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Texas Instruments LM4041CEM3-ADJ/NOPB
- Part No.:
- LM4041CEM3-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CEM3-ADJ/NOPB.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,412
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Product details
Overview
LM4041CEM3-ADJ/NOPB from Texas Instruments is a precision adjustable shunt voltage reference in SOT-23 package, delivering 1.233 V nominal reference voltage with ±0.5% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise (10 Hz–10 kHz). It operates from 60 μA to 12 mA over −40°C to +125°C and supports output voltages from 1.24 V to 10 V in battery-powered instrumentation and automotive sensor signal conditioning.
For engineers reviewing the LM4041CEM3-ADJ/NOPB datasheet, LM4041CEM3-ADJ/NOPB pinout, LM4041CEM3-ADJ/NOPB application, or LM4041CEM3-ADJ/NOPB equivalent, key selection criteria include extended-temperature-grade shunt reference stability, no-output-capacitor operation, feedback-pin current ≤100 nA, and compatibility with high-impedance divider networks in low-power ADC biasing and precision current-sense circuits.
Technical Context
The LM4041CEM3-ADJ/NOPB uses a bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling stable reverse breakdown voltage across −40°C to +125°C. Its feedback (FB) pin senses output voltage via external resistor divider, establishing programmable reference voltage without internal op-amp or series pass element.
It features ultra-low dynamic impedance (0.3 Ω typical at 1 mA), tolerates capacitive loads without oscillation, and maintains regulation down to 60 μA-anode-grounded configuration simplifies PCB layout in space-constrained systems where ground-referenced references are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.233 V nominal at 100 μA, VOUT = 5 V - sets precise DC bias point for ADCs, DACs, and comparators |
| Initial Tolerance | ±0.5% at 25°C (C grade) - enables <10 mV absolute error in 2 V–5 V output configurations without trimming |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C - ensures <±1.25 mV drift across full industrial-extended range |
| Operating Current | 60 μA min / 12 mA max - supports micro-power sensor nodes and higher-current analog front-ends |
| Noise (10 Hz–10 kHz) | 20 μVRMS - preserves SNR in 16-bit+ data acquisition systems without external filtering |
| Feedback Current | ≤100 nA at 25°C - minimizes divider network error and power loss in high-R biasing |
| Dynamic Impedance | 0.3 Ω typical at 1 mA - provides fast transient response and stable regulation under load variation |
Pinout & Package
SOT-23 (DBZ) package: 1.30 mm × 2.92 mm body, 3-pin surface-mount, anode-grounded topology requiring no external capacitor.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 3) | Ground reference terminal | Must be connected to system ground; serves as common return for shunt current and FB network |
| Cathode (Pin 2) | Shunt current sink & output node | Connects to regulated output rail; sinks all current not diverted through FB divider |
| FB (Pin 1) | Feedback input | Senses divided output voltage; high-impedance input (≤100 nA) enables >1 MΩ divider resistors |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load up to 10 nF - eliminates BOM cost and board area for stabilization |
| Adjustable output (1.24 V–10 V) | Programmed via external resistor divider on FB pin - replaces multiple fixed-voltage references in multi-rail designs |
| Extended temperature range | −40°C to +125°C operation (Grade C) - qualified for under-hood automotive and industrial control environments |
| Low quiescent current | 60 μA minimum operating current - enables use in always-on battery-backed monitoring circuits |
| Low thermal hysteresis | 0.08% - ensures repeatable voltage after thermal cycling, critical for calibration-critical test equipment |
Applications
| Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Portable multimeter or handheld data logger powered by coin cell or Li-ion battery. IC Role / Device Role / Timing Role: Shunt reference for 16-bit SAR ADC and low-power microcontroller VREF input. Use Value: 60 μA min operating current extends battery life; ±0.5% tolerance and 100 ppm/°C TC ensure measurement accuracy across temperature without recalibration. |
Use Scenario: Engine coolant temperature (ECT) or manifold absolute pressure (MAP) sensor signal conditioning module. IC Role / Device Role / Timing Role: Precision bias source for op-amp gain stages and ADC reference in AEC-Q100 Grade 1 systems. Use Value: −40°C to +125°C operation and automotive qualification enable direct placement near engine bay sensors; low noise preserves signal integrity in millivolt-level sensor outputs. |
| Energy Metering Front-End | Industrial Process Controller Analog I/O |
|
Use Scenario: Residential smart meter measuring voltage, current, and power factor with isolation and metrology-grade accuracy. IC Role / Device Role / Timing Role: Stable reference for isolated sigma-delta ADC and anti-aliasing filter biasing. Use Value: 20 μVRMS noise and <±1.25 mV total drift over temperature maintain Class 0.2 metering accuracy; no capacitor requirement simplifies isolated PCB layout. |
Use Scenario: PLC analog input module converting 4–20 mA or 0–10 V field signals to digital for control logic. IC Role / Device Role / Timing Role: Programmable reference for precision current-to-voltage conversion and ADC scaling. Use Value: Adjustable 1.24–10 V output allows single BOM variant to support multiple input ranges; 0.3 Ω dynamic impedance ensures stable reference under varying channel loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | Fixed 2.495 V reference; requires external resistors for adjustment; 200 ppm/°C tempco (max); 25 μVRMS noise | Not qualified for automotive Grade 1; lacks extended-temp certification; higher noise limits resolution in precision metrology | Choose TL431CDBZR only when fixed 2.5 V output suffices and AEC-Q100 compliance is unnecessary |
| MAX6008AEUR+T | Fixed 1.25 V output; SC70-3 package; 75 ppm/°C tempco; 25 μVRMS noise; 100 μA min current | Non-adjustable; smaller SC70 footprint but incompatible pinout; not automotive-qualified | Use MAX6008AEUR+T where board space is critical and 1.25 V fixed reference meets system requirements |
Compared with TL431CDBZR and MAX6008AEUR+T, LM4041CEM3-ADJ/NOPB uniquely combines AEC-Q100 Grade 1 qualification, adjustable output, sub-100 ppm/°C tempco, and 60 μA minimum current-making it the only option supporting automotive-qualified, low-power, programmable reference needs in a 3-pin SOT-23.
Availability
LM4041CEM3-ADJ/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor modules, energy metering front-ends, and industrial process controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041CEM3-ADJ/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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.
The LM4041-N series delivers precision shunt references optimized for space-constrained, low-power, and high-reliability applications-including automotive sensor interfaces, portable test equipment, and industrial control systems requiring stable voltage references across wide temperature ranges.
FAQ
What is the output voltage range supported by LM4041CEM3-ADJ/NOPB?
The LM4041CEM3-ADJ/NOPB supports an adjustable output voltage range of 1.24 V to 10 V, set by an external resistor divider connected to its FB pin. At VOUT = 5 V, the internal reference voltage is 1.233 V with ±0.5% initial tolerance. The device maintains regulation across this full range while drawing only 60 μA minimum current, making it suitable for both low-voltage microcontroller references and higher-voltage analog signal chains.
Does LM4041CEM3-ADJ/NOPB require an external output capacitor?
No, LM4041CEM3-ADJ/NOPB does not require an external output capacitor. Its internal design provides inherent stability with any capacitive load up to at least 10 nF, eliminating the need for external stabilization components. This simplifies layout, reduces BOM count, and improves reliability-especially in space-constrained applications like portable instrumentation and automotive ECUs where board real estate is limited.
What is the maximum operating temperature range for LM4041CEM3-ADJ/NOPB?
The LM4041CEM3-ADJ/NOPB is rated for operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 automotive qualification. This extended temperature range is confirmed in the device's Electrical Characteristics table (Section 5.7 and 5.9 of the datasheet) for the C-grade variant, ensuring stable performance in under-hood automotive environments and harsh industrial settings without derating.
How does the feedback (FB) pin function in LM4041CEM3-ADJ/NOPB?
The FB pin of LM4041CEM3-ADJ/NOPB senses the divided output voltage via an external resistor network. It draws ≤100 nA at 25°C, enabling high-impedance dividers that minimize power loss and loading error. The internal circuitry regulates the cathode voltage so that the voltage at FB equals the 1.233 V internal reference, thereby setting VOUT = 1.233 V × (1 + R1/R2). This architecture allows precise, programmable reference generation without op-amps or additional active components.
Is LM4041CEM3-ADJ/NOPB pin-compatible with other LM4041 variants?
Yes, LM4041CEM3-ADJ/NOPB shares the same SOT-23 (DBZ) package and pinout as all LM4041-N and LM4041-N-Q1 variants in the M3 suffix, including fixed-voltage versions. Pin 1 is FB, Pin 2 is Cathode, and Pin 3 is Anode-identical across ADJ and 1.225 V variants. This allows drop-in replacement in existing layouts when switching between adjustable and fixed reference requirements, provided the external resistor network is added or removed accordingly.
LM4041CEM3-ADJ/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:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.233V
- Voltage - Output (Max):
- 10 V
- Current - Output:
- 12 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 68 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CEM3-ADJ/NOPB FAQ
1.How can I place an order for LM4041CEM3-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CEM3-ADJ/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 LM4041CEM3-ADJ/NOPB reliable?
The price and inventory of LM4041CEM3-ADJ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CEM3-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041CEM3-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CEM3-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CEM3-ADJ/NOPB?
LM4041CEM3-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CEM3-ADJ/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 LM4041CEM3-ADJ/NOPB?
For technical support, including LM4041CEM3-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CEM3-ADJ/NOPB requirements.
6.How does Aetrix verify that LM4041CEM3-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041CEM3-ADJ/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 LM4041CEM3-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041CEM3-ADJ/NOPB?
All LM4041CEM3-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CEM3-ADJ/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 LM4041CEM3-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM4041CEM3-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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