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LM4121 Datasheet Preview

LM4121 Datasheet

Precision Micropower Low Dropout Voltage Reference

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LM4121
www.ti.com
SNVS073C – APRIL 2000 – REVISED APRIL 2013
LM4121 Precision Micropower Low Dropout Voltage Reference
Check for Samples: LM4121
FEATURES (LM4121-1.2)
1
2 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 Texas Instruments)
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
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 ensured 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 ensured over the industrial
temperature range (40°C to +85°C), while certain
specs are ensured over the extended temperature
range (40°C to +125°C). Please contact Texas
Instruments for full specifications over the extended
temperature range. The LM4121 is available in a
standard 5-pin SOT-23 package.
Block Diagram
* Resistors are removed on the LM4121-ADJ
†LM4121-ADJ only
Figure 1. LM4121-1.2 Block Diagram
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2000–2013, Texas Instruments Incorporated




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LM4121 Datasheet Preview

LM4121 Datasheet

Precision Micropower Low Dropout Voltage Reference

No Preview Available !

LM4121
SNVS073C – APRIL 2000 – REVISED APRIL 2013
Connection Diagrams
www.ti.com
Figure 2. SOT23-5 Surface Mount Package
Figure 3. SOT23-5 Surface Mount Package
Table 1. SOT-23 Package Marking Information(1)
First Field:
R = Reference
Second and third Field:
19 = 1.250V Voltage Option
20 = Adjustable
Fourth Field:
A-B = Initial Reference Voltage Tolerance
A = ±0.2%
B = ±0.5%
Field Information
(1) Only four fields of marking are possible on the SOT-23's small surface. This table gives the meaning of the four fields.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings (1)(2)
Maximum Voltage on input or enable pins
Output Short-Circuit Duration
Power Dissipation (TA = 25°C) (3):
DBV0005B package − θJA
Power Dissipation
ESD Susceptibility (4)
Human Body Model
Machine Model
Lead Temperature:
Soldering, (10 sec.)
Vapor Phase (60 sec.)
Infrared (15 sec.)
0.3V to 14V
Indefinite
280°C/W
350 mW
2 kV
200V
+260°C
+215°C
+220°C
(1) “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications and test
conditions, see Electrical Characteristics - LM4121-1.250V and Electrical Characteristics - LM4121-ADJ tables. The ensured
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated
under the listed test conditions.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) Without PCB copper enhancements. The maximum power dissipation must be de-rated at elevated temperatures and is limited by TJMAX
(maximum junction temperature), θJ-A (junction to ambient thermal resistance) and TA (ambient temperature). The maximum power
dissipation at any temperature is: PDissMAX = (TJMAX TA)/θJ-A up to the value listed in the Absolute Maximum Ratings.
(4) The human body model is a 100 pF capacitor discharged through a 1.5 kresistor into each pin. The machine model is a 200 pF
capacitor discharged directly into each pin.
2
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Product Folder Links: LM4121
Copyright © 2000–2013, Texas Instruments Incorporated



Part Number LM4121
Description Precision Micropower Low Dropout Voltage Reference
Maker etcTI
Total Page 3 Pages
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LM4121 Datasheet PDF





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