Overview
The LM4121IM5-ADJ is a precision bandgap voltage reference produced by Texas Instruments. This device is available in both fixed 1.25V and adjustable versions, offering up to 5 mA current source and sink capability. It is designed for low voltage operation, consuming a typical supply current of 160 µA and featuring a power-down mode that reduces the current to less than 2 µA. The LM4121 is ideal for battery-powered and portable applications due to its low operating voltage, low supply current, and power-down capability.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Output Voltage Initial Accuracy | ±0.2% (A Grade), ±0.5% (Standard) | % | ||
| Temperature Coefficient | 14 | 50 | ppm/°C | |
| Source and Sink Current Output | ±5 mA | mA | ||
| Supply Current | 160 | 250 | 275 | µA |
| Power-down Supply Current | 1 | 2 | µA | |
| Operating Temperature Range | -40°C | +85°C | °C | |
| Extended Temperature Range | -40°C | +125°C | °C | |
| Input Voltage Range | 1.8V | 12V | V | |
| Package Type | SOT-23 (DBV) | |||
| Pins | 5 |
Key Features
- Small SOT23-5 package
- Low voltage operation
- High output voltage accuracy: 0.2% (A Grade), 0.5% (Standard)
- Source and sink current output: ±5 mA
- Low supply current: 160 µA (Typ.)
- Low temperature coefficient: 50 ppm/°C
- Enable pin for power-down mode
- Output voltages: 1.25V and adjustable
- Industrial temperature range: -40°C to +85°C
Applications
- Portable, battery-powered equipment
- Instrumentation and process control
- Automotive and industrial applications
- Test equipment
- Data acquisition systems
- Precision regulators
- Battery chargers
- Base stations
- Communications
- Medical equipment
Q & A
- What is the typical supply current of the LM4121? The typical supply current is 160 µA.
- What are the output voltage options for the LM4121? The LM4121 is available in fixed 1.25V and adjustable versions.
- What is the temperature coefficient of the LM4121? The temperature coefficient is 50 ppm/°C.
- What is the maximum current output of the LM4121? The maximum current output is ±5 mA.
- What is the operating temperature range of the LM4121? The operating temperature range is -40°C to +85°C, with extended range up to +125°C.
- What package type is the LM4121 available in? The LM4121 is available in a 5-pin SOT-23 package.
- Does the LM4121 have a power-down mode? Yes, the LM4121 has a power-down mode that reduces the current to less than 2 µA.
- What are some common applications of the LM4121? Common applications include portable and battery-powered equipment, instrumentation, automotive and industrial applications, test equipment, and more.
- What is the input voltage range for the LM4121? The input voltage range is from 1.8V to 12V.
- Is the LM4121 suitable for high-precision applications? Yes, the LM4121 is suitable for high-precision applications due to its high output voltage accuracy and low temperature coefficient.
