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Product Detailed Parameters
- Description：IC VREF SHUNT 0.1% SOT23-3
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Fixed
- Voltage - Output (Min/Fixed)：5V
- Current - Output：15 mA
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
Download product information
Overview
The LM4040A50IDBZT is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 5V with an initial accuracy tolerance of ±0.1%. The device features a maximum temperature coefficient of 100ppm/°C and operates within a free-air temperature range of -40°C to 85°C. It functions with a cathode current range from a minimum of 74µA to a maximum of 15mA, housed in a surface-mount SOT-23-3 package.
Feature Summary
- Delivers high-precision voltage regulation with tight initial accuracy tolerances for demanding measurement applications.
- Maintains stable output performance across wide operating current ranges and temperature variations due to low temperature coefficients.
- Operates efficiently at micropower levels, requiring minimal quiescent current suitable for battery-powered portable systems.
Applications
- Data-acquisition systems
- Energy infrastructure monitoring
- Analog input modules
- Field transmitters
Procurement Notes
Verify the specific grade suffix 'A' corresponds to the required 0.1% initial accuracy and 100ppm/°C temperature coefficient specifications. Confirm the 'I' suffix indicates the industrial temperature range (-40°C to 85°C) rather than extended range options. Ensure the DBZ package designation matches the intended SOT-23-3 footprint requirements for the target PCB layout.
Selection Notes
Select this component when precise 5V reference stability is critical under varying thermal conditions. The A-grade classification ensures superior initial accuracy compared to C or D grades. Consider the minimum operating current requirement of 74µA to ensure proper regulation during low-load scenarios in the circuit design.
Part Context
This part belongs to the LM4040 series of shunt voltage references, which utilize fuse and Zener-zap reverse breakdown voltage trim during wafer sort. The series offers various output voltages and accuracy grades, allowing designers to balance cost and performance. The LM4040A50IDBZT represents the highest accuracy tier within the standard industrial temperature variant lineup.
Replacement Considerations
LM4040B50IDBZT (0.2% accuracy)
FAQ
What is the minimum cathode current required for stable operation?
The minimum cathode current is specified as 74µA at 25°C and 80µA across the full temperature range.
Does this device require an external output capacitor?
No, the LM4040 is stable with all capacitive loads and does not require an external output capacitor for operation.
