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Texas Instruments LM4040DEM3X-3.0/NOPB
- Part No.:
- LM4040DEM3X-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3X-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,720
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Product details
Overview
LM4040DEM3X-3.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 3.0 V reverse breakdown voltage with ±0.5% initial tolerance (Grade C), 100 ppm/°C max temperature coefficient, 62 μA minimum operating current, and 35 μVRMS wideband noise (10 Hz–10 kHz). It serves as a compact, capacitor-free reference for ADC biasing, sensor excitation, and portable power monitoring circuits.
For engineers reviewing the LM4040DEM3X-3.0/NOPB datasheet, LM4040DEM3X-3.0/NOPB pinout, LM4040DEM3X-3.0/NOPB application, or LM4040DEM3X-3.0/NOPB equivalent, this page provides verified electrical specs, SOT-23 terminal mapping, real-world use cases, and two validated alternative parts for industrial and automotive-grade designs requiring low-drift, micropower voltage referencing.
Technical Context
The LM4040DEM3X-3.0/NOPB uses Zener-zap trimming and bandgap curvature correction to achieve tight initial accuracy and low thermal drift across −40°C to +125°C. Its shunt architecture operates without output capacitance and tolerates capacitive loads up to 10 nF, enabling direct integration into high-impedance feedback paths.
It functions as a two-terminal device: cathode accepts input current and delivers regulated 3.0 V at its node relative to anode (ground), with dynamic impedance of 0.9 Ω at 1 mA. The SOT-23-3 package supports board-level thermal management via 291.9°C/W junction-to-ambient resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and factory-trimmed - enables precise biasing without external adjustment. |
| Initial Tolerance | ±0.5% at 25°C (Grade C) - ensures ≤15 mV absolute error in calibration-critical signal chains. |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C - limits drift to ±30 mV across full extended temperature range. |
| Min Operating Current | 62 μA - allows operation from ultra-low-power sources such as coin cells or energy-harvesting circuits. |
| Wideband Noise | 35 μVRMS (10 Hz–10 kHz) - supports high-resolution data acquisition without added filtering overhead. |
| Dynamic Impedance | 0.9 Ω at 1 mA - maintains regulation stability under load transients common in multiplexed sensor systems. |
| Max Operating Current | 15 mA - defines upper power dissipation limit (306 mW in SOT-23) for thermal design margining. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, gull-wing leads, JEDEC standard footprint. Anode grounded, cathode supplies regulated voltage node, third pin (NC) must be left floating or tied to anode per TI specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated output node | Accepts external current; develops 3.0 V at this terminal relative to anode - connects directly to ADC REF+ or op-amp feedback. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground - forms the 0 V reference for the 3.0 V output; not a power supply rail. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; TI specifies it must float or tie to Pin 2 - no routing or PCB trace required. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained layouts in wearables and IoT nodes without compromising stability. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - eliminates need for isolation resistors in DAC buffer applications. |
| Zener-zap voltage trim | Ensures ±0.5% initial accuracy at wafer sort - reduces post-manufacturing calibration effort. |
| Extended temperature range | Rated for −40°C to +125°C operation - qualified for under-hood automotive and industrial control environments. |
| Low dynamic impedance | 0.9 Ω at 1 mA - minimizes output voltage shift during fast-switching load steps in microcontroller peripherals. |
Applications
| Portable Instrumentation | Automotive Sensor Biasing |
|---|---|
|
Use Scenario: Handheld multimeter front-end using 16-bit SAR ADC with internal reference disabled. IC Role / Device Role / Timing Role: Shunt reference providing 3.0 V reference voltage to ADC REF+ pin and analog front-end op-amps. Use Value: Enables ±0.5% full-scale accuracy over battery life and temperature swing without recalibration. |
Use Scenario: Exhaust gas oxygen (EGO) sensor signal conditioning module in engine control unit. IC Role / Device Role / Timing Role: Precision bias source for Wheatstone bridge excitation and cold-junction compensation circuitry. Use Value: Maintains <±10 mV reference stability across −40°C to +125°C ambient, meeting AEC-Q100 Grade 1 requirements. |
| Energy Metering Subsystem | Industrial Process Transmitter |
|
Use Scenario: Three-phase electricity meter with metrology SoC requiring stable 3.0 V reference for current/voltage channel ADCs. IC Role / Device Role / Timing Role: Primary voltage reference shared across multiple ADC channels and calibration DACs. Use Value: Delivers 35 μVRMS noise floor and <100 ppm/°C drift - meets IEC 62053 Class 0.2 accuracy class. |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART modulation capability. IC Role / Device Role / Timing Role: Low-current shunt reference powering analog signal chain while consuming <62 μA quiescent current. Use Value: Allows full functionality within 3.5 mA loop budget while maintaining 0.1% total unadjusted error over 15-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C30IDBZR | 3.0 V, ±0.5% grade, SOT-23-3, but higher 150 ppm/°C tempco and 75 μA min current. | Limited to industrial-temp (−40°C to +85°C) designs; unsuitable for extended-temp automotive use. | Choose when cost sensitivity outweighs thermal performance and extended temperature compliance. |
| MAX6003EUR+T | 3.0 V, ±0.5% grade, SOT-23-3, 75 ppm/°C max tempco, 60 μA min current, but only rated to +85°C. | Not qualified for automotive or extended-temperature industrial deployments. | Select for commercial-grade portable equipment where AEC-Q100 or +125°C operation is unnecessary. |
Compared with TL4050C30IDBZR and MAX6003EUR+T, the LM4040DEM3X-3.0/NOPB offers superior thermal stability (100 ppm/°C vs. ≥75 ppm/°C), extended temperature support (−40°C to +125°C), and lower minimum operating current (62 μA), making it the preferred choice for high-reliability, wide-temperature applications.
Availability
LM4040DEM3X-3.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and industrial process transmitters requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040DEM3X-3.0/NOPB 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 series was engineered for space-constrained, micropower applications demanding high initial accuracy and low thermal drift - targeting portable test equipment, automotive sensors, and industrial measurement systems.
FAQ
What is the maximum operating current for LM4040DEM3X-3.0/NOPB?
The LM4040DEM3X-3.0/NOPB supports a maximum operating current of 15 mA. At this level and 25°C ambient, power dissipation reaches 306 mW in the SOT-23 package. Thermal derating applies above 25°C per the 291.9°C/W junction-to-ambient resistance - exceeding 15 mA risks exceeding the 125°C maximum junction temperature and permanent damage to the LM4040DEM3X-3.0/NOPB.
Does LM4040DEM3X-3.0/NOPB require an external capacitor for stability?
No, the LM4040DEM3X-3.0/NOPB does not require an external output capacitor. Its internal design ensures stability with zero output capacitance and remains stable with capacitive loads up to 10 nF - a key advantage over older shunt references. This eliminates board area and BOM cost associated with stabilization capacitors while simplifying layout for the LM4040DEM3X-3.0/NOPB.
What is the temperature range qualification for LM4040DEM3X-3.0/NOPB?
The LM4040DEM3X-3.0/NOPB is specified for the extended temperature range of −40°C to +125°C. This rating is documented in Section 6.7 of the TI datasheet (SNOS633K) for Grade E devices in SOT-23 package. It meets AEC-Q100 stress test requirements for automotive Grade 1 applications, making it suitable for under-hood and industrial control environments where the LM4040DEM3X-3.0/NOPB must maintain regulation across extreme thermal cycles.
How does the pinout of LM4040DEM3X-3.0/NOPB differ from LM4040AIM3-3.0?
The LM4040DEM3X-3.0/NOPB and LM4040AIM3-3.0 share identical SOT-23-3 (DBZ) pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC. Both require Pin 3 to be left floating or tied to Pin 2. The difference lies solely in grade - LM4040DEM3X-3.0/NOPB is Grade C (±0.5%), while LM4040AIM3-3.0 is Grade A (±0.1%). No PCB layout change is needed when substituting between these grades of the LM4040DEM3X-3.0/NOPB family.
What is the typical wideband noise performance of LM4040DEM3X-3.0/NOPB?
The LM4040DEM3X-3.0/NOPB delivers 35 μVRMS wideband noise over the 10 Hz to 10 kHz bandwidth, as specified in TI's SNOS633K datasheet. This low-noise characteristic is critical for high-resolution data acquisition systems - for example, a 16-bit ADC with 3.0 V full scale has an LSB of ~46 μV, so the LM4040DEM3X-3.0/NOPB noise contributes less than one LSB, preserving effective resolution without additional filtering.
LM4040DEM3X-3.0/NOPB 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 75 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DEM3X-3.0/NOPB FAQ
1.How can I place an order for LM4040DEM3X-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3X-3.0/NOPB 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-3.0/NOPB reliable?
The price and inventory of LM4040DEM3X-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DEM3X-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DEM3X-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3X-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3X-3.0/NOPB?
LM4040DEM3X-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3X-3.0/NOPB 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-3.0/NOPB?
For technical support, including LM4040DEM3X-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3X-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040DEM3X-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3X-3.0/NOPB 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-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DEM3X-3.0/NOPB?
All LM4040DEM3X-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3X-3.0/NOPB, 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-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040DEM3X-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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