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Texas Instruments LM4040QEEM3-3.0/NOPB
- Part No.:
- LM4040QEEM3-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QEEM3-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,464
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Product details
Overview
LM4040QEEM3-3.0/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 3.0 V reverse breakdown voltage with ±0.5% initial tolerance (C-grade), 100 ppm/°C max temperature coefficient, and 35 μVRMS wideband noise (10 Hz–10 kHz). It operates from −40°C to +125°C with 62 μA minimum cathode current and supports stable regulation without output capacitor across capacitive loads - ideal for automotive sensor signal conditioning.
For engineers reviewing the LM4040QEEM3-3.0/NOPB datasheet, LM4040QEEM3-3.0/NOPB pinout, LM4040QEEM3-3.0/NOPB application, or LM4040QEEM3-3.0/NOPB equivalent, key selection criteria include its extended-temperature automotive qualification, low-noise shunt topology, tight initial accuracy at 3.0 V, and compatibility with high-EMI environments via floating or anode-connected NC pin.
Technical Context
The LM4040QEEM3-3.0/NOPB implements a Zener-zap trimmed bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation. Its design eliminates external stabilization capacitors while maintaining stability under all capacitive load conditions, enabled by low dynamic impedance (≤0.9 Ω at 1 mA) and controlled junction capacitance.
This device operates as a two-terminal shunt regulator: cathode serves as both current sink and output node, anode is grounded, and the NC pin (Pin 3 in SOT-23) must be left floating or tied to anode for EMI mitigation. It is specified for 62 μA to 15 mA operating current across −40°C to +125°C, with thermal hysteresis of ≤0.08% after −40°C/125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and factory-trimmed - sets precise bias/reference point for ADCs, transmitters, and analog front-ends. |
| Initial Tolerance | ±0.5% at 25°C (C-grade) - ensures ≤±15 mV absolute error before temperature or aging effects. |
| Temp Coefficient | ≤100 ppm/°C (max) over −40°C to +125°C - limits drift to ≤±30 mV across full automotive grade range. |
| Noise (10Hz–10kHz) | 35 μVRMS - enables high-resolution data acquisition without added filtering overhead. |
| Min Operating Current | 62 μA - allows ultra-low-power operation in battery-backed or energy-harvesting systems. |
| Dynamic Impedance | ≤0.9 Ω at 1 mA - maintains tight regulation under varying load currents and supply ripple. |
| Thermal Hysteresis | ≤0.08% - guarantees repeatability after thermal cycling, critical for field-deployed automotive modules. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178AA compliant. Anode (Pin 2) connects to ground; Cathode (Pin 1) carries shunt current and delivers regulated 3.0 V reference; Pin 3 is no-connect (NC), recommended floating or tied to anode in high-EMI layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Accepts external current source; voltage at this pin is regulated 3.0 V - used to bias op-amps, ADC references, or sensor excitation circuits. |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; establishes return path for shunt current and defines 0 V reference for output voltage. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; TI recommends leaving floating or tying to Pin 2 (anode) in noisy environments to reduce EMI susceptibility. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from −40°C to +125°C ambient, supporting engine control, ADAS sensors, and powertrain modules. |
| No output capacitor required | Stable operation with any capacitive load up to 10 nF - reduces BOM count and PCB area in space-constrained modules. |
| Zener-zap voltage trim | Factory-laser-trimmed reverse breakdown voltage ensures ±0.5% initial accuracy without post-assembly calibration. |
| Low dynamic impedance | ≤0.9 Ω at 1 mA enables <1 mV load regulation error across 62 μA–15 mA operating range - critical for precision analog sensing. |
| Bandgap temperature curvature correction | Compensates non-linear VBE drift, achieving ≤100 ppm/°C tempco over full industrial and automotive temperature ranges. |
Applications
| Automotive Sensor Signal Conditioning | Industrial Field Transmitter |
|---|---|
Use Scenario: High-accuracy temperature, pressure, and position sensors in engine control units require stable excitation and reference under wide thermal and EMI stress. IC Role / Device Role / Timing Role: Shunt reference providing 3.0 V bias for bridge sensors and 3.0 V reference for 16-bit SAR ADCs. Use Value: Grade 1 qualification and ≤0.08% thermal hysteresis ensure repeatable measurements after cold-start and hot-soak cycles. |
Use Scenario: 4–20 mA loop-powered transmitters in oil & gas or process automation demand low-quiescent, high-stability references. IC Role / Device Role / Timing Role: Precision 3.0 V shunt reference for DAC output scaling and sensor front-end gain-setting resistors. Use Value: 62 μA min operating current enables operation below 100 μA total loop budget; no capacitor simplifies layout in explosion-proof housings. |
| Energy Infrastructure Monitoring | Audio/Video Analog Front-End |
Use Scenario: Smart meters and grid-edge inverters require metrology-grade voltage references for AC line monitoring and harmonic analysis. IC Role / Device Role / Timing Role: Low-noise 3.0 V reference for anti-aliasing filter biasing and ADC reference in isolated measurement channels. Use Value: 35 μVRMS noise floor supports >90 dB SNR in 24-bit delta-sigma converters without additional filtering. |
Use Scenario: Automotive infotainment head units and professional audio interfaces need clean analog references for DACs and microphone preamps. IC Role / Device Role / Timing Role: Stable 3.0 V shunt reference for headphone amplifier biasing and CODEC reference voltage generation. Use Value: EMI-hardened NC pin routing and low dynamic impedance suppress switching noise from nearby DC/DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C30IDBZR | 3.0 V, ±0.5%, SOT-23, 100 ppm/°C max, but not AEC-Q100 qualified; higher 75 μVRMS noise. | Lacks automotive qualification and thermal hysteresis spec; suitable for industrial-grade metering only. | Select when AEC-Q100 compliance is unnecessary and cost sensitivity outweighs noise performance. |
| MAX6003EUR+T | 3.0 V, ±0.5%, SOT-23, 75 ppm/°C max, AEC-Q100 Grade 3 (−40°C to +85°C), 25 μVRMS noise. | Lower tempco and noise, but limited to Grade 3 - insufficient for under-hood or transmission control applications. | Choose for cabin electronics or non-critical automotive subsystems where extended temperature is not required. |
Compared with TL4050C30IDBZR and MAX6003EUR+T, the LM4040QEEM3-3.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 35 μVRMS noise, and proven EMI resilience via configurable NC pin - making it the only option validated for harsh under-hood signal conditioning.
Availability
LM4040QEEM3-3.0/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, industrial field transmitters, and energy infrastructure monitoring systems requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040QEEM3-3.0/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 specializing in analog, embedded processing, and power management ICs, with deep expertise in precision analog design and automotive qualification.
The LM4040-N/Q1 product line delivers micropower shunt references optimized for space-constrained, high-reliability applications including automotive sensors, industrial transmitters, and portable instrumentation - emphasizing accuracy, stability, and EMI robustness.
FAQ
What is the maximum operating current for LM4040QEEM3-3.0/NOPB?
The LM4040QEEM3-3.0/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 above that temperature per its 291.9°C/W junction-to-ambient thermal resistance.
Is LM4040QEEM3-3.0/NOPB pin-compatible with other LM4040 variants in SOT-23?
Yes, LM4040QEEM3-3.0/NOPB uses the standard DBZ SOT-23 footprint with identical pinout (Cathode–Anode–NC) as all LM4040-N/Q1 SOT-23 variants. However, electrical differences - such as Grade 1 qualification, 3.0 V output, and C-grade tolerance - require validation in the target circuit before substitution.
Does LM4040QEEM3-3.0/NOPB require an output capacitor for stability?
No, LM4040QEEM3-3.0/NOPB does not require an output capacitor. Its internal design provides inherent stability with any capacitive load up to 10 nF, eliminating the need for external compensation components and reducing design complexity in compact layouts.
What is the purpose of the NC pin on LM4040QEEM3-3.0/NOPB?
The NC pin (Pin 3) on LM4040QEEM3-3.0/NOPB is internally unconnected. Texas Instruments recommends leaving it floating or connecting it to the anode (Pin 2) in high-EMI environments - such as near switching regulators or ignition systems - to improve noise immunity without affecting regulation performance.
How does the thermal hysteresis specification impact system accuracy in automotive applications?
The LM4040QEEM3-3.0/NOPB's thermal hysteresis of ≤0.08% means voltage deviation after cycling between −40°C and +125°C is capped at ±2.4 mV (0.08% of 3.0 V). This ensures repeatable sensor calibration and ADC reference stability across vehicle life cycles, directly supporting ASIL-B functional safety requirements in critical subsystems.
LM4040QEEM3-3.0/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:
- ±2%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 75 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040QEEM3-3.0/NOPB FAQ
1.How can I place an order for LM4040QEEM3-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QEEM3-3.0/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 LM4040QEEM3-3.0/NOPB reliable?
The price and inventory of LM4040QEEM3-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QEEM3-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QEEM3-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QEEM3-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QEEM3-3.0/NOPB?
LM4040QEEM3-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QEEM3-3.0/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 LM4040QEEM3-3.0/NOPB?
For technical support, including LM4040QEEM3-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QEEM3-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040QEEM3-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QEEM3-3.0/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 LM4040QEEM3-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QEEM3-3.0/NOPB?
All LM4040QEEM3-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QEEM3-3.0/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 LM4040QEEM3-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040QEEM3-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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