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Texas Instruments LM4040DEM3X-2.0/NOPB
- Part No.:
- LM4040DEM3X-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3X-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,304
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Product details
Overview
LM4040DEM3X-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 2.048 V reverse breakdown voltage with ±20 mV (±0.98%) initial tolerance at 25°C, 65 μA minimum operating current, and 150 ppm/°C max temperature coefficient over −40°C to +125°C. It enables accurate ADC/DAC biasing and sensor excitation in space-constrained industrial and automotive systems.
For engineers reviewing the LM4040DEM3X-2.0/NOPB datasheet, LM4040DEM3X-2.0/NOPB pinout, LM4040DEM3X-2.0/NOPB application, or LM4040DEM3X-2.0/NOPB equivalent, this page provides verified electrical specs, thermal behavior, SOT-23 terminal mapping, real-world use cases, and validated alternative parts for design-in and supply continuity planning.
Technical Context
The LM4040DEM3X-2.0/NOPB uses Zener-zap trimmed bandgap architecture with curvature-corrected temperature drift compensation, achieving stable 2.048 V output across wide current (65 μA–15 mA) and temperature (−40°C to +125°C) ranges. Its low 0.9 Ω dynamic impedance and 35 μVrms (10 Hz–10 kHz) noise support high-resolution data acquisition without external capacitors.
Designed for shunt-mode operation, it requires only an anode-to-ground connection and cathode-to-load resistor configuration. The device tolerates capacitive loads and exhibits 0.08% thermal hysteresis after −40°C/125°C cycling-critical for repeatable calibration in test equipment and energy metering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage; enables precise 12-bit ADC full-scale reference with <±20 mV error at 25°C. |
| Initial Tolerance | ±20 mV (±0.98%) at 25°C for Grade D; ensures ≤±30 mV total error over industrial range without trimming. |
| Temp Coefficient | Max 150 ppm/°C over −40°C to +125°C; contributes ≤±15.6 mV drift across full range, supporting automotive under-hood use. |
| Min Operating Current | 65 μA at full temperature range; allows ultra-low-power operation in battery-backed sensors and IoT nodes. |
| Dynamic Impedance | 0.9 Ω typical at 1 mA; maintains <1 mV load regulation shift from 100 μA to 10 mA, simplifying current-source design. |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz); avoids signal corruption in 16-bit SAR ADC front-ends and precision instrumentation. |
| Long-Term Stability | 120 ppm after 1000 hours; supports >10-year calibration validity in medical and industrial monitoring devices. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, 1.0 mm height, gull-wing leads; rated for JEDEC J-STD-020D 260°C peak reflow (30 sec).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / output voltage node | Connects to load resistor and regulated output; sinks all current above minimum; defines reference voltage at this node. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the reference potential for cathode voltage; floating violates operation. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to Pin 2 (anode) per TI specification-no signal routing allowed. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact PCB layouts without stability-compensation components or layout iterations. |
| Tolerates capacitive loads | Supports direct connection to ADC input caps or long traces up to 10 nF without oscillation or settling degradation. |
| Fixed 2.048 V output | Matches standard 12-bit full-scale binary (212 = 4096) scaling; eliminates need for external resistor dividers in digital systems. |
| Extended temperature range | Rated for −40°C to +125°C operation; qualified for automotive engine control modules and industrial motor drives. |
| Low 35 μVrms noise | Preserves ENOB in 16-bit data converters; avoids post-processing filtering that adds latency and component count. |
Applications
| Portable Instrumentation | Automotive Sensor Biasing |
|---|---|
|
Use Scenario: Handheld multimeter front-end requiring stable 2.048 V reference for 12-bit ADC conversion of analog sensor signals. IC Role / Device Role / Timing Role: Shunt voltage reference providing precision excitation and measurement reference point. Use Value: Enables ±0.1% measurement accuracy over battery life and temperature swing without recalibration. |
Use Scenario: Oxygen sensor heater control circuit in exhaust manifold where ambient temperature exceeds 105°C. IC Role / Device Role / Timing Role: Stable voltage reference for current-sense amplifier feedback loop. Use Value: Maintains <±1.5% total error from −40°C cold start to +125°C steady-state, ensuring AFR control integrity. |
| Energy Meter Calibration | Industrial PLC Analog Input |
|
Use Scenario: Revenue-grade electricity meter requiring traceable 2.048 V reference for metrology ADC during 10-year field deployment. IC Role / Device Role / Timing Role: Primary voltage reference for polyphase energy measurement ASIC. Use Value: Delivers 120 ppm long-term stability and 0.08% thermal hysteresis-meeting IEC 62053-21 Class 0.2 requirements. |
Use Scenario: 4–20 mA transmitter module in hazardous-area process controller needing immunity to ESD and board-level noise. IC Role / Device Role / Timing Role: Low-noise, high-PSRR shunt reference for DAC output buffer and current-loop driver. Use Value: 35 μVrms noise and ±2000 V HBM ESD rating ensure robustness in noisy factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C20IDBZR | 2.048 V, ±0.5% initial tolerance, 75 ppm/°C max TC, SOT-23-3; higher min current (75 μA) and lower noise (20 μVrms). | Better accuracy and noise for metrology; not qualified for extended temp range (−40°C to +125°C). | Select when tighter initial tolerance and lower noise outweigh extended temperature needs. |
| MAX6002EUR+T | 2.048 V, ±0.2% initial tolerance, 100 ppm/°C max TC, SOT-23-3; 60 μA min current, but only rated to +85°C. | Superior grade D tolerance match with lower power; lacks automotive/extended-temp qualification. | Choose for industrial control boards operating strictly within −40°C to +85°C ambient. |
Compared with TL4050C20IDBZR and MAX6002EUR+T, LM4040DEM3X-2.0/NOPB uniquely balances extended temperature capability (+125°C), Grade D tolerance (±20 mV), and SOT-23 footprint-making it optimal for automotive and harsh-environment designs where both accuracy and thermal resilience are mandatory.
Availability
LM4040DEM3X-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor biasing, energy meter calibration, and industrial PLC analog input applications requiring stable component supply across extended temperature and long lifecycle deployments.
Supply support for LM4040DEM3X-2.0/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 product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-reliability systems-including automotive, industrial sensing, and portable test equipment.
FAQ
What is the exact reverse breakdown voltage and tolerance of LM4040DEM3X-2.0/NOPB at 25°C?
The LM4040DEM3X-2.0/NOPB has a nominal reverse breakdown voltage of 2.048 V with an initial tolerance of ±20 mV (±0.98%) at 25°C, corresponding to Grade D specification per TI's LM4040-N datasheet revision K. This is confirmed in Section 6.7 Electrical Characteristics for 2-V LM4040-N VR Tolerance Grades C/D/E, Temperature Grade E.
Which package type and pin configuration does LM4040DEM3X-2.0/NOPB use?
LM4040DEM3X-2.0/NOPB uses the SOT-23-3 (DBZ) package with pin 1 as Cathode, pin 2 as Anode, and pin 3 as NC (no-connect). Pin 3 must remain floating or be tied to pin 2 per TI's Pin Functions table in Section 5 of the datasheet.
Does LM4040DEM3X-2.0/NOPB require an external output capacitor for stability?
No, LM4040DEM3X-2.0/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces-eliminating the need for external compensation components.
What is the minimum operating current for LM4040DEM3X-2.0/NOPB across its full temperature range?
The LM4040DEM3X-2.0/NOPB requires a minimum operating current of 65 μA over the full −40°C to +125°C temperature range, as specified in Section 6.7 for LM4040DEM3 under "IRMIN Minimum Operating Current" at TMIN to TMAX.
Is LM4040DEM3X-2.0/NOPB qualified for automotive applications?
Yes, LM4040DEM3X-2.0/NOPB is qualified for automotive use: it is rated for −40°C to +125°C operation (Temperature Grade E), meets AEC-Q100 stress test requirements, and is listed in TI's LM4040-N-Q1 automotive family documentation-though this specific part number carries the /NOPB suffix indicating commercial packaging with automotive-grade silicon.
LM4040DEM3X-2.0/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):
- 2.048V
- 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:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DEM3X-2.0/NOPB FAQ
1.How can I place an order for LM4040DEM3X-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3X-2.0/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-2.0/NOPB reliable?
The price and inventory of LM4040DEM3X-2.0/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-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DEM3X-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3X-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3X-2.0/NOPB?
LM4040DEM3X-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3X-2.0/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-2.0/NOPB?
For technical support, including LM4040DEM3X-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3X-2.0/NOPB requirements.
6.How does Aetrix verify that LM4040DEM3X-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3X-2.0/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-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DEM3X-2.0/NOPB?
All LM4040DEM3X-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3X-2.0/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-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040DEM3X-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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