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Texas Instruments LM4040QDEM3-3.0/NOPB
- Part No.:
- LM4040QDEM3-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QDEM3-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,003
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Product details
Overview
LM4040QDEM3-3.0/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified precision micropower shunt voltage reference with 3.0 V nominal reverse breakdown voltage, ±0.2% initial tolerance (Grade B), 100 ppm/°C max temperature coefficient, and stable operation from −40°C to +125°C. It delivers low 35 μVRMS noise (10 Hz–10 kHz) and supports 62 μA to 15 mA operating current - ideal for high-accuracy analog sensing in automotive engine control units.
For engineers reviewing the LM4040QDEM3-3.0/NOPB datasheet, LM4040QDEM3-3.0/NOPB pinout, LM4040QDEM3-3.0/NOPB application, or LM4040QDEM3-3.0/NOPB equivalent, this page provides verified package mapping (SOT-23-3), terminal functions, thermal derating guidance, automotive-grade reliability data, and validated alternative options for voltage reference selection in safety-critical embedded systems.
Technical Context
The LM4040QDEM3-3.0/NOPB implements a trimmed Zener-based shunt architecture with bandgap curvature correction for flat temperature drift. Its fuse-and-Zener-zap wafer-level trimming ensures ±0.2% output accuracy at 25°C and maintains stability across capacitive loads without external compensation.
Designed for automotive Grade 1 operation, it sustains full specification compliance from −40°C to +125°C ambient, with dynamic impedance ≤0.8 Ω at 1 mA and thermal hysteresis limited to 0.08% - enabling repeatable precision in cyclic thermal environments such as under-hood sensor modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 3.0 V reverse breakdown - fixed output for 3.3 V rail monitoring and ADC reference scaling |
| Initial Tolerance | ±0.2% at 25°C (Grade B) - enables <10 mV absolute error in 3.0 V reference path without calibration |
| Temp Coefficient | ≤100 ppm/°C - contributes ≤±30 mV drift over −40°C to +125°C operating range |
| Operating Current | 62 μA to 15 mA - supports ultra-low-power sensor biasing and high-current DAC reference buffering |
| Output Noise | 35 μVRMS (10 Hz–10 kHz) - suitable for 16-bit+ data acquisition without added filtering |
| Dynamic Impedance | ≤0.8 Ω at 1 mA - minimizes load-induced voltage shift in varying current-sink applications |
| Thermal Hysteresis | 0.08% - ensures <2.4 mV repeatability after thermal cycling between −40°C and +125°C |
Pinout & Package
LM4040QDEM3-3.0/NOPB uses the DBZ (SOT-23-3) package: 2.92 mm × 1.30 mm body, 0.95 mm height, gull-wing leads, JEDEC MO-178AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current input and output voltage node - connects to regulated rail; sinks all load + reference current |
| Anode (Pin 2) | O | Ground reference terminal - must be connected to system ground; defines cathode-to-anode voltage |
| NC (Pin 3) | - | No-connect terminal - left floating or tied to anode per EMI mitigation guidance in high-noise automotive environments |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with lifetime reliability testing - meets automotive powertrain and chassis requirements |
| No external capacitor required | Internally compensated design eliminates need for stabilization cap - reduces BOM count and PCB area in space-constrained ECUs |
| Tolerates capacitive loads | Stable into ≥1 μF capacitance - supports direct connection to ADC input caps or LDO bypass networks without oscillation risk |
| Low 35 μVRMS wideband noise | Enables high-resolution measurement without post-filtering - critical for precision current sensing and battery monitoring |
| 62 μA minimum operating current | Permits use in nanoamp-biased sensor front-ends while maintaining regulation - extends battery life in always-on modules |
Applications
| Automotive Engine Control Unit | Industrial Analog Input Module |
|---|---|
Use Scenario: Monitoring throttle position, coolant temperature, and manifold pressure via ratiometric sensors fed by microcontroller ADCs. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.0 V excitation and ADC reference voltage for 12–16 bit conversions. Use Value: Maintains ±0.2% accuracy across −40°C to +125°C engine bay temperatures, eliminating recalibration during thermal transients. |
Use Scenario: Signal conditioning for 4–20 mA loop-powered field transmitters in PLC I/O cards. IC Role / Device Role / Timing Role: Precision 3.0 V reference for DAC output scaling and sensor signal offset correction. Use Value: Low 35 μVRMS noise ensures <0.01% measurement uncertainty in 16-bit industrial DAQ systems. |
| Energy Infrastructure Metering | Medical Patient Monitor Sensor Interface |
Use Scenario: High-accuracy voltage and current sampling in smart electricity meters with anti-tampering diagnostics. IC Role / Device Role / Timing Role: Primary shunt reference for metrology-grade sigma-delta ADCs measuring grid parameters. Use Value: 100 ppm/°C tempco and 0.08% thermal hysteresis ensure long-term calibration stability over 10+ year field deployment. |
Use Scenario: Biopotential signal acquisition (ECG, EEG) requiring ultra-low-noise analog front-end biasing. IC Role / Device Role / Timing Role: Clean 3.0 V reference for op-amp gain stages and ADC reference in isolated patient-side circuits. Use Value: 35 μVRMS noise floor prevents degradation of microvolt-level biological signals during digitization. |
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% initial tolerance, 75 ppm/°C max tempco, SOT-23-3, non-automotive qualified | Lacks AEC-Q100 Grade 1 rating; rated only for −40°C to +125°C with reduced long-term stability specs | Select when automotive qualification is unnecessary and ±0.5% tolerance is acceptable for cost-sensitive industrial designs |
| MAX6003EUR+T | 3.0 V, ±0.2% initial tolerance, 100 ppm/°C max tempco, SOT-23-3, AEC-Q100 Grade 3 (−40°C to +85°C) | Lower temperature grade limits use in under-hood or powertrain locations; higher 50 μVRMS noise | Select for cabin electronics or infotainment where extended temperature range is not required and TI supply continuity is preferred |
Compared with TL4050C30IDBZR and MAX6003EUR+T, the LM4040QDEM3-3.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, ±0.2% tolerance, and 35 μVRMS noise - making it the only option qualified for precision analog sensing in engine control, transmission, and braking systems.
Availability
LM4040QDEM3-3.0/NOPB is available at Aetrix Electronics and suitable for automotive engine control units, industrial analog input modules, and energy infrastructure metering requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4040QDEM3-3.0/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 and embedded processing technologies, with decades of experience delivering high-reliability components for automotive, industrial, and medical markets.
The LM4040-N/Q1 product line delivers precision shunt references optimized for space-constrained, high-stability applications - particularly where AEC-Q100 qualification, low noise, and wide temperature operation are mandatory.
FAQ
What is the maximum operating current for LM4040QDEM3-3.0/NOPB?
The LM4040QDEM3-3.0/NOPB supports a maximum operating current of 15 mA across its full temperature range. This limit is defined in the Absolute Maximum Ratings table and applies regardless of ambient temperature. Exceeding 15 mA risks permanent damage due to junction overheating, especially in the SOT-23-3 (DBZ) package, which has a 306 mW power dissipation limit at 25°C ambient.
Does LM4040QDEM3-3.0/NOPB require an external capacitor for stability?
No, the LM4040QDEM3-3.0/NOPB does not require an external capacitor for stability. Its internal design eliminates the need for output capacitance, and it remains stable even with capacitive loads up to at least 1 μF - a key advantage over older shunt references that mandate minimum output capacitance to prevent oscillation.
What is the meaning of the 'Q' and 'E' suffixes in LM4040QDEM3-3.0/NOPB?
In LM4040QDEM3-3.0/NOPB, 'Q' denotes AEC-Q100 qualification, and 'E' specifies Extended Temperature Grade (−40°C to +125°C). The 'D' indicates 3.0 V nominal voltage, 'M3' identifies the SOT-23-3 (DBZ) package, and '/NOPB' confirms lead-free, RoHS-compliant finish - fully documented in TI's official orderable addendum.
How does thermal hysteresis affect LM4040QDEM3-3.0/NOPB performance in automotive cycling?
LM4040QDEM3-3.0/NOPB exhibits 0.08% thermal hysteresis - equivalent to ±2.4 mV at 3.0 V - measured after cycling between −40°C and +125°C. This ensures repeatable voltage output upon return to 25°C, critical for applications like emission control sensors where calibration integrity must survive repeated thermal stress without drift accumulation.
Can LM4040QDEM3-3.0/NOPB be used in series with other references or regulators?
No, LM4040QDEM3-3.0/NOPB is a two-terminal shunt device and must be connected in parallel with its load - not in series. It operates by sinking excess current to maintain a fixed cathode-to-anode voltage. Series connection would prevent proper biasing and violate its fundamental shunt topology, leading to loss of regulation or device failure.
LM4040QDEM3-3.0/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:
- ±1%
- 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
LM4040QDEM3-3.0/NOPB FAQ
1.How can I place an order for LM4040QDEM3-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QDEM3-3.0/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 LM4040QDEM3-3.0/NOPB reliable?
The price and inventory of LM4040QDEM3-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QDEM3-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QDEM3-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QDEM3-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QDEM3-3.0/NOPB?
LM4040QDEM3-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QDEM3-3.0/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 LM4040QDEM3-3.0/NOPB?
For technical support, including LM4040QDEM3-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QDEM3-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040QDEM3-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QDEM3-3.0/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 LM4040QDEM3-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QDEM3-3.0/NOPB?
All LM4040QDEM3-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QDEM3-3.0/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 LM4040QDEM3-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040QDEM3-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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