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Analog Devices Inc./Maxim Integrated LM4041AEM3-1.2+
- Part No.:
- LM4041AEM3-1.2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041AEM3-1.2+.pdf
- Description:
- LM4041 IMPROVED PRECISION MICROP
- Quantity:
- Payment:
- Shipping:
Inventory:1,285
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Product details
Overview
LM4041AEM3-1.2+ 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 0.1% initial accuracy, 100ppm/°C max temperature coefficient, and 60µA–12mA operating current range-used in high-reliability industrial sensor signal conditioning.
For engineers reviewing the LM4041AEM3-1.2+ datasheet, LM4041AEM3-1.2+ pinout, LM4041AEM3-1.2+ application, or LM4041AEM3-1.2+ equivalent, key selection criteria include guaranteed extended-temperature performance, no-output-capacitor stability, low 20µVRMS noise (10Hz–10kHz), and micropower operation down to 60µA.
Technical Context
The LM4041AEM3-1.2+ implements a bandgap-based shunt reference architecture that maintains a stable 1.225V reverse breakdown voltage across its terminals when biased with 60µA–12mA cathode-to-anode current. It behaves electrically like an ideal zener diode with negligible forward conduction below 10mA.
Its internal BiCMOS process enables low dynamic impedance (≤1.5Ω at 1mA), wide capacitive-load tolerance, and long-term stability of 120ppm over 1000 hours. Temperature drift is bounded by ±15ppm/°C typical and ±100ppm/°C maximum over -40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V fixed reverse breakdown voltage, with ±1.2mV tolerance at +25°C for A-grade accuracy. |
| Initial Accuracy | ±0.1% (±1.2mV) at +25°C-enables high-precision ADC/DAC biasing without calibration. |
| Temp Coefficient | ≤100ppm/°C over -40°C to +125°C-ensures ≤±12.3mV total drift across full operating range. |
| Operating Current | 60µA minimum to 12mA maximum-supports ultra-low-power sensor nodes and high-current reference buffering. |
| Noise (10Hz–10kHz) | 20µVRMS-minimizes contribution to system noise floor in precision measurement front-ends. |
| Dynamic Impedance | ≤1.5Ω at 1mA-maintains voltage regulation stability under fast load transients. |
| Long-Term Stability | 120ppm over 1000 hours-reduces calibration drift in sealed industrial instrumentation. |
Pinout & Package
LM4041AEM3-1.2+ uses the industry-standard 3-pin SOT23-3 package (2.92mm × 1.3mm × 1.0mm), RoHS-compliant, with top mark "FZNC".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Terminal | Connects to system ground or low-impedance return path; forms cathode-to-anode reference loop. |
| 2 (−) | Cathode / Negative Terminal | Reference output node; sinks regulated shunt current; connects to supply rail via series resistor. |
| 3 (N.C.) | No Connect | Must be left floating or tied to pin 2; no internal connection-omitting this risks parametric shift. |
Key Features
| Feature | Design Value |
|---|---|
| Extended Temperature Range | Rated for continuous operation from -40°C to +125°C-suitable for under-hood automotive and industrial control environments. |
| No Output Capacitor Required | Stable with any capacitive load up to ≥1µF-eliminates BOM cost and layout area for external stabilization. |
| Micropower Start-Up | Regulates stably from 60µA-enables use in battery-powered devices with multi-year shelf life. |
| Low Wideband Noise | 20µVRMS (10Hz–10kHz)-preserves SNR in 16-bit+ data acquisition systems without filtering overhead. |
| Laser-Trimmed Accuracy | 0.1% initial tolerance achieved via on-die laser trimming-reduces post-manufacture calibration effort. |
Applications
| Portable Medical Sensors | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Battery-powered wearable ECG monitors requiring stable reference for 24-bit delta-sigma ADCs over 10-year service life. IC Role / Device Role / Timing Role: Shunt voltage reference providing 1.225V excitation and ADC reference voltage. Use Value: 0.1% initial accuracy and 120ppm/1000h long-term stability minimize recalibration frequency and extend field maintenance intervals. | Use Scenario: 4–20mA loop-powered analog input modules operating in factory-floor cabinets at 85°C ambient. IC Role / Device Role / Timing Role: Precision shunt reference for current-to-voltage conversion and ADC biasing in isolated signal chains. Use Value: Guaranteed -40°C to +125°C operation and ≤100ppm/°C tempco ensure <±0.2% total error across full industrial temperature range. |
| Automotive Cabin Controllers | Smart Energy Meters |
Use Scenario: HVAC control units mounted near vehicle dashboards, exposed to thermal cycling between -40°C cold soak and +85°C solar load. IC Role / Device Role / Timing Role: Reference source for microcontroller ADC and sensor interface circuitry. Use Value: No-output-capacitor stability and SOT23-3 footprint simplify layout in space-constrained PCBs while maintaining AEC-Q200-compatible reliability. | Use Scenario: Revenue-grade electricity meters requiring metrology-grade voltage references compliant with IEC 62053-21 Class 0.2 accuracy. IC Role / Device Role / Timing Role: Primary shunt reference for polyphase energy measurement ASICs and anti-tampering detection circuits. Use Value: 20µVRMS low-noise performance and ±15ppm/°C typical tempco directly support sub-0.1% RMS error budgets in active energy calculation. |
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 resistors); 0.5% initial accuracy; 100ppm/°C tempco; SOT23-3 package. | Requires external resistors to set voltage; not drop-in for 1.225V fixed use; higher minimum cathode current (80µA). | Select only if system requires programmable reference voltage or dual-voltage flexibility. |
| ADR3412ARJZ-R7 | 1.2V fixed output; 0.1% accuracy; 30ppm/°C tempco; SC70-5 package; 3.6V max supply. | Lower tempco but limited to +125°C max junction; requires 3-pin configuration with separate ground; incompatible pinout. | Prefer where ultra-low tempco dominates over package size and shunt topology constraints. |
Compared with TLVH431ACDBVR and ADR3412ARJZ-R7, the LM4041AEM3-1.2+ offers true 1.225V fixed shunt operation in SOT23-3 with guaranteed -40°C to +125°C rating, no external components, and lowest system-level BOM count for dedicated 1.2V-class reference needs.
Availability
LM4041AEM3-1.2+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC analog inputs, and automotive cabin controllers requiring stable component supply with full extended-temperature qualification and RoHS compliance.
Supply support for LM4041AEM3-1.2+ 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, and communications applications.
The LM4041 product line delivers micropower, high-accuracy shunt voltage references optimized for space-constrained, extended-temperature systems where stability, low noise, and zero-output-capacitor operation are critical.
FAQ
What is the guaranteed operating temperature range for LM4041AEM3-1.2+?
The LM4041AEM3-1.2+ is fully specified and guaranteed over -40°C to +125°C ambient temperature. This extended range is confirmed in the Ordering Information table and Absolute Maximum Ratings section, distinguishing it from the -40°C to +85°C variants (e.g., LM4041AIM3-1.2+T). The device's internal BiCMOS process and thermal design enable reliable operation at the upper limit without derating.
Does LM4041AEM3-1.2+ require an external output capacitor for stability?
No, the LM4041AEM3-1.2+ does not require an external output capacitor. Its internal architecture ensures stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks. This is explicitly stated in the General Description and Applications Information sections, and verified by the "No Output Capacitors Required" feature and load-transient response curves in the datasheet.
What is the pin 3 (N.C.) connection requirement for LM4041AEM3-1.2+?
Pin 3 of the LM4041AEM3-1.2+ is designated N.C. (No Connect) and must either be left floating or connected directly to pin 2 (cathode). The datasheet explicitly warns that incorrect handling-such as tying pin 3 to VCC or leaving it unconnected in high-noise environments without grounding-can cause parametric shift or instability. This requirement is consistent across all SOT23-3 packaged LM4041 variants.
How does the 0.1% initial accuracy of LM4041AEM3-1.2+ translate to voltage tolerance at +25°C?
At +25°C, the 0.1% initial accuracy of LM4041AEM3-1.2+ corresponds to a ±1.2mV tolerance around the nominal 1.225V output, yielding a guaranteed range of 1.2238V to 1.2262V. This value is extracted directly from the Electrical Characteristics table under "LM4041A (0.1%)" row and is validated by the "Reverse Breakdown Voltage Tolerance" parameter listing ±1.2mV min/max at TA = +25°C.
Can LM4041AEM3-1.2+ be used in place of LM4041AIM3-1.2+T?
LM4041AEM3-1.2+ and LM4041AIM3-1.2+T share identical electrical specifications and SOT23-3 packaging, but differ in temperature rating: LM4041AEM3-1.2+ is rated for -40°C to +125°C, while LM4041AIM3-1.2+T is limited to -40°C to +85°C. Substitution is acceptable only if the end application operates within the lower temperature range; using LM4041AIM3-1.2+T in a +125°C environment violates specification and risks parametric failure.
LM4041AEM3-1.2+ 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:
- ±0.1%
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041AEM3-1.2+ FAQ
1.How can I place an order for LM4041AEM3-1.2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041AEM3-1.2+ 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 LM4041AEM3-1.2+ reliable?
The price and inventory of LM4041AEM3-1.2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041AEM3-1.2+ is usually 5 days.
3.What payment methods are accepted for LM4041AEM3-1.2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041AEM3-1.2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041AEM3-1.2+?
LM4041AEM3-1.2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041AEM3-1.2+ 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 LM4041AEM3-1.2+?
For technical support, including LM4041AEM3-1.2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041AEM3-1.2+ requirements.
6.How does Aetrix verify that LM4041AEM3-1.2+ is sourced from the original manufacturer or authorized distributors?
All LM4041AEM3-1.2+ 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 LM4041AEM3-1.2+ meets industry standards.
7.What is the process for return or replacement of LM4041AEM3-1.2+?
All LM4041AEM3-1.2+ units undergo pre-shipment inspection (PSI). If there is an issue with LM4041AEM3-1.2+, 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 LM4041AEM3-1.2+ part is unused and in its original packaging.
Return procedure for LM4041AEM3-1.2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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