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Product Detailed Parameters
- Description：LM4040-N 100-PPM/C PRECISION MIC
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Output Type：Fixed
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Current - Output：15 mA
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA)
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The LM4040DIZ-5.0/LFT1 is a precision micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed 5.0 V output with an initial accuracy of +/- 1%. The device operates over an industrial temperature range of -40 °C to +125 °C and features a maximum temperature coefficient of 70 ppm/°C. It utilizes a SOT-23 package and draws ultra-low operating current, typically 10 µA at 25 °C.
Feature Summary
- Provides stable fixed output voltage across the industrial temperature range
- Ultra-low operating current suitable for power-restricted designs
- High precision with low temperature coefficient
- Stable operation with capacitive loads
Applications
- Battery-powered systems requiring precise voltage references
- Portable instrumentation circuits
- Power supply feedback loops
- Data acquisition systems
Procurement Notes
Verify the manufacturer designation as National Semiconductor or Texas Instruments on the component marking. Confirm the suffix LFT1 corresponds to the specific tape-and-reel packaging configuration. Ensure the device meets RoHS compliance requirements if applicable to your manufacturing process. Cross-reference the datasheet revision to confirm pinout and electrical characteristics match your design specifications.
Selection Notes
Select this component when a 5.0 V reference with 1% initial accuracy is required in a compact SOT-23 package. Consider the 70 ppm/°C temperature coefficient for applications demanding stability over wide temperature variations. The low quiescent current makes it suitable for battery-operated devices where minimizing standby power consumption is critical.
Part Context
This component belongs to the LM4040 family of precision micropower shunt voltage references. The family offers various output voltages including 2.048 V, 2.5 V, 3.0 V, 4.096 V, and 5.0 V. Different suffixes indicate varying initial accuracies (A, B, C, D) and package types. The LM4040 series is designed for high stability and low noise performance in space-constrained applications.
Replacement Considerations
LM4040BIZ-5.0/NOPB: Offers higher precision (0.2%) in the same package. LM4040CEM3-5.0: Alternative version with 0.5% accuracy. LM4040DIM3-5.0: Version with 0.1% accuracy. Verify thermal and electrical compatibility before substitution.
