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Texas Instruments LM4040QCEM3-3.0/NOPB
- Part No.:
- LM4040QCEM3-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QCEM3-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:700
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Product details
Overview
LM4040QCEM3-3.0/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified precision micropower shunt voltage reference with 3.0 V nominal reverse breakdown voltage, ±0.5% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and stable operation from −40°C to +125°C. It delivers 35 μVrms wideband noise (10 Hz–10 kHz) and supports 62 μA to 15 mA operating current in SOT-23 package for automotive sensor biasing and high-accuracy ADC/DAC references.
For engineers reviewing the LM4040QCEM3-3.0/NOPB datasheet, LM4040QCEM3-3.0/NOPB pinout, LM4040QCEM3-3.0/NOPB application, or LM4040QCEM3-3.0/NOPB equivalent, key selection criteria include automotive-grade temperature range compliance, shunt reference stability under capacitive loads, low-noise performance in space-constrained layouts, and compatibility with fixed-voltage precision analog signal chains.
Technical Context
The LM4040QCEM3-3.0/NOPB implements a Zener-zap trimmed bandgap-shunt architecture with curvature-corrected temperature drift compensation, enabling tight output voltage accuracy across industrial and extended automotive temperature ranges. Its fuse-trimmed wafer-sort process ensures ±0.5% initial tolerance without post-package calibration.
It operates as a two-terminal shunt device requiring only an external current-limiting resistor, tolerates unlimited capacitive loading, and eliminates need for output stabilization capacitors-unlike series references-while maintaining <0.8 mV load regulation (62 μA–1 mA) and <6 mV regulation (1–15 mA) over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, verified at 100 μA test current |
| Initial Tolerance | ±0.5% at 25°C (Grade C), equivalent to ±15 mV absolute error |
| Temp Coefficient | ≤100 ppm/°C max (−40°C to +125°C), limiting drift to ±30 mV over full range |
| Operating Current | 62 μA min to 15 mA max-supports ultra-low-power sensor bias and high-current reference buffering |
| Output Noise | 35 μVrms (10 Hz–10 kHz), critical for high-resolution data acquisition systems |
| Dynamic Impedance | 0.3–0.9 Ω typical at 1 mA, ensuring minimal voltage shift under dynamic load transients |
| Thermal Hysteresis | 0.08% max (−40°C ↔ +125°C cycling), preserving calibration integrity in thermal-cycling environments |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body, 1.0 mm max height, JEDEC MO-178 compliant. Anode grounded, cathode supplies reference voltage via shunt current path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Shunt current input / reference output node | Connects to regulated voltage rail; sinks all operating current; defines VREF = 3.0 V relative to anode |
| 2 (Anode) | Reference ground reference | Must be connected to system ground or lowest potential node; forms return path for shunt current |
| 3 (NC) | No-connect terminal | Internally unconnected; must remain floating or tied to pin 2 per TI EMI mitigation guidance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from −40°C to +125°C ambient, supporting engine control and ADAS sensor modules |
| No output capacitor required | Enables direct integration into compact PCB layouts without stability-compromising external components |
| Capacitive load tolerance | Stable with any value of output capacitance-eliminates risk of oscillation in noisy power domains |
| Zener-zap voltage trim | Ensures ±0.5% initial accuracy without post-packaging calibration, reducing test cost and time |
| Low 35 μVrms noise | Minimizes quantization uncertainty in 16-bit+ SAR ADCs and precision instrumentation amplifiers |
Applications
| Automotive Sensor Biasing | Industrial Data Acquisition |
|---|---|
Use Scenario: Providing stable excitation voltage to RTD, thermistor, and bridge-based pressure sensors in engine control units. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise 3.0 V bias point independent of supply variation. Use Value: Enables <±0.1% measurement accuracy over −40°C to +125°C, meeting ASIL-B functional safety requirements. | Use Scenario: Supplying reference voltage to 16-bit delta-sigma ADCs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Low-noise, temperature-stable shunt reference minimizing integral nonlinearity (INL) errors. Use Value: 35 μVrms noise and 100 ppm/°C TC ensure <0.0015% full-scale error across operating temperature range. |
| Energy Infrastructure Monitoring | Audio/Video Signal Conditioning |
Use Scenario: Calibrating voltage and current sensing in solar inverter DC-link monitoring circuits. IC Role / Device Role / Timing Role: Precision shunt reference for isolated amplifier feedback paths and fault-detection comparators. Use Value: Thermal hysteresis ≤0.08% prevents calibration drift after repeated thermal cycling in outdoor enclosures. | Use Scenario: Setting DC offset and gain reference points in professional audio ADC/DAC front-ends. IC Role / Device Role / Timing Role: Low-noise 3.0 V reference for op-amp bias networks and PGA calibration. Use Value: 0.3–0.9 Ω dynamic impedance maintains reference stability during fast transient audio signal peaks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040QCIM3-3.0/NOPB | Same SOT-23 package and 3.0 V output, but Grade C (±0.5%) vs. Grade C (±0.5%) - identical spec; differs only in marking and reel packaging | No functional difference; both qualified for automotive Grade 1; same thermal and electrical behavior | Select LM4040QCEM3-3.0/NOPB for tape-and-reel delivery with E-marking; LM4040QCIM3-3.0/NOPB for standard I-marking |
| MAX6003EUR+T | 3.0 V shunt reference with ±0.2% initial tolerance, 75 ppm/°C TC, 20 μVrms noise, but only rated to +85°C (industrial grade) | Lacks AEC-Q100 qualification and extended temperature support; unsuitable for under-hood automotive use | Choose MAX6003EUR+T only for cost-sensitive industrial systems where −40°C to +85°C suffices and tighter initial tolerance is prioritized |
Compared with LM4040QCIM3-3.0/NOPB, LM4040QCEM3-3.0/NOPB offers identical electrical performance with E-marking for traceability in automotive production; versus MAX6003EUR+T, it trades 0.3% tighter initial tolerance for guaranteed −40°C to +125°C operation and automotive qualification-critical for safety-critical biasing.
Availability
LM4040QCEM3-3.0/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, energy infrastructure monitoring systems, and professional audio signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for LM4040QCEM3-3.0/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 delivering analog and embedded processing solutions, with over 50 years of precision reference design heritage and AEC-Q100-compliant manufacturing.
The LM4040-N/Q1 product line targets high-accuracy, space-constrained analog systems in automotive, industrial, and energy sectors-designed specifically for shunt-based voltage regulation where board area, thermal stability, and qualification rigor are paramount.
FAQ
What is the maximum operating temperature range for LM4040QCEM3-3.0/NOPB?
The LM4040QCEM3-3.0/NOPB is AEC-Q100 Grade 1 qualified and operates from −40°C to +125°C ambient temperature. This extended range is validated per automotive stress testing protocols and enables use in engine compartments, transmission control units, and other high-temperature under-hood locations where standard industrial references fail.
Does LM4040QCEM3-3.0/NOPB require an external output capacitor?
No, LM4040QCEM3-3.0/NOPB does not require an external output capacitor. Its internal architecture provides inherent stability across all capacitive loads, eliminating the need for external compensation components-a key advantage over series references and simplifying layout in space-constrained designs.
What is the minimum operating current for LM4040QCEM3-3.0/NOPB at 3.0 V output?
The LM4040QCEM3-3.0/NOPB requires a minimum operating current of 62 μA at 25°C, increasing slightly to 68 μA across the full −40°C to +125°C range. This ultra-low quiescent current enables use in battery-powered automotive sensors and always-on monitoring circuits.
How does the pin configuration of LM4040QCEM3-3.0/NOPB differ from standard 3-pin SOT-23 devices?
LM4040QCEM3-3.0/NOPB uses a 3-pin SOT-23 (DBZ) package with pin 1 = Cathode, pin 2 = Anode, and pin 3 = NC (no-connect). Unlike active ICs, its pin 3 is unconnected internally and must remain floating or tied to pin 2 per TI's EMI mitigation guidance-ensuring robustness in high-noise automotive environments.
Is LM4040QCEM3-3.0/NOPB compatible with lead-free reflow processes?
Yes, LM4040QCEM3-3.0/NOPB is RoHS-compliant and qualified for standard lead-free reflow profiles, including peak temperatures up to 260°C. Its SOT-23 package meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/85% RH without dry-pack requirements.
LM4040QCEM3-3.0/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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- 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:
- 70 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040QCEM3-3.0/NOPB FAQ
1.How can I place an order for LM4040QCEM3-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QCEM3-3.0/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 LM4040QCEM3-3.0/NOPB reliable?
The price and inventory of LM4040QCEM3-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QCEM3-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QCEM3-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QCEM3-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QCEM3-3.0/NOPB?
LM4040QCEM3-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QCEM3-3.0/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 LM4040QCEM3-3.0/NOPB?
For technical support, including LM4040QCEM3-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QCEM3-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040QCEM3-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QCEM3-3.0/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 LM4040QCEM3-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QCEM3-3.0/NOPB?
All LM4040QCEM3-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QCEM3-3.0/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 LM4040QCEM3-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040QCEM3-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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