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Texas Instruments LM4040QCEM3-2.5/NOPB
- Part No.:
- LM4040QCEM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QCEM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,913
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Product details
Overview
LM4040QCEM3-2.5/NOPB from Texas Instruments is an AEC-Q100 Grade 3 qualified precision micropower shunt voltage reference with 2.5 V nominal reverse breakdown voltage, ±0.5% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and stable operation from 60 μA to 15 mA over −40°C to +85°C. It serves as a compact, capacitor-free voltage reference in automotive sensor signal conditioning circuits.
For engineers reviewing the LM4040QCEM3-2.5/NOPB datasheet, LM4040QCEM3-2.5/NOPB pinout, LM4040QCEM3-2.5/NOPB application, or LM4040QCEM3-2.5/NOPB equivalent, key selection criteria include its SOT-23 package compatibility, low 35 μVrms noise (10 Hz–10 kHz), absence of required output capacitance, and guaranteed performance across industrial temperature range without external stabilization.
Technical Context
The LM4040QCEM3-2.5/NOPB implements a trimmed Zener-based shunt reference architecture with bandgap curvature correction for flat temperature drift. Its design eliminates need for output capacitors while maintaining stability under capacitive loads up to 10 nF.
It operates as a two-terminal device: cathode sinks current to establish precise 2.5 V across external load/resistor, with anode grounded. Minimum operating current is 60 μA at 25°C, rising to 65 μA across full −40°C to +85°C range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage, fixed and non-adjustable |
| Initial Tolerance | ±0.5% at 25°C (Grade C), enabling 12.5 mV absolute accuracy in calibration-critical systems |
| Temp Coefficient | ≤100 ppm/°C max, limiting worst-case drift to ±19 mV over −40°C to +85°C |
| Operating Current | 60 μA to 15 mA range supports ultra-low-power and high-current reference applications |
| Output Noise | 35 μVrms (10 Hz–10 kHz), suitable for high-resolution ADC biasing and precision analog front-ends |
| Thermal Hysteresis | 0.08% max, ensuring repeatable voltage after thermal cycling between −40°C and +125°C |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, body size 2.92 mm × 1.30 mm, rated for 306 mW power dissipation at 25°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Current sink / output node | Connects to supply rail via series resistor; voltage develops across external load referenced to ground |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; defines 0 V reference for shunt regulation |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to anode per EMI mitigation guidance |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free operation | Stable without output capacitor, reducing BOM count and PCB area in space-constrained designs |
| Capacitive load tolerance | Remains stable with up to 10 nF load capacitance, simplifying interface with ADC input filters or op-amp buffers |
| AEC-Q100 Grade 3 qualification | Validated for automotive applications requiring −40°C to +85°C operation and robust reliability |
| Low quiescent current | 60 μA minimum operating current enables use in battery-powered field transmitters and IoT sensors |
| Zener-zap voltage trim | Fuse-based wafer-level trimming ensures ±0.5% initial accuracy without post-package adjustment |
Applications
| Automotive Cabin Sensors | Industrial Analog Input Modules |
|---|---|
Use Scenario: Temperature and pressure sensing in HVAC control units with CAN bus reporting. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V bias for ratiometric bridge sensor excitation and ADC reference. Use Value: Enables <12-bit effective resolution despite wide ambient temperature swings due to ≤100 ppm/°C drift and low thermal hysteresis. |
Use Scenario: 4–20 mA loop-powered transmitter interfacing with RTD and thermocouple inputs. IC Role / Device Role / Timing Role: Precision voltage reference for sigma-delta ADC reference and DAC feedback path. Use Value: Delivers 35 μVrms noise floor and no-output-capacitor simplicity, reducing layout sensitivity in noisy factory environments. |
| Energy Infrastructure Meters | Medical Diagnostic Signal Chains |
Use Scenario: Polyphase electricity metering with anti-tampering features and Class 0.5 accuracy compliance. IC Role / Device Role / Timing Role: Reference source for metrology-grade ADCs measuring voltage/current waveforms. Use Value: Maintains ±0.5% initial tolerance and long-term stability (120 ppm ΔVR after 1000 hrs) critical for revenue-grade meter calibration. |
Use Scenario: Portable ECG and EEG front-end modules requiring low-noise, low-power analog signal conditioning. IC Role / Device Role / Timing Role: Stable 2.5 V reference for instrumentation amplifier gain-setting and ADC conversion reference. Use Value: Supports battery life >72 hours via 60 μA min operating current while preserving signal integrity with 35 μVrms noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C25IDBZR | Same 2.5 V output and ±0.5% grade, but higher 150 ppm/°C tempco and 50 μVrms noise | Less suitable for high-accuracy data acquisition where drift and noise dominate error budget | Prefer LM4040QCEM3-2.5/NOPB when <100 ppm/°C tempco and <40 μVrms noise are required |
| MAX6008AEUR+T | 2.5 V output, ±0.2% initial tolerance, but only rated for −40°C to +85°C industrial grade (no AEC-Q100) | Not qualified for automotive use; lacks extended reliability validation and automotive PPAP support | Select LM4040QCEM3-2.5/NOPB for automotive Tier-1 designs requiring AEC-Q100 Grade 3 compliance |
Compared with TL4050C25IDBZR and MAX6008AEUR+T, the LM4040QCEM3-2.5/NOPB uniquely combines AEC-Q100 Grade 3 qualification, 100 ppm/°C max tempco, and 35 μVrms noise in a cost-optimized SOT-23 package-making it the preferred choice for automotive and industrial precision analog systems demanding both reliability and parametric performance.
Availability
LM4040QCEM3-2.5/NOPB is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial analog input modules, energy infrastructure meters, and medical diagnostic signal chains requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4040QCEM3-2.5/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-qualified components.
The LM4040-N/Q1 product line delivers micropower shunt references optimized for space-constrained, high-reliability applications including automotive sensing, industrial process control, and portable instrumentation-prioritizing low drift, low noise, and qualification rigor.
FAQ
What is the maximum operating current for LM4040QCEM3-2.5/NOPB?
The LM4040QCEM3-2.5/NOPB supports a maximum operating current of 15 mA across its full temperature range. This limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient, with appropriate derating applied at elevated temperatures per its 291.9°C/W junction-to-ambient thermal resistance.
Does LM4040QCEM3-2.5/NOPB require an output capacitor for stability?
No, the LM4040QCEM3-2.5/NOPB does not require an output capacitor for stability. Its internal design maintains regulation stability even with capacitive loads up to 10 nF, eliminating the need for external compensation and simplifying layout in compact PCB designs.
Is LM4040QCEM3-2.5/NOPB qualified for automotive applications?
Yes, LM4040QCEM3-2.5/NOPB is AEC-Q100 qualified for automotive applications under Grade 3 (−40°C to +85°C). It meets stress testing requirements for temperature cycling, humidity, and ESD (±2000 V HBM), making it suitable for cabin and chassis-sensing systems in passenger vehicles.
What is the typical output voltage noise of LM4040QCEM3-2.5/NOPB?
The LM4040QCEM3-2.5/NOPB exhibits 35 μVrms wideband noise over the 10 Hz to 10 kHz frequency range, measured at 100 μA operating current. This low noise performance supports high-resolution data acquisition systems where reference noise directly impacts effective ADC resolution.
How does the LM4040QCEM3-2.5/NOPB achieve its ±0.5% initial voltage tolerance?
The LM4040QCEM3-2.5/NOPB achieves ±0.5% initial tolerance via fuse-based Zener-zap trimming during wafer sort. This laser-trimmed process adjusts the reverse breakdown voltage at the die level before packaging, ensuring tight distribution without post-assembly calibration or external components.
LM4040QCEM3-2.5/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:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 68 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040QCEM3-2.5/NOPB FAQ
1.How can I place an order for LM4040QCEM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QCEM3-2.5/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 LM4040QCEM3-2.5/NOPB reliable?
The price and inventory of LM4040QCEM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QCEM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QCEM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QCEM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QCEM3-2.5/NOPB?
LM4040QCEM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QCEM3-2.5/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 LM4040QCEM3-2.5/NOPB?
For technical support, including LM4040QCEM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QCEM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040QCEM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QCEM3-2.5/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 LM4040QCEM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QCEM3-2.5/NOPB?
All LM4040QCEM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QCEM3-2.5/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 LM4040QCEM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040QCEM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040QCEM3-2.5/NOPB Tags
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