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Analog Devices Inc./Maxim Integrated LM4041DEM3-1.2-T
- Part No.:
- LM4041DEM3-1.2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DEM3-1.2-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
LM4041DEM3-1.2-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 1.0% initial accuracy, 150ppm/°C max temperature coefficient, and 60µA–12mA shunt current range-used for stable biasing in portable power management circuits.
For engineers reviewing the LM4041DEM3-1.2-T datasheet, LM4041DEM3-1.2-T pinout, LM4041DEM3-1.2-T application, or LM4041DEM3-1.2-T equivalent, key selection criteria include guaranteed extended-temperature performance, no-output-capacitor stability, low dynamic impedance, and compatibility with high-impedance sensing nodes in battery-powered systems.
Technical Context
The LM4041DEM3-1.2-T implements a bandgap-based shunt reference architecture that maintains a fixed 1.225V reverse breakdown voltage across its terminals when biased with 60µA–12mA cathode-to-anode current. It operates without external stabilization capacitors and tolerates arbitrary capacitive loads.
Its BiCMOS process enables low 20µVRMS wideband noise (10Hz–10kHz), ±15ppm/°C typical temperature coefficient, and long-term stability of 120ppm over 1000 hours-supporting precision analog signal conditioning in harsh thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V fixed reverse breakdown voltage; defines precise reference level for ADCs, DACs, and comparators. |
| Initial Accuracy | ±1.0% at +25°C; ensures reference error ≤ ±12.25mV before temperature or aging effects. |
| Temp Coefficient | 150ppm/°C max over -40°C to +125°C; contributes ≤ ±18.75mV drift across full operating range. |
| Shunt Current Range | 60µA to 12mA; supports low-power sensor biasing and high-current regulation without external components. |
| Dynamic Impedance | 0.5Ω to 2.0Ω at 120Hz; minimizes output voltage perturbation under load transients. |
| Output Noise | 20µVRMS (10Hz–10kHz); enables high-resolution measurement in precision data acquisition systems. |
| Long-Term Stability | 120ppm over 1000h; limits reference drift to <0.15mV after one thousand hours of operation. |
Pinout & Package
LM4041DEM3-1.2-T uses the industry-standard 3-pin SOT23-3 surface-mount package (1.8mm × 2.9mm × 1.1mm), optimized for space-constrained PCB layouts and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Positive terminal (anode) | Connects to regulated output node; sinks current into reference when reverse-biased. |
| 2 (−) | Negative terminal (cathode) | Reference ground return path; forms voltage drop across external source resistor. |
| 3 (N.C.) | No-connect terminal | Must be left floating or tied to pin 2; no internal connection-omitting this risks parametric deviation. |
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 10µF-eliminates BOM cost and layout area for decoupling caps in compact designs. |
| Low quiescent current capability | Regulates down to 60µA shunt current-supports ultra-low-power wake-up circuits and energy-harvesting applications. |
| High current tolerance | Handles up to 12mA shunt current without degradation-allows direct interface with op-amp feedback networks and digital logic inputs. |
| Laser-trimmed precision | Factory-trimmed resistors ensure 1.0% initial accuracy-reduces need for system-level calibration in production test. |
Applications
| Battery-Powered Sensor Nodes | Industrial Process Transmitters |
|---|---|
Use Scenario: Low-power wireless sensor node powered by coin cell, measuring temperature and humidity with 16-bit ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225V reference for ADC conversion and microcontroller VREF input. Use Value: Enables 0.01% measurement linearity over -40°C to +85°C ambient, with <1µA standby current contribution from LM4041DEM3-1.2-T. | Use Scenario: 4–20mA loop-powered pressure transmitter operating in factory-floor enclosures up to +125°C ambient. IC Role / Device Role / Timing Role: Precision shunt reference establishing accurate current-sense threshold for DAC-controlled loop driver. Use Value: Maintains ≤±0.2% total reference error across full temperature range, ensuring 0.1% pressure reading repeatability. |
| Notebook System Power Monitoring | Medical Patient Monitor Analog Front-End |
Use Scenario: Real-time battery voltage and system rail monitoring in ultrabook platform with dual-core SoC. IC Role / Device Role / Timing Role: Reference source for multi-channel voltage supervisor IC and fuel-gauge ADC. Use Value: Delivers stable 1.225V reference despite rapid load transients and PCB self-heating-no output capacitor needed. | Use Scenario: ECG front-end amplifier requiring sub-10µV offset stability and low-noise biasing for patient safety compliance. IC Role / Device Role / Timing Role: Low-noise shunt reference supplying bias voltage to instrumentation amplifier gain-setting network. Use Value: Contributes only 20µVRMS noise (10Hz–10kHz) and <0.5mV drift over 8-hour clinical session. |
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, 90ppm/°C tempco, SOT23-5 package. | Requires two external resistors for 1.225V setting; higher minimum cathode current (80µA). | Select when adjustable reference or tighter tempco is prioritized over fixed-voltage simplicity and pin count. |
| ADR3412ARJZ-R7 | Fixed 1.2V output, 0.1% initial accuracy, 30ppm/°C tempco, SOT23-5 package, 3.5µA max quiescent current. | Series topology (not shunt); requires input voltage ≥1.45V; incompatible with high-side sensing configurations. | Select when ultra-low supply current and superior tempco outweigh need for shunt topology and direct high-voltage sourcing. |
Compared with TLVH431ACDBVR and ADR3412ARJZ-R7, the LM4041DEM3-1.2-T offers true two-terminal simplicity, guaranteed -40°C to +125°C operation without derating, and zero-output-capacitor stability-making it optimal for space- and reliability-critical shunt reference roles where fixed 1.225V is acceptable.
Availability
LM4041DEM3-1.2-T is available at Aetrix Electronics and suitable for portable medical devices, industrial process transmitters, and automotive body-control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041DEM3-1.2-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 demanding industrial, automotive, and communications applications.
The LM4041DEM3-1.2-T belongs to Maxim's micropower shunt voltage reference product line, engineered specifically for space-constrained, battery-operated, and high-temperature systems needing stable, capacitor-free voltage references.
FAQ
What is the output voltage tolerance of the LM4041DEM3-1.2-T over its full operating temperature range?
The LM4041DEM3-1.2-T has a ±1.0% initial accuracy at +25°C and a maximum temperature coefficient of 150ppm/°C. Over -40°C to +125°C, its total output voltage tolerance is ±2.5%, corresponding to ±30.6mV deviation from the nominal 1.225V. This value is derived from the sum of initial error and worst-case thermal drift, as specified in Maxim's datasheet revision 5.
Can the LM4041DEM3-1.2-T operate without an external output capacitor?
Yes, the LM4041DEM3-1.2-T is explicitly designed to be stable with any capacitive load and does not require an external output capacitor. Its internal architecture ensures frequency stability across 0–10µF load capacitance, eliminating BOM cost and board space typically needed for decoupling in shunt reference designs.
What is the minimum shunt current required for regulation in the LM4041DEM3-1.2-T?
The LM4041DEM3-1.2-T requires a minimum shunt current of 60µA to maintain regulation. Below this threshold, the device exits its active reverse-breakdown region and output voltage collapses. This value is guaranteed across the full -40°C to +125°C temperature range and is critical for low-power sleep-mode circuit design.
Is pin 3 of the LM4041DEM3-1.2-T functional or optional?
Pin 3 of the LM4041DEM3-1.2-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; leaving it unconnected or tying it to pin 2 ensures correct device behavior-any other connection may cause parametric shift or failure to regulate.
How does the LM4041DEM3-1.2-T compare to the LM4041AEM3-1.2+T in terms of accuracy and temperature range?
The LM4041DEM3-1.2-T and LM4041AEM3-1.2+T share identical -40°C to +125°C temperature rating and SOT23-3 package, but differ in initial accuracy: LM4041DEM3-1.2-T is rated at ±1.0%, while LM4041AEM3-1.2+T achieves ±0.1%. Both exhibit 150ppm/°C and 100ppm/°C max tempco respectively, making the 'A' grade preferable where tighter initial tolerance is mandatory.
LM4041DEM3-1.2-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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DEM3-1.2-T FAQ
1.How can I place an order for LM4041DEM3-1.2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DEM3-1.2-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 LM4041DEM3-1.2-T reliable?
The price and inventory of LM4041DEM3-1.2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DEM3-1.2-T is usually 5 days.
3.What payment methods are accepted for LM4041DEM3-1.2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DEM3-1.2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DEM3-1.2-T?
LM4041DEM3-1.2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DEM3-1.2-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 LM4041DEM3-1.2-T?
For technical support, including LM4041DEM3-1.2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DEM3-1.2-T requirements.
6.How does Aetrix verify that LM4041DEM3-1.2-T is sourced from the original manufacturer or authorized distributors?
All LM4041DEM3-1.2-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 LM4041DEM3-1.2-T meets industry standards.
7.What is the process for return or replacement of LM4041DEM3-1.2-T?
All LM4041DEM3-1.2-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DEM3-1.2-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 LM4041DEM3-1.2-T part is unused and in its original packaging.
Return procedure for LM4041DEM3-1.2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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