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LM4121  Product Folder

Precision Micropower Low Dropout Voltage Reference
  

See Also:		   
LM4051 - lower current sunt reference
     LM4130 - Lower tempco & current, better accuracy
     LM4140 - ultra high precision reference
Generic P/N 4121
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing

Parametric Table Parametric Table
Temperature Min (deg C) -40 
Temperature Max (deg C) 85 
InputMin Voltage (Volt) - 
InputMax Voltage (Volt) 14 
Output Current (mA) 5 
Reference Voltage 1.25 V, Adjustable 
Initial Accuracy (+/-) Max (%) .20, .50 
Tempco, max (ppm/C) (ppm) 50 
Quiescent Current (mA) .16 
Dropout Voltage (Volt) .25, .28 

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LM4121 Precision Micropower Low Dropout Voltage Reference 436 Kbytes 6-Dec-01 View Online Download Receive via Email

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

Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LM4121AIM5-1.2SOT-235StatusFull productionN/AN/A24 Hour Samples
Buy Now		1K+$1.00reel
of
1000		R19A
ZXTT
13-15 weeks10000
LM4121AIM5-ADJSOT-235StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$1.00reel
of
1000		R20A
ZXTT
13-15 weeks10000
LM4121IM5-1.2SOT-235StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.85reel
of
1000		R19B
ZXTT
13-15 weeks10000
LM4121IM5-ADJSOT-235StatusFull productionN/AN/ASamples
Buy Now		1K+$0.85reel
of
1000		R20B
ZXTT
13-15 weeks10000
LM4121AIM5X-1.2SOT-235StatusFull productionN/AN/A 1K+$1.00reel
of
3000		R19A
ZXTT
13-15 weeks10000
LM4121AIM5X-ADJSOT-235StatusFull productionN/AN/A 1K+$1.00reel
of
3000		R20A
ZXTT
13-15 weeks10000
LM4121IM5X-1.2SOT-235StatusFull productionN/AN/A 1K+$0.85reel
of
3000		R19B
ZXTT
13-15 weeks10000
LM4121IM5X-ADJSOT-235StatusFull productionN/AN/A 
Buy Now 		1K+$0.85reel
of
3000		R20B
ZXTT
13-15 weeks10000
LM4121AI1.2 MDAUnpackaged DieFull productionN/AN/A   tray
of
N/A		-
N/A0
LM4121AIADJ MDAUnpackaged DieFull productionN/AN/A   tray
of
N/A		-
N/A0
LM4121AI1.2 MWAWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0
LM4121AIADJ MWAWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0

General Description

The LM4121 is a precision bandgap voltage reference available in a fixed 1.25V and adjustable version with up to 5 mA current source and sink capability.

This series reference operates with input voltages as low as 1.8V and up to 12V consuming 160 µA (Typ.) supply current. In power down mode, device current drops to less than 2 µA.

The LM4121 comes in two grades A and Standard. The best grade devices (A) have an initial accuracy of 0.2%, while the standard have an initial accuracy of 0.5%, both with a tempco of 50ppm/°C guaranteed from -40°C to +125°C.

The very low operating voltage, low supply current and power-down capability of the LM4121 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 LM4121 is available in a standard 5-pin SOT-23 package.

Features

Small SOT23-5 package

  

Low voltage operation

  

High output voltage accuracy:

0.2%

Source and Sink current output:

±5 mA

Supply current:

160 µA Typ.

Low Temperature Coefficient:

50 ppm/°C

Enable pin

  

Output voltages:

1.25V and Adjustable

Industrial temperature Range:

-40°C to +85°C

(For extended temperature range, -40°C to 125°C, contact National Semiconductor)

  

Applications

  • Portable, battery powered equipment
  • Instrumentation and process control
  • Automotive & Industrial
  • Test equipment
  • Data acquisition systems
  • Precision regulators
  • Battery chargers
  • Base stations
  • Communications
  • Medical equipment
[Information as of 15-Jan-2004]

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