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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)：2.5V
- Voltage - Output (Max)：-
- Current - Output：15 mA
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：5-TSSOP, SC-70-5, SOT-353
- Supplier Device Package：SC-70-5
- Grade：-
- Qualification：-
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Overview
The LM4040BIM7-2.5/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed output voltage of 2.5 V with an initial accuracy tolerance of ±0.2%. The device operates with a quiescent current of 1 µA and supports a maximum cathode current of 15 mA. It features a temperature coefficient of 100 ppm/°C and functions within an industrial temperature range of -40 °C to +125 °C. The component is housed in a compact SOT-23-3 (SC-70-5) surface-mount package.
Feature Summary
- Provides stable fixed voltage reference output suitable for space-constrained designs
- Operates with ultra-low quiescent current for power-sensitive applications
- Maintains stability when driving capacitive loads
Applications
- Battery-powered measurement instruments
- Portable data terminals
- Embedded systems requiring precise voltage references
Procurement Notes
Verify the manufacturer designation as Texas Instruments despite the historical National Semiconductor branding. Confirm the specific suffix 'NOPB' indicates lead-free compliance and RoHS adherence. Ensure the package type matches the SC-70-5 or SOT-23-3 footprint requirements for your PCB layout. Cross-reference the temperature coefficient specification if operating near extreme environmental limits.
Selection Notes
Select this component when a low-cost, high-accuracy reference is required for battery-operated devices. The 1 µA operating current makes it ideal for extending battery life compared to standard references. The ±0.2% initial accuracy ensures sufficient precision for most general-purpose analog circuits without requiring external trimming.
Part Context
This part belongs to the LM4040 family of 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. Accuracy grades include A (±0.1%), B (±0.2%), C (±0.5%), and D (±1%). The LM4040 series is designed for applications where small size and low power consumption are critical design constraints.
Replacement Considerations
LM4040BIM3X-5.0/NOPB: Different output voltage (5.0 V vs 2.5 V). LM4040CIM7-4.1/NOPB: Different accuracy grade and voltage. Verify pinout compatibility and thermal performance before substituting.
