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Analog Devices Inc./Maxim Integrated LM4041BIM3-1.2+T
- Part No.:
- LM4041BIM3-1.2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041BIM3-1.2+T.pdf
- Description:
- IC VREF SHUNT 1.225V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,295
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Product details
Overview
LM4041BIM3-1.2+T from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SOT23-3 package, offering 0.2% initial accuracy, 100ppm/°C max temperature coefficient, and stable operation from 60µA to 12mA shunt current - used for ADC/DAC biasing and sensor excitation in portable industrial instrumentation.
For engineers reviewing the LM4041BIM3-1.2+T datasheet, LM4041BIM3-1.2+T pinout, LM4041BIM3-1.2+T application, or LM4041BIM3-1.2+T equivalent, key selection factors include guaranteed -40°C to +85°C operation, no output capacitor requirement, low 20µVRMS noise (10Hz–10kHz), and compatibility with capacitive loads without instability.
Technical Context
The LM4041BIM3-1.2+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 behaves electrically like an ideal Zener diode with minimal dynamic impedance (≤1.5Ω at 1mA).
Its internal BiCMOS process enables low-noise performance (20µVRMS) and long-term stability of 120ppm over 1000 hours, while laser-trimmed resistors ensure grade-B initial accuracy. The device operates without external stabilization components and tolerates any output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V nominal; ±2.4mV tolerance at +25°C ensures tight analog signal referencing for 12-bit systems. |
| Initial Accuracy | ±0.2% (max); corresponds to ±2.45mV error at 25°C - sufficient for high-resolution data acquisition front-ends. |
| Tempco | 100ppm/°C (max); contributes ≤±6.5mV drift over -40°C to +85°C ambient range. |
| Shunt Current Range | 60µA to 12mA; supports ultra-low-power sensor nodes and high-current reference buffering without external gain stages. |
| Dynamic Impedance | ≤1.5Ω (typ at 1mA); minimizes load-induced voltage droop during transient current demands. |
| Output Noise | 20µVRMS (10Hz–10kHz); enables clean reference for precision SAR and delta-sigma ADCs. |
| Long-Term Stability | 120ppm (1000h); reduces calibration frequency in field-deployed measurement equipment. |
Pinout & Package
The LM4041BIM3-1.2+T is housed in a RoHS-compliant 3-pin SOT23-3 package (2.92mm × 1.3mm × 1.0mm), optimized for space-constrained PCB layouts in handheld and modular instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Reference Terminal | Connected to system ground or low-impedance return path; defines reference potential node. |
| 2 (−) | Cathode / Negative Reference Terminal | Connected to regulated supply rail via series resistor; sinks shunt current to maintain 1.225V drop. |
| 3 (N.C.) | No-Connect Terminal | Must be left floating or tied to pin 2; not internally bonded - avoids parasitic coupling or ESD path misrouting. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT23-3 footprint | Enables placement adjacent to ADCs or microcontrollers on dense mixed-signal PCBs without sacrificing thermal margin. |
| No output capacitor required | Eliminates BOM cost and layout area for stabilization caps; simplifies design validation for varying load capacitance. |
| Capacitive load tolerance | Stable under all output capacitance conditions - critical for driving ADC input filters or multiplexed sensor arrays. |
| Low 20µVRMS wideband noise | Preserves SNR in 16-bit+ data converters; avoids post-processing filtering overhead in battery-powered loggers. |
| Guaranteed -40°C to +85°C operation | Validated performance across commercial/industrial ambient ranges without derating or thermal monitoring. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over multi-year deployments. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for ratiometric sensor excitation and 16-bit sigma-delta ADC conversion. Use Value: 0.2% initial accuracy and 100ppm/°C tempco ensure <±0.5% total measurement error across operating temperature range without recalibration. | Use Scenario: 4–20mA loop-powered transmitters converting RTD or strain-gauge signals in factory automation. IC Role / Device Role / Timing Role: Supplies precision excitation current source and ADC reference in single-supply 3.3V designs. Use Value: 60µA minimum operating current enables operation down to 2.5V loop voltage, extending usable range of legacy control systems. |
| Medical Point-of-Care Devices | Automotive Cabin Sensors |
Use Scenario: Handheld blood glucose meters and pulse oximeters requiring FDA-grade analog accuracy and low power. IC Role / Device Role / Timing Role: References analog front-end for electrochemical sensor signal conditioning and low-noise amplification. Use Value: 20µVRMS noise floor preserves signal integrity in sub-100nA biosensor currents, directly improving diagnostic resolution. | Use Scenario: Occupancy and air quality sensors mounted near HVAC vents inside vehicle cabins. IC Role / Device Role / Timing Role: Stabilizes reference for NDIR CO₂ sensing and MEMS microphone biasing in thermally variable environments. Use Value: Guaranteed operation to +85°C ambient and 120ppm long-term stability reduce field failure rates in unventilated mounting locations. |
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; requires external resistors to set 1.225V; 2% initial accuracy; higher 200ppm/°C tempco. | Suitable only where board area allows resistor network and accuracy budget permits ±25mV error. | Select if existing design uses TLVH431 family and 1.225V is derived via feedback divider - not a direct replacement. |
| MAX6008BAUT+T | 1.25V fixed reference; 0.2% initial accuracy; 75ppm/°C tempco; SOT23-3; but 100µA min operating current. | Better tempco but higher minimum current limits use in ultra-low-power wake-up circuits (<60µA). | Prefer for new designs needing tighter thermal drift; avoid where 60µA startup threshold is mandatory. |
Compared with TLVH431ACDBVR and MAX6008BAUT+T, the LM4041BIM3-1.2+T uniquely delivers 1.225V fixed output with 0.2% accuracy, 60µA minimum current, and full capacitive-load stability - making it optimal for compact, low-power, fixed-voltage reference needs without external components.
Availability
LM4041BIM3-1.2+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical point-of-care devices requiring stable component supply and consistent parametric performance across production lots.
Supply support for LM4041BIM3-1.2+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 systems requiring high initial accuracy and low temperature drift without external compensation.
FAQ
What is the exact output voltage tolerance of LM4041BIM3-1.2+T at +25°C?
The LM4041BIM3-1.2+T has a reverse breakdown voltage of 1.225V with ±2.4mV (±0.2%) tolerance at +25°C, as specified in the Electrical Characteristics table for the B-grade variant. This tolerance remains valid across the full -40°C to +85°C operating range per the overtemperature calculation methodology defined in the datasheet.
Does LM4041BIM3-1.2+T require an external capacitor for stability?
No, the LM4041BIM3-1.2+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 long PCB traces - eliminating capacitor-related BOM cost and layout constraints.
What is the minimum shunt current needed for regulation in LM4041BIM3-1.2+T?
The LM4041BIM3-1.2+T requires a minimum shunt current of 60µA to maintain regulation. Below this threshold, the device exits its specified reverse breakdown region and output voltage deviates from 1.225V - critical for ultra-low-power sleep-mode operation in battery-powered systems.
Can pin 3 of LM4041BIM3-1.2+T be connected to ground or left floating?
Pin 3 of the LM4041BIM3-1.2+T is labeled N.C. (No Connect) and must be left floating or tied directly to pin 2 (cathode). It is not internally bonded; connecting it to ground or other potentials may introduce leakage paths or ESD vulnerability and is strictly prohibited per the Pin Description section.
Is LM4041BIM3-1.2+T qualified for automotive temperature range?
No, the LM4041BIM3-1.2+T is rated for -40°C to +85°C operation (I-grade), not the extended -40°C to +125°C (E-grade) required for under-hood automotive applications. For such use cases, the LM4041BEM3-1.2+T variant - explicitly specified for -40°C to +125°C - must be selected instead.
LM4041BIM3-1.2+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:
- 20 mA
- Tolerance:
- ±0.2%
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041BIM3-1.2+T FAQ
1.How can I place an order for LM4041BIM3-1.2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041BIM3-1.2+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 LM4041BIM3-1.2+T reliable?
The price and inventory of LM4041BIM3-1.2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041BIM3-1.2+T is usually 5 days.
3.What payment methods are accepted for LM4041BIM3-1.2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041BIM3-1.2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041BIM3-1.2+T?
LM4041BIM3-1.2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041BIM3-1.2+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 LM4041BIM3-1.2+T?
For technical support, including LM4041BIM3-1.2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041BIM3-1.2+T requirements.
6.How does Aetrix verify that LM4041BIM3-1.2+T is sourced from the original manufacturer or authorized distributors?
All LM4041BIM3-1.2+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 LM4041BIM3-1.2+T meets industry standards.
7.What is the process for return or replacement of LM4041BIM3-1.2+T?
All LM4041BIM3-1.2+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041BIM3-1.2+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 LM4041BIM3-1.2+T part is unused and in its original packaging.
Return procedure for LM4041BIM3-1.2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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