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Analog Devices Inc./Maxim Integrated LM4041CIX3-1.2+T
- Part No.:
- LM4041CIX3-1.2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4041CIX3-1.2+T.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,998
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Product details
Overview
LM4041CIX3-1.2+T from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SC70-3 package, featuring 0.5% initial accuracy, 100ppm/°C max temperature coefficient, 60µA–12mA operating current range, and stable operation without output capacitors-used in portable battery-powered systems for ADC/DAC biasing and sensor excitation.
For engineers reviewing the LM4041CIX3-1.2+T datasheet, LM4041CIX3-1.2+T pinout, LM4041CIX3-1.2+T application, or LM4041CIX3-1.2+T equivalent, key selection criteria include guaranteed -40°C to +85°C operation, fixed 1.225V reverse breakdown, low 20µVRMS noise (10Hz–10kHz), and compatibility with capacitive loads without stability compensation.
Technical Context
The LM4041CIX3-1.2+T implements a bandgap-based shunt reference architecture, maintaining a precise 1.225V across its terminals when reverse-biased between 60µA and 12mA. Its BiCMOS process enables low dynamic impedance (≤1.5Ω at 1mA) and tight initial tolerance without external trimming components.
Unlike series references, it operates as a two-terminal device requiring only an external source resistor (RS) to set shunt current. Pin 3 is unconnected (N.C.) or tied to pin 2, eliminating third-terminal dependency while preserving stability over full temperature and load ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V fixed reverse breakdown voltage-defines reference level for precision analog circuits. |
| Initial Accuracy | ±0.5% at +25°C-ensures ≤6.13mV absolute error in 12-bit DAC reference applications. |
| Temp Coefficient | 100ppm/°C max-limits drift to ±8.58mV over -40°C to +85°C ambient range. |
| Operating Current | 60µA to 12mA-supports ultra-low-power sensor nodes and high-current industrial signal conditioning. |
| Noise (10Hz–10kHz) | 20µVRMS-enables <16-bit ENOB in precision data acquisition systems. |
| Dynamic Impedance | ≤1.5Ω at 1mA-minimizes load-induced voltage shift during transient current demands. |
| Temperature Range | -40°C to +85°C-qualified for commercial-grade portable and industrial embedded use. |
Pinout & Package
LM4041CIX3-1.2+T is housed in a 3-pin SC70-3 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3. Pin 1 is the anode (+), pin 2 is the cathode (−), and pin 3 is no-connect (N.C.)-must be left floating or tied to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode terminal | Positive reference node-connects to system ground or low-impedance return path in shunt configuration. |
| 2 (−) | Cathode terminal | Reference output node-voltage measured between pins 1 and 2 defines 1.225V regulation point. |
| 3 (N.C.) | No-connect terminal | Must remain unconnected or shorted to pin 2-no internal connection; improper handling causes undefined behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area-enables high-density PCB layouts in space-constrained handheld devices. |
| No output capacitor required | Stable under all capacitive loads-eliminates BOM cost and layout risk associated with external stabilization. |
| Low wideband noise | 20µVRMS (10Hz–10kHz)-reduces quantization uncertainty in 16-bit+ SAR ADC reference paths. |
| Wide shunt current range | 60µA minimum ensures reliable startup in micropower sleep modes; 12mA supports active-sensing phases. |
| Laser-trimmed accuracy | 0.5% initial tolerance achieved via factory laser adjustment-avoids post-assembly calibration in production. |
Applications
| Battery-Powered Sensor Nodes | Notebook System Monitoring |
|---|---|
Use Scenario: Low-power environmental sensor array powered by coin-cell battery, sampling temperature/humidity every 10 seconds. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225V excitation for bridge sensors and reference for 12-bit ADC. Use Value: 60µA minimum operating current extends battery life beyond 5 years; SC70-3 size minimizes board area per node. | Use Scenario: Real-time voltage monitoring of CPU core, memory, and GPU rails in ultrabook platform. IC Role / Device Role / Timing Role: Precision reference for multi-channel voltage supervisor IC detecting out-of-spec supply deviations. Use Value: 0.5% initial accuracy ensures ±6.13mV detection threshold integrity across thermal cycling. |
| Industrial Process Transmitters | Portable Medical Instrumentation |
Use Scenario: 4–20mA loop-powered pressure transmitter operating in harsh factory environments. IC Role / Device Role / Timing Role: Stable 1.225V reference for DAC generating loop current control signal and internal ADC measuring sensor output. Use Value: 100ppm/°C tempco maintains ≤±8.58mV error over -40°C to +85°C ambient-meets IEC 61000-6-2 immunity requirements. | Use Scenario: Handheld ECG device with analog front-end amplifying microvolt-level cardiac signals. IC Role / Device Role / Timing Role: Low-noise reference for instrumentation amplifier gain-setting and ADC reference voltage. Use Value: 20µVRMS noise prevents degradation of signal-to-noise ratio in sub-10µV input signal chains. |
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; 100ppm/°C tempco; SOT23-3 package. | Requires external resistors to set 1.225V; higher minimum cathode current (80µA); not pin-compatible. | Select when design flexibility for multiple reference voltages is needed and board space allows SOT23-3. |
| REF3012AIDBZR | 1.2V fixed output; 0.2% initial accuracy; 50ppm/°C tempco; SOT23-3 package; series topology. | Three-terminal series reference-requires separate input/output pins; higher quiescent current (45µA typical). | Select when tighter initial accuracy and lower tempco are critical, and three-terminal layout is acceptable. |
Compared with TLVH431ACDBVR and REF3012AIDBZR, the LM4041CIX3-1.2+T offers true two-terminal simplicity, guaranteed 1.225V output without external components, and smallest footprint-ideal where board area and component count are constrained.
Availability
LM4041CIX3-1.2+T is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial process transmitters, and notebook system monitoring requiring stable component supply with RoHS-compliant packaging and lead-free finish.
Supply support for LM4041CIX3-1.2+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, automotive, and computing applications.
The LM4041 product line delivers micropower shunt voltage references optimized for space-constrained, battery-sensitive systems requiring stable 1.225V references without external capacitors or trimming.
FAQ
What is the exact output voltage tolerance of LM4041CIX3-1.2+T at +25°C?
The LM4041CIX3-1.2+T has a reverse breakdown voltage of 1.225V with ±0.5% initial accuracy at +25°C, corresponding to a guaranteed range of 1.2189V to 1.2311V. This tolerance is laser-trimmed at wafer test and applies strictly under specified test conditions (IR = 100µA, TA = +25°C).
Does LM4041CIX3-1.2+T require an external capacitor for stability?
No, the LM4041CIX3-1.2+T does not require an external output capacitor and remains stable with any capacitive load. Its internal design eliminates the need for external compensation, reducing BOM count and layout complexity-confirmed across all operating currents (60µA to 12mA) and temperatures (-40°C to +85°C).
What is the maximum operating temperature range for LM4041CIX3-1.2+T?
The LM4041CIX3-1.2+T is rated for operation from -40°C to +85°C. This is indicated by the "I" suffix in the part number (LM4041CIX3-1.2+T), distinguishing it from the extended-range "E" versions qualified to +125°C.
How is pin 3 used on LM4041CIX3-1.2+T?
Pin 3 of the LM4041CIX3-1.2+T is designated N.C. (No Connect) and must either be left floating or connected directly to pin 2 (cathode). It has no internal connection; incorrect routing-such as tying to VCC or leaving unterminated without verification-may cause unpredictable regulation behavior.
What is the minimum shunt current required for LM4041CIX3-1.2+T to maintain regulation?
The LM4041CIX3-1.2+T requires a minimum shunt current of 60µA to ensure proper regulation and specified voltage accuracy across its full temperature range. Below this value, reverse breakdown voltage may deviate beyond the ±0.5% initial tolerance, especially near temperature extremes.
LM4041CIX3-1.2+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:
- 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:
- SC-70-3
LM4041CIX3-1.2+T FAQ
1.How can I place an order for LM4041CIX3-1.2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIX3-1.2+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 LM4041CIX3-1.2+T reliable?
The price and inventory of LM4041CIX3-1.2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIX3-1.2+T is usually 5 days.
3.What payment methods are accepted for LM4041CIX3-1.2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIX3-1.2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CIX3-1.2+T?
LM4041CIX3-1.2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIX3-1.2+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 LM4041CIX3-1.2+T?
For technical support, including LM4041CIX3-1.2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIX3-1.2+T requirements.
6.How does Aetrix verify that LM4041CIX3-1.2+T is sourced from the original manufacturer or authorized distributors?
All LM4041CIX3-1.2+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 LM4041CIX3-1.2+T meets industry standards.
7.What is the process for return or replacement of LM4041CIX3-1.2+T?
All LM4041CIX3-1.2+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIX3-1.2+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 LM4041CIX3-1.2+T part is unused and in its original packaging.
Return procedure for LM4041CIX3-1.2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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