Overview
The LM4040C20IDCKR is a precision micropower shunt voltage reference from Texas Instruments. This device is part of the LM4040 series, known for its versatility and ease of use across a wide range of applications. The LM4040C20IDCKR offers a fixed output voltage of 2.048V and is characterized by its tight output tolerances and low temperature coefficient, making it ideal for applications requiring stable voltage references.
The device is packaged in a space-saving SOT-23-3 package and operates over an ambient temperature range of –40°C to 85°C. It requires a minimum current of 45μA and is stable with all capacitive loads, eliminating the need for external capacitors.
Key Specifications
| Parameter | Typical | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Reverse Breakdown Voltage (VZ) | 2.048 | - | - | V |
| Reverse Breakdown Voltage Tolerance (ΔVZ) | - | -10 | 10 | mV |
| Minimum Cathode Current (IZ,min) | 45 | - | 80 | μA |
| Average Temperature Coefficient (αVZ) | ±15 | - | ±100 | ppm/°C |
| Operating Temperature Range | - | -40 | 85 | °C |
| Maximum Cathode Current (IZ) | - | - | 15 | mA |
| Output Noise | 35 | - | - | μVRMS |
| Package Type | SOT-23-3 | - | - | - |
Key Features
- Fixed output voltage of 2.048V with tight output tolerances and low temperature coefficient (maximum 0.5% for C grade and 100 ppm/°C).
- Low output noise: 35μVRMS typical.
- Wide operating current range: 45μA typical to 15mA.
- Stable with all capacitive loads; no output capacitor required.
- Available in extended temperature range: –40°C to 85°C.
- Space-saving SOT-23-3 package.
Applications
- Data-Acquisition Systems
- Energy Infrastructure
- Analog Input Module
- Field Transmitters
- Precision Audio
- Automotive Electronics
Q & A
- What is the output voltage of the LM4040C20IDCKR? The output voltage of the LM4040C20IDCKR is 2.048V.
- What is the temperature coefficient of the LM4040C20IDCKR? The temperature coefficient is ±100 ppm/°C for the C grade.
- What is the minimum cathode current required for the LM4040C20IDCKR? The minimum cathode current is 45μA.
- Does the LM4040C20IDCKR require an external capacitor for operation? No, it is stable with all capacitive loads and does not require an external capacitor.
- What is the operating temperature range of the LM4040C20IDCKR? The operating temperature range is –40°C to 85°C.
- What package type is the LM4040C20IDCKR available in? It is available in a SOT-23-3 package.
- What are some common applications of the LM4040C20IDCKR? Common applications include data-acquisition systems, energy infrastructure, analog input modules, field transmitters, precision audio, and automotive electronics.
- What is the maximum cathode current for the LM4040C20IDCKR? The maximum cathode current is 15mA.
- How much output noise does the LM4040C20IDCKR typically produce? The LM4040C20IDCKR typically produces 35μVRMS of output noise.
- What is the junction-to-ambient thermal resistance of the LM4040C20IDCKR in a SOT-23-3 package? The junction-to-ambient thermal resistance is 206°C/W.
