Overview
The LM4040B20IDCKR 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 LM4040B20IDCKR offers a fixed output voltage of 2.048V with tight output tolerances and a low temperature coefficient, making it ideal for applications requiring stable and accurate 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 | Test Conditions | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| Reverse Breakdown Voltage (VZ) | IZ = 100μA, 25°C | V | 2.048 | 2.048 | 2.048 |
| Reverse Breakdown Voltage Tolerance (ΔVZ) | IZ = 100μA, 25°C | mV | -4.1 | 0 | 4.1 |
| Minimum Cathode Current (IZ,min) | 25°C | μA | 45 | 75 | 80 |
| Average Temperature Coefficient of Reverse Breakdown Voltage (αVZ) | IZ = 10mA, 25°C | ppm/°C | ±20 | ±20 | ±100 |
| Operating Temperature Range | °C | -40 | 85 | ||
| Package | SOT-23-3 |
Key Features
- Fixed output voltages of 2.048V, with tight output tolerances (maximum 0.2% for B grade) and low temperature coefficient (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 125°C for certain models.
- Space-saving SOT-23-3 and SC-70 packages.
Applications
- Data-Acquisition Systems.
- Energy Infrastructure.
- Analog Input Module.
- Field Transmitters.
- Precision Audio.
- Automotive Electronics.
Q & A
- What is the output voltage of the LM4040B20IDCKR?
The output voltage of the LM4040B20IDCKR is 2.048V.
- What is the temperature coefficient of the LM4040B20IDCKR?
The temperature coefficient of the LM4040B20IDCKR is 100 ppm/°C.
- What is the minimum cathode current required for the LM4040B20IDCKR?
The minimum cathode current required is 45μA.
- Does the LM4040B20IDCKR require an external capacitor for operation?
No, the LM4040B20IDCKR is stable with all capacitive loads and does not require an external capacitor.
- What are the operating temperature ranges for the LM4040B20IDCKR?
The operating temperature range for the LM4040B20IDCKR is –40°C to 85°C.
- In what package is the LM4040B20IDCKR available?
The LM4040B20IDCKR is available in a SOT-23-3 package.
- What are some typical applications for the LM4040B20IDCKR?
Typical applications include Data-Acquisition Systems, Energy Infrastructure, Analog Input Module, Field Transmitters, Precision Audio, and Automotive Electronics.
- What is the output noise of the LM4040B20IDCKR?
The output noise of the LM4040B20IDCKR is 35μVRMS typical.
- What is the maximum output voltage tolerance for the B grade LM4040?
The maximum output voltage tolerance for the B grade LM4040 is 0.2%.
- Can the LM4040B20IDCKR be used in portable applications?
