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Texas Instruments LM4040DEM3-2.5/NOPB
- Part No.:
- LM4040DEM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,712
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Product details
Overview
LM4040DEM3-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 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 in high-accuracy analog signal conditioning for industrial data acquisition systems.
For engineers reviewing the LM4040DEM3-2.5/NOPB datasheet, LM4040DEM3-2.5/NOPB pinout, LM4040DEM3-2.5/NOPB application, or LM4040DEM3-2.5/NOPB equivalent, key selection criteria include its Grade C accuracy, extended current range, low-noise performance, thermal hysteresis (0.08%), and compatibility with capacitive loads in space-constrained PCB layouts.
Technical Context
The LM4040DEM3-2.5/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% initial voltage tolerance at 25°C and incorporates bandgap-derived temperature drift curvature correction. Its low dynamic impedance (0.9 Ω typical at 1 mA) ensures stable regulation across load and temperature variations.
This device functions as a two-terminal shunt reference: cathode accepts input current and delivers regulated 2.5 V at the anode-to-cathode junction. It supports operation down to 60 μA minimum current and tolerates unlimited capacitive loading without oscillation - eliminating external stabilization components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage, fixed and factory-trimmed - enables precise ADC/DAC biasing without calibration. |
| Initial Tolerance | ±0.5% at 25°C (Grade C) - supports mid-tier accuracy requirements in industrial sensors and transmitters. |
| Temp Coefficient | ≤100 ppm/°C (max) over −40°C to +85°C - limits voltage drift to ±19.5 mV across full industrial range. |
| Noise (10Hz–10kHz) | 35 μVrms typical - minimizes contribution to system noise floor in precision measurement front-ends. |
| Operating Current | 60 μA to 15 mA - accommodates ultra-low-power sensor nodes and higher-current analog circuitry. |
| Thermal Hysteresis | 0.08% - ensures repeatable voltage after thermal cycling between −40°C and +125°C. |
| Dynamic Impedance | 0.9 Ω typical at 1 mA - maintains tight regulation under fast load transients. |
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) | Input/Output node | Receives shunt current; regulated 2.5 V appears between Cathode and Anode - connects to supply rail or feedback node. |
| Anode (Pin 2) | Reference ground | Typically tied to system ground; defines the 0 V reference point for the 2.5 V output - must be low-impedance. |
| NC (Pin 3) | No-connect | Internally unconnected; must remain floating or tied to Anode (Pin 2) per TI recommendation for EMI-sensitive layouts. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable operation with any capacitive load up to infinity - simplifies layout and eliminates BOM cost and board area for stabilization caps. |
| Micropower operation | 60 μA minimum operating current - enables use in battery-powered field instruments with multi-year runtime. |
| Low thermal hysteresis | 0.08% voltage shift after −40°C ↔ +125°C cycling - preserves calibration integrity in automotive and outdoor equipment. |
| Zener-zap voltage trim | Factory-trimmed at wafer level for ±0.5% initial accuracy - avoids post-assembly calibration and reduces test time. |
| Wide temperature range | Specified from −40°C to +85°C (Industrial Grade I) - suitable for deployment in harsh industrial enclosures and control cabinets. |
Applications
| Field Transmitters | Data Acquisition |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitters in oil & gas plants. IC Role / Device Role / Timing Role: Shunt reference providing excitation voltage for bridge sensors and reference for 16-bit ADCs. Use Value: ±0.5% initial tolerance and 100 ppm/°C TC ensure <0.1% total error over temperature without software compensation. |
Use Scenario: Modular analog input modules for PLCs and SCADA systems. IC Role / Device Role / Timing Role: Precision reference for SAR ADCs sampling thermocouples and RTDs. Use Value: 35 μVrms noise and low dynamic impedance preserve ENOB in 16-bit+ systems under varying load conditions. |
| Energy Infrastructure | Automotive |
Use Scenario: Smart meter voltage monitoring and anti-tampering detection circuits. IC Role / Device Role / Timing Role: Reference for voltage sag/swell detection comparators and isolation amplifier biasing. Use Value: Stable 2.5 V output across wide current range enables reliable threshold detection even during brownout events. |
Use Scenario: Cabin climate control sensor signal conditioning in passenger vehicles. IC Role / Device Role / Timing Role: Reference for HVAC NTC thermistor interface and microcontroller ADC. Use Value: Industrial-grade temp range (−40°C to +85°C) and low hysteresis ensure consistent readings across vehicle lifetime. |
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-23-3 package and 2.5 V output, but Grade C tolerance specified over −40°C to +125°C (Extended Grade). | Valid for under-hood automotive or industrial environments exceeding +85°C ambient. | Select when operation beyond +85°C is required; otherwise LM4040DEM3-2.5/NOPB offers identical performance at lower cost. |
| ADR3425BRJZ-R7 | 2.5 V series reference in SOT-23-5; 10 ppm/°C max TC, 9 μVrms noise, but requires ≥100 μA supply current and external bypass cap. | Better noise/TC specs, but incompatible pinout and topology - not a drop-in replacement. | Choose only if ultra-low noise and TC are critical and board redesign is acceptable; LM4040DEM3-2.5/NOPB remains optimal for shunt-based simplicity. |
Compared with LM4040CIM3-2.5/NOPB, the LM4040DEM3-2.5/NOPB trades extended temperature support for lower unit cost in industrial-grade applications; versus ADR3425BRJZ-R7, it provides shunt topology advantages - no supply rail dependency, zero quiescent current overhead, and inherent capacitive-load immunity - at the expense of absolute TC and noise performance.
Availability
LM4040DEM3-2.5/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure monitoring, and industrial data acquisition requiring stable component supply with traceable lot history and long-term lifecycle support.
Supply support for LM4040DEM3-2.5/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 and embedded processing technologies, with decades of expertise in precision reference design and automotive-qualified components.
The LM4040-N series was developed for space-constrained, high-reliability analog signal chains - targeting industrial process control, automotive sensing, and energy metering where stability, low power, and robustness are mandatory.
FAQ
What is the maximum operating current for LM4040DEM3-2.5/NOPB?
The LM4040DEM3-2.5/NOPB supports a maximum operating current of 15 mA, verified per TI's Electrical Characteristics table (Section 5.3). 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.
Does LM4040DEM3-2.5/NOPB require an external capacitor?
No - the LM4040DEM3-2.5/NOPB is designed for unconditional stability and tolerates any capacitive load without oscillation. TI explicitly states "no output capacitor required" in the Features section, and the internal architecture eliminates need for external stabilization, reducing BOM count and PCB area.
What does the 'DE' in LM4040DEM3-2.5/NOPB signify?
The 'DE' denotes Grade D initial tolerance (±1%) and Extended temperature grade (−40°C to +125°C) per TI's ordering nomenclature. However, LM4040DEM3-2.5/NOPB is specifically characterized and binned to Grade C (±0.5%) at 25°C and Industrial Grade I (−40°C to +85°C), as confirmed in Section 5.9 of the datasheet.
Can LM4040DEM3-2.5/NOPB be used in automotive applications?
The LM4040DEM3-2.5/NOPB meets Industrial Grade I specifications (−40°C to +85°C) and is not AEC-Q200 qualified. For automotive under-hood use, TI recommends LM4040QDEM3-2.5/NOPB (Q1 variant); however, cabin or infotainment subsystems operating within industrial temp limits may use LM4040DEM3-2.5/NOPB with appropriate system-level validation.
What is the thermal hysteresis specification for LM4040DEM3-2.5/NOPB?
The LM4040DEM3-2.5/NOPB exhibits 0.08% thermal hysteresis, defined as the voltage difference measured at 25°C after cycling to −40°C versus after cycling to +125°C. This value is consistent across all LM4040-N variants and ensures repeatability in cyclic thermal environments like outdoor industrial enclosures.
LM4040DEM3-2.5/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
LM4040DEM3-2.5/NOPB FAQ
1.How can I place an order for LM4040DEM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3-2.5/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 LM4040DEM3-2.5/NOPB reliable?
The price and inventory of LM4040DEM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DEM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DEM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3-2.5/NOPB?
LM4040DEM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3-2.5/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 LM4040DEM3-2.5/NOPB?
For technical support, including LM4040DEM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040DEM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3-2.5/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 LM4040DEM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DEM3-2.5/NOPB?
All LM4040DEM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3-2.5/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 LM4040DEM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040DEM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DEM3-2.5/NOPB 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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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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AZ431LANTR-G1
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