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Analog Devices Inc./Maxim Integrated LM4041DEX3-1.2+T
- Part No.:
- LM4041DEX3-1.2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4041DEX3-1.2+T.pdf
- Description:
- IC VREF SHUNT 1.225V SC70
- Quantity:
- Payment:
- Shipping:
Inventory:2,436
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Product details
Overview
LM4041DEX3-1.2+T from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SC70-3 package, rated for -40°C to +125°C operation, with 1.0% initial accuracy, 150ppm/°C max temperature coefficient, and 60µA–12mA operating current range-used for stable biasing in portable power management circuits.
For engineers reviewing the LM4041DEX3-1.2+T datasheet, LM4041DEX3-1.2+T pinout, LM4041DEX3-1.2+T application, or LM4041DEX3-1.2+T equivalent, key selection factors include guaranteed extended-temperature performance, no-output-capacitor stability, low dynamic impedance, and micropower operation in subminiature packaging.
Technical Context
The LM4041DEX3-1.2+T implements a bandgap-based shunt reference architecture delivering a fixed 1.225V reverse breakdown voltage across its anode and cathode terminals. It operates as a two-terminal device with pin 3 (N.C.) floating or tied to pin 2, requiring only a series source resistor for regulation.
Its internal BiCMOS process enables stable output under capacitive loads without external compensation, while laser-trimmed resistors ensure factory-set accuracy. The D-grade variant trades tighter initial tolerance for higher temperature coefficient (150ppm/°C) to support cost-sensitive industrial applications across full -40°C to +125°C range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V ±12 mV at +25°C - defines precise reference level for ADCs, DACs, and comparators |
| Initial Accuracy | ±1.0% (max) - ensures reference error ≤ ±12.25 mV at room temperature before thermal drift |
| Temp Coefficient | 150 ppm/°C (max) - contributes ≤ ±15.3 mV additional error over full -40°C to +125°C range |
| Operating Current | 60 µA to 12 mA - supports ultra-low-power sensor nodes and high-current analog front-ends |
| Dynamic Impedance | 0.5 Ω to 2.0 Ω - maintains voltage stability during fast load transients up to 10 kHz |
| Output Noise | 20 µVRMS (10 Hz–10 kHz) - minimizes noise contribution in precision measurement systems |
| Long-Term Stability | 120 ppm (1000 h) - ensures reference drift remains below 0.15 mV over one year of continuous operation |
Pinout & Package
LM4041DEX3-1.2+T uses the 3-pin SC70-3 surface-mount package (1.8 mm × 1.8 mm), optimized for space-constrained PCB layouts. Pin 1 is the anode (+), pin 2 is the cathode (−), and pin 3 is no-connect (N.C.), which must be left floating or connected to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode terminal | Current enters here in forward bias; serves as reference voltage output node in shunt configuration |
| 2 (−) | Cathode terminal | Current exits here in reverse bias; forms reference ground reference point when used with external resistor |
| 3 (N.C.) | No-connect terminal | Must remain unconnected or tied to pin 2-no internal connection; omission causes no functional impact |
Key Features
| Feature | Design Value |
|---|---|
| Extended temperature grade | Rated for continuous operation from -40°C to +125°C-enables use in automotive engine control and industrial motor drives |
| No output capacitor required | Stable with any capacitive load up to 1 µF-eliminates BOM cost and layout area for decoupling caps |
| Micropower start-up | Minimum operating current of 60 µA-supports battery life extension in always-on IoT sensors |
| Low dynamic impedance | ≤2.0 Ω at 120 Hz-reduces output voltage shift during rapid load changes in data acquisition systems |
| RoHS-compliant packaging | +T suffix denotes lead-free, halogen-free SC70-3 package-meets IPC/JEDEC J-STD-020 reflow requirements |
Applications
| Battery-Powered Medical Sensors | Industrial PLC Analog Input Modules |
|---|---|
Use Scenario: Continuous glucose monitor using coin-cell battery and 16-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225V reference for ADC conversion accuracy. Use Value: Enables ±0.5 LSB INL over temperature with 60 µA quiescent current, extending battery life beyond 12 months. | Use Scenario: 4–20 mA loop-powered transmitter in factory automation cabinet. IC Role / Device Role / Timing Role: Precision shunt reference for current-sense amplifier offset calibration. Use Value: Maintains <±0.1% gain error across -40°C to +85°C ambient, meeting IEC 61000-6-2 immunity requirements. |
| Portable Test Equipment | Automotive Cabin Temperature Sensors |
Use Scenario: Handheld multimeter with dual-slope ADC and lithium-polymer battery. IC Role / Device Role / Timing Role: Low-noise reference source for autoranging voltage measurement circuitry. Use Value: 20 µVRMS broadband noise ensures <100 µV RMS measurement uncertainty in 100 mV range. | Use Scenario: HVAC control module mounted near vehicle dashboard with wide ambient swings. IC Role / Device Role / Timing Role: Stable bias reference for thermistor-to-voltage signal conditioning. Use Value: 150 ppm/°C tempco limits reference-induced error to <0.2°C over full cabin temperature range. |
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 (1.24V min), 0.5% initial accuracy, 90ppm/°C, SOT-23-3 | Requires external resistor divider for 1.225V setting; not pin-compatible | Select when adjustable output or lower tempco is prioritized over fixed 1.225V and SC70 size |
| ADR3412ARJZ-R7 | 1.2V fixed reference, 0.1% accuracy, 30ppm/°C, SOT-23-3, 100 µA min current | Higher accuracy and lower tempco but requires ≥100 µA-unsuitable for ultra-low-power designs | Select when highest precision is needed and supply can support higher minimum current |
Compared with TLVH431ACDBVR and ADR3412ARJZ-R7, the LM4041DEX3-1.2+T uniquely combines fixed 1.225V output, SC70-3 footprint, 60 µA start-up, and extended-temperature rating-making it optimal for compact, battery-operated industrial sensors where board space and low quiescent current are critical.
Availability
LM4041DEX3-1.2+T is available at Aetrix Electronics and suitable for portable medical devices, industrial process controllers, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041DEX3-1.2+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 series targets space-constrained, micropower applications needing stable voltage references-especially where extended temperature operation and minimal external components are mandatory design constraints.
FAQ
What is the exact output voltage tolerance of LM4041DEX3-1.2+T at +25°C?
The LM4041DEX3-1.2+T has a reverse breakdown voltage of 1.225V with ±1.0% initial accuracy at +25°C, corresponding to a tolerance range of 1.2128V to 1.2373V. This specification is guaranteed by 100% production testing and applies specifically to the D-grade variant in the SC70-3 package, as confirmed in the Maxim LM4041 datasheet revision 5.
Does LM4041DEX3-1.2+T require an external output capacitor for stability?
No, the LM4041DEX3-1.2+T does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including 0 µF to 1 µF, eliminating the need for decoupling capacitors in space-constrained designs. This behavior is verified across the full -40°C to +125°C temperature range and 60 µA to 12 mA operating current.
What is the maximum operating temperature range specified for LM4041DEX3-1.2+T?
The LM4041DEX3-1.2+T is specified for continuous operation from -40°C to +125°C. This extended temperature range is explicitly defined in the Ordering Information table and Absolute Maximum Ratings section of the datasheet, distinguishing it from I-grade variants limited to -40°C to +85°C. The "E" in the part number denotes this extended temperature capability.
How is pin 3 used on LM4041DEX3-1.2+T?
Pin 3 of the LM4041DEX3-1.2+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 active function. Connecting it to pin 2 is permitted and electrically identical to leaving it unconnected-both configurations meet datasheet requirements and do not affect device performance.
What is the minimum shunt current required for proper regulation of LM4041DEX3-1.2+T?
The LM4041DEX3-1.2+T requires a minimum shunt current of 60 µA to maintain regulation across its full temperature range. This value is specified in the Electrical Characteristics table under "Minimum Operating Current" for the D-grade variant and is validated at both -40°C and +125°C. Operation below 60 µA may result in loss of reference accuracy or instability.
LM4041DEX3-1.2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- 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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4041DEX3-1.2+T FAQ
1.How can I place an order for LM4041DEX3-1.2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DEX3-1.2+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 LM4041DEX3-1.2+T reliable?
The price and inventory of LM4041DEX3-1.2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DEX3-1.2+T is usually 5 days.
3.What payment methods are accepted for LM4041DEX3-1.2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DEX3-1.2+T transactions.
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LM4041DEX3-1.2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DEX3-1.2+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 LM4041DEX3-1.2+T?
For technical support, including LM4041DEX3-1.2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DEX3-1.2+T requirements.
6.How does Aetrix verify that LM4041DEX3-1.2+T is sourced from the original manufacturer or authorized distributors?
All LM4041DEX3-1.2+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 LM4041DEX3-1.2+T meets industry standards.
7.What is the process for return or replacement of LM4041DEX3-1.2+T?
All LM4041DEX3-1.2+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DEX3-1.2+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 LM4041DEX3-1.2+T part is unused and in its original packaging.
Return procedure for LM4041DEX3-1.2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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