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Analog Devices Inc./Maxim Integrated LM4041AEM3-1.2+T
- Part No.:
- LM4041AEM3-1.2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041AEM3-1.2+T.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
LM4041AEM3-1.2+T from Maxim Integrated is a precision two-terminal shunt voltage reference with 1.225V fixed reverse breakdown voltage, 0.1% initial accuracy, 100ppm/°C max temperature coefficient, and guaranteed operation from −40°C to +125°C in a 3-pin SOT23-3 package. It delivers stable reference voltage for ADC biasing, sensor excitation, and portable power monitoring circuits.
For engineers reviewing the LM4041AEM3-1.2+T datasheet, LM4041AEM3-1.2+T pinout, LM4041AEM3-1.2+T application, or LM4041AEM3-1.2+T equivalent, key selection criteria include guaranteed high-temp performance, micropower shunt current range (60µA–12mA), low 20µVRMS noise, and no external capacitor requirement for stability.
Technical Context
The LM4041AEM3-1.2+T implements a bandgap-based shunt architecture that maintains a precise 1.225V across its terminals when reverse-biased between 60µA and 12mA. Its BiCMOS process enables low dynamic impedance (≤1.5Ω) and tight initial tolerance without trimming external components.
Unlike series references, it operates as a two-terminal device where regulation occurs by sinking variable current through an external source resistor. It tolerates any capacitive load and exhibits ±15ppm/°C typical temperature drift over its full −40°C to +125°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V ±1.2mV at +25°C - ensures sub-0.1% absolute accuracy for high-resolution analog signal chains |
| Initial Accuracy | 0.1% max - laser-trimmed for minimal calibration overhead in production test |
| Temp Coefficient | 100ppm/°C max - guarantees ≤±12.25mV total drift over −40°C to +125°C |
| Shunt Current Range | 60µA to 12mA - supports ultra-low-power sensor nodes and higher-current reference buffering |
| Output Noise | 20µVRMS (10Hz–10kHz) - minimizes noise contribution in precision 16-bit+ ADC systems |
| Dynamic Impedance | ≤1.5Ω at 1mA - maintains voltage stability under fast load transients |
| Operating Temp | −40°C to +125°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
LM4041AEM3-1.2+T uses the industry-standard 3-pin SOT23-3 package (1.7mm × 2.9mm × 1.3mm), compatible with automated pick-and-place and reflow assembly. Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2 per datasheet requirement.
| 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 |
| 3 (N.C.) | No Connection | Must remain unconnected or shorted to Pin 2; not internally bonded - floating avoids parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.225V Reference | Eliminates need for external resistor dividers or trimming in low-voltage systems (e.g., 1.8V/2.5V rails) |
| No Output Capacitor Required | Enables direct connection to ADC REF pins or op-amp inputs without stability risk - reduces BOM count and board area |
| Capacitive Load Tolerance | Stable with >1µF ceramic or tantalum output capacitance - supports noisy supply rail decoupling without oscillation |
| Micropower Operation | 60µA minimum operating current allows use in battery-powered devices with multi-year standby life |
| High-Temp Qualified | Specified and tested over −40°C to +125°C - suitable for industrial control modules and automotive cabin electronics |
Applications
| Portable Medical Sensors | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Battery-powered glucose meter with 16-bit sigma-delta ADC requiring stable excitation for electrochemical sensor strips. IC Role / Device Role / Timing Role: Shunt voltage reference providing 1.225V bias to sensor front-end and ADC reference input. Use Value: 0.1% initial accuracy and 100ppm/°C tempco ensure <±0.5% total measurement error across operating temperature range. | Use Scenario: 4–20mA loop-powered transmitter in factory automation with wide ambient temperature swings. IC Role / Device Role / Timing Role: Precision shunt reference for DAC output scaling and current-loop calibration circuitry. Use Value: Guaranteed −40°C to +125°C operation and 20µVRMS low noise maintain 12-bit effective resolution in harsh environments. |
| Automotive Cabin Control Units | Smart Energy Meters |
Use Scenario: HVAC control module measuring thermistor and potentiometer inputs inside vehicle dashboard. IC Role / Device Role / Timing Role: Two-terminal reference sourcing stable voltage for ratiometric sensor measurements. Use Value: Micropower 60µA–12mA operation enables accurate sensing during ignition-off sleep mode without draining battery. | Use Scenario: DIN-rail mounted electricity meter with isolated ADCs measuring voltage/current waveforms. IC Role / Device Role / Timing Role: Primary reference for metrology-grade ADCs and internal calibration routines. Use Value: Laser-trimmed 0.1% accuracy and long-term stability (120ppm/1000h) support ANSI C12.20 Class 0.2 accuracy compliance. |
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 | Requires external resistors to set 1.225V; higher minimum cathode current (80µA) | Select if adjustable output or higher voltage reference needed; not drop-in for fixed 1.225V use |
| ADR3412ARJZ-R7 | 1.2V output; 0.1% initial accuracy; 30ppm/°C tempco; SOT23-5 (5-pin) | 5-pin package adds enable/control pin; lower tempco but fixed 1.2V (not 1.225V) | Choose for tighter thermal drift; verify 1.2V vs. 1.225V system margin and PCB layout compatibility |
Compared with TLVH431ACDBVR and ADR3412ARJZ-R7, the LM4041AEM3-1.2+T provides exact 1.225V output in a true 3-pin shunt configuration with no external components, making it optimal for space-constrained, fixed-voltage, high-temperature applications where pin count and simplicity are critical.
Availability
LM4041AEM3-1.2+T is available at Aetrix Electronics and suitable for industrial process controls, portable medical sensors, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041AEM3-1.2+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, and communications markets.
The LM4041 product line delivers micropower, high-accuracy shunt voltage references optimized for space-constrained, battery-operated, and high-temperature applications where three-terminal simplicity and guaranteed performance are essential.
FAQ
What is the exact output voltage tolerance of LM4041AEM3-1.2+T at +25°C?
The LM4041AEM3-1.2+T has a reverse breakdown voltage of 1.225V with a maximum initial tolerance of ±1.2mV (0.1%) at +25°C, corresponding to a range of 1.2238V to 1.2262V as specified in the Electrical Characteristics table. This tolerance is laser-trimmed and guaranteed across all units in the A-grade bin.
Does LM4041AEM3-1.2+T require an external capacitor for stability?
No, the LM4041AEM3-1.2+T does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including 0µF up to ≥10µF ceramic or electrolytic types - a key advantage over many competing shunt references.
What is the minimum operating current for LM4041AEM3-1.2+T across its full temperature range?
The LM4041AEM3-1.2+T requires a minimum shunt current of 60µA to maintain regulation across its full −40°C to +125°C operating range. This value is guaranteed and tested per the datasheet's Electrical Characteristics table under "Minimum Operating Current" for the A-grade variant.
Can Pin 3 of LM4041AEM3-1.2+T be left unconnected or must it be tied to Pin 2?
Per the official datasheet Pin Description, Pin 3 of LM4041AEM3-1.2+T is designated N.C. (No Connection) and must be left floating or connected to Pin 2 (−). It is not internally bonded; leaving it unconnected is acceptable, but connecting it to Pin 2 eliminates potential noise pickup on an unterminated pad.
Is LM4041AEM3-1.2+T qualified for automotive under-hood applications?
The LM4041AEM3-1.2+T is rated for −40°C to +125°C operation and meets the temperature requirements for many automotive cabin and under-hood locations. While not AEC-Q200 certified, its guaranteed performance across this full range and robust construction make it suitable for non-safety-critical automotive subsystems where qualification is customer-validated.
LM4041AEM3-1.2+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:
- 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+T FAQ
1.How can I place an order for LM4041AEM3-1.2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041AEM3-1.2+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 LM4041AEM3-1.2+T reliable?
The price and inventory of LM4041AEM3-1.2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041AEM3-1.2+T is usually 5 days.
3.What payment methods are accepted for LM4041AEM3-1.2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041AEM3-1.2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041AEM3-1.2+T?
LM4041AEM3-1.2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041AEM3-1.2+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 LM4041AEM3-1.2+T?
For technical support, including LM4041AEM3-1.2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041AEM3-1.2+T requirements.
6.How does Aetrix verify that LM4041AEM3-1.2+T is sourced from the original manufacturer or authorized distributors?
All LM4041AEM3-1.2+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 LM4041AEM3-1.2+T meets industry standards.
7.What is the process for return or replacement of LM4041AEM3-1.2+T?
All LM4041AEM3-1.2+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041AEM3-1.2+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 LM4041AEM3-1.2+T part is unused and in its original packaging.
Return procedure for LM4041AEM3-1.2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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