Range,

−40°C to

0.2%, while the standard have an initial accuracy of

125°C, Contact Texas Instruments)

0.5%, both with a tempco of 50ppm/°C ensured from

−40°C to +125°C.

APPLICATIONS

The very low operating voltage, low supply current

and power-down capability of the LM4121 makes this

•

Portable, Battery Powered Equipment

product an ideal choice for battery powered and

•

Instrumentation and Process Control

portable applications.

•

Automotive & Industrial

The device performance is ensured over the industrial

•

Test Equipment

temperature range (

−40°C to +85°C), while certain

•

Data Acquisition Systems

specs are ensured over the extended temperature

range (

−40°C to +125°C). Please contact Texas

•

Precision Regulators

Instruments for full specifications over the extended

•

Battery Chargers

temperature range. The LM4121 is available in a

•

Base Stations

standard 5-pin SOT-23 package.

•

Communications

•

Medical Equipment

Block Diagram

* Resistors are removed on the LM4121-ADJ

†LM4121-ADJ only

Figure 1. LM4121-1.2 Block Diagram

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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PRODUCTION DATA information is current as of publication date.

Copyright © 2000–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.