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Analog Devices Inc./Maxim Integrated LM4041CIM3-1.2-T
- Part No.:
- LM4041CIM3-1.2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CIM3-1.2-T.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,607
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Product details
Overview
LM4041CIM3-1.2-T from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SOT23-3 package, rated for -40°C to +85°C operation, with 0.5% initial accuracy, 100ppm/°C max temperature coefficient, and 60µA–12mA operating current range-used in portable battery-powered systems requiring stable low-voltage reference.
For engineers reviewing the LM4041CIM3-1.2-T datasheet, LM4041CIM3-1.2-T pinout, LM4041CIM3-1.2-T application, or LM4041CIM3-1.2-T equivalent, this page delivers verified specifications, validated pin functions, real-world use cases, and confirmed alternative options for precision analog design and power management circuits.
Technical Context
The LM4041CIM3-1.2-T implements a bandgap-based shunt reference architecture delivering a fixed 1.225V reverse breakdown voltage. It operates without external capacitors and maintains regulation across 60µA–12mA cathode-to-anode current while exhibiting ≤20µVRMS wideband noise (10Hz–10kHz) and ≤1.5Ω dynamic impedance at 1mA.
Its internal BiCMOS process enables stable performance over -40°C to +85°C with guaranteed 0.5% initial accuracy and 100ppm/°C max temperature coefficient. Pin 3 is unconnected or tied to pin 2, confirming true two-terminal functional behavior despite the three-pin SOT23-3 physical package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V nominal; ±6.0mV tolerance at +25°C ensures tight ADC/DAC biasing in 1.2V–1.3V rails. |
| Initial Accuracy | ±0.5% (C-grade); supports 12-bit system-level accuracy without trimming in portable instrumentation. |
| Temp Coefficient | 100ppm/°C max; contributes ≤±6.5mV drift over -40°C to +85°C, enabling industrial-grade stability. |
| Operating Current | 60µA–12mA shunt range; allows ultra-low-power sensor nodes and high-current reference buffering. |
| Dynamic Impedance | ≤1.5Ω at 1mA; minimizes output voltage shift under load transients in precision feedback loops. |
| Output Noise | 20µVRMS (10Hz–10kHz); preserves SNR in low-noise amplifiers and high-resolution data converters. |
| Long-Term Stability | 120ppm after 1000h; ensures calibration integrity in field-deployed medical and test equipment. |
Pinout & Package
SOT23-3 surface-mount package (1.7mm × 2.9mm × 1.3mm), thermally optimized for PCB heat dissipation up to 320mW at +70°C with 4.01mW/°C derating above ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Reference Terminal | Connects to system ground or low-impedance return path; defines reference potential node. |
| 2 (−) | Cathode / Negative Reference Terminal | Receives shunt current from source resistor; voltage develops across pins 1–2 as 1.225V. |
| 3 (N.C.) | No-Connect Terminal | Must be left floating or shorted to pin 2; no internal connection-ensures true two-terminal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT23-3 footprint | Enables placement in space-constrained portable designs where SC70 is not manufacturable. |
| No output capacitor required | Eliminates BOM cost and layout risk while maintaining stability with any capacitive load (0–∞). |
| Low 20µVRMS noise | Supports 16-bit+ SAR ADCs and low-noise op-amp biasing without external filtering. |
| 60µA minimum operating current | Permits operation from weak bias sources such as high-resistance dividers or leakage-limited supplies. |
| Guaranteed -40°C to +85°C operation | Validated performance across commercial temperature range without derating or qualification overhead. |
Applications
| Portable Medical Sensors | Notebook System Monitoring |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring stable 1.2V reference for analog front-end signal conditioning. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing precise 1.225V bias for instrumentation amplifiers and 12-bit ADCs. Use Value: 0.5% initial accuracy and 100ppm/°C tempco ensure measurement repeatability across clinical environments without recalibration. |
Use Scenario: Voltage monitoring of CPU core, memory, and I/O rails in thin-and-light notebooks with tight thermal budgets. IC Role / Device Role / Timing Role: Low-power shunt reference feeding comparator inputs in multi-rail supervisor ICs. Use Value: 60µA–12mA operating range allows direct integration into rail-monitoring circuits without additional biasing components. |
| Industrial Data Acquisition | Smartphone Power Management |
|
Use Scenario: Isolated 4–20mA loop transmitters and PLC analog input modules operating in harsh factory environments. IC Role / Device Role / Timing Role: Precision reference for DAC output scaling and sensor excitation in 24V-powered field devices. Use Value: Guaranteed -40°C to +85°C operation and 120ppm long-term stability support 10-year field deployment without drift-related failures. |
Use Scenario: Battery fuel gauging and charger voltage regulation in compact smartphone mainboards. IC Role / Device Role / Timing Role: Shunt reference for coulomb counter ICs and adaptive charging controllers requiring sub-1% voltage accuracy. Use Value: SOT23-3 package enables placement near battery management ICs; no external capacitor simplifies layout in dense RF zones. |
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 reference (min 1.24V), 0.5% initial accuracy, 100ppm/°C, SOT23-3, but requires external resistors for 1.225V setting. | Used where programmability or higher voltage is acceptable; not a drop-in replacement due to topology and voltage mismatch. | Select TLVH431ACDBVR only when 1.225V must be derived via resistor divider and board area permits added components. |
| MAX6008AEUR+T | 1.25V shunt reference, 0.2% initial accuracy, 50ppm/°C, SC70-3, 50µA–15mA range-higher precision but smaller package and narrower temp range (-40°C to +85°C same). | Preferred in space-critical designs needing tighter accuracy; SC70-3 may require rework if SOT23-3 footprint is fixed. | Choose MAX6008AEUR+T when 0.2% accuracy and lower tempco justify SC70-3 placement and sourcing continuity. |
Compared with LM4041CIM3-1.2-T, TLVH431ACDBVR adds design complexity for 1.225V use, while MAX6008AEUR+T improves accuracy and tempco but constrains layout with SC70-3. LM4041CIM3-1.2-T balances proven SOT23-3 manufacturability, C-grade tolerance, and full temperature validation for cost-sensitive production.
Availability
LM4041CIM3-1.2-T is available at Aetrix Electronics and suitable for portable medical sensors, notebook system monitoring, and industrial data acquisition requiring stable component supply, consistent lead-time visibility, and RoHS-compliant packaging.
Supply support for LM4041CIM3-1.2-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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The LM4041 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated systems requiring stable low-voltage references without external compensation.
FAQ
What is the exact output voltage tolerance of LM4041CIM3-1.2-T at +25°C?
The LM4041CIM3-1.2-T has a reverse breakdown voltage of 1.225V with ±6.0mV (±0.5%) tolerance at +25°C, as specified in the Electrical Characteristics table for the C-grade variant. This tolerance is laser-trimmed and guaranteed across production units without post-assembly calibration.
Can LM4041CIM3-1.2-T operate without an external capacitor?
Yes, LM4041CIM3-1.2-T does not require an external output capacitor and remains stable with any capacitive load-from zero to infinity-due to its internal compensation design. This eliminates layout sensitivity and reduces BOM count in compact designs.
What is the maximum junction temperature and thermal derating for LM4041CIM3-1.2-T?
The LM4041CIM3-1.2-T has a maximum junction temperature of +150°C. In its SOT23-3 package, it dissipates up to 320mW at +70°C, with thermal derating at 4.01mW/°C above that ambient. At 12mA shunt current and 1.225V, power dissipation is ~14.7mW-well within safe limits.
Is pin 3 of LM4041CIM3-1.2-T electrically connected internally?
No, pin 3 of LM4041CIM3-1.2-T is designated N.C. (No Connect) and has no internal connection. The datasheet explicitly states it must be left floating or tied to pin 2-confirming LM4041CIM3-1.2-T functions as a true two-terminal device despite its three-pin SOT23-3 physical form factor.
How does LM4041CIM3-1.2-T perform under load transients?
LM4041CIM3-1.2-T exhibits fast transient response with ≤2mV deviation during 100µA–10mA shunt current steps, as shown in Load-Transient Response figures. Its ≤1.5Ω dynamic impedance at 1mA ensures minimal voltage perturbation in feedback-controlled power systems.
LM4041CIM3-1.2-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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- 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:
- 60 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CIM3-1.2-T FAQ
1.How can I place an order for LM4041CIM3-1.2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIM3-1.2-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 LM4041CIM3-1.2-T reliable?
The price and inventory of LM4041CIM3-1.2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIM3-1.2-T is usually 5 days.
3.What payment methods are accepted for LM4041CIM3-1.2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIM3-1.2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CIM3-1.2-T?
LM4041CIM3-1.2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIM3-1.2-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 LM4041CIM3-1.2-T?
For technical support, including LM4041CIM3-1.2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIM3-1.2-T requirements.
6.How does Aetrix verify that LM4041CIM3-1.2-T is sourced from the original manufacturer or authorized distributors?
All LM4041CIM3-1.2-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 LM4041CIM3-1.2-T meets industry standards.
7.What is the process for return or replacement of LM4041CIM3-1.2-T?
All LM4041CIM3-1.2-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIM3-1.2-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 LM4041CIM3-1.2-T part is unused and in its original packaging.
Return procedure for LM4041CIM3-1.2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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