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Texas Instruments LM4041DIM3-ADJ
- Part No.:
- LM4041DIM3-ADJ
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DIM3-ADJ.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,755
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Product details
Overview
LM4041DIM3-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 and supports output voltages from 1.24 V to 10 V - ideal for high-accuracy ADC biasing in portable instrumentation.
For engineers reviewing the LM4041DIM3-ADJ datasheet, LM4041DIM3-ADJ pinout, LM4041DIM3-ADJ application, or LM4041DIM3-ADJ equivalent, key selection criteria include its adjustable output range, low quiescent current, automotive-grade AEC-Q100 qualification (Grade 1: –40°C to +125°C), and stability with capacitive loads without external compensation.
Technical Context
The LM4041DIM3-ADJ uses a bandgap-based shunt architecture with curvature-corrected temperature drift compensation, enabling stable reference voltage across industrial and extended temperature ranges. Its feedback (FB) pin enables resistor-divider programming of output voltage while maintaining tight regulation over load and supply variations.
It features low dynamic output impedance (0.3 Ω typical at 1 mA), minimal feedback current (60–100 nA), and inherent immunity to capacitive loading - eliminating need for output capacitors and simplifying layout in space-constrained designs such as battery-powered sensor nodes and portable data loggers.
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 | ±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 ≤ ±6.25 mV drift over full Grade 1 range |
| Operating Current | 60 μA min to 12 mA max - supports ultra-low-power sensing and high-current DAC reference buffering |
| Noise (10 Hz–10 kHz) | 20 μVRMS - preserves ENOB in 16-bit+ SAR ADCs without additional filtering |
| Dynamic Impedance | 0.3 Ω typical at 1 mA - minimizes load-induced voltage sag during fast transient currents |
| Feedback Current | 60–100 nA - allows use of >10 MΩ divider resistors, reducing power and thermal drift |
Pinout & Package
SOT-23 (DBZ) package: 1.30 mm × 2.92 mm body, 3-pin surface-mount, JEDEC MO-178AA compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 3) | Ground reference node | Must be connected to system ground; serves as return path for shunt current |
| Cathode (Pin 2) | Output & shunt current sink | Delivers regulated voltage; sinks all current not diverted through feedback network |
| FB (Pin 1) | Reference input | High-impedance node that samples divided output to control cathode voltage |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output (1.24–10 V) | Enables single BOM part to support multiple system voltage rails via external resistor divider |
| No output capacitor required | Reduces bill-of-materials and PCB area in compact designs like wearables and IoT edge nodes |
| AEC-Q100 Grade 1 qualified | Validated for automotive under-hood applications with guaranteed operation from –40°C to +125°C |
| Tolerates capacitive loads | Stable with >1 μF ceramic output capacitance - simplifies EMI filtering and bypassing |
| Low 20 μVRMS noise | Meets noise floor requirements for precision 16-bit+ analog front-ends without post-regulation |
Applications
| Portable Data Acquisition | Automotive Sensor Conditioning |
|---|---|
Use Scenario: Battery-powered handheld multimeter acquiring 16-bit ADC samples at 1 kSPS. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V reference for SAR ADC conversion. Use Value: ±0.5% initial tolerance and ±100 ppm/°C drift ensure <0.01% full-scale error across operating temperature without calibration. | Use Scenario: Engine coolant temperature sensor signal conditioning in Tier-1 ECU module. IC Role / Device Role / Timing Role: Precision bias source for op-amp instrumentation amplifier driving 12-bit ADC. Use Value: AEC-Q100 Grade 1 qualification and 20 μVRMS noise enable reliable operation in high-EMI under-hood environments. |
| Smart Energy Metering | Industrial Process Transmitter |
Use Scenario: Three-phase electricity meter requiring metrology-grade voltage reference for anti-tampering compliance. IC Role / Device Role / Timing Role: Primary reference for isolated sigma-delta ADC measuring line voltage with 0.1% accuracy. Use Value: 120 ppm long-term stability (1000 hrs) and 0.08% thermal hysteresis meet IEC 62053-21 Class 0.2 requirements. | Use Scenario: 4–20 mA loop-powered pressure transmitter operating in hazardous Zone 2 environments. IC Role / Device Role / Timing Role: Low-current shunt reference powering signal chain within 3.5 mA total loop budget. Use Value: 60 μA minimum operating current allows full functionality at lowest loop current, preserving headroom for sensor excitation. |
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; higher 2.5 Ω dynamic impedance; no adjustable version | Requires external op-amp for adjustable outputs; unsuitable for sub-2.5 V references | Choose when fixed 2.5 V reference suffices and cost is primary constraint |
| MAX6126AASA+ | Series topology; 1.25 V fixed output; 3 ppm/°C tempco; requires input-to-output headroom | Cannot operate as shunt; needs ≥1.5 V supply margin; incompatible with floating-sense topologies | Choose for ultra-low-drift (<5 ppm/°C) fixed-voltage needs where supply headroom exists |
Compared with TL431CDBZR and MAX6126AASA+, the LM4041DIM3-ADJ uniquely combines adjustable output, shunt topology, sub-100 ppm/°C drift, and SOT-23 footprint - making it optimal for space-limited, low-headroom, and multi-rail reference applications where flexibility and qualification matter.
Availability
LM4041DIM3-ADJ is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, smart energy metering, and industrial process transmitters requiring stable component supply with AEC-Q100 Grade 1 assurance.
Supply support for LM4041DIM3-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 expertise in precision reference design and automotive qualification.
The LM4041-N series was engineered for high-accuracy, low-power shunt reference applications in harsh environments - particularly targeting battery-operated test equipment, automotive ECUs, and industrial control systems demanding long-term stability and temperature resilience.
FAQ
What output voltage range does the LM4041DIM3-ADJ support?
The LM4041DIM3-ADJ supports an output voltage range from 1.24 V to 10 V, set by an external resistor divider connected to its FB pin. This is achieved using the internal 1.233 V reference voltage and high-impedance feedback input (60–100 nA), allowing precise programmability without loading errors - a key capability distinguishing LM4041DIM3-ADJ from fixed-output alternatives.
Is the LM4041DIM3-ADJ qualified for automotive applications?
Yes, the LM4041DIM3-ADJ is AEC-Q100 qualified as Grade 1 (–40°C to +125°C ambient), meeting stringent reliability and stress-test requirements for automotive under-hood and cabin applications. This qualification applies specifically to the LM4041DIM3-ADJ variant in SOT-23 packaging, as documented in TI's official LM4041-N-Q1 datasheet revision July 2025.
Does the LM4041DIM3-ADJ require an output capacitor for stability?
No, the LM4041DIM3-ADJ does not require an output capacitor for stability. Its internal design provides unconditional stability with any capacitive load, including >1 μF ceramic capacitors. This eliminates external components, reduces PCB area, and avoids potential resonance issues - a verified behavior confirmed in Section 3 and Figure 4-4 of the LM4041-N datasheet.
What is the minimum operating current for the LM4041DIM3-ADJ?
The LM4041DIM3-ADJ has a minimum operating current of 60 μA at 25°C (70 μA over –40°C to +125°C), as specified in Section 5.8 of the datasheet. This ultra-low current enables operation in energy-harvesting and coin-cell-powered systems, while still maintaining ±0.5% initial tolerance and 20 μVRMS noise performance - critical for LM4041DIM3-ADJ deployment in always-on sensor nodes.
How does the LM4041DIM3-ADJ handle thermal hysteresis?
The LM4041DIM3-ADJ exhibits 0.08% thermal hysteresis - defined as the voltage difference measured at +25°C after cycling between –40°C and +125°C. This low hysteresis, combined with ±100 ppm/°C temperature coefficient, ensures repeatable reference accuracy across thermal cycles in applications like portable calibrators and field-deployed instrumentation where LM4041DIM3-ADJ operates in non-climate-controlled environments.
LM4041DIM3-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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DIM3-ADJ FAQ
1.How can I place an order for LM4041DIM3-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DIM3-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 LM4041DIM3-ADJ reliable?
The price and inventory of LM4041DIM3-ADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DIM3-ADJ is usually 5 days.
3.What payment methods are accepted for LM4041DIM3-ADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DIM3-ADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DIM3-ADJ?
LM4041DIM3-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DIM3-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 LM4041DIM3-ADJ?
For technical support, including LM4041DIM3-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DIM3-ADJ requirements.
6.How does Aetrix verify that LM4041DIM3-ADJ is sourced from the original manufacturer or authorized distributors?
All LM4041DIM3-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 LM4041DIM3-ADJ meets industry standards.
7.What is the process for return or replacement of LM4041DIM3-ADJ?
All LM4041DIM3-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DIM3-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 LM4041DIM3-ADJ part is unused and in its original packaging.
Return procedure for LM4041DIM3-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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