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Analog Devices Inc./Maxim Integrated LM4041BIX3-1.2-T
- Part No.:
- LM4041BIX3-1.2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4041BIX3-1.2-T.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,602
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Product details
Overview
LM4041BIX3-1.2-T from Maxim Integrated is a precision two-terminal shunt voltage reference with 1.225V fixed reverse breakdown voltage, ±0.2% initial accuracy, 100ppm/°C max temperature coefficient, and 60µA–12mA operating current range-designed for space-constrained battery-powered systems requiring stable low-voltage reference.
For engineers reviewing the LM4041BIX3-1.2-T datasheet, LM4041BIX3-1.2-T pinout, LM4041BIX3-1.2-T application, or LM4041BIX3-1.2-T equivalent, this page delivers verified package mapping (SC70-3), terminal roles, real-world load-transient behavior, noise performance (20µVRMS, 10Hz–10kHz), and validated alternatives for portable and industrial reference design.
Technical Context
The LM4041BIX3-1.2-T implements a bandgap-based shunt architecture that maintains 1.225V across its terminals under reverse bias, behaving electrically like a precision zener diode. It operates without external stabilization capacitors and tolerates any capacitive load while delivering stable regulation from 60µA to 12mA.
Its BiCMOS process enables low dynamic impedance (≤1.5Ω at 1mA/120Hz) and wideband output noise of 20µVRMS (10Hz–10kHz). Temperature drift is bounded by ±100ppm/°C over –40°C to +85°C, with long-term stability of 120ppm after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V fixed reverse breakdown voltage - sets precise reference level for ADCs, DACs, and comparators. |
| Initial Accuracy | ±0.2% at +25°C - ensures ≤2.45mV absolute error in 1.225V reference without calibration. |
| Tempco | 100ppm/°C max - contributes ≤±6.5mV error over –40°C to +85°C operating range. |
| Operating Current | 60µA to 12mA - supports ultra-low-power sensor nodes and high-current analog front-ends. |
| Output Noise | 20µVRMS (10Hz–10kHz) - minimizes quantization uncertainty in 12-bit+ data converters. |
| Dynamic Impedance | ≤1.5Ω at 1mA - maintains voltage stability during fast load transients up to 2.5mA/µs. |
| Temperature Range | –40°C to +85°C - qualified for commercial-grade portable and industrial control environments. |
Pinout & Package
LM4041BIX3-1.2-T is housed in a 3-pin SC70-3 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3, with exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Terminal | Connects to system ground or low-impedance return path; defines cathode-to-anode reference polarity. |
| 2 (−) | Cathode / Negative Terminal | Reference output node; sinks shunt current to maintain 1.225V across external load/resistor network. |
| 3 (N.C.) | No Connect | Must be left floating or tied to Pin 2; no internal connection-omitting this risks parametric shift in production units. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% PCB space vs. SOT23-3-critical for thin mobile and wearable designs. |
| No output capacitor required | Stable under all capacitive loads (0–1µF+) eliminates BOM cost, layout risk, and startup delay from external C. |
| Low 20µVRMS noise | Enables <12-bit effective resolution in battery-powered data loggers without post-filtering or oversampling. |
| 60µA minimum operating current | Supports micropower operation down to ~75µW total system power when paired with high-value source resistors. |
| Guaranteed stability over –40°C to +85°C | Validated performance across full commercial temperature range-no derating or margining needed for indoor equipment. |
Applications
| Portable Medical Sensors | Notebook System Monitoring |
|---|---|
Use Scenario: Reference for single-supply ECG front-end amplifiers and 12-bit SAR ADCs in disposable patch monitors. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225V bias for instrumentation amplifier common-mode setting and ADC VREF. Use Value: ±0.2% initial accuracy and 20µVRMS noise ensure ≤0.5 LSB total error at 12-bit resolution without trimming or filtering. |
Use Scenario: Voltage reference for battery fuel gauging ICs and system power rail monitors in ultrabooks. IC Role / Device Role / Timing Role: Precision shunt reference supplying VREF to coulomb counter ICs and PMIC ADC channels. Use Value: 60µA–12mA operating range accommodates both deep-sleep (µA-level) and turbo-mode (mA-level) monitoring states without re-biasing. |
| Industrial 4–20mA Transmitters | Smart Energy Meters |
Use Scenario: Reference for loop-powered 4–20mA transmitter DACs operating from 12–36V supply rails. IC Role / Device Role / Timing Role: Two-terminal shunt reference sinking current through series source resistor to generate stable 1.225V for DAC reference input. Use Value: Tolerance of any capacitive load allows direct connection to DAC REF pins without RC snubbing or stability concerns. |
Use Scenario: Reference for metrology-grade ADCs measuring voltage/current in Class 0.2 smart meters. IC Role / Device Role / Timing Role: Low-drift, low-noise shunt reference feeding isolated sigma-delta ADC reference inputs. Use Value: 100ppm/°C tempco and 120ppm long-term stability meet IEC 62053-22 accuracy requirements over 10-year field life. |
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 resistive divider); 0.5% initial accuracy; 90ppm/°C tempco; SOT23-3 package. | Requires external resistors to set 1.225V; higher minimum cathode current (80µA); less suitable for ultra-low-IQ designs. | Select when adjustable reference or higher output voltage is acceptable and board space permits SOT23-3. |
| ADR3412ARJZ-R7 | 1.2V fixed output; 0.1% initial accuracy; 30ppm/°C tempco; 65µA–10mA operating range; SOT23-3. | Lower output voltage (1.2V vs. 1.225V); tighter accuracy but narrower current range; higher cost and longer lead time. | Select when 1.2V suffices and sub-30ppm/°C drift is mandatory-e.g., precision calibration equipment. |
Compared with TLVH431ACDBVR and ADR3412ARJZ-R7, LM4041BIX3-1.2-T offers optimal balance of size (SC70-3), exact 1.225V output, 0.2% accuracy, and micropower capability-making it preferred for space- and current-constrained portable systems where 1.225V is specified.
Availability
LM4041BIX3-1.2-T is available at Aetrix Electronics and suitable for portable medical sensors, notebook system monitoring, and industrial 4–20mA transmitters requiring stable component supply, consistent lot-to-lot performance, and RoHS-compliant packaging.
Supply support for LM4041BIX3-1.2-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 optimized for space-constrained, battery-operated systems where stability, low noise, and zero-capacitor operation are critical.
FAQ
What is the guaranteed operating temperature range for LM4041BIX3-1.2-T?
The LM4041BIX3-1.2-T is specified and tested over –40°C to +85°C. This is confirmed in the Ordering Information table, where "I" suffix denotes the industrial temperature grade. The device maintains ±0.2% initial accuracy and 100ppm/°C tempco across this full range, with no derating required for typical PCB layouts.
Does LM4041BIX3-1.2-T require an external output capacitor for stability?
No, LM4041BIX3-1.2-T does not require an external output capacitor. Its internal design ensures stability with any capacitive load-from 0pF to ≥1µF-as explicitly stated in the General Description and Applications Information sections. This eliminates layout sensitivity and reduces BOM count.
What is the function of Pin 3 on LM4041BIX3-1.2-T?
Pin 3 on LM4041BIX3-1.2-T is labeled N.C. (No Connect) and must be left floating or tied directly to Pin 2 (cathode). The Pin Description section confirms it has no internal connection; connecting it elsewhere may cause parametric shifts or failure to meet datasheet specifications.
How does the 1.225V output voltage of LM4041BIX3-1.2-T compare to similar shunt references?
The LM4041BIX3-1.2-T provides a precise 1.225V reverse breakdown voltage-distinct from common 1.2V or 2.5V references. This value matches the bandgap voltage of silicon at 25°C and is laser-trimmed for accuracy, enabling direct use in systems designed for that exact reference point without resistor scaling.
What is the maximum shunt current LM4041BIX3-1.2-T can safely handle?
LM4041BIX3-1.2-T supports up to 12mA of continuous shunt current while maintaining regulation. Absolute Maximum Ratings specify 20mA as the damage threshold, but sustained operation above 12mA violates the Electrical Characteristics conditions and risks exceeding thermal limits-especially in the SC70-3 package's 174mW power dissipation limit at +70°C.
LM4041BIX3-1.2-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- 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:
- SC-70-3
LM4041BIX3-1.2-T FAQ
1.How can I place an order for LM4041BIX3-1.2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041BIX3-1.2-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 LM4041BIX3-1.2-T reliable?
The price and inventory of LM4041BIX3-1.2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041BIX3-1.2-T is usually 5 days.
3.What payment methods are accepted for LM4041BIX3-1.2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041BIX3-1.2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041BIX3-1.2-T?
LM4041BIX3-1.2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041BIX3-1.2-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 LM4041BIX3-1.2-T?
For technical support, including LM4041BIX3-1.2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041BIX3-1.2-T requirements.
6.How does Aetrix verify that LM4041BIX3-1.2-T is sourced from the original manufacturer or authorized distributors?
All LM4041BIX3-1.2-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 LM4041BIX3-1.2-T meets industry standards.
7.What is the process for return or replacement of LM4041BIX3-1.2-T?
All LM4041BIX3-1.2-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041BIX3-1.2-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 LM4041BIX3-1.2-T part is unused and in its original packaging.
Return procedure for LM4041BIX3-1.2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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