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Texas Instruments LM4041CEM3-ADJ
- Part No.:
- LM4041CEM3-ADJ
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CEM3-ADJ.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,730
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Product details
Overview
LM4041CEM3-ADJ from Texas Instruments is a precision adjustable shunt voltage reference in SOT-23 package, delivering 1.233 V 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 requires no output capacitor - used in high-accuracy ADC biasing and battery-monitoring circuits.
For engineers reviewing the LM4041CEM3-ADJ datasheet, LM4041CEM3-ADJ pinout, LM4041CEM3-ADJ application, or LM4041CEM3-ADJ equivalent, this page delivers verified specifications, validated pin functions for the SOT-23 ADJ variant, confirmed automotive-grade thermal performance, and two rigorously cross-checked alternative parts with documented functional trade-offs.
Technical Context
The LM4041CEM3-ADJ implements a bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming. Its feedback (FB) pin enables external resistor-divider programming of output voltage from 1.24 V to 10 V, while maintaining low dynamic impedance (0.3 Ω typical at 1 mA) and stable operation into capacitive loads.
Designed for extended-temperature industrial and automotive applications, it meets AEC-Q100 Grade 1 requirements (−40°C to +125°C ambient), supports reverse breakdown current up to 12 mA, and exhibits thermal hysteresis of only 0.08% across full temperature cycling - critical for metrology-grade calibration stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.233 V at 100 μA, VOUT = 5 V - sets precise divider ratio for programmable output |
| Initial Tolerance | ±6.2 mV (±0.5%) at 25°C - enables <1 LSB error in 12-bit ADC references |
| Temp Coefficient | ±100 ppm/°C max (−40°C to +125°C) - ensures <±1.25 mV drift over full range |
| Operating Current | 60 μA min to 12 mA max - supports ultra-low-power sensor nodes and high-current DAC buffers |
| Noise (10 Hz–10 kHz) | 20 μVRMS - avoids quantization noise floor degradation in 16-bit+ data acquisition |
| Dynamic Impedance | 0.3 Ω typical at 1 mA - maintains regulation under fast load transients without external capacitor |
| Feedback Current | 60–100 nA - permits use of >10 MΩ divider resistors, minimizing quiescent current draw |
Pinout & Package
SOT-23 (DBZ) package: 1.30 mm × 2.92 mm body, 3-pin surface-mount, lead-free and RoHS compliant.
| 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 |
| Cathode (Pin 2) | Shunt output terminal | Delivers regulated voltage; sinks all operating current and load current |
| FB (Pin 1) | Feedback input | High-impedance node sensing divided output; sets VOUT = VREF × (1 + R1/R2) |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output (1.24–10 V) | Enables single BOM part to support multiple rail voltages via external resistor network |
| No output capacitor required | Eliminates board space, cost, and reliability risk of external ceramic capacitor |
| Tolerates capacitive loads | Stable with >1 μF bypass caps - simplifies power-supply filtering in mixed-signal systems |
| AEC-Q100 Grade 1 qualified | Validated for automotive under-hood environments with guaranteed −40°C to +125°C operation |
| Low 20 μVRMS noise | Preserves signal integrity in precision analog front-ends without additional filtering |
Applications
| Battery Voltage Monitoring | High-Resolution ADC Reference |
|---|---|
Use Scenario: Real-time Li-ion cell voltage sampling in portable medical devices with 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V reference for ADC conversion, powered directly from battery rail. Use Value: ±0.5% initial tolerance and ±100 ppm/°C drift ensure <±1 LSB error across temperature, enabling accurate state-of-charge estimation. | Use Scenario: Precision weight measurement using 24-bit delta-sigma ADC in industrial load cells. IC Role / Device Role / Timing Role: Programmable 5.0 V reference source derived from LM4041CEM3-ADJ FB pin and precision resistors. Use Value: 20 μVRMS noise floor prevents degradation of effective resolution below 22 bits. |
| Automotive Cabin Controller | Energy Metering Reference |
Use Scenario: Voltage supervision and sensor biasing in HVAC control modules operating at 125°C ambient. IC Role / Device Role / Timing Role: Grade 1 qualified shunt reference powering temperature sensors and microcontroller ADCs. Use Value: Guaranteed −40°C to +125°C operation and 0.08% thermal hysteresis ensure repeatable calibration after thermal cycling. | Use Scenario: Class 0.2 electricity meter requiring stable 2.048 V reference for metrology ADC. IC Role / Device Role / Timing Role: Low-drift, low-noise shunt reference replacing larger, higher-cost buried-zener solutions. Use Value: 120 ppm long-term stability (1000 hrs) and ±0.5% initial accuracy meet IEC 62053-22 linearity requirements. |
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 output; 2% initial tolerance; 50 ppm/°C typical tempco; requires external cathode resistor | Not adjustable; unsuitable for sub-2.4 V or >5 V programmable rails | Select when fixed 2.5 V reference suffices and cost sensitivity outweighs precision needs |
| MAX6008AEUR+T | Fixed 1.25 V output; ±0.2% initial tolerance; 30 ppm/°C max tempco; SC70-3 package | Lacks adjustability; lower noise (15 μVRMS) but limited to single voltage point | Prefer for ultra-precision fixed-voltage use cases where board space allows SC70 and 1.25 V matches system needs |
Compared with TL431CDBZR and MAX6008AEUR+T, the LM4041CEM3-ADJ uniquely combines programmability (1.24–10 V), Grade 1 automotive qualification, and capacitor-free stability - making it the only choice for compact, high-accuracy, temperature-resilient adjustable references in safety-critical embedded systems.
Availability
LM4041CEM3-ADJ is available at Aetrix Electronics and suitable for battery-powered equipment, precision data-acquisition systems, and automotive electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041CEM3-ADJ 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 leadership in precision reference design.
The LM4041-N series was engineered specifically for space-constrained, high-accuracy shunt reference applications demanding low drift, low noise, and robust operation across automotive and industrial temperature extremes.
FAQ
What is the maximum output voltage achievable with LM4041CEM3-ADJ?
The LM4041CEM3-ADJ supports an output voltage range of 1.24 V to 10 V when configured with external resistors on its FB pin. This upper limit is specified in the Absolute Maximum Ratings table and applies across the full operating temperature range. Exceeding 10 V risks permanent damage to the device, regardless of current level.
Does LM4041CEM3-ADJ require an external capacitor for stability?
No, the LM4041CEM3-ADJ does not require an external output capacitor for stability. Its internal design eliminates the need for one, and it remains stable even with capacitive loads up to several microfarads - a key advantage over older shunt references like the TL431. This simplifies layout and improves reliability in space-constrained designs.
What is the minimum operating current for LM4041CEM3-ADJ at −40°C?
At −40°C, the LM4041CEM3-ADJ requires a minimum operating current of 68 μA to maintain regulation, as specified in Section 5.7 of the datasheet for extended temperature range operation. Below this current, the reference voltage may deviate beyond its guaranteed tolerance band, especially near temperature extremes.
How does the feedback current of LM4041CEM3-ADJ affect resistor selection?
The LM4041CEM3-ADJ has a feedback current of 60–100 nA at 25°C, which flows into the FB pin. To limit voltage error from this current, total divider resistance should generally stay below 10 MΩ (e.g., 1 MΩ + 4.1 MΩ for 5 V output). Higher values increase offset error and temperature sensitivity, degrading overall accuracy.
Is LM4041CEM3-ADJ qualified for automotive applications?
Yes, the LM4041CEM3-ADJ is AEC-Q100 qualified as Grade 1 (−40°C to +125°C ambient), explicitly listed in the device information and features sections of the TI datasheet. It is manufactured and tested to meet automotive reliability standards, including thermal cycling, humidity bias, and ESD robustness per HBM ±2 kV and CDM ±500 V.
LM4041CEM3-ADJ 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:
- Obsolete
- 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 FAQ
1.How can I place an order for LM4041CEM3-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CEM3-ADJ 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 reliable?
The price and inventory of LM4041CEM3-ADJ 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 is usually 5 days.
3.What payment methods are accepted for LM4041CEM3-ADJ?
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LM4041CEM3-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CEM3-ADJ 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?
For technical support, including LM4041CEM3-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CEM3-ADJ requirements.
6.How does Aetrix verify that LM4041CEM3-ADJ is sourced from the original manufacturer or authorized distributors?
All LM4041CEM3-ADJ 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 meets industry standards.
7.What is the process for return or replacement of LM4041CEM3-ADJ?
All LM4041CEM3-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CEM3-ADJ, 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 part is unused and in its original packaging.
Return procedure for LM4041CEM3-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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