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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 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,641
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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, featuring 0.2% initial accuracy, 100ppm/°C max temperature coefficient, 60µA–12mA operating current range, and stable operation across –40°C to +85°C - used for ADC/DAC biasing and portable power monitoring.
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 criteria include guaranteed shunt current range, no-output-capacitor stability, low 20µVRMS noise (10Hz–10kHz), and thermal performance over industrial temperature range.
Technical Context
The LM4041BIM3-1.2-T implements a bandgap-based shunt reference architecture with laser-trimmed resistors for precision. It maintains a fixed 1.225V reverse breakdown voltage across its anode and cathode terminals when biased with 60µA to 12mA reverse current, behaving electrically like a high-stability zener diode.
Its internal BiCMOS process enables low dynamic impedance (≤1.5Ω at 1mA), wide capacitive load tolerance, and guaranteed stability without external output capacitance - critical for space-constrained battery-powered systems where layout simplicity and EMI robustness are prioritized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V ±2.4mV at +25°C - ensures accurate 12-bit ADC reference within ±0.2 LSB error at 3.3V full-scale. |
| Initial Accuracy | ±0.2% (max) - guarantees voltage deviation ≤±2.45mV at room temperature, enabling single-point calibration in production. |
| Temp Coefficient | 100ppm/°C (max) - limits drift to ≤±6.5mV over –40°C to +85°C, supporting stable sensor signal conditioning. |
| Operating Current | 60µA to 12mA - supports ultra-low-power sleep modes and high-current regulation without external buffering. |
| Output Noise | 20µVRMS (10Hz–10kHz) - minimizes quantization uncertainty in precision measurement front-ends. |
| Dynamic Impedance | ≤1.5Ω at 1mA - maintains <0.15mV output shift under 1mA load transients, improving PSRR in noisy supply rails. |
Pinout & Package
LM4041BIM3-1.2-T is housed in a RoHS-compliant 3-pin SOT23-3 surface-mount package (1.7mm × 2.9mm × 1.3mm), optimized for automated assembly and thermal dissipation up to 320mW at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (positive terminal) | Connects to system ground or low-impedance return path; forms reference node with Pin 2. |
| 2 (−) | Cathode (negative terminal) | Primary output node; sinks shunt current to maintain 1.225V across Pins 1–2. |
| 3 (N.C.) | No-connect terminal | Must be left floating or tied to Pin 2; no internal connection - avoids parasitic coupling in high-density layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Shunt reference topology | Enables direct connection to high-voltage supplies (>5V) without series regulator - simplifies power tree in multi-rail systems. |
| No output capacitor required | Eliminates BOM cost and board area for stabilization cap while maintaining phase margin >45° across all load capacitances. |
| Capacitive load tolerance | Stable with 0–1µF output capacitance - allows integration with local decoupling caps on mixed-signal PCBs. |
| Micropower operation | 60µA minimum operating current enables use in coin-cell applications with >10-year battery life at 100kΩ source resistance. |
Applications
| Portable Medical Sensors | Battery Fuel Gauging |
|---|---|
Use Scenario: Reference for 16-bit sigma-delta ADC measuring thermistor or strain gauge signals in handheld pulse oximeters. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225V excitation and conversion reference. Use Value: 0.2% initial accuracy and 100ppm/°C TC ensure <0.5% total measurement error across clinical operating temperatures. | Use Scenario: Precision reference for coulomb counter ICs (e.g., MAX17048) in lithium-ion battery packs for notebooks and tablets. IC Role / Device Role / Timing Role: Two-terminal shunt reference supplying stable bias to analog front-end of fuel gauge. Use Value: Micropower 60µA operation extends battery runtime; low noise prevents false state-of-charge drift during standby. |
| Industrial Data Acquisition | Smart Meter Analog Front-End |
Use Scenario: Reference for isolated 24-bit ADCs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Primary voltage reference for ratiometric sensor measurements and calibration routines. Use Value: Guaranteed –40°C to +85°C operation and ±1.2mV tempco drift support Class I, Division 2 hazardous location compliance. | Use Scenario: Reference for metrology-grade ADCs in ANSI C12.20-certified electricity meters. IC Role / Device Role / Timing Role: Shunt reference delivering stable 1.225V to anti-aliasing filter and ADC driver stages. Use Value: 20µVRMS noise and low dynamic impedance reduce harmonic distortion in active energy measurement below 0.1% error. |
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 resistor divider); 0.5% initial accuracy; 90ppm/°C TC; requires external resistors for 1.225V setup. | Not a drop-in replacement - needs redesign of feedback network; higher quiescent current (80µA min). | Select when adjustable reference or higher output voltage is needed; verify loop stability with added resistors. |
| ADR3412ARJZ-R7 | 1.2V fixed output; 0.1% initial accuracy; 30ppm/°C TC; 3-pin SOT23 package; requires 100nF bypass capacitor. | Higher precision but stricter layout requirements; not capacitor-free; limited to 10mA max shunt current. | Choose for ultra-low-drift applications where 1.2V vs. 1.225V offset is acceptable and board space allows bypass cap. |
Compared with TLVH431ACDBVR and ADR3412ARJZ-R7, the LM4041BIM3-1.2-T offers true 1.225V fixed output with zero external components, wider shunt current range, and guaranteed stability without capacitors - making it optimal for compact, low-risk designs where reference voltage matching and layout simplicity are critical.
Availability
LM4041BIM3-1.2-T is available at Aetrix Electronics and suitable for portable medical sensors, battery fuel gauging, and industrial data acquisition requiring stable component supply with consistent parametric performance and long-term lifecycle support.
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 demanding industrial, medical, and communications applications.
The LM4041 product line delivers micropower, high-accuracy shunt references for space-constrained systems where fixed 1.225V biasing, low noise, and capacitor-free stability are essential design requirements.
FAQ
What is the exact output voltage tolerance of the LM4041BIM3-1.2-T at +25°C?
The LM4041BIM3-1.2-T has a reverse breakdown voltage of 1.225V with a maximum tolerance of ±2.4mV (±0.2%) at +25°C, as specified in the Electrical Characteristics table. This corresponds to a voltage range of 1.2226V to 1.2275V under nominal test conditions (IR = 100µA). The LM4041BIM3-1.2-T achieves this via laser-trimmed internal resistors and is 100% production tested at room temperature.
Does the LM4041BIM3-1.2-T require an external output capacitor for stability?
No, the LM4041BIM3-1.2-T does not require an external output capacitor and remains stable with any capacitive load, including 0–1µF. Its internal design eliminates the need for external stabilization, reducing BOM count and PCB area. This behavior is verified across temperature and current ranges and documented in the Applications Information section. The LM4041BIM3-1.2-T maintains phase margin >45° regardless of output capacitance.
What is the minimum and maximum shunt current range for reliable operation of the LM4041BIM3-1.2-T?
The LM4041BIM3-1.2-T operates reliably across a shunt current range of 60µA to 12mA. Below 60µA, regulation degrades; above 12mA, voltage accuracy may fall outside spec, though absolute maximum rating allows 20mA briefly. The LM4041BIM3-1.2-T's low dynamic impedance ensures <0.15mV output shift across this full range, supporting both ultra-low-power and high-current configurations.
Can Pin 3 of the LM4041BIM3-1.2-T be connected to ground or left unconnected?
Pin 3 of the LM4041BIM3-1.2-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 only as a mechanical pad. Connecting Pin 3 to ground would create an unintended current path and violate the device's specified operating conditions. The LM4041BIM3-1.2-T datasheet explicitly prohibits tying Pin 3 to any potential other than Pin 2.
What is the guaranteed operating temperature range for the LM4041BIM3-1.2-T?
The LM4041BIM3-1.2-T is guaranteed over the industrial temperature range of –40°C to +85°C, as confirmed by the Ordering Information table (suffix "I" denotes this grade). All electrical specifications - including initial accuracy, temperature coefficient, and shunt current range - are fully characterized and warranted across this range. The LM4041BIM3-1.2-T uses a BiCMOS process and undergoes 100% production testing at +25°C with design guarantee for full-range operation.
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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 12 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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