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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:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:7,400
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Product details
Overview
LM4041AEM3-1.2-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 0.1% initial accuracy, 100ppm/°C max temperature coefficient, and 60µA–12mA operating current range-used in high-reliability analog sensing and ADC biasing 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 extended-temperature performance, micropower shunt regulation without output capacitors, and tight initial tolerance under varying load currents.
Technical Context
The LM4041AEM3-1.2-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 reverse current. It operates without external stabilization capacitance and tolerates any capacitive load.
Its BiCMOS process enables low dynamic impedance (≤1.5Ω at 1mA), 20µVRMS wideband noise (10Hz–10kHz), and long-term stability of 120ppm over 1000 hours-critical for precision instrumentation and battery-powered measurement systems requiring minimal drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V ±1.2mV at +25°C - defines absolute reference point for 12-bit+ ADCs and DACs |
| Initial Accuracy | ±0.1% (±1.2mV) - ensures ≤1 LSB error in 12-bit systems at room temperature |
| Temp Coefficient | ≤100ppm/°C - contributes ≤±12.5mV drift over -40°C to +125°C span |
| Operating Current | 60µA to 12mA - supports ultra-low-power sensor nodes and high-current reference buffering |
| Dynamic Impedance | ≤1.5Ω at 1mA - minimizes voltage shift during transient load changes |
| Output Noise | 20µVRMS (10Hz–10kHz) - preserves SNR in precision signal conditioning paths |
| Temperature Range | -40°C to +125°C - qualified for industrial control and automotive under-hood environments |
Pinout & Package
LM4041AEM3-1.2-T uses the industry-standard 3-pin SOT23-3 package (2.92mm × 1.3mm × 1.0mm), with pin 1 as anode (+), pin 2 as cathode (−), and pin 3 unconnected (N.C.) or tied to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode | Positive terminal of shunt reference; connects to regulated node or feedback point |
| 2 (−) | Cathode | Negative terminal; ties to system ground or return path for shunt current |
| 3 (N.C.) | No Connect | Must be left floating or shorted to pin 2-no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| 0.1% Initial Accuracy | Enables direct use in 12-bit data acquisition without calibration trimming |
| No Output Capacitor Required | Reduces BOM count and PCB area in space-constrained portable designs |
| Stable with Any Capacitive Load | Eliminates risk of oscillation when driving ADC input filters or op-amp buffers |
| 60µA Minimum Operating Current | Supports operation from high-impedance sources like resistive dividers or microcontroller GPIOs |
| 125°C Junction-Rated Operation | Permits deployment in thermally demanding industrial enclosures without derating |
Applications
| Portable Medical Sensors | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Battery-powered handheld blood glucose meter requiring stable 1.225V reference for 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing precise excitation voltage for sensor bridge and ADC reference rail. 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 ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Precision shunt reference establishing accurate current-sense threshold and DAC reference in isolated analog front-end. Use Value: Guaranteed -40°C to +125°C operation and 60µA–12mA current range enable reliable performance across full industrial temperature envelope. |
| Automotive Cabin Temperature Sensors | Smart Energy Meter Reference |
Use Scenario: NTC-based cabin temperature sensor module in automotive infotainment system with extended-temperature qualification. IC Role / Device Role / Timing Role: Stable 1.225V reference for ratiometric NTC voltage divider and microcontroller ADC sampling. Use Value: A-grade accuracy and 125°C-rated SOT23 package meet AEC-Q200 stress requirements for non-under-hood automotive applications. | Use Scenario: Class 0.5 smart electricity meter requiring metrology-grade voltage reference for energy calculation IC. IC Role / Device Role / Timing Role: Primary shunt reference supplying stable 1.225V to polyphase energy measurement SoC's internal ADC and calibration circuitry. Use Value: 120ppm long-term stability over 1000h and low 20µVRMS noise preserve meter accuracy certification 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 | Adjustable output (1.24V–18V); 0.5% initial accuracy; 100ppm/°C tempco; SOT23-5 package | Requires external resistor network for 1.225V setting; higher minimum cathode current (80µA) | Select when adjustable reference or higher voltage output is needed; not drop-in for fixed 1.225V use |
| REF3012AIDBZR | 1.2V output; 0.2% initial accuracy; 50ppm/°C tempco; SOT23-3; 50µA–25mA operating range | Slightly lower output voltage; superior tempco but lower accuracy grade than LM4041A | Prefer for tighter thermal drift budgets where 12mV offset vs. 1.225V is acceptable |
Compared with TLVH431ACDBVR and REF3012AIDBZR, the LM4041AEM3-1.2-T delivers exact 1.225V output with highest initial accuracy (0.1%) in a true 3-pin shunt configuration-ideal when fixed-voltage precision, minimal external components, and extended-temperature reliability are mandatory.
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, medical, and communications applications.
The LM4041 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-temperature systems where accuracy, stability, and simplicity are critical.
FAQ
What is the exact output voltage of the LM4041AEM3-1.2-T?
The LM4041AEM3-1.2-T provides a nominal reverse breakdown voltage of 1.225V, with a guaranteed tolerance of ±1.2mV (±0.1%) at +25°C. This value is laser-trimmed and specified across the full -40°C to +125°C operating range, making LM4041AEM3-1.2-T suitable for high-accuracy analog signal chains where absolute voltage stability is essential.
Does the 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 direct connection to ADC input filters or op-amp buffers. This eliminates BOM cost and layout complexity-key advantages of LM4041AEM3-1.2-T in compact, low-noise applications.
What is the maximum operating temperature range for the LM4041AEM3-1.2-T?
The LM4041AEM3-1.2-T is fully specified and guaranteed over -40°C to +125°C ambient temperature. This extended temperature rating applies specifically to the "E" grade (as indicated by the "E" in LM4041AEM3-1.2-T), distinguishing it from the "I" grade (-40°C to +85°C). The LM4041AEM3-1.2-T maintains all electrical specifications-including 0.1% accuracy and 100ppm/°C tempco-across this full range.
How is pin 3 used on the LM4041AEM3-1.2-T?
Pin 3 of the LM4041AEM3-1.2-T is labeled N.C. (No Connect) and must either be left floating or connected directly to pin 2 (cathode). It has no internal connection and serves no functional purpose. Incorrect routing-such as connecting pin 3 to a different net-can compromise LM4041AEM3-1.2-T performance or reliability, per Maxim's official pin description.
What is the minimum shunt current required for regulation in the LM4041AEM3-1.2-T?
The LM4041AEM3-1.2-T requires a minimum shunt current of 60µA to maintain regulation and specified output voltage accuracy. Below this threshold, the device exits its active reverse-breakdown region and output voltage drops nonlinearly. Designers must ensure the source resistor (RS) and supply voltage (VS) combination sustains ≥60µA through LM4041AEM3-1.2-T under worst-case conditions (e.g., min VS, max load current).
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:
- 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-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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