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Texas Instruments LM4041CIM3-ADJ
- Part No.:
- LM4041CIM3-ADJ
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CIM3-ADJ.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,253
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Product details
Overview
LM4041CIM3-ADJ 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, enabling high-accuracy analog sensing in space-constrained automotive and industrial systems.
For engineers reviewing the LM4041CIM3-ADJ datasheet, LM4041CIM3-ADJ pinout, LM4041CIM3-ADJ application, or LM4041CIM3-ADJ equivalent, key selection criteria include its adjustable output (1.24 V to 10 V), no-output-capacitor requirement, capacitive-load stability, low feedback current (≤100 nA), and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4041CIM3-ADJ uses a bandgap-based shunt architecture with curvature-corrected temperature drift compensation, achieving stable reverse breakdown voltage across wide current (60 µA–12 mA) and temperature (−40°C to +125°C) ranges. Its feedback (FB) pin enables precise external resistor-divider programming of output voltage.
It features low dynamic output impedance (0.3 Ω typical at 1 mA), minimal load regulation error (≤6 mV over 1–12 mA), and thermal hysteresis of only 0.08% - critical for repeatable calibration in metering and data-acquisition systems where long-term voltage stability is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.233 V nominal at 100 µA, VOUT = 5 V - sets baseline for external resistor divider scaling |
| Initial Tolerance | ±0.5% at 25°C (C-grade) - enables <10 mV absolute error in 5 V systems without trimming |
| Temp Coefficient | ±100 ppm/°C max (−40°C to +125°C) - ensures ≤±6.2 mV drift over full range in 5 V designs |
| Operating Current | 60 µA min / 12 mA max - supports ultra-low-power sensor biasing and high-current DAC reference buffering |
| Noise (10 Hz–10 kHz) | 20 µVRMS - preserves SNR in 16-bit+ ADC front-ends and precision instrumentation |
| Feedback Current | ≤100 nA at 25°C - minimizes divider resistor-induced error and power loss in high-impedance networks |
| Output Range | 1.24 V to 10 V - covers standard logic supply rails (3.3 V, 5 V) and extended industrial sensing ranges |
Pinout & Package
SOT-23 (DBZ) 3-pin surface-mount package (1.30 mm × 2.92 mm), rated for −40°C to +125°C operation. Pin 1 = FB (feedback input), Pin 2 = Cathode (shunt current path/output node), Pin 3 = Anode (ground reference).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (FB) | Feedback input | High-impedance node (≤100 nA) that senses divided output voltage to regulate reference; must be connected to external resistor divider |
| Pin 2 (Cathode) | Shunt current sink / output node | Primary connection point for load and external circuitry; carries all shunt current and defines output voltage potential |
| Pin 3 (Anode) | Ground reference | Low-impedance return path; must be tied to system ground with minimal trace inductance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage (1.24 V–10 V) | Enables single BOM item to support multiple rail voltages via external resistors - reduces inventory and design variants |
| No output capacitor required | Eliminates board space, cost, and reliability risk of external capacitor; simplifies layout in tight spaces |
| Stable with capacitive loads | Supports direct connection to ADC input caps, op-amp inputs, or long PCB traces without oscillation or settling issues |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (−40°C to +125°C), including thermal cycling and lifetime reliability testing |
| Low 20 µVRMS noise | Preserves effective resolution in high-precision 16–18-bit data acquisition systems without added filtering |
Applications
| Battery-Powered Sensor Node | Data-Acquisition Front-End |
|---|---|
Use Scenario: Low-power IoT sensor node measuring temperature and humidity using 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V for ADC VREF, biased by microcontroller GPIO with 100 µA current source. Use Value: Enables <1 LSB error over −25°C to +70°C with no external capacitor, extending battery life via 60 µA minimum operating current. | Use Scenario: Industrial 4–20 mA transmitter with isolated 24-bit ADC and microcontroller. IC Role / Device Role / Timing Role: Precision 5 V reference for ADC and DAC, sourced from isolated DC-DC converter output. Use Value: Delivers ±0.5% initial accuracy and ±100 ppm/°C drift, meeting Class 0.1 metering accuracy requirements per IEC 62053. |
| Automotive Cabin Controller | Energy Meter Calibration Circuit |
Use Scenario: HVAC control module requiring accurate thermistor biasing and ADC reference under engine-bay temperature stress. IC Role / Device Role / Timing Role: Adjustable 3.3 V reference for microcontroller ADC and analog front-end, operating across −40°C to +125°C. Use Value: AEC-Q100 Grade 1 qualification and 0.08% thermal hysteresis ensure repeatable calibration after thermal cycling in real-world vehicle environments. | Use Scenario: Revenue-grade electricity meter requiring traceable voltage reference for metrology IC calibration. IC Role / Device Role / Timing Role: Primary 2.5 V reference for metrology ASIC, driven from low-noise LDO with 100 µA current limit. Use Value: 20 µVRMS noise and 120 ppm long-term stability (1000 hrs) meet ANSI C12.20 Class 0.2 accuracy retention 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 |
|---|---|---|---|
| TL431CDBVR | Fixed 2.495 V output; higher 2 mA min operating current; ±2% initial tolerance | Not suitable for sub-2.5 V or programmable outputs; requires external resistor network for adjustment | Select when fixed 2.5 V reference suffices and higher current budget is acceptable |
| MAX6126AASA+ | Series topology; 4.096 V fixed output; 35 ppm/°C tempco; 1.2 µA quiescent current | Requires input voltage ≥ VOUT + dropout; not shunt-based - cannot sink current or operate as floating reference | Select for ultra-low-power series reference where supply headroom exists and shunt topology is unnecessary |
Compared with TL431CDBVR and MAX6126AASA+, the LM4041CIM3-ADJ uniquely combines adjustable output (1.24–10 V), ultra-low 60 µA operating current, and shunt topology - enabling floating reference configurations, minimal board area, and compatibility with current-source biasing in battery-powered and automotive systems.
Availability
LM4041CIM3-ADJ is available at Aetrix Electronics and suitable for battery-powered equipment, data-acquisition systems, and automotive electronics requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for LM4041CIM3-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, embedded processing, and power management technologies, with decades of expertise in precision reference design.
The LM4041-N product line delivers micro-power shunt voltage references optimized for space-constrained, high-accuracy applications in automotive, industrial, and portable instrumentation - emphasizing low drift, low noise, and robust temperature performance.
FAQ
What is the maximum output voltage supported by the LM4041CIM3-ADJ?
The LM4041CIM3-ADJ supports an output voltage range of 1.24 V to 10 V, set by external resistor dividers connected to the FB pin. This upper limit is defined by the absolute maximum rating of 15 V on the cathode pin, with recommended operation capped at 10 V to maintain specified electrical characteristics and long-term reliability across temperature.
Does the LM4041CIM3-ADJ require an external output capacitor for stability?
No, the LM4041CIM3-ADJ does not require an external output capacitor. Its internal design ensures inherent stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces - eliminating board space, cost, and potential phase-margin risks associated with external compensation.
What is the feedback current specification for the LM4041CIM3-ADJ at 25°C?
The LM4041CIM3-ADJ has a maximum feedback current of 100 nA at 25°C, as specified in the C-grade electrical characteristics table. This ultra-low input bias enables high-value resistor dividers (e.g., 1 MΩ/1 MΩ for 5 V output) without introducing significant voltage error or power loss in precision applications.
Is the LM4041CIM3-ADJ qualified for automotive applications?
Yes, the LM4041CIM3-ADJ is AEC-Q100 Grade 1 qualified, certified for operation from −40°C to +125°C ambient temperature. It meets automotive reliability requirements including thermal cycling, humidity testing, and lifetime validation - making it suitable for cabin controllers, body electronics, and powertrain-sensing modules.
How does the LM4041CIM3-ADJ achieve low temperature coefficient performance?
The LM4041CIM3-ADJ achieves ±100 ppm/°C max temperature coefficient through bandgap reference design with curvature correction and laser-trimmed Zener-fuse elements during wafer sort. This compensates for second-order thermal effects, ensuring predictable, monotonic drift behavior across −40°C to +125°C without external calibration.
LM4041CIM3-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:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CIM3-ADJ FAQ
1.How can I place an order for LM4041CIM3-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIM3-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 LM4041CIM3-ADJ reliable?
The price and inventory of LM4041CIM3-ADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIM3-ADJ is usually 5 days.
3.What payment methods are accepted for LM4041CIM3-ADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIM3-ADJ transactions.
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4.How is shipping managed for LM4041CIM3-ADJ?
LM4041CIM3-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIM3-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 LM4041CIM3-ADJ?
For technical support, including LM4041CIM3-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIM3-ADJ requirements.
6.How does Aetrix verify that LM4041CIM3-ADJ is sourced from the original manufacturer or authorized distributors?
All LM4041CIM3-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 LM4041CIM3-ADJ meets industry standards.
7.What is the process for return or replacement of LM4041CIM3-ADJ?
All LM4041CIM3-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIM3-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 LM4041CIM3-ADJ part is unused and in its original packaging.
Return procedure for LM4041CIM3-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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