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Texas Instruments LM4040CIM3X-5.0
- Part No.:
- LM4040CIM3X-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3X-5.0.pdf
- Description:
- LM4040-N 100-PPM/C PRECISION MIC
- Quantity:
- Payment:
- Shipping:
Inventory:42,000
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Product details
Overview
LM4040CIM3X-5.0 from Texas Instruments (formerly National Semiconductor) is a precision micropower shunt voltage reference in SOT-23 package, delivering 5.000 V nominal reverse breakdown voltage with ±0.5% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 74 μA minimum operating current. It enables stable voltage regulation in space-constrained analog signal chains and battery-powered instrumentation.
For engineers reviewing the LM4040CIM3X-5.0 datasheet, LM4040CIM3X-5.0 pinout, LM4040CIM3X-5.0 application, or LM4040CIM3X-5.0 equivalent, key selection criteria include its shunt topology, no-output-capacitor requirement, industrial temperature range (−40°C to +85°C), low dynamic impedance (1.1 Ω max), and compatibility with capacitive loads in precision ADC biasing and sensor excitation circuits.
Technical Context
The LM4040CIM3X-5.0 operates as a two-terminal shunt reference, sinking current to maintain a precise 5.000 V across its cathode-anode terminals. Its bandgap-derived zener-zap trimmed structure provides curvature-corrected temperature drift and eliminates need for external stabilization capacitance.
It achieves ±0.5% accuracy over −40°C to +85°C using fuse-trimmed wafer-sort calibration, with low wideband noise (80 μVrms, 10 Hz–10 kHz) and thermal hysteresis of only 0.08%. Dynamic impedance remains ≤1.1 Ω at 1 mA, ensuring minimal output voltage shift under varying load currents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V nominal at 100 μA; defines stable reference point for ADCs, DACs, and comparators. |
| Initial Tolerance | ±0.5% at 25°C (C grade); ensures predictable system offset without post-assembly trimming. |
| Temp Coefficient | 100 ppm/°C max (−40°C to +85°C); limits voltage drift to ±4.25 mV over full industrial range. |
| Min Operating Current | 74 μA; sets lowest bias current for reliable regulation in ultra-low-power systems. |
| Dynamic Impedance | 1.1 Ω max at 1 mA; minimizes load-induced voltage error in high-precision feedback networks. |
| Wideband Noise | 80 μVrms (10 Hz–10 kHz); supports <16-bit ADC accuracy without additional filtering. |
| Long-Term Stability | 120 ppm after 1000 hrs; predicts minimal aging-induced calibration drift in field-deployed equipment. |
Pinout & Package
SOT-23-3 package (JEDEC TO-236AB, NS package MF03A), surface-mount, 1.3 mm × 2.9 mm footprint. Cathode (pin 1), anode (pin 2), and NC (pin 3) - pin 3 must be left floating or tied to pin 2 per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Reference Output Terminal | Connected to regulated 5.000 V node; sinks current to maintain voltage; requires series resistor from supply. |
| Pin 2 (Anode) | Ground Reference Terminal | Return path for shunt current; must connect to system ground with low-impedance trace. |
| Pin 3 (NC) | No Connect | Internally unconnected; must remain floating or tied to pin 2 to avoid parasitic coupling or ESD risk. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact PCB layouts without stability-compromising external components. |
| Tolerates capacitive loads | Stable operation with up to 15 mA sink current into any capacitive load, simplifying filter design for noise-sensitive circuits. |
| Fixed 5.000 V output | Eliminates external resistor network errors and reduces BOM count in fixed-reference applications. |
| Low 74 μA minimum current | Supports operation in battery-powered devices with >10-year shelf life and ultra-low standby power budgets. |
| Industrial temperature range | Validated performance from −40°C to +85°C ensures reliability in outdoor sensors, industrial controllers, and automotive body electronics. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC requiring stable reference under variable battery voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing 5.000 V reference to ADC's REF+ input. Use Value: ±0.5% initial tolerance and 100 ppm/°C TC ensure <0.1% total measurement error across operating temperature and battery discharge. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and successive-approximation ADC. Use Value: 80 μVrms noise and 1.1 Ω dynamic impedance preserve SNR and linearity in 16-bit data conversion. |
| Energy Management Systems | Precision Sensor Excitation |
Use Scenario: Smart electricity meter measuring voltage/current with metrology-grade accuracy. IC Role / Device Role / Timing Role: Reference source for isolated sigma-delta ADC measuring mains voltage. Use Value: Long-term stability (120 ppm) and thermal hysteresis (0.08%) minimize calibration drift between field recalibrations. |
Use Scenario: Bridge-based pressure transducer in medical diagnostic equipment. IC Role / Device Role / Timing Role: Excitation source for Wheatstone bridge, delivering stable 5.000 V across varying ambient temperatures. Use Value: Low tempco and no-output-capacitor design enable rapid power-up and consistent bridge output scaling without settling delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | 5.0 V, ±0.5%, SOT-23, 75 μA min current, 100 ppm/°C TC, but higher 120 μVrms noise. | Higher noise limits use in ≥18-bit systems; identical pinout and footprint. | Select when footprint compatibility is critical and noise budget allows >80 μVrms. |
| MAX6008AEUR+T | 5.0 V, ±0.2%, SOT-23, 60 μA min current, 75 ppm/°C TC, but requires 100 nF output capacitor for stability. | Superior accuracy and TC, but added capacitor increases board area and complicates layout. | Select when tighter initial tolerance and lower drift outweigh capacitor design overhead. |
Compared with TL4050C50IDBZR and MAX6008AEUR+T, the LM4040CIM3X-5.0 offers the best balance of no-capacitor operation, industrial temperature support, and proven long-term stability-making it optimal for cost-sensitive, space-constrained, and maintenance-averse embedded systems.
Availability
LM4040CIM3X-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, energy management systems, and precision sensor excitation requiring stable component supply across extended production lifecycles.
Supply support for LM4040CIM3X-5.0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments acquired National Semiconductor in 2011 and maintains full technical and manufacturing continuity for the LM4040 family.
The LM4040 series was designed specifically for micropower, space-constrained shunt reference applications where simplicity, stability, and low quiescent current are critical-targeting portable test equipment, industrial sensors, and battery-operated data loggers.
FAQ
What is the minimum operating current for LM4040CIM3X-5.0?
The LM4040CIM3X-5.0 requires a minimum operating current of 74 μA to maintain regulation within specification. This value is confirmed in the "Electrical Characteristics (Industrial Temperature Range)" table for the C-grade 5.0 V variant. Operating below this threshold may cause output voltage deviation exceeding ±0.5% tolerance. The LM4040CIM3X-5.0 sustains regulation up to 15 mA maximum current.
Does LM4040CIM3X-5.0 require an external output capacitor?
No, the LM4040CIM3X-5.0 does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback nodes. This eliminates layout constraints and component count-confirmed in the General Description and Features sections of the official datasheet for LM4040CIM3X-5.0.
What is the temperature coefficient of LM4040CIM3X-5.0?
The LM4040CIM3X-5.0 has a maximum average temperature coefficient of 100 ppm/°C over the industrial temperature range (−40°C to +85°C). This value is specified for the C grade and applies under conditions of IR = 1 mA. At IR = 100 μA, the typical TC is ±20 ppm/°C, but the guaranteed worst-case remains 100 ppm/°C. This ensures predictable voltage drift in LM4040CIM3X-5.0-based systems deployed in uncontrolled environments.
What package type is used for LM4040CIM3X-5.0?
The LM4040CIM3X-5.0 uses the SOT-23-3 package (JEDEC TO-236AB), also designated by National Semiconductor as package MF03A. It is a surface-mount, three-terminal package with 1.3 mm × 2.9 mm footprint and 1.0 mm height. Pin 3 is NC and must be left floating or connected to pin 2 per the official LM4040CIM3X-5.0 datasheet marking and connection diagrams.
How does LM4040CIM3X-5.0 compare to the A-grade version LM4040AIM3X-5.0?
The LM4040CIM3X-5.0 differs from LM4040AIM3X-5.0 primarily in initial tolerance (±0.5% vs. ±0.1%) and minimum operating current (74 μA vs. 54 μA). Both share identical 5.000 V nominal output, SOT-23 package, and industrial temperature range. The C grade trades tighter accuracy for cost efficiency while retaining the same low-noise (80 μVrms) and low-TC (100 ppm/°C) performance-making LM4040CIM3X-5.0 ideal for applications where ±0.5% is sufficient and BOM cost is prioritized.
LM4040CIM3X-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CIM3X-5.0 FAQ
1.How can I place an order for LM4040CIM3X-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3X-5.0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM4040CIM3X-5.0 reliable?
The price and inventory of LM4040CIM3X-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3X-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040CIM3X-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3X-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3X-5.0?
LM4040CIM3X-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3X-5.0 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM4040CIM3X-5.0?
For technical support, including LM4040CIM3X-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3X-5.0 requirements.
6.How does Aetrix verify that LM4040CIM3X-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3X-5.0 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM4040CIM3X-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040CIM3X-5.0?
All LM4040CIM3X-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3X-5.0, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM4040CIM3X-5.0 part is unused and in its original packaging.
Return procedure for LM4040CIM3X-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CIM3X-5.0 Tags
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TL431AIDBZR
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TL431BQDBZR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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