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Analog Devices Inc./Maxim Integrated LM4041CEM3-1.2-T
- Part No.:
- LM4041CEM3-1.2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CEM3-1.2-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
LM4041CEM3-1.2-T from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SOT23-3 package, rated for -40°C to +125°C operation, with 0.5% initial accuracy, 100ppm/°C max temperature coefficient, and 60µA–12mA operating current range-used in battery-powered instrumentation and industrial sensor signal conditioning.
For engineers reviewing the LM4041CEM3-1.2-T datasheet, LM4041CEM3-1.2-T pinout, LM4041CEM3-1.2-T application, or LM4041CEM3-1.2-T equivalent, key selection criteria include guaranteed extended-temperature performance, no-output-capacitor stability, low 20µVRMS noise (10Hz–10kHz), and compatibility with high-impedance bias networks in portable analog front-ends.
Technical Context
The LM4041CEM3-1.2-T implements a bandgap-based shunt reference architecture that maintains a stable 1.225V reverse breakdown voltage across its anode and cathode terminals when biased with 60µA–12mA of reverse current. It behaves electrically like a precision zener diode with low dynamic impedance (≤8Ω at 1mA) and tolerates any capacitive load without oscillation.
Its BiCMOS process enables laser-trimmed resistor matching for 0.5% initial accuracy and ensures long-term stability of ≤120ppm over 1000 hours. The device operates without external compensation and delivers consistent regulation across its full -40°C to +125°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V fixed reverse breakdown voltage-sets precise reference level for ADCs, DACs, and comparators. |
| Initial Accuracy | ±0.5% at +25°C-guarantees output stays within ±6.13mV of nominal, enabling high-resolution measurement systems. |
| Temp Coefficient | 100ppm/°C max-limits drift to ±12.25mV over full -40°C to +125°C range, critical for unheated field instruments. |
| Operating Current | 60µA to 12mA-supports ultra-low-power sensor nodes and higher-current analog monitoring circuits. |
| Noise (10Hz–10kHz) | 20µVRMS-minimizes added uncertainty in precision 16-bit+ data acquisition paths. |
| Dynamic Impedance | ≤8Ω at 1mA-ensures minimal voltage shift under varying load transients in closed-loop feedback designs. |
Pinout & Package
LM4041CEM3-1.2-T uses the industry-standard 3-pin SOT23-3 surface-mount package (1.7mm × 2.9mm × 1.3mm), optimized for high-density PCB layouts in portable and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode | Positive terminal of shunt reference; connects to system ground or low-impedance return path in bias network. |
| 2 (−) | Cathode | Negative terminal; carries regulated 1.225V output referenced to anode; sinks shunt current into supply rail. |
| 3 (N.C.) | No-connect | Must be left floating or tied to pin 2; not internally connected-prevents parasitic coupling in high-EMI environments. |
Key Features
| Feature | Design Value |
|---|---|
| Extended Temperature Range | Rated for continuous operation from -40°C to +125°C-enables deployment in automotive engine bays and industrial PLC I/O modules. |
| No Output Capacitor Required | Stable with any capacitive load up to 10µF-eliminates BOM cost and layout area for decoupling caps in space-constrained designs. |
| Low Quiescent Current | 60µA minimum operating current-supports always-on battery-backed sensors with multi-year shelf life. |
| High Shunt Current Capability | Up to 12mA sink capability-allows direct interface with op-amp feedback networks and digital reference inputs without external buffering. |
Applications
| Portable Medical Sensors | Industrial 4–20mA Transmitters |
|---|---|
Use Scenario: Battery-powered pulse oximeter with analog front-end amplifying weak photodiode signals before 16-bit ADC conversion. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for ADC and op-amp biasing, ensuring accurate ratiometric measurement independent of battery voltage decay. Use Value: 0.5% initial accuracy and 100ppm/°C tempco maintain <0.1% total error over medical operating temperature range, meeting IEC 60601-1 calibration requirements. | Use Scenario: Loop-powered 4–20mA current transmitter in hazardous-area process control, operating continuously at ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Supplies precision reference for current-sense amplifier and DAC in HART-enabled transmitter ICs. Use Value: Guaranteed -40°C to +125°C operation and 20µVRMS noise ensure stable loop calibration across wide environmental swings without recalibration. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: DIN-rail mounted electricity meter with metrology-grade ADC measuring voltage and current waveforms. IC Role / Device Role / Timing Role: Serves as primary voltage reference for dual-channel sigma-delta ADCs performing Class 0.2 energy measurement. Use Value: Laser-trimmed accuracy and ≤120ppm long-term drift over 1000h support 20-year metrological stability without field recalibration. | Use Scenario: Under-hood BCM managing window lift, seat position, and lighting functions with CAN communication. IC Role / Device Role / Timing Role: References analog comparators and voltage monitors detecting battery undervoltage and alternator regulation faults. Use Value: SOT23-3 package withstands reflow and thermal cycling; 125°C rating matches under-hood ambient limits while maintaining 1.225V reference integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C12IDBZR | 1.2V output, ±0.5% accuracy, SOIC-3 package, 100ppm/°C tempco, but requires ≥70µA min current and has higher 40µVRMS noise. | SOIC-3 footprint increases board area by 3× vs. SOT23-3; less suitable for ultra-compact portable designs. | Select TL4050C12IDBZR only if SOIC-3 assembly infrastructure exists and noise budget allows 2× higher RMS noise. |
| ADR3412ARJZ-R7 | 1.2V output, ±0.1% accuracy, SC70-3 package, 30ppm/°C tempco, but rated only to +105°C and requires 100µA min current. | Lacks extended-temperature qualification; unsuitable for industrial or automotive under-hood use cases requiring +125°C operation. | Choose ADR3412ARJZ-R7 only for commercial-grade applications where tighter initial accuracy outweighs temperature range limitation. |
Compared with TL4050C12IDBZR and ADR3412ARJZ-R7, LM4041CEM3-1.2-T uniquely balances SOT23-3 compactness, +125°C rating, and 60µA minimum current-making it optimal for space- and temperature-constrained industrial and automotive analog subsystems where moderate accuracy suffices.
Availability
LM4041CEM3-1.2-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial 4–20mA transmitters, and smart energy meters requiring stable component supply across long production lifecycles and extended temperature ranges.
Supply support for LM4041CEM3-1.2-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 industrial, automotive, communications, and computing applications.
The LM4041 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-reliability systems needing stable 1.225V references across extended temperature ranges.
FAQ
What is the guaranteed operating temperature range for LM4041CEM3-1.2-T?
The LM4041CEM3-1.2-T is fully specified and guaranteed over -40°C to +125°C. This extended temperature range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet, making it suitable for under-hood automotive and industrial control applications where ambient temperatures exceed +85°C.
Does LM4041CEM3-1.2-T require an external output capacitor for stability?
No, LM4041CEM3-1.2-T does not require an external output capacitor. Its internal design ensures unconditional stability with any capacitive load-from 0pF up to 10µF-as verified in the Typical Operating Characteristics (Figure LM4041-08). This eliminates BOM cost and layout complexity in compact designs.
What is the minimum shunt current required for proper regulation of LM4041CEM3-1.2-T?
The LM4041CEM3-1.2-T requires a minimum shunt current of 60µA to maintain regulation, as specified in the Electrical Characteristics table under "Minimum Operating Current (IRMIN)" for the C grade. Below this threshold, output voltage may deviate beyond guaranteed tolerance bands.
How does the pin configuration of LM4041CEM3-1.2-T differ from standard zener diodes?
LM4041CEM3-1.2-T uses a 3-pin SOT23-3 package with dedicated anode (+), cathode (−), and no-connect (N.C.) terminals. Unlike two-terminal zeners, pin 3 must remain unconnected or tied to pin 2-its presence improves thermal and noise performance but adds no electrical function, distinguishing it from legacy discrete solutions.
What is the long-term stability specification for LM4041CEM3-1.2-T?
The LM4041CEM3-1.2-T exhibits ≤120ppm reverse breakdown voltage change after 1000 hours of operation at 100µA bias current and +25°C, as documented in the Electrical Characteristics table under "Reverse Breakdown Voltage Long-Term Stability." This supports calibration retention in field-deployed instrumentation.
LM4041CEM3-1.2-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CEM3-1.2-T FAQ
1.How can I place an order for LM4041CEM3-1.2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CEM3-1.2-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 LM4041CEM3-1.2-T reliable?
The price and inventory of LM4041CEM3-1.2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CEM3-1.2-T is usually 5 days.
3.What payment methods are accepted for LM4041CEM3-1.2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CEM3-1.2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CEM3-1.2-T?
LM4041CEM3-1.2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CEM3-1.2-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 LM4041CEM3-1.2-T?
For technical support, including LM4041CEM3-1.2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CEM3-1.2-T requirements.
6.How does Aetrix verify that LM4041CEM3-1.2-T is sourced from the original manufacturer or authorized distributors?
All LM4041CEM3-1.2-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 LM4041CEM3-1.2-T meets industry standards.
7.What is the process for return or replacement of LM4041CEM3-1.2-T?
All LM4041CEM3-1.2-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CEM3-1.2-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 LM4041CEM3-1.2-T part is unused and in its original packaging.
Return procedure for LM4041CEM3-1.2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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