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Analog Devices Inc./Maxim Integrated LM4041AIM3-1.2+T
- Part No.:
- LM4041AIM3-1.2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041AIM3-1.2+T.pdf
- Description:
- IC VREF SHUNT 1.225V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,287
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Product details
Overview
LM4041AIM3-1.2+T from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SOT23-3 package, featuring 0.1% initial accuracy, 100ppm/°C max temperature coefficient, and 60µA–12mA operating current range. It delivers stable reference voltage for ADCs, DACs, and battery-monitoring circuits in space-constrained portable systems.
For engineers reviewing the LM4041AIM3-1.2+T datasheet, LM4041AIM3-1.2+T pinout, LM4041AIM3-1.2+T application, or LM4041AIM3-1.2+T equivalent, this page provides verified specifications, validated pin functions, real-world use cases, and confirmed alternative options for precision analog design and low-power embedded reference circuits.
Technical Context
The LM4041AIM3-1.2+T implements a bandgap-based shunt architecture with laser-trimmed resistors to achieve ±1.2mV (0.1%) initial tolerance at +25°C. Its internal pass transistor regulates reverse breakdown voltage by sinking variable current across an external source resistor.
It operates without output capacitors and remains stable with any capacitive load, supported by low 20µVRMS wideband noise (10Hz–10kHz) and ≤1.5Ω dynamic impedance at 1mA. Guaranteed over –40°C to +85°C, it maintains performance under varying supply and load conditions typical of battery-powered instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V fixed reverse breakdown voltage - sets precise reference level for analog signal conditioning and data converter biasing. |
| Initial Accuracy | ±0.1% (±1.2mV) at +25°C - enables high-resolution measurement without calibration in 12-bit+ systems. |
| Temp Coefficient | 100ppm/°C max - ensures <±0.075% voltage drift over –40°C to +85°C, critical for industrial sensor front-ends. |
| Operating Current | 60µA to 12mA - supports ultra-low-power sleep modes and high-current regulation in active state. |
| Noise (10Hz–10kHz) | 20µVRMS - minimizes added error in precision ADC references and low-noise amplifiers. |
| Dynamic Impedance | ≤1.5Ω at 1mA - maintains tight voltage regulation despite rapid load transients in mixed-signal SoCs. |
| Temperature Range | –40°C to +85°C - qualified for commercial and extended-temperature portable electronics applications. |
Pinout & Package
LM4041AIM3-1.2+T uses the industry-standard 3-pin SOT23-3 surface-mount package (2.92mm × 1.3mm × 1.0mm), compatible with automated assembly and offering thermal resistance of 4.01mW/°C above +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive terminal | Connects to system ground or low-impedance return path; forms cathode-to-anode reverse bias path. |
| 2 (–) | Cathode / Negative terminal | Reference output node; voltage measured between Pin 2 and Pin 1 is 1.225V when reverse-biased. |
| 3 (N.C.) | No-connect terminal | Must be left floating or tied to Pin 2; no internal connection - prevents parasitic coupling or ESD path misrouting. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT23-3 package | Enables placement in dense PCB layouts where SC70 is unavailable or incompatible with pick-and-place tooling. |
| No output capacitor required | Reduces BOM count and layout area while eliminating capacitor aging, leakage, and ESR-related instability risks. |
| Tolerates any capacitive load | Supports direct connection to ADC input caps, op-amp feedback networks, or long traces without oscillation. |
| Laser-trimmed bandgap core | Delivers production-tested 0.1% accuracy without post-assembly trimming, lowering test cost and improving yield. |
| Low 20µVRMS noise | Preserves SNR in 16-bit SAR ADC references and avoids additional filtering stages in precision sensor interfaces. |
Applications
| Battery Voltage Monitoring | Portable Medical Sensors |
|---|---|
Use Scenario: Real-time Li-ion cell voltage sampling in smart battery packs with microcontroller-based fuel gauging. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225V基准 for 12-bit internal ADC, enabling ±5mV absolute voltage accuracy. Use Value: Enables accurate state-of-charge estimation over full temperature range without recalibration, extending battery life reporting fidelity. | Use Scenario: Low-power ECG front-end with rail-to-rail op-amps and 16-bit delta-sigma ADC in wearable patch monitors. IC Role / Device Role / Timing Role: Precision reference for ADC reference input and op-amp biasing, operating continuously at 80µA quiescent current. Use Value: Maintains <0.01% gain error across –20°C to +50°C ambient, ensuring clinical-grade signal integrity in sub-gram wearable form factors. |
| Industrial 4–20mA Transmitters | Smart Energy Meters |
Use Scenario: Two-wire loop-powered pressure transmitter with HART modulation, requiring stable excitation and ADC reference. IC Role / Device Role / Timing Role: Shunt reference sourcing regulated current through loop while maintaining 1.225V reference for DAC-controlled output stage. Use Value: Supports 0.1% total unadjusted error (TUE) over –40°C to +85°C, meeting IEC 61000-6-2 immunity requirements without derating. | Use Scenario: Polyphase electricity meter using isolated sigma-delta ADCs for voltage and current channel measurement. IC Role / Device Role / Timing Role: Primary reference for metrology ADCs, powered from auxiliary DC-DC converter with tight ripple control. Use Value: Delivers <20ppm/°C drift contribution to overall meter accuracy class 0.2S, satisfying ANSI C12.20 and IEC 62053-22 standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | 2.5V adjustable output (via external resistors); 0.5% initial accuracy; 100ppm/°C tempco; requires minimum 80µA cathode current. | Not drop-in: requires redesign of feedback network; higher reference voltage increases power in low-VIN systems. | Select when adjustable output or higher voltage is needed; avoid if 1.225V fixed reference and minimal component count are mandatory. |
| REF3012AIDBZR | 1.2V output; 0.2% initial accuracy; 50ppm/°C tempco; 3-pin SOT23; 50µA–25mA operating range; requires 1µF output capacitor for stability. | Requires external capacitor; tighter tempco but looser initial tolerance; slightly lower output voltage affects ADC full-scale mapping. | Prefer for ultra-low-drift designs where capacitor addition is acceptable; verify 1.2V vs. 1.225V impact on system gain calibration. |
Compared with TLVH431ACDBVR and REF3012AIDBZR, the LM4041AIM3-1.2+T offers exact 1.225V output, highest initial accuracy (0.1%), and zero-capacitor operation - making it optimal for space- and BOM-constrained 1.2V–1.8V systems requiring guaranteed stability without layout modifications.
Availability
LM4041AIM3-1.2+T is available at Aetrix Electronics and suitable for portable medical sensors, battery management systems, and industrial 4–20mA transmitters requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
Supply support for LM4041AIM3-1.2+T 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The LM4041 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated systems demanding precision, stability, and zero-capacitor simplicity - targeting portable instrumentation, sensor nodes, and energy-harvesting applications.
FAQ
What is the output voltage tolerance of the LM4041AIM3-1.2+T at +25°C?
The LM4041AIM3-1.2+T has a guaranteed initial accuracy of ±0.1% at +25°C, corresponding to ±1.2mV around its nominal 1.225V reverse breakdown voltage. This is achieved via laser trimming and validated during 100% production testing per Maxim's datasheet specification table for the 'A' grade device.
Does the LM4041AIM3-1.2+T require an external output capacitor?
No, the LM4041AIM3-1.2+T does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces - a key differentiator from many series references and other shunt devices like the REF3012.
What is the minimum operating current for the LM4041AIM3-1.2+T?
The LM4041AIM3-1.2+T requires a minimum shunt current of 60µA to maintain regulation and specified accuracy. Below this threshold, the reverse breakdown voltage deviates from 1.225V, potentially introducing errors in precision measurement circuits relying on the LM4041AIM3-1.2+T as a reference source.
Can Pin 3 of the LM4041AIM3-1.2+T be connected to ground?
No - Pin 3 of the LM4041AIM3-1.2+T is marked N.C. (No Connect) and must either be left floating or connected to Pin 2 (cathode). Connecting Pin 3 to ground creates an unintended current path that may disrupt regulation, increase noise, or cause functional failure; the datasheet explicitly prohibits grounding Pin 3.
What is the maximum junction temperature rating for the LM4041AIM3-1.2+T?
The LM4041AIM3-1.2+T has a maximum junction temperature rating of +150°C. Its SOT23-3 package features a thermal derating factor of 4.01mW/°C above +70°C, meaning sustained power dissipation must be managed to prevent exceeding this limit - especially in high-ambient or high-current applications.
LM4041AIM3-1.2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 60 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041AIM3-1.2+T FAQ
1.How can I place an order for LM4041AIM3-1.2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041AIM3-1.2+T 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 LM4041AIM3-1.2+T reliable?
The price and inventory of LM4041AIM3-1.2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041AIM3-1.2+T is usually 5 days.
3.What payment methods are accepted for LM4041AIM3-1.2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041AIM3-1.2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041AIM3-1.2+T?
LM4041AIM3-1.2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041AIM3-1.2+T 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 LM4041AIM3-1.2+T?
For technical support, including LM4041AIM3-1.2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041AIM3-1.2+T requirements.
6.How does Aetrix verify that LM4041AIM3-1.2+T is sourced from the original manufacturer or authorized distributors?
All LM4041AIM3-1.2+T 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 LM4041AIM3-1.2+T meets industry standards.
7.What is the process for return or replacement of LM4041AIM3-1.2+T?
All LM4041AIM3-1.2+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041AIM3-1.2+T, 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 LM4041AIM3-1.2+T part is unused and in its original packaging.
Return procedure for LM4041AIM3-1.2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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