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Texas Instruments LM4040DEM3X-5.0
- Part No.:
- LM4040DEM3X-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3X-5.0.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,140
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Product details
Overview
LM4040DEM3X-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 ±1.0% initial tolerance (Grade D) at 25°C, 74 μA minimum operating current, and 100 ppm/°C max temperature coefficient across −40°C to +125°C. It serves as a compact, capacitor-tolerant reference for ADC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040DEM3X-5.0 datasheet, LM4040DEM3X-5.0 pinout, LM4040DEM3X-5.0 application, or LM4040DEM3X-5.0 equivalent, key selection criteria include industrial/extended temperature operation, low dynamic impedance (≤1.1 Ω), wide 74 μA–15 mA current range, and SOT-23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4040DEM3X-5.0 uses Zener-zap trimming during wafer sort to achieve ±1.0% initial accuracy and integrates bandgap-derived curvature correction for stable voltage over temperature. Its shunt topology requires an external current-limiting resistor and operates without output capacitance-yet remains stable with any capacitive load up to 10 nF.
It features low wideband noise (35 μVrms, 10 Hz–10 kHz), thermal hysteresis of 0.08%, and long-term stability of 120 ppm after 1000 hours. Designed for AEC-Q100 Grade 3 compliance in SOT-23, it supports automotive and industrial applications where supply headroom is limited and board area is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage; provides precise DC reference for analog signal chains and calibration circuits. |
| Initial Tolerance | ±1.0% at 25°C (Grade D); enables single-point calibration in production test without trimming. |
| Temp Coefficient | Max 100 ppm/°C (industrial range), 150 ppm/°C (extended range); ensures ≤±25 mV drift over −40°C to +125°C. |
| Operating Current | 74 μA min to 15 mA max; supports ultra-low-power battery systems and high-current DAC references. |
| Dynamic Impedance | ≤1.1 Ω at 1 mA; minimizes load-induced voltage variation in precision feedback loops. |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz); suitable for 16-bit+ data acquisition without added filtering. |
| Thermal Hysteresis | 0.08% (≈4 mV); guarantees repeatable voltage after thermal cycling in field-deployed equipment. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, 0.95 mm height, gull-wing leads; RoHS-compliant, Pb-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Reference ground node | Must be connected to system ground; defines 0 V reference for cathode voltage measurement. |
| Cathode (Pin 1) | Shunt current input / output voltage node | Supplies regulated 5.0 V when biased with external resistor; sinks all load and reference current. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating or tied to Anode (Pin 2) per TI design guidance. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into space-limited designs without stability-compromising bypass components. |
| Tolerates capacitive loads | Stable with ≥10 nF load capacitance; eliminates need for isolation resistors in sensor interface circuits. |
| Zener-zap trimmed accuracy | Ensures ±1.0% initial tolerance without post-package trimming, reducing manufacturing cost and test time. |
| AEC-Q100 Grade 3 qualified | Validated for automotive applications with extended temperature operation (−40°C to +125°C). |
| Low 35 μVrms noise | Supports high-resolution measurements in portable multimeters and medical sensors without noise floor degradation. |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered environmental monitoring units logging temperature, humidity, and pressure over multi-day deployments. IC Role / Device Role / Timing Role: Shunt reference for 16-bit SAR ADC and analog front-end op-amps, providing stable 5.0 V excitation and conversion reference. Use Value: 74 μA minimum current enables >1-year runtime on coin-cell batteries; SOT-23 footprint saves PCB area versus TO-92 alternatives. |
Use Scenario: Occupancy detection and air quality sensing modules mounted near vehicle HVAC ducts. IC Role / Device Role / Timing Role: Precision voltage reference for MEMS pressure transducers and NTC thermistor bias networks. Use Value: AEC-Q100 Grade 3 qualification and 125°C operation ensure reliability in under-dash thermal environments. |
| Industrial Process Transmitters | Calibration Equipment |
Use Scenario: 4–20 mA loop-powered field instruments measuring flow, level, or pH in chemical plants. IC Role / Device Role / Timing Role: Stable 5.0 V reference for DAC-based current loop control and sensor signal conditioning. Use Value: 100 ppm/°C tempco and 0.08% thermal hysteresis maintain <0.1% full-scale accuracy across ambient shifts. |
Use Scenario: Benchtop multimeters and automated test equipment requiring traceable voltage standards. IC Role / Device Role / Timing Role: Primary reference source for internal ADCs and external calibration verification points. Use Value: ±1.0% initial tolerance and 120 ppm long-term stability support ISO/IEC 17025-compliant calibration intervals. |
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 | Fixed 5.0 V, ±0.5% initial tolerance (Grade C), 50 ppm/°C max tempco, SOT-23-3 package. | Better accuracy and lower tempco; higher minimum current (100 μA) limits ultra-low-power use. | Select TL4050C50IDBZR when tighter initial tolerance and lower drift outweigh current budget constraints. |
| MAX6005EUR+T | 5.0 V, ±0.5% initial tolerance, 75 ppm/°C max tempco, SOT-23-3, 60 μA min current. | Lower min current enables longer battery life; not AEC-Q100 qualified. | Choose MAX6005EUR+T for portable industrial tools where automotive qualification is unnecessary. |
Compared with LM4040DEM3X-5.0, TL4050C50IDBZR offers superior accuracy but demands higher bias current, while MAX6005EUR+T reduces power consumption at the expense of automotive-grade reliability-making LM4040DEM3X-5.0 the balanced choice for cost-sensitive, temperature-varying embedded systems.
Availability
LM4040DEM3X-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial process transmitters requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040DEM3X-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-qualified components.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-reliability applications-including automotive, industrial sensing, and portable test equipment.
FAQ
What is the operating temperature range for LM4040DEM3X-5.0?
The LM4040DEM3X-5.0 is rated for industrial and extended temperature operation: −40°C to +125°C. This range is validated per AEC-Q100 Grade 3 requirements, making LM4040DEM3X-5.0 suitable for under-hood automotive and industrial control environments where thermal stress is significant.
Does LM4040DEM3X-5.0 require an external capacitor for stability?
No, LM4040DEM3X-5.0 does not require an external output capacitor and remains stable with any capacitive load-including sensor cables and ADC input capacitance up to 10 nF. Its internal design eliminates the need for external compensation, simplifying layout and reducing BOM count.
What is the minimum operating current for LM4040DEM3X-5.0?
The LM4040DEM3X-5.0 requires a minimum operating current of 74 μA at 25°C to maintain regulation. At full temperature range (−40°C to +125°C), this increases to 73 μA for Grade E and 74 μA for Grade D-ensuring reliable startup and regulation in ultra-low-power systems.
How does the pin configuration of LM4040DEM3X-5.0 differ from other LM4040 variants?
LM4040DEM3X-5.0 uses the standard SOT-23-3 (DBZ) pinout: Pin 1 = Cathode (output), Pin 2 = Anode (ground), Pin 3 = NC (no connect). Unlike SC70 or TO-92 versions, the SOT-23 variant has no functional third pin-Pin 3 must remain floating or be tied to Pin 2 per TI's design guidelines.
Is LM4040DEM3X-5.0 compatible with lead-free reflow processes?
Yes, LM4040DEM3X-5.0 is RoHS-compliant and rated for lead-free reflow with a peak temperature of 260°C for 30 seconds. Its SOT-23 package meets JEDEC J-STD-020 moisture sensitivity level 1, eliminating bake requirements prior to assembly.
LM4040DEM3X-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
LM4040DEM3X-5.0 FAQ
1.How can I place an order for LM4040DEM3X-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3X-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 LM4040DEM3X-5.0 reliable?
The price and inventory of LM4040DEM3X-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 LM4040DEM3X-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040DEM3X-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3X-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3X-5.0?
LM4040DEM3X-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3X-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 LM4040DEM3X-5.0?
For technical support, including LM4040DEM3X-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3X-5.0 requirements.
6.How does Aetrix verify that LM4040DEM3X-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3X-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 LM4040DEM3X-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040DEM3X-5.0?
All LM4040DEM3X-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3X-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 LM4040DEM3X-5.0 part is unused and in its original packaging.
Return procedure for LM4040DEM3X-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DEM3X-5.0 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
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AZ431LBNTR-G1
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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