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Analog Devices Inc./Maxim Integrated LM4041DIM3-1.2-T
- Part No.:
- LM4041DIM3-1.2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DIM3-1.2-T.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,718
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Product details
Overview
LM4041DIM3-1.2-T from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SOT23-3 package, rated for -40°C to +85°C operation, with 1.0% initial accuracy, 150ppm/°C max temperature coefficient, and 60µA–12mA operating current range. It serves as a stable reference in portable battery-powered systems where space and low quiescent current are critical.
For engineers reviewing the LM4041DIM3-1.2-T datasheet, LM4041DIM3-1.2-T pinout, LM4041DIM3-1.2-T application, or LM4041DIM3-1.2-T equivalent, key selection criteria include guaranteed 1.225V output tolerance over temperature, no external capacitor requirement, stability under capacitive loads, and compatibility with micropower supply rails in space-constrained designs.
Technical Context
The LM4041DIM3-1.2-T implements a bandgap-based shunt reference architecture that maintains a fixed 1.225V reverse breakdown voltage across its terminals when biased with 60µA to 12mA cathode-to-anode current. Its BiCMOS process enables low dynamic impedance (≤2.0Ω) and low wideband noise (20µVRMS, 10Hz–10kHz).
Unlike series references, it operates without input voltage regulation or dropout margin-only requiring a source resistor to set shunt current. It tolerates any output capacitance and remains stable without external compensation, simplifying design in low-power sensor nodes and ADC biasing circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V ±12mV at +25°C; defines precise reference level for ADCs, DACs, and comparators |
| Initial Accuracy | ±1.0% (max); ensures reference error ≤12.25mV at room temperature before thermal drift |
| Temp Coefficient | 150ppm/°C (max); contributes ≤15.6mV drift over full -40°C to +85°C range |
| Operating Current | 60µA to 12mA; supports ultra-low-power sleep modes and high-current precision sensing |
| Dynamic Impedance | ≤2.0Ω at 1mA; minimizes output voltage shift during load transients |
| Output Noise | 20µVRMS (10Hz–10kHz); preserves signal integrity in high-resolution measurement systems |
| Temperature Range | -40°C to +85°C; validated for commercial and industrial ambient environments |
Pinout & Package
LM4041DIM3-1.2-T uses the industry-standard 3-pin SOT23-3 surface-mount package (2.92mm × 1.3mm × 1.0mm), optimized for automated assembly and board space efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Terminal | Connected to system ground or low-impedance return path; forms reference node with Pin 2 |
| 2 (−) | Cathode / Negative Terminal | Connected to regulated supply rail via source resistor; sinks shunt current to maintain 1.225V |
| 3 (N.C.) | No Connect | Must be left floating or tied to Pin 2; no internal connection-omitting this risks undefined behavior |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.225V Output | Eliminates trimming components and reduces BOM count in compact reference designs |
| No External Capacitor Required | Reduces PCB footprint and eliminates capacitor-related aging, ESR, and layout sensitivity |
| Stable Under Capacitive Loads | Enables direct interface with ADC input caps, op-amp feedback networks, and filtering stages |
| Low 20µVRMS Noise | Supports 16-bit+ resolution measurements without additional noise filtering |
| 60µA Minimum Operating Current | Permits use in µA-level standby power domains while retaining regulation |
Applications
| Portable Medical Sensors | Notebook System Monitoring |
|---|---|
Use Scenario: Battery-powered glucose meter with 16-bit sigma-delta ADC measuring analog biosensor output. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225V reference for ADC conversion and sensor excitation. Use Value: Enables <1 LSB INL error over temperature due to ±1.0% initial accuracy and 150ppm/°C TC, meeting ISO 15197 clinical accuracy requirements. | Use Scenario: Real-time voltage monitoring of CPU core, memory, and GPU rails in ultrabook platforms. IC Role / Device Role / Timing Role: Precision reference for multi-channel voltage supervisor ICs and PMIC ADCs. Use Value: Delivers consistent threshold detection across -40°C to +85°C ambient, avoiding false brown-out triggers during thermal cycling. |
| Industrial Temperature Transmitters | Smart Energy Meters |
Use Scenario: 4–20mA loop-powered RTD transmitter operating in factory-floor enclosures up to +70°C ambient. IC Role / Device Role / Timing Role: Stable reference for excitation current generation and analog front-end gain calibration. Use Value: Maintains <0.25% total reference error over life (including 120ppm long-term drift), supporting Class A metrology compliance. | Use Scenario: Polyphase electricity meter with isolated ADCs measuring voltage and current waveforms. IC Role / Device Role / Timing Role: Primary reference for isolation amplifier inputs and metrology ADCs. Use Value: Low 20µVRMS noise prevents harmonic distortion in FFT-based energy calculations, preserving Class 0.5 accuracy. |
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, 90ppm/°C TC, SOT23-3 | Requires external resistors to set reference; not drop-in for fixed 1.225V use | Select when adjustable reference or higher output voltage is needed; verify resistor tolerance impact on accuracy |
| MAX6008AEUR+T | 1.25V output, 0.2% initial accuracy, 75ppm/°C TC, SC70-3, 50µA min current | Higher accuracy and lower TC but smaller SC70 package; different pinout (Pin 3 = NC vs. MAX6008 Pin 3 = VOUT) | Prefer for tighter accuracy budgets and space-constrained layouts; requires PCB redesign due to package and pinout mismatch |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4041DIM3-1.2-T offers fixed 1.225V operation without external components, wider shunt current range, and proven stability with capacitive loads-making it optimal for cost-sensitive, space-limited, and low-maintenance reference designs.
Availability
LM4041DIM3-1.2-T is available at Aetrix Electronics and suitable for portable medical sensors, notebook system monitoring, and industrial temperature transmitters requiring stable component supply, RoHS-compliant packaging, and guaranteed commercial-temperature performance.
Supply support for LM4041DIM3-1.2-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 computing applications.
The LM4041 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems-emphasizing low drift, low noise, and capacitor-free stability.
FAQ
What is the exact output voltage tolerance of LM4041DIM3-1.2-T at +25°C?
The LM4041DIM3-1.2-T has a nominal output voltage of 1.225V with ±1.0% initial accuracy at +25°C, corresponding to a tolerance range of 1.2128V to 1.2373V per the official Maxim datasheet. This specification applies to the D-grade variant and is verified during 100% production testing at room temperature.
Does LM4041DIM3-1.2-T require an external capacitor for stability?
No, the LM4041DIM3-1.2-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 capacitors or op-amp feedback networks-eliminating layout sensitivity and reducing bill-of-materials count.
What is the minimum operating current for LM4041DIM3-1.2-T, and why is it critical?
The LM4041DIM3-1.2-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 essential when sizing the source resistor (RS) in battery-powered applications to ensure reliable operation across voltage and load extremes.
Can LM4041DIM3-1.2-T be used in applications requiring operation beyond +85°C?
No, the LM4041DIM3-1.2-T is specified only for -40°C to +85°C operation. For extended temperature ranges up to +125°C, select the LM4041DEM3-1.2+T or LM4041DEX3-1.2+T variants-both explicitly qualified and tested across the full industrial temperature range.
How is Pin 3 configured on LM4041DIM3-1.2-T, and what happens if it's incorrectly connected?
Pin 3 of the LM4041DIM3-1.2-T is labeled N.C. (No Connect) and must either be left floating or tied directly to Pin 2 (cathode). Connecting Pin 3 to any other node-including supply rails or signal lines-may cause unpredictable regulation behavior or damage, as the pin has no internal connection and is not ESD-protected for such use.
LM4041DIM3-1.2-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:
- Obsolete
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DIM3-1.2-T FAQ
1.How can I place an order for LM4041DIM3-1.2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DIM3-1.2-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 LM4041DIM3-1.2-T reliable?
The price and inventory of LM4041DIM3-1.2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DIM3-1.2-T is usually 5 days.
3.What payment methods are accepted for LM4041DIM3-1.2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DIM3-1.2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DIM3-1.2-T?
LM4041DIM3-1.2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DIM3-1.2-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 LM4041DIM3-1.2-T?
For technical support, including LM4041DIM3-1.2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DIM3-1.2-T requirements.
6.How does Aetrix verify that LM4041DIM3-1.2-T is sourced from the original manufacturer or authorized distributors?
All LM4041DIM3-1.2-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 LM4041DIM3-1.2-T meets industry standards.
7.What is the process for return or replacement of LM4041DIM3-1.2-T?
All LM4041DIM3-1.2-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DIM3-1.2-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 LM4041DIM3-1.2-T part is unused and in its original packaging.
Return procedure for LM4041DIM3-1.2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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