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Texas Instruments LM4040EEM3-2.5/NOPB
- Part No.:
- LM4040EEM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040EEM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,122
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Product details
Overview
LM4040EEM3-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 2.5 V reverse breakdown voltage with ±50 mV (±2.0%) initial tolerance at 25°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.
For engineers reviewing the LM4040EEM3-2.5/NOPB datasheet, LM4040EEM3-2.5/NOPB pinout, LM4040EEM3-2.5/NOPB application, or LM4040EEM3-2.5/NOPB equivalent, this device serves as a stable, low-noise, space-efficient reference for analog signal conditioning, data acquisition front-ends, and automotive sensor interfaces where tight voltage accuracy and thermal stability are critical.
Technical Context
The LM4040EEM3-2.5/NOPB uses Zener-zap trimming during wafer sort to achieve its ±2.0% initial voltage tolerance. Its bandgap-corrected temperature drift curvature ensures stable output across industrial temperature range (−40°C to +85°C) without external compensation.
Designed as a two-terminal shunt reference, it sinks current through the cathode while maintaining regulated voltage between cathode and anode. It tolerates capacitive loads and exhibits low dynamic impedance (≤1.1 Ω at 1 mA), enabling stable operation in high-PSRR analog supply rails and ADC reference buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage - sets precise bias point for ADCs, DACs, and comparators. |
| Initial Tolerance | ±50 mV (±2.0%) at 25°C - defines worst-case offset before thermal or load effects. |
| Temp Coefficient | ≤100 ppm/°C - limits voltage drift to ±250 μV/°C over full operating range. |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and high-current reference buffers. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - enables high-resolution (<16-bit) analog measurements without added filtering. |
| Dynamic Impedance | ≤1.1 Ω at 1 mA - minimizes load-induced voltage variation in varying current-sink applications. |
| Thermal Hysteresis | 0.08% - ensures repeatability after thermal cycling between −40°C and +125°C. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178AC compliant. Anode grounded, cathode supplies regulated voltage, and pin 3 is NC (no connect) but may be tied to anode for EMI mitigation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / output node | Regulated 2.5 V appears here relative to anode; sinks all reference current. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground or low-impedance return path; defines voltage reference point. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; TI recommends floating or tying to anode in high-EMI environments. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables direct integration into space-constrained PCB layouts without stability-compensation components. |
| Capacitive load tolerance | Stable with any value of output capacitance - simplifies filtering and decoupling design for noisy rails. |
| Micropower operation | 60 μA minimum operating current - supports battery-powered field transmitters and IoT edge sensors. |
| Industrial temperature range | Rated for −40°C to +85°C operation - suitable for factory automation, energy metering, and automotive cabin modules. |
| Zener-zap voltage trim | Ensures production-grade accuracy without post-package calibration - reduces test time and BOM cost. |
Applications
| Field Transmitters | Data Acquisition |
|---|---|
Use Scenario: 4–20 mA loop-powered sensor transmitter in oil & gas monitoring. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V excitation for RTD/bridge sensors and ADC reference for digitizing analog outputs. Use Value: Maintains ±0.1% measurement linearity over temperature due to low 100 ppm/°C drift and 35 μVrms noise. |
Use Scenario: Isolated 16-bit analog input module for PLC backplanes. IC Role / Device Role / Timing Role: Precision reference for SAR ADC and programmable gain amplifier biasing. Use Value: Enables <1 LSB error contribution across −40°C to +85°C, verified by ±50 mV initial tolerance and thermal hysteresis ≤0.08%. |
| Analog Input Module | Automotive |
Use Scenario: DIN-rail mounted industrial I/O card with multiple voltage/current inputs. IC Role / Device Role / Timing Role: Shared reference for multi-channel instrumentation amplifiers and anti-aliasing filters. Use Value: Low dynamic impedance (≤1.1 Ω) prevents crosstalk-induced gain error when channels switch simultaneously. |
Use Scenario: Cabin temperature/humidity sensor node in AEC-Q100 Grade 3 qualified vehicle platform. IC Role / Device Role / Timing Role: Voltage reference for microcontroller ADC and sensor signal conditioning ASIC. Use Value: Qualified per AEC-Q100 Grade 3 (−40°C to +85°C), supporting automotive qualification without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040DIM3-2.5/NOPB | ±1.0% initial tolerance (±25 mV), same SOT-23 package and 100 ppm/°C tempco | Better accuracy than LM4040EEM3-2.5/NOPB but less stringent than A-grade; suited for mid-tier industrial systems | Select when ±1% tolerance meets system budget and cost sensitivity outweighs need for tighter grading |
| TL431CDBVR | Adjustable 2.495 V reference, higher 100 μA min current, 2% initial tolerance, SO-8 package | Requires external resistor network for 2.5 V setting; not drop-in; higher quiescent current impacts battery life | Choose only if adjustable output or higher sink current (>100 mA) is required; not a functional replacement for fixed 2.5 V shunt use |
Compared with LM4040EEM3-2.5/NOPB, LM4040DIM3-2.5/NOPB offers improved initial accuracy at lower cost, while TL431CDBVR trades fixed-voltage simplicity for configurability and higher power demand-neither is pin-compatible, but both serve overlapping analog reference roles in cost- or flexibility-driven designs.
Availability
LM4040EEM3-2.5/NOPB is available at Aetrix Electronics and suitable for field transmitters, data acquisition systems, and automotive cabin electronics requiring stable component supply with guaranteed long-term sourcing and AEC-Q100 compliance support.
Supply support for LM4040EEM3-2.5/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-stability analog signal chains in industrial and automotive applications-emphasizing micropower operation, low noise, and robust thermal performance without external components.
FAQ
What is the maximum operating current for LM4040EEM3-2.5/NOPB?
The LM4040EEM3-2.5/NOPB supports a maximum operating current of 15 mA. 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, especially above 85°C ambient.
Does LM4040EEM3-2.5/NOPB require an external capacitor for stability?
No, the LM4040EEM3-2.5/NOPB does not require an external output capacitor. Its internal design provides inherent stability across all capacitive loads, including ceramic, tantalum, and electrolytic types-eliminating layout constraints and reducing bill-of-materials count in compact designs.
What is the temperature range specification for LM4040EEM3-2.5/NOPB?
The LM4040EEM3-2.5/NOPB is specified for the industrial temperature range of −40°C to +85°C (Grade I). It is not rated for extended automotive Grade 1 (−40°C to +125°C); for that, the LM4040EEQ1M3-2.5/NOPB variant must be used.
How does the 100 ppm/°C temperature coefficient affect LM4040EEM3-2.5/NOPB accuracy?
A 100 ppm/°C coefficient means the LM4040EEM3-2.5/NOPB output voltage can drift up to ±250 μV/°C from its 2.5 V nominal value. Over the full −40°C to +85°C range (ΔT = 125°C), worst-case drift is ±31.25 mV-added to the ±50 mV initial tolerance for total system error budgeting.
Is LM4040EEM3-2.5/NOPB AEC-Q100 qualified?
No, LM4040EEM3-2.5/NOPB is not AEC-Q100 qualified. It belongs to the standard LM4040-N family. For automotive use, the LM4040EEQ1M3-2.5/NOPB variant is AEC-Q100 Grade 3 qualified (−40°C to +85°C), with identical electrical specs and SOT-23 packaging.
LM4040EEM3-2.5/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:
- ±2%
- 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
LM4040EEM3-2.5/NOPB FAQ
1.How can I place an order for LM4040EEM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040EEM3-2.5/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 LM4040EEM3-2.5/NOPB reliable?
The price and inventory of LM4040EEM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040EEM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040EEM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040EEM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040EEM3-2.5/NOPB?
LM4040EEM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040EEM3-2.5/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 LM4040EEM3-2.5/NOPB?
For technical support, including LM4040EEM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040EEM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040EEM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040EEM3-2.5/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 LM4040EEM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040EEM3-2.5/NOPB?
All LM4040EEM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040EEM3-2.5/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 LM4040EEM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040EEM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040EEM3-2.5/NOPB Tags
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