Features: Small SOT23-5 package
Low voltage operation
High output voltage accuracy: 0.2%
Source and Sink current output:±5 mA
Supply current: 160 A 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)Application Portable, battery powered equipment
Instrumentation and process control
Automotive & Industrial
Test equipment
Data acquisition systems
Precision regulators
Battery chargers
Base stations
Communications
Medical equipmentPinout
Specifications
| Initial Accuracy (+/-) Max |
0.2, 0.5 % |
| Reference Voltage |
1.25 V, Adjustable |
| Tempco, max (ppm/C) |
50 ppm |
| Input Min Voltage |
1.8 Volt |
| Input Max Voltage |
14 Volt |
| Dropout Voltage |
0.25 Volt |
| Quiescent Current |
0.16 mA |
| Output Current |
5 mA |
| Voltage Noise (rms) |
30 uV |
| Long Term Stability (ppm/1000hr) |
100 ppm |
| Temperature Min |
-40 deg C |
| Temperature Max |
85 deg C |
| PowerWise |
Yes |
| View Using Catalog |
Maximum Voltage on input or
enable pins −0.3V to 14V
Output Short-Circuit Duration Indefinite
Power Dissipation(TA = 25°C):
MA05B package − JA 280°C/W
Power Dissipation 350 mW
ESD Susceptibility
Human Body Model 2 kV
Machine Model 200V
Lead Temperature:
Soldering, (10 sec.) +260°C
Vapor Phase (60 sec.) +215°C
Infrared (15 sec.) +220°CDescriptionThe 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.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM4121AIM5-1.2 |
LFAST1 |
0 |
18610 |
0 |
0 |
2335000 |
2 |
662562625 |
| LM4121AIM5-ADJ |
LFAST1 |
0 |
18610 |
0 |
0 |
2335000 |
2 |
662562625 |
| LM4121AIM5X-1.2 |
LFAST1 |
0 |
18610 |
0 |
0 |
2335000 |
2 |
662562625 |
| LM4121AIM5X-ADJ |
LFAST1 |
0 |
18610 |
0 |
0 |
2335000 |
2 |
662562625 |
| LM4121IM5-1.2 |
LFAST1 |
0 |
18610 |
0 |
0 |
2335000 |
2 |
662562625 |
| LM4121IM5-ADJ |
LFAST1 |
0 |
18610 |
0 |
0 |
2335000 |
2 |
662562625 |
| LM4121IM5X-1.2 |
LFAST1 |
0 |
18610 |
0 |
0 |
2335000 |
2 |
662562625 |
| LM4121IM5X-ADJ |
LFAST1 |
0 |
18610 |
0 |
0 |
2335000 |
2 |
662562625 |
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.
More Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-1932: Application Note 1932 LMP2021MAEVAL - Bridge Sensor Instrumentation Amplifier Evaluation Board User Guide |
176 Kbytes |
10-Dec-08 |
Download |
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
LM4121 Data Sheet
