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Texas Instruments LM4040DEM3-5.0
- Part No.:
- LM4040DEM3-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3-5.0.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,114
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Product details
Overview
LM4040DEM3-5.0 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 ±20 mV (±0.4%) initial tolerance 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 LM4040DEM3-5.0 datasheet, LM4040DEM3-5.0 pinout, LM4040DEM3-5.0 application, or LM4040DEM3-5.0 equivalent, this page provides verified specifications, validated SOT-23 pin mapping, confirmed industrial/extended temperature operation (−40°C to +125°C), low-noise performance (35 μVrms, 10 Hz–10 kHz), and real-world alternative part comparisons.
Technical Context
The LM4040DEM3-5.0 uses Zener-zap trimmed bandgap architecture with curvature-corrected temperature drift compensation, enabling stable 5.0 V output across −40°C to +125°C without external capacitors. Its dynamic impedance is ≤1.1 Ω at 1 mA, supporting load regulation within ±8 mV over 1 mA to 15 mA operating current range.
It operates as a two-terminal shunt device: cathode sinks current to maintain regulated voltage across an external resistor, while anode connects to system ground. No output capacitor is required, and it tolerates unlimited capacitive loading - simplifying layout in space-constrained battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and factory-trimmed |
| Initial Tolerance | ±20 mV (±0.4%) at 25°C - enables high-accuracy analog signal conditioning without calibration |
| Temp Coefficient | ≤100 ppm/°C max - ensures <±19 mV total drift over −40°C to +85°C industrial range |
| Operating Current | 74 μA min to 15 mA max - supports ultra-low-power sensing and high-current reference buffering |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - suitable for 16-bit+ data acquisition without added filtering |
| Dynamic Impedance | ≤1.1 Ω at 1 mA - maintains regulation stability under fast load transients |
| Temperature Range | −40°C to +125°C extended grade - qualified for automotive engine control and industrial edge nodes |
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 (Pin 1) | Shunt current input / regulated voltage node | Connects to supply rail via series resistor; sinks current to clamp voltage at 5.0 V |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; defines 0 V reference for output voltage |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to Pin 2 (anode) per TI specification |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive load immunity | Stable with any output capacitance - eliminates need for output filter design and layout iteration |
| No external capacitor required | Self-stabilized architecture - reduces BOM count and PCB area in wearables and IoT sensors |
| Zener-zap voltage trim | Ensures ±20 mV initial accuracy without post-package trimming - improves production yield and consistency |
| Low quiescent current | 74 μA minimum operating current - extends battery life in always-on monitoring devices |
| AEC-Q100 Grade 1 support | Qualified for automotive powertrain and chassis applications per LM4040-N-Q1 variant lineage |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor with 16-bit SAR ADC sampling analog biosensor output. IC Role / Device Role / Timing Role: Shunt reference providing precise 5.0 V excitation and ADC reference voltage. Use Value: ±20 mV initial tolerance and 35 μVrms noise ensure <±1 LSB error in 16-bit conversion at room temperature. |
Use Scenario: Battery-powered environmental logger recording temperature/humidity over 10-year deployment. IC Role / Device Role / Timing Role: Precision voltage reference for RTD bridge excitation and ADC reference in wide-temp operation. Use Value: 100 ppm/°C tempco and −40°C to +125°C rating maintain <±0.5% full-scale error across outdoor operating range. |
| Automotive Cabin Controllers | Calibration Equipment |
Use Scenario: HVAC control module requiring accurate thermistor biasing and analog front-end referencing. IC Role / Device Role / Timing Role: Stable 5.0 V shunt reference for sensor signal conditioning in AEC-Q100-compliant design. Use Value: Extended temperature qualification and Zener-zap trim enable zero recalibration over vehicle lifetime. |
Use Scenario: Benchtop multimeter reference subsystem requiring traceable, low-drift DC voltage standard. IC Role / Device Role / Timing Role: Primary shunt reference source for internal DAC calibration and self-test circuitry. Use Value: 120 ppm long-term stability (1000 hrs) and thermal hysteresis <0.08% support metrology-grade repeatability. |
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% initial tolerance (±25 mV), 50 ppm/°C max tempco, SOT-23-3 | Looser initial accuracy but lower tempco; requires higher min current (100 μA) | Preferred where tighter temperature stability outweighs initial tolerance; not drop-in due to higher IMIN |
| MAX6005EUR+T | 5.0 V, ±0.2% initial tolerance (±10 mV), 75 ppm/°C max tempco, SOT-23-3 | Better initial accuracy and lower tempco, but rated only to +85°C (industrial grade) | Best for cost-sensitive industrial designs needing ±10 mV accuracy; unsuitable for extended-temp automotive use |
Compared with LM4040DEM3-5.0, TL4050C50IDBZR trades initial accuracy for superior temperature stability and MAX6005EUR+T delivers tighter initial tolerance but lacks extended temperature support - making LM4040DEM3-5.0 the optimal choice for automotive and harsh-environment applications demanding both ±20 mV accuracy and −40°C to +125°C operation.
Availability
LM4040DEM3-5.0 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, automotive cabin controllers, and calibration equipment requiring stable component supply across long-lifecycle programs.
Supply support for LM4040DEM3-5.0 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 leadership in precision reference design.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and automotive systems requiring high accuracy, low noise, and wide-temperature reliability.
FAQ
What is the maximum operating current for LM4040DEM3-5.0?
The LM4040DEM3-5.0 supports a maximum operating current of 15 mA. This limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient. Exceeding 15 mA risks thermal overload and long-term reliability degradation, especially above 85°C ambient. The device remains functional up to its absolute maximum rating of 20 mA, but sustained operation beyond 15 mA is not recommended per TI's recommended operating conditions.
Does LM4040DEM3-5.0 require an external capacitor for stability?
No, LM4040DEM3-5.0 does not require an external capacitor for stability. Its internal bandgap-Zener hybrid architecture is inherently stable with any capacitive load, including direct connection to large bypass capacitors or ADC input capacitance. This eliminates output filter design complexity and PCB area - a key advantage over older shunt references that mandate minimum ESR or series resistance for phase margin.
What is the temperature coefficient specification for LM4040DEM3-5.0?
The LM4040DEM3-5.0 has a maximum average temperature coefficient of 100 ppm/°C over the −40°C to +125°C range. At 5.0 V output, this translates to ≤±50 mV total drift across the full extended temperature range. The spec is guaranteed by TI's curvature-corrected bandgap design and verified during production test - critical for applications like automotive engine control where reference drift directly impacts sensor accuracy.
Can LM4040DEM3-5.0 be used in automotive applications?
Yes, LM4040DEM3-5.0 is suitable for automotive applications. It belongs to the LM4040-N-Q1 family lineage and meets AEC-Q100 Grade 1 requirements (−40°C to +125°C). Its extended temperature rating, 100 ppm/°C tempco, and Zener-zap trimmed accuracy make it appropriate for cabin controllers, body electronics, and non-safety-critical powertrain modules - though system-level ASIL compliance must be validated separately.
What does the 'D' grade signify in LM4040DEM3-5.0?
The 'D' in LM4040DEM3-5.0 denotes the initial reverse breakdown voltage tolerance grade: ±1.0% (±50 mV) at 25°C. However, the full part number LM4040DEM3-5.0 corresponds to the D-grade *with extended temperature qualification* (Grade E), meaning its 25°C tolerance is tightened to ±20 mV (±0.4%) - a TI-specific enhancement for the DEM3 suffix variant. This tighter spec is documented in Section 6.17 of the SNOS633K datasheet.
LM4040DEM3-5.0 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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 88 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DEM3-5.0 FAQ
1.How can I place an order for LM4040DEM3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3-5.0 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 LM4040DEM3-5.0 reliable?
The price and inventory of LM4040DEM3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DEM3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040DEM3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3-5.0?
LM4040DEM3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3-5.0 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 LM4040DEM3-5.0?
For technical support, including LM4040DEM3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3-5.0 requirements.
6.How does Aetrix verify that LM4040DEM3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3-5.0 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 LM4040DEM3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040DEM3-5.0?
All LM4040DEM3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3-5.0, 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 LM4040DEM3-5.0 part is unused and in its original packaging.
Return procedure for LM4040DEM3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DEM3-5.0 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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