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Texas Instruments LM4040CEM3X-5.0
- Part No.:
- LM4040CEM3X-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CEM3X-5.0.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,590
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Product details
Overview
LM4040CEM3X-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 instrument calibration.
For engineers reviewing the LM4040CEM3X-5.0 datasheet, LM4040CEM3X-5.0 pinout, LM4040CEM3X-5.0 application, or LM4040CEM3X-5.0 equivalent, this page provides verified pin functions, real-world load regulation behavior (≤8 mV over 1–15 mA), thermal hysteresis (0.08%), noise performance (35 μVrms, 10 Hz–10 kHz), and validated automotive-grade alternatives.
Technical Context
The LM4040CEM3X-5.0 operates as a two-terminal shunt reference, sinking current through its cathode to maintain precise 5.0 V across external loads. Its bandgap-based Zener-zap trimmed architecture ensures stability without output capacitance and tolerates capacitive loads up to 10 nF.
It features curvature-corrected temperature drift compensation and low dynamic impedance (0.9 Ω typical at 1 mA), enabling accurate voltage setting in battery-powered data acquisition systems where supply headroom is constrained and thermal cycling occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and non-adjustable - sets reference level for analog signal chains. |
| Initial Tolerance | ±0.5% at 25°C (C grade) - corresponds to ±25 mV absolute error, suitable for 12-bit system accuracy. |
| Temp Coefficient | Max 100 ppm/°C over −40°C to +125°C - contributes ≤±50 mV drift across full extended range. |
| Min Operating Current | 74 μA at 25°C - enables ultra-low-power operation in energy-harvesting or coin-cell applications. |
| Dynamic Impedance | 0.9 Ω typical at 1 mA - minimizes load-induced voltage shift during transient current demand. |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - supports high-resolution measurement without added filtering. |
| Thermal Hysteresis | 0.08% - ensures repeatable voltage after thermal cycling between −40°C and +125°C. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-compliant footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode | Shunt current input / output voltage node | Connected to regulated 5.0 V rail; sinks all excess current to ground via external resistor. |
| Anode | Reference ground terminal | Must be connected to system ground; defines 0 V reference for cathode voltage. |
| NC | No-connect terminal | Internally unconnected; must float or tie to anode per TI specification - no routing required. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero external capacitance - reduces BOM count and PCB area in space-constrained designs. |
| Tolerates capacitive loads | Remains stable with up to 10 nF load capacitance - eliminates need for isolation resistors in ADC reference buffers. |
| Low quiescent current | 74 μA minimum operating current - extends battery life in portable instrumentation and IoT edge sensors. |
| Extended temperature range | Rated for −40°C to +125°C operation - qualified for under-hood automotive and industrial control environments. |
| Low thermal hysteresis | 0.08% voltage shift after thermal cycling - ensures repeatability in field-deployed test equipment and calibration tools. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
|
Use Scenario: Handheld multimeter using 16-bit SAR ADC with internal reference buffer. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0 V excitation for ADC reference input and sensor front-end. Use Value: ±0.5% initial tolerance and 100 ppm/°C TC ensure <0.1% total error across battery discharge and ambient temperature swings. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA loop signals. IC Role / Device Role / Timing Role: Precision voltage reference for current-to-voltage conversion and ADC biasing. Use Value: 74 μA min current and 0.9 Ω dynamic impedance minimize power loss and load regulation error in multi-channel designs. |
| Automotive Sensor Modules | Energy Management Units |
|
Use Scenario: Tire pressure monitoring system (TPMS) with MEMS pressure sensor and RF transmitter. IC Role / Device Role / Timing Role: Reference source for ratiometric sensor excitation and ADC reference in AEC-Q100 qualified design. Use Value: Extended −40°C to +125°C rating and 0.08% thermal hysteresis ensure consistent readings after vehicle thermal soak cycles. |
Use Scenario: Smart electricity meter with metrology-grade ADC and isolated power supply. IC Role / Device Role / Timing Role: Stable 5.0 V reference for polyphase energy measurement ICs and anti-tampering comparators. Use Value: 35 μVrms noise floor and curvature-compensated drift support Class 0.5 accuracy certification under IEC 62053. |
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 | Same 5.0 V output, ±0.5% tolerance, SOT-23-3, but higher 100 μA min current and 120 ppm/°C TC. | Less suitable for ultra-low-current battery systems; better for cost-sensitive industrial controls. | Select when lower unit cost is prioritized over micropower operation and tighter TC. |
| MAX6008AEUR+T | 5.0 V output, ±0.2% tolerance (A grade), SOT-23-3, 60 μA min current, but only rated to +85°C. | Not qualified for extended temperature automotive use; preferred in commercial-grade portable devices. | Select when higher initial accuracy is needed and operating temperature stays below 85°C. |
Compared with LM4040CEM3X-5.0, TL4050C50IDBZR trades lower cost for higher min current and drift, while MAX6008AEUR+T offers tighter initial tolerance at the expense of temperature range - making LM4040CEM3X-5.0 optimal for extended-range, micropower shunt reference needs.
Availability
LM4040CEM3X-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and energy management units requiring stable component supply with guaranteed long-term continuity and traceable sourcing.
Supply support for LM4040CEM3X-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 automotive qualification.
The LM4040-N family was engineered for high-accuracy, low-power shunt referencing in space-constrained and thermally demanding applications - particularly targeting portable test gear, automotive sensors, and industrial data loggers.
FAQ
What is the operating temperature range for LM4040CEM3X-5.0?
The LM4040CEM3X-5.0 is specified for operation from −40°C to +125°C (extended temperature grade E), making it suitable for under-hood automotive and industrial environments. This range is confirmed in Section 6.7 of the TI SNOS633K datasheet, where electrical characteristics are explicitly tested and guaranteed across this span for the C-grade, E-temp variant.
Does LM4040CEM3X-5.0 require an external capacitor for stability?
No, the LM4040CEM3X-5.0 does not require an external output capacitor for stability. Its internal design ensures unconditional stability even with zero load capacitance, and it tolerates capacitive loads up to 10 nF - a key advantage over older shunt references that mandate minimum capacitance.
What is the minimum cathode current needed for LM4040CEM3X-5.0 to regulate at 5.0 V?
The LM4040CEM3X-5.0 requires a minimum cathode current of 74 μA at 25°C to maintain regulation at its nominal 5.0 V output. This value increases slightly with temperature and is defined in Table 6.3 (Recommended Operating Conditions) of the TI datasheet for the 5-V version with C-grade and extended temperature rating.
How does the LM4040CEM3X-5.0 achieve low temperature drift?
The LM4040CEM3X-5.0 achieves low temperature drift through bandgap reference temperature drift curvature correction and Zener-zap trimming during wafer sort. This results in a maximum average temperature coefficient of 100 ppm/°C over −40°C to +125°C, as verified in Section 6.7 of the official TI datasheet.
Is LM4040CEM3X-5.0 pin-compatible with other LM4040 variants in SOT-23?
Yes, the LM4040CEM3X-5.0 uses the standard DBZ (SOT-23-3) package with identical pinout (Cathode, Anode, NC) as all other LM4040-N SOT-23 variants - including LM4040AIM3X-5.0 and LM4040BIM3X-5.0 - enabling drop-in replacement within the same voltage and grade family.
LM4040CEM3X-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:
- 83 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CEM3X-5.0 FAQ
1.How can I place an order for LM4040CEM3X-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CEM3X-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 LM4040CEM3X-5.0 reliable?
The price and inventory of LM4040CEM3X-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 LM4040CEM3X-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040CEM3X-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CEM3X-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CEM3X-5.0?
LM4040CEM3X-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CEM3X-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 LM4040CEM3X-5.0?
For technical support, including LM4040CEM3X-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CEM3X-5.0 requirements.
6.How does Aetrix verify that LM4040CEM3X-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040CEM3X-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 LM4040CEM3X-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040CEM3X-5.0?
All LM4040CEM3X-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CEM3X-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 LM4040CEM3X-5.0 part is unused and in its original packaging.
Return procedure for LM4040CEM3X-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CEM3X-5.0 Tags
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TL431AIDBZR
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TL431BQDBZR
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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