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Analog Devices Inc./Maxim Integrated LM4041CIM3-1.2+T
- Part No.:
- LM4041CIM3-1.2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CIM3-1.2+T.pdf
- Description:
- IC VREF SHUNT 1.225V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
LM4041CIM3-1.2+T from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SOT23-3 package, with 0.5% initial accuracy, 100ppm/°C max temperature coefficient, 60µA–12mA operating current range, and guaranteed operation from –40°C to +85°C-used for ADC/DAC biasing and portable power monitoring.
For engineers reviewing the LM4041CIM3-1.2+T datasheet, LM4041CIM3-1.2+T pinout, LM4041CIM3-1.2+T application, or LM4041CIM3-1.2+T equivalent, key selection criteria include shunt current compliance, thermal drift over industrial temperature range, noise performance in low-power sensor interfaces, and compatibility with capacitive loads without external stabilization.
Technical Context
The LM4041CIM3-1.2+T implements a bandgap-based shunt reference architecture delivering a fixed 1.225V reverse breakdown voltage. It operates as a two-terminal device where cathode (Pin 2) and anode (Pin 1) define the reference node, while Pin 3 is unconnected or tied to Pin 2-enabling compact placement in space-constrained layouts.
Its internal BiCMOS process ensures stable regulation across 60µA to 12mA shunt current, with dynamic impedance ≤1.5Ω at 1mA and 120Hz, and wideband output noise of 20µVRMS (10Hz–10kHz). No external capacitor is required for stability, even under varying capacitive load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V ±6.0mV at +25°C - defines precise reference point for 12-bit ADCs requiring <0.5 LSB error at 3.3V full-scale. |
| Initial Accuracy | ±0.5% (max) - guarantees reference deviation ≤±6.1mV at room temperature, enabling single-point calibration in production test. |
| Temp Coefficient | 100ppm/°C (max) - limits drift to ±6.5mV over –40°C to +85°C, supporting stable operation in battery-powered industrial sensors. |
| Shunt Current Range | 60µA to 12mA - supports ultra-low-power sleep modes and high-current precision DAC buffering without external active circuitry. |
| Output Noise | 20µVRMS (10Hz–10kHz) - minimizes quantization uncertainty in high-resolution data acquisition systems with >16-bit ENOB requirements. |
| Dynamic Impedance | ≤1.5Ω at 1mA - maintains voltage stability during fast load transients, critical for switched-capacitor charge-pump regulators. |
Pinout & Package
LM4041CIM3-1.2+T uses the industry-standard 3-pin SOT23-3 surface-mount package (2.92mm × 1.3mm × 1.0mm), optimized for automated assembly and thermal performance in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Positive Terminal | Connects to system ground or low-impedance return path; forms reference node with Pin 2. |
| Pin 2 (−) | Cathode / Negative Terminal | Reference output node; voltage measured between Pin 2 and Pin 1 is 1.225V when reverse-biased. |
| Pin 3 (N.C.) | No Connect | Must be left floating or shorted to Pin 2; no internal connection-ensures mechanical robustness without electrical impact. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT23-3 footprint | Enables placement in <2mm² board area-ideal for wearable medical sensors and ultra-thin IoT edge nodes. |
| No output capacitor required | Eliminates BOM cost and layout risk associated with capacitor selection, aging, and ESR variation in field-deployed equipment. |
| Tolerates any capacitive load | Supports direct connection to ADC input capacitors or microcontroller VREF pins without oscillation or settling delay. |
| Laser-trimmed bandgap core | Delivers production-tested 0.5% initial accuracy without post-assembly trimming-reducing test time and yield loss. |
Applications
| Battery Voltage Monitoring | Portable Medical Sensors |
|---|---|
Use Scenario: Real-time Li-ion cell voltage tracking in Bluetooth-enabled health monitors with 10-year battery life. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225V基准 for 12-bit SAR ADC measuring 0–4.2V battery range. Use Value: Enables ±0.5% full-scale accuracy across –10°C to +60°C ambient, meeting ISO 13485 traceability requirements. | Use Scenario: Low-power ECG front-end with integrated analog signal conditioning and wireless telemetry. IC Role / Device Role / Timing Role: Precision bias source for instrumentation amplifier gain-setting resistors and ADC reference input. Use Value: 20µVRMS noise ensures <1µV RMS input-referred noise floor, preserving diagnostic-grade ST-segment resolution. |
| Industrial Process Transmitters | Smart Energy Meters |
Use Scenario: 4–20mA loop-powered pressure transmitter operating continuously at 85°C ambient. IC Role / Device Role / Timing Role: Two-terminal shunt reference supplying excitation and measurement reference for bridge sensor interface. Use Value: 100ppm/°C tempco and –40°C to +85°C rating ensure ±0.1% span error stability over full industrial temperature range. | Use Scenario: DIN-rail mounted electricity meter with metrology-grade accuracy certification (IEC 62053-21 Class 0.2). IC Role / Device Role / Timing Role: Reference for polyphase energy measurement ICs requiring stable 1.225V input across supply brownouts. Use Value: 60µA minimum operating current allows continued regulation during 100ms mains dropout events without reference collapse. |
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 1.24V reference (2.5V max), 0.5% initial accuracy, 100ppm/°C, SOT23-3, but requires external resistor network for 1.225V setting. | Not suitable for fixed-voltage-only designs; adds component count and resistor tolerance error. | Select only if system already uses TLVH431 family and requires voltage programmability. |
| MAX6008AEUR+T | Fixed 1.25V shunt reference, 0.2% initial accuracy, 75ppm/°C, SC70-3, lower noise (15µVRMS), but rated only to +85°C and higher cost. | Higher precision and lower drift, but smaller package increases rework difficulty and limits thermal mass for high-current operation. | Prefer when ±0.2% accuracy and sub-20µVRMS noise are mandatory, and board space permits SC70-3 handling. |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4041CIM3-1.2+T delivers optimal balance of fixed 1.225V accuracy, SOT23-3 manufacturability, and proven stability across 60µA–12mA-making it the preferred choice for cost-sensitive, high-volume portable instrumentation.
Availability
LM4041CIM3-1.2+T is available at Aetrix Electronics and suitable for battery voltage monitoring, portable medical sensors, and industrial process transmitters requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4041CIM3-1.2+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The LM4041 product line delivers micropower shunt references optimized for space-constrained, battery-operated systems needing stable voltage references without external components or layout complexity.
FAQ
What is the exact output voltage tolerance of the LM4041CIM3-1.2+T at +25°C?
The LM4041CIM3-1.2+T has a reverse breakdown voltage of 1.225V with a maximum tolerance of ±6.0mV (±0.5%) at +25°C, as specified in the Electrical Characteristics table for the C-grade variant. This tolerance is laser-trimmed and production-tested, ensuring predictable performance without post-assembly calibration.
Can the LM4041CIM3-1.2+T operate without an external capacitor?
Yes, the LM4041CIM3-1.2+T does not require an external output capacitor for stability and remains functional with any capacitive load-including ADC input capacitance or microcontroller VREF pins-due to its internally compensated bandgap architecture and low dynamic impedance.
What is the minimum shunt current required for regulation in the LM4041CIM3-1.2+T?
The LM4041CIM3-1.2+T requires a minimum shunt current of 60µA to maintain regulation across its specified temperature range. Below this threshold, the reference voltage may deviate beyond its guaranteed accuracy, especially near temperature extremes.
Is Pin 3 of the LM4041CIM3-1.2+T electrically connected internally?
No, Pin 3 of the LM4041CIM3-1.2+T is designated N.C. (No Connect) and has no internal connection. It must be left floating or tied to Pin 2 per the datasheet; connecting it elsewhere may compromise mechanical integrity or cause unintended parasitic paths.
How does the LM4041CIM3-1.2+T perform under capacitive load transients?
The LM4041CIM3-1.2+T exhibits stable transient response under capacitive loads up to 1µF, with typical load-step recovery within 10µs for ±250µA changes at 1mA shunt current. Its low 1.5Ω dynamic impedance and absence of phase-margin sensitivity enable reliable operation without external compensation.
LM4041CIM3-1.2+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:
- 12 mA
- Tolerance:
- ±0.5%
- 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
LM4041CIM3-1.2+T FAQ
1.How can I place an order for LM4041CIM3-1.2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIM3-1.2+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 LM4041CIM3-1.2+T reliable?
The price and inventory of LM4041CIM3-1.2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIM3-1.2+T is usually 5 days.
3.What payment methods are accepted for LM4041CIM3-1.2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIM3-1.2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CIM3-1.2+T?
LM4041CIM3-1.2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIM3-1.2+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 LM4041CIM3-1.2+T?
For technical support, including LM4041CIM3-1.2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIM3-1.2+T requirements.
6.How does Aetrix verify that LM4041CIM3-1.2+T is sourced from the original manufacturer or authorized distributors?
All LM4041CIM3-1.2+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 LM4041CIM3-1.2+T meets industry standards.
7.What is the process for return or replacement of LM4041CIM3-1.2+T?
All LM4041CIM3-1.2+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIM3-1.2+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 LM4041CIM3-1.2+T part is unused and in its original packaging.
Return procedure for LM4041CIM3-1.2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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