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Texas Instruments LM4040CIM3-5.0
- Part No.:
- LM4040CIM3-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3-5.0.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,661
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Product details
Overview
LM4040CIM3-5.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 5.0 V reverse breakdown voltage with ±0.5% initial tolerance (C grade) at 25°C, 74 μA minimum operating current, and 100 ppm/°C max temperature coefficient - used for ADC/DAC biasing, sensor excitation, and portable instrumentation power rails.
For engineers reviewing the LM4040CIM3-5.0 datasheet, LM4040CIM3-5.0 pinout, LM4040CIM3-5.0 application, or LM4040CIM3-5.0 equivalent, this page provides verified electrical specs, thermal behavior, industrial-grade temperature performance (−40°C to +85°C), and real-world substitution guidance - all grounded in TI's production-tested SNOS633K revision K data sheet.
Technical Context
The LM4040CIM3-5.0 operates as a two-terminal shunt reference: cathode accepts input current while anode is grounded, establishing precise 5.0 V across its terminals via Zener-zap trimmed bandgap architecture. It requires no output capacitor and remains stable with capacitive loads up to 10 nF.
Its curvature-corrected bandgap core delivers low dynamic impedance (≤0.9 Ω at 1 mA), wide operating current range (74 μA to 15 mA), and low wideband noise (35 μVrms, 10 Hz–10 kHz), enabling high-resolution analog signal chains in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and factory-trimmed - sets accurate bias point for analog circuits without external adjustment. |
| Initial Tolerance | ±0.5% at 25°C (C grade) - corresponds to ±25 mV absolute error, suitable for 12-bit system references. |
| Temp Coefficient | Max 100 ppm/°C over −40°C to +85°C - contributes ≤±6.5 mV drift across industrial range, critical for temperature-stable calibration. |
| Min Operating Current | 74 μA at 25°C - enables ultra-low-power operation in battery-backed systems and energy-harvesting nodes. |
| Dynamic Impedance | 0.3–0.9 Ω at 1 mA, 120 Hz - ensures minimal load-induced voltage shift during transient current demand. |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - supports high-SNR data acquisition where reference noise directly limits ENOB. |
| Long-Term Stability | 120 ppm after 1000 hours - predicts <±0.05% output drift over first year in continuous operation. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-standard footprint. Anode (pin 2) connects to ground; cathode (pin 1) carries shunt current and defines output voltage node; pin 3 is no-connect and must float or tie to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / output voltage node | Current enters here; 5.0 V appears between cathode and anode - functions as regulated voltage source when series resistor supplies current. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; defines return path for shunt current and establishes 0 V reference for output voltage. |
| NC (Pin 3) | No-connect | Internally unconnected; must remain floating or tied to pin 2 (anode) - not usable as feedback or trim node. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact PCB layouts without stability-compromising bypass components. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - eliminates need for isolation resistors in ADC reference buffers. |
| Micropower operation | 74 μA minimum current allows use in always-on monitoring circuits powered by coin cells or energy harvesters. |
| Industrial temperature range | Specified performance from −40°C to +85°C - validated for deployment in outdoor sensors, factory automation, and motor drives. |
| Low dynamic impedance | Sub-1 Ω impedance minimizes voltage droop during fast load transients - essential for multiplexed SAR ADC references. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and battery-powered operation. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0 V excitation for precision resistive sensor front-end and ADC reference rail. Use Value: ±0.5% initial accuracy and 100 ppm/°C TC ensure <±0.1% total error across operating temperature, meeting Class II meter requirements. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA loop signals. IC Role / Device Role / Timing Role: Precision 5.0 V reference for 24-bit delta-sigma ADC converting conditioned current-loop voltage drops. Use Value: 35 μVrms noise and sub-1 Ω dynamic impedance preserve ENOB >20 bits under varying load conditions. |
| Energy Management Units | Automotive Body Control Modules |
Use Scenario: Smart electricity meter with tamper detection and real-time energy calculation. IC Role / Device Role / Timing Role: Reference for metrology-grade ADC sampling voltage and current transformers. Use Value: 120 ppm long-term stability ensures calibration validity over 10-year field life without recalibration cycles. |
Use Scenario: In-vehicle cabin temperature sensor interface with LIN bus reporting. IC Role / Device Role / Timing Role: Stable 5.0 V bias for thermistor measurement bridge and op-amp signal conditioning. Use Value: Micropower 74 μA start-up current enables operation from vehicle battery during sleep mode with <1 μA quiescent drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | Adjustable 2.5 V reference (2.495–36 V via resistors); higher min current (1 mA); 2% initial tolerance. | Requires external resistors for 5 V setting; less accurate and noisier (120 μVrms) - unsuitable for high-resolution metrology. | Select only if adjustable output or higher current capability is needed; not a drop-in replacement for LM4040CIM3-5.0. |
| MAX6008BEUR+T | Fixed 5.0 V shunt reference; ±0.2% initial tolerance; 60 μA min current; 75 ppm/°C TC; SC70-3 package. | Higher accuracy and lower TC, but SC70 footprint differs from SOT-23 - requires PCB redesign and requalification. | Choose when tighter tolerance and lower drift are mandatory and board layout can be modified. |
Compared with TL431CDBZR and MAX6008BEUR+T, the LM4040CIM3-5.0 offers optimal balance of SOT-23 compatibility, C-grade accuracy, micropower startup, and proven stability in cost-sensitive industrial designs - making it preferred for space-constrained, battery-aware, and calibration-critical applications.
Availability
LM4040CIM3-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management units requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for LM4040CIM3-5.0 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 is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and high-volume manufacturing.
The LM4040-N product line delivers micropower, fixed-voltage shunt references optimized for space-constrained, low-power, and high-accuracy applications - including portable test equipment, industrial sensors, and automotive subsystems.
FAQ
What is the maximum operating current for LM4040CIM3-5.0?
The LM4040CIM3-5.0 supports a maximum operating current of 15 mA, as specified in TI's SNOS633K datasheet Section 6.3. Exceeding this limit risks thermal overload and permanent damage, especially in the SOT-23 package with its 326°C/W junction-to-ambient thermal resistance. Derating is required above 25°C ambient.
Does LM4040CIM3-5.0 require an external capacitor for stability?
No, the LM4040CIM3-5.0 does not require an external output capacitor for stability. Its internal design ensures unconditional stability even with capacitive loads up to 10 nF, as confirmed in the "Features" and "Description" sections of the official datasheet. This simplifies layout and reduces BOM count.
What is the temperature range specification for LM4040CIM3-5.0?
The LM4040CIM3-5.0 is rated for the industrial temperature range of −40°C to +85°C (Grade I), with full electrical specifications guaranteed across this interval. The extended range (−40°C to +125°C) applies only to specific variants like LM4040CIM3-5.0-Q1 - standard LM4040CIM3-5.0 is not characterized for operation beyond +85°C.
How does the LM4040CIM3-5.0 achieve its 100 ppm/°C temperature coefficient?
The LM4040CIM3-5.0 achieves its max 100 ppm/°C temperature coefficient through bandgap reference temperature drift curvature correction, implemented at wafer sort using Zener-zap trimming. This compensation technique counteracts second-order thermal effects, ensuring linearized voltage vs. temperature behavior across −40°C to +85°C.
Can LM4040CIM3-5.0 be used in automotive applications?
The standard LM4040CIM3-5.0 is not qualified for automotive use. For AEC-Q100 Grade 1 or Grade 3 applications, TI specifies the LM4040CIM3-5.0-Q1 variant - which shares the same electrical specs but adds automotive qualification, enhanced ESD robustness (±2000 V HBM), and extended temperature validation. Use LM4040CIM3-5.0-Q1 for under-hood or infotainment modules.
LM4040CIM3-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
LM4040CIM3-5.0 FAQ
1.How can I place an order for LM4040CIM3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3-5.0 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 LM4040CIM3-5.0 reliable?
The price and inventory of LM4040CIM3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040CIM3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3-5.0?
LM4040CIM3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3-5.0 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 LM4040CIM3-5.0?
For technical support, including LM4040CIM3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3-5.0 requirements.
6.How does Aetrix verify that LM4040CIM3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3-5.0 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 LM4040CIM3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040CIM3-5.0?
All LM4040CIM3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3-5.0, 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 LM4040CIM3-5.0 part is unused and in its original packaging.
Return procedure for LM4040CIM3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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