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Texas Instruments LM4040DEM3X-2.5/NOPB
- Part No.:
- LM4040DEM3X-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3X-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,220
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Product details
Overview
LM4040DEM3X-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.5 V reverse breakdown voltage with ±0.5% initial tolerance (Grade C), 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to +85°C and requires no output capacitor - used for ADC/DAC biasing, sensor excitation, and field transmitter calibration.
For engineers reviewing the LM4040DEM3X-2.5/NOPB datasheet, LM4040DEM3X-2.5/NOPB pinout, LM4040DEM3X-2.5/NOPB application, or LM4040DEM3X-2.5/NOPB equivalent, key selection criteria include industrial-grade temperature range, low dynamic impedance (0.9 Ω typ), capacitive-load stability, and AEC-Q100 Grade 3 qualification for automotive subsystems.
Technical Context
The LM4040DEM3X-2.5/NOPB implements a Zener-zap trimmed bandgap-assisted shunt reference architecture with curvature-corrected temperature drift compensation. Its design eliminates external stabilization capacitors while maintaining stability under capacitive loads up to several nF.
It features fuse-based wafer-sort trimming for ±0.5% initial accuracy at 25°C (C grade), supports operation down to 60 μA minimum current, and maintains <±29 mV total voltage tolerance across −40°C to +85°C due to its 100 ppm/°C max tempco and load regulation of ≤8 mV over 1–15 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage - sets precise bias point for analog signal chains and data converters. |
| Initial Tolerance | ±0.5% at 25°C (Grade C) - enables high-accuracy calibration without post-manufacture trimming. |
| Tempco | ≤100 ppm/°C - ensures voltage drift stays within ±19 mV over −40°C to +85°C operating range. |
| Noise (10 Hz–10 kHz) | 35 μVrms - minimizes added uncertainty in high-resolution (≥16-bit) measurement systems. |
| Operating Current Range | 60 μA to 15 mA - supports ultra-low-power sensor nodes and robust industrial current-sink configurations. |
| Dynamic Impedance | 0.9 Ω typical at 1 mA - provides tight load regulation and immunity to supply ripple coupling. |
| Thermal Hysteresis | 0.08% - guarantees repeatable voltage after thermal cycling, critical for field-deployed instrumentation. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178AA compliant. Thermal resistance RθJA = 291.9°C/W (board-mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current input and output voltage node - connects to regulated rail; sinks all excess current from series resistor. |
| Anode (Pin 2) | O | Ground reference terminal - must be connected to system ground; defines cathode-to-ground voltage. |
| NC (Pin 3) | - | No-connect terminal - left floating or tied to anode per EMI mitigation guidance; not internally bonded in SOT-23 variant. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables space-constrained PCB layouts and eliminates capacitor aging/sourcing dependencies. |
| Stable with capacitive loads | Supports direct connection to ADC input caps or long traces without oscillation risk. |
| Zener-zap voltage trim | Ensures ±0.5% initial accuracy without laser trimming, improving production yield and cost control. |
| AEC-Q100 Grade 3 qualified | Validated for automotive applications operating from −40°C to +85°C ambient. |
| Low 60 μA minimum current | Permits use in battery-powered field transmitters with multi-year runtime requirements. |
Applications
| Field Transmitter Calibration | Data Acquisition Reference |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter requiring stable excitation and ADC reference under varying ambient conditions. IC Role / Device Role / Timing Role: Shunt reference providing 2.5 V bias for bridge sensor excitation and SAR ADC reference input. Use Value: Maintains ≤±29 mV total error over −40°C to +85°C, enabling <0.1% full-scale accuracy without recalibration. | Use Scenario: Industrial PLC analog input module digitizing 0–10 V sensor signals with 16-bit resolution. IC Role / Device Role / Timing Role: Precision voltage reference for successive-approximation ADC reference buffer stage. Use Value: 35 μVrms noise and 0.9 Ω dynamic impedance limit quantization uncertainty to <0.5 LSB. |
| Automotive Cabin Sensor Node | Analog Input Module |
Use Scenario: Occupancy detection system using thermopile and humidity sensors in vehicle cabin, powered from 5 V rail. IC Role / Device Role / Timing Role: Low-current shunt reference supplying stable 2.5 V to sensor signal conditioning and microcontroller ADC. Use Value: 60 μA minimum operating current extends battery backup life; AEC-Q100 Grade 3 ensures reliability in automotive thermal environments. | Use Scenario: Modular I/O system with hot-swappable analog input cards handling multiple sensor types. IC Role / Device Role / Timing Role: Isolated reference source for each channel's signal chain, decoupled from shared power rails. Use Value: No-output-capacitor operation simplifies layout across card edges; NC pin grounding option reduces EMI susceptibility in dense backplane 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 |
|---|---|---|---|
| LM4040CIM3-2.5/NOPB | Same SOT-23 package and 2.5 V output, but Grade C with identical ±0.5% tolerance and 100 ppm/°C tempco - differs only in marking and reel packaging. | No functional difference; both rated for −40°C to +85°C industrial operation and AEC-Q100 Grade 3. | Select LM4040DEM3X-2.5/NOPB for tape-and-reel delivery optimized for automated SMT assembly; LM4040CIM3-2.5/NOPB for tube packaging or legacy BOM alignment. |
| MAX6008AEUR+T | 2.5 V shunt reference in SOT-23, ±0.2% initial accuracy (A grade), 75 ppm/°C max tempco, 20 μVrms noise - tighter specs but higher minimum current (80 μA). | Better noise and tempco, but less suitable for ultra-low-power (<80 μA) applications like energy-harvesting sensors. | Choose MAX6008AEUR+T when sub-20 μV noise and <±15 mV total drift are mandatory; LM4040DEM3X-2.5/NOPB remains optimal for cost-sensitive, wide-current-range industrial designs. |
Compared with LM4040CIM3-2.5/NOPB, LM4040DEM3X-2.5/NOPB offers identical electrical performance with optimized tape-and-reel packaging for high-volume SMT; versus MAX6008AEUR+T, it trades 15 μVrms noise reduction and 25 ppm/°C tempco improvement for 20 μA lower minimum current and broader current-range flexibility.
Availability
LM4040DEM3X-2.5/NOPB is available at Aetrix Electronics and suitable for field transmitters, data acquisition systems, and automotive cabin sensor nodes requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LM4040DEM3X-2.5/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, embedded processing, and digital signal technologies, with decades of expertise in precision reference design.
The LM4040-N product line delivers micropower shunt references for space-constrained, high-accuracy applications including industrial instrumentation, automotive sensing, and portable measurement equipment.
FAQ
What is the maximum operating temperature range for the LM4040DEM3X-2.5/NOPB?
The LM4040DEM3X-2.5/NOPB is specified for industrial operation from −40°C to +85°C (Temperature Grade I). It is also AEC-Q100 Grade 3 qualified, confirming suitability for automotive subsystems within this same ambient range. The device's 100 ppm/°C max temperature coefficient ensures total voltage variation remains within ±29 mV across this interval.
Does the LM4040DEM3X-2.5/NOPB require an external output capacitor?
No, the LM4040DEM3X-2.5/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. This eliminates capacitor-related failures and saves board space - a key advantage over older shunt references.
What is the minimum cathode current needed for regulation in the LM4040DEM3X-2.5/NOPB?
The LM4040DEM3X-2.5/NOPB requires a minimum cathode current of 60 μA at 25°C to maintain regulation. Over the full −40°C to +85°C range, the minimum increases to 65 μA. This ultra-low requirement enables use in battery-powered field instruments where quiescent current directly impacts operational lifetime.
How does the LM4040DEM3X-2.5/NOPB achieve its ±0.5% initial voltage tolerance?
The LM4040DEM3X-2.5/NOPB achieves ±0.5% initial tolerance via Zener-zap trimming during wafer sort - a fuse-based process that adjusts the breakdown voltage before packaging. This method avoids laser trimming, improving manufacturing yield and consistency while meeting Grade C specification without post-assembly calibration.
Is the LM4040DEM3X-2.5/NOPB pin-compatible with other LM4040 variants in SOT-23?
Yes, the LM4040DEM3X-2.5/NOPB uses the standard 3-pin SOT-23 (DBZ) footprint and pinout: Cathode (Pin 1), Anode (Pin 2), and NC (Pin 3). It is mechanically and electrically compatible with all other LM4040-xM3 variants (e.g., LM4040AIM3-2.5/NOPB), allowing drop-in replacement where Grade C tolerance is acceptable.
LM4040DEM3X-2.5/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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- 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-2.5/NOPB FAQ
1.How can I place an order for LM4040DEM3X-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3X-2.5/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-2.5/NOPB reliable?
The price and inventory of LM4040DEM3X-2.5/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-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DEM3X-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3X-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3X-2.5/NOPB?
LM4040DEM3X-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3X-2.5/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-2.5/NOPB?
For technical support, including LM4040DEM3X-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3X-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040DEM3X-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3X-2.5/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-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DEM3X-2.5/NOPB?
All LM4040DEM3X-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3X-2.5/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-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040DEM3X-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DEM3X-2.5/NOPB Tags
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