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Texas Instruments LM4041CEM3-ADJ-TI
- Part No.:
- LM4041CEM3-ADJ-TI
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CEM3-ADJ-TI.pdf
- Description:
- TWO TERMINAL VOLTAGE REFERENCE,
- Quantity:
- Payment:
- Shipping:
Inventory:11,593
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Product details
Overview
LM4041CEM3-ADJ-TI from Texas Instruments is a precision micropower adjustable shunt voltage reference in SOT-23-3 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 enables compact, stable voltage regulation in space-constrained analog signal chains.
For engineers reviewing the LM4041CEM3-ADJ-TI datasheet, LM4041CEM3-ADJ-TI pinout, LM4041CEM3-ADJ-TI application, or LM4041CEM3-ADJ-TI equivalent, key selection criteria include its extended-temperature-grade C-tolerance performance, no-output-capacitor requirement, feedback-pin-based adjustability, and compatibility with capacitive loads in battery-powered instrumentation and automotive sensor interfaces.
Technical Context
The LM4041CEM3-ADJ-TI uses bandgap reference architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±0.5% initial accuracy. Its three-terminal shunt topology requires only an external resistor divider on the FB pin to set output voltage between 1.24 V and 10 V.
It features low dynamic impedance (0.3 Ω typical at 1 mA), stable operation without output capacitance, and guaranteed performance across −40°C to +125°C ambient-validated per AEC-Q100 Grade 1 for automotive applications. Feedback current is ultra-low (≤120 nA), minimizing divider error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.233 V nominal at 100 μA, enabling precise adjustable outputs from 1.24 V to 10 V via external resistors |
| Initial Tolerance | ±0.5% at 25°C (C grade), ensuring tight system-level calibration without post-manufacture trimming |
| Temp Coefficient | Max 100 ppm/°C over −40°C to +125°C, limiting drift to ±12.5 mV across full range for 1.25 V reference |
| Operating Current | 60 μA min to 12 mA max, supporting ultra-low-power sensor biasing and high-current DAC references |
| Noise (10 Hz–10 kHz) | 20 μVrms, suitable for 16-bit+ data acquisition systems where reference noise dominates SNR |
| Dynamic Impedance | 0.3 Ω typical at 1 mA, providing fast transient response and minimal load-induced voltage shift |
| Long-Term Stability | 120 ppm after 1000 hrs, critical for field-deployed equipment requiring decade-level calibration integrity |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body size) with gull-wing leads; thermally optimized for PCB mounting with 291.9°C/W junction-to-ambient resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 3) | Ground reference node | Must be connected to system ground; serves as common return for shunt current and feedback network |
| Cathode (Pin 2) | Shunt output terminal | Delivers regulated voltage; sinks all load and reference current-requires series resistor from supply |
| FB (Pin 1) | Adjustable feedback input | High-impedance node (≤120 nA) that sets output voltage via resistor divider; determines VOUT = VREF × (1 + R1/R2) |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct connection to ADC/DAC reference inputs without stability-compromising bypass caps-reduces BOM count and board area |
| Tolerates capacitive loads | Stable with ≥100 nF load capacitance, eliminating need for isolation resistors in noisy environments |
| Extended temperature range | Specified from −40°C to +125°C ambient, qualified to AEC-Q100 Grade 1 for under-hood automotive use |
| Low quiescent current | 60 μA minimum operating current allows operation from microamp-level energy harvesters or coin cells |
| Trimmed accuracy | Fuse and Zener-zap wafer sort ensures ±0.5% initial tolerance without post-package calibration |
Applications
| Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter or handheld gas analyzer requiring stable reference for 16-bit SAR ADC over varying battery voltage and temperature. IC Role / Device Role / Timing Role: Shunt reference providing precise 2.5 V or 4.096 V reference to ADC, powered directly from 3.3 V rail via series resistor. Use Value: 20 μVrms noise and 100 ppm/°C drift ensure <0.01% measurement error across −20°C to +60°C operating range. | Use Scenario: Engine coolant temperature sensor interface in powertrain control module, operating continuously at 125°C ambient. IC Role / Device Role / Timing Role: Adjustable shunt reference generating 3.3 V for ratiometric RTD bridge excitation and ADC reference in harsh thermal environment. Use Value: AEC-Q100 Grade 1 qualification and guaranteed −40°C to +125°C operation eliminate derating concerns and enable single-source design reuse. |
| Industrial Process Transmitters | Precision Audio DC Biasing |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART modulation, requiring low-power, high-stability reference for DAC and sensor front-end. IC Role / Device Role / Timing Role: Micropower shunt reference supplying 1.25 V to sigma-delta ADC and 2.5 V to DAC, drawing <100 μA total. Use Value: 60 μA minimum current and 120 ppm long-term stability support 10-year field calibration intervals without drift-related recalibration. | Use Scenario: High-fidelity audio codec in portable speaker system, needing ultra-low-noise DC bias for Class-AB op-amps and ADCs. IC Role / Device Role / Timing Role: Low-noise shunt reference generating clean 3.3 V bias for analog audio stages, isolated from noisy digital supplies. Use Value: 20 μVrms noise floor and absence of switching artifacts preserve >110 dB SNR in 24-bit audio paths. |
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; higher 1 mA min cathode current; 50 ppm/°C tempco; SOT-23-3 | Not adjustable; unsuitable for variable-output or sub-2.4 V designs; better for high-current (>1 mA) regulator feedback | Select when fixed 2.5 V output and higher drive capability are needed-avoid for adjustable or micropower use cases |
| MAX6008AEUR+T | Fixed 1.25 V output; 15 ppm/°C max tempco; 35 μA max quiescent; SOT-23-3 | Lower noise (12 μVrms) but non-adjustable; tighter tempco but limited output range; not AEC-Q100 qualified | Choose for ultra-low-drift fixed-reference needs in medical or test equipment-reject for automotive or adjustable-voltage applications |
Compared with TL431CDBZR and MAX6008AEUR+T, LM4041CEM3-ADJ-TI uniquely combines adjustable output (1.24–10 V), micropower operation (60 μA), AEC-Q100 Grade 1 qualification, and 20 μVrms noise-making it optimal for space-constrained, temperature-extreme, and precision-adjustable reference roles.
Availability
LM4041CEM3-ADJ-TI is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4041CEM3-ADJ-TI 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 connectivity technologies, with decades of leadership in precision reference design.
The LM4041-N family was engineered for space-critical, micropower applications demanding high initial accuracy, low drift, and robust capacitive-load stability-targeting portable instrumentation, automotive sensors, and industrial control systems.
FAQ
What is the minimum operating current for LM4041CEM3-ADJ-TI?
The LM4041CEM3-ADJ-TI requires a minimum operating current of 60 μA at 25°C, increasing to 68 μA over the full −40°C to +125°C extended temperature range. This ultra-low threshold enables reliable operation from energy-harvesting sources or deeply discharged batteries while maintaining ±0.5% output accuracy and 100 ppm/°C temperature coefficient performance.
How do I configure LM4041CEM3-ADJ-TI for a 5.0 V output?
To set LM4041CEM3-ADJ-TI to 5.0 V, connect a resistor divider between Cathode (Pin 2) and Anode (Pin 3), with the FB pin (Pin 1) tied to the divider midpoint. Using VREF = 1.233 V, select R1 = 3.05 kΩ and R2 = 1.00 kΩ (standard 1% values), yielding VOUT = 1.233 × (1 + 3.05/1.00) ≈ 5.00 V. Ensure total divider current remains <100 nA to avoid loading error.
Is LM4041CEM3-ADJ-TI qualified for automotive applications?
Yes, LM4041CEM3-ADJ-TI is AEC-Q100 Grade 1 qualified, rated for −40°C to +125°C ambient operation and validated for automotive use including engine control, transmission, and body electronics. Its SOT-23-3 package, 100 ppm/°C tempco, and 120 ppm long-term stability meet stringent automotive reliability requirements without derating.
Does LM4041CEM3-ADJ-TI require an output capacitor for stability?
No, LM4041CEM3-ADJ-TI does not require an output capacitor for stability-its internal design eliminates the need for external compensation. It remains stable with any capacitive load up to at least 100 nF, simplifying layout and reducing component count in noise-sensitive applications like precision ADC references.
What is the maximum output voltage achievable with LM4041CEM3-ADJ-TI?
The LM4041CEM3-ADJ-TI supports adjustable output voltages from 1.24 V to 10 V, as specified in the datasheet for the ADJ variant. At 10 V output, the device maintains its ±0.5% initial tolerance and 100 ppm/°C temperature coefficient, provided the cathode current stays within the 60 μA–12 mA operating range and power dissipation remains below 306 mW (SOT-23 package, 25°C).
LM4041CEM3-ADJ-TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- 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:
- 200µVrms
- 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-TI FAQ
1.How can I place an order for LM4041CEM3-ADJ-TI through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CEM3-ADJ-TI 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-TI reliable?
The price and inventory of LM4041CEM3-ADJ-TI 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-TI is usually 5 days.
3.What payment methods are accepted for LM4041CEM3-ADJ-TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CEM3-ADJ-TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CEM3-ADJ-TI?
LM4041CEM3-ADJ-TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CEM3-ADJ-TI 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-TI?
For technical support, including LM4041CEM3-ADJ-TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CEM3-ADJ-TI requirements.
6.How does Aetrix verify that LM4041CEM3-ADJ-TI is sourced from the original manufacturer or authorized distributors?
All LM4041CEM3-ADJ-TI 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-TI meets industry standards.
7.What is the process for return or replacement of LM4041CEM3-ADJ-TI?
All LM4041CEM3-ADJ-TI units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CEM3-ADJ-TI, 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-TI part is unused and in its original packaging.
Return procedure for LM4041CEM3-ADJ-TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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