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- Model
- LM4121
- Industry
- Industrial
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- Last added
- 2012-05-08
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National Semiconductor LM4121 Precision Micropower Low Dropout Voltage Reference Datasheet
The LM4121 provides a high‑accuracy 1.25 V reference (or adjustable version) with a typical supply current of 160 µA and power‑down current below 2 µA, making it suitable for battery‑powered and portable applications. It operates from 1.8 V to 12 V and is offered in a 5‑pin SOT‑23 package.
The datasheet details absolute maximum ratings, electrical characteristics such as 0.2 % (A‑grade) output accuracy, 50 ppm/°C temperature coefficient, and typical application circuits including programmable current sources and low‑battery detectors. Industrial temperature range is –40 °C to +85 °C, with an extended range to –40 °C to +125 °C available on request.
National Semiconductor LM4121 specifications
| Output Voltage Accuracy (A‑grade) | 0.2 % |
|---|---|
| Input Voltage Range | 1.8 V to 12 V |
| Package | 5‑pin SOT‑23 |
Source: National Semiconductor LM4121 Precision Micropower Low Dropout Voltage Reference Datasheet
All National Semiconductor LM4121 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What temperature range does the LM4121 guarantee its specifications?
It guarantees specifications from –40 °C to +85 °C (industrial range) and can be qualified for –40 °C to +125 °C on request.
From: National Semiconductor LM4121 Precision Micropower Low Dropout Voltage Reference Datasheet
What output voltage options are available for the LM4121?
The device is offered with a fixed 1.25 V output and an adjustable version.
From: National Semiconductor LM4121 Precision Micropower Low Dropout Voltage Reference Datasheet
What is the typical supply current of the LM4121?
The typical supply current is 160 µA.
From: National Semiconductor LM4121 Precision Micropower Low Dropout Voltage Reference Datasheet
What input voltage range can the LM4121 operate over?
It operates from 1.8 V up to 12 V input.
From: National Semiconductor LM4121 Precision Micropower Low Dropout Voltage Reference Datasheet