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Analog Devices Inc./Maxim Integrated LM4041DIX3-1.2+T
- Part No.:
- LM4041DIX3-1.2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4041DIX3-1.2+T.pdf
- Description:
- IC VREF SHUNT 1.225V SC70
- Quantity:
- Payment:
- Shipping:
Inventory:2,430
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Product details
Overview
LM4041DIX3-1.2+T from Maxim Integrated is a precision two-terminal shunt voltage reference with 1.225V fixed reverse breakdown voltage, ±1.0% initial accuracy, 150ppm/°C max temperature coefficient, 60µA to 12mA operating current range, and SC70-3 package (1.8mm × 1.8mm). It serves as a stable reference in portable battery-powered systems where space and low quiescent current are critical.
For engineers reviewing the LM4041DIX3-1.2+T datasheet, LM4041DIX3-1.2+T pinout, LM4041DIX3-1.2+T application, or LM4041DIX3-1.2+T equivalent, key selection criteria include guaranteed -40°C to +85°C operation, no external capacitor requirement, low 20µVRMS noise (10Hz–10kHz), and compatibility with capacitive loads without instability.
Technical Context
The LM4041DIX3-1.2+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 (≤2.0Ω at 1mA) and stable regulation over temperature without output capacitance.
Unlike series references, it functions as a two-terminal device with terminal polarity (+ and −), requiring an external source resistor to set shunt current. Pin 3 is unconnected (N.C.) or tied to pin 2, eliminating third-terminal dependency while preserving accuracy within its grade specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V fixed reverse breakdown voltage - sets absolute reference level for ADCs, DACs, and comparators. |
| Initial Accuracy | ±1.0% at +25°C - defines maximum deviation before temperature or load effects; D-grade tolerance. |
| Temp Coefficient | 150ppm/°C max - contributes ≤±97.5mV total drift over -40°C to +85°C (ΔT = 125°C). |
| Operating Current | 60µA to 12mA - supports ultra-low-power sensor nodes and high-current analog front-ends. |
| Noise (10Hz–10kHz) | 20µVRMS - enables high-resolution measurements without added filtering in precision data acquisition. |
| Dynamic Impedance | ≤2.0Ω at 1mA - ensures minimal voltage shift under fast load transients (e.g., SAR ADC sampling bursts). |
| Temperature Range | -40°C to +85°C - validated for commercial and industrial ambient environments without derating. |
Pinout & Package
LM4041DIX3-1.2+T is housed in a 3-pin SC70-3 package (1.8mm × 1.8mm, 0.95mm height), optimized for high-density PCB layouts in portable electronics. Pin 3 is designated N.C. and must be left floating or connected to pin 2 per datasheet instruction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (positive terminal) | Reference output node - connects to load or feedback network; voltage referenced to pin 2. |
| 2 (−) | Cathode (negative terminal) | Return path for shunt current - ties to system ground or common reference plane. |
| 3 (N.C.) | No-connect terminal | Must remain unconnected or shorted to pin 2 - no internal connection; avoids parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | Reduces board area by 50% vs. SOT23-3 equivalents - critical for thin mobile devices and wearables. |
| No output capacitor required | Eliminates BOM cost and layout risk associated with stability-compensating capacitors. |
| Capacitive load tolerance | Stable with any output capacitance - simplifies interface to ADC input buffers or op-amp followers. |
| Low wideband noise | 20µVRMS (10Hz–10kHz) enables <16-bit effective resolution in precision measurement circuits. |
| Micropower operation | 60µA minimum operating current allows use in always-on battery-backed subsystems. |
Applications
| Portable Medical Sensors | Notebook Computer Power Monitoring |
|---|---|
Use Scenario: Continuous glucose monitor with coin-cell battery and 16-bit ADC. IC Role / Device Role / Timing Role: Shunt voltage reference for ADC full-scale calibration and sensor signal conditioning. Use Value: 1.225V reference enables ratiometric measurement against battery voltage; ±1.0% accuracy meets ISO 15197 clinical tolerance requirements at minimal current draw. | Use Scenario: Real-time CPU core voltage monitoring during dynamic frequency scaling. IC Role / Device Role / Timing Role: Precision reference for analog comparator detecting VRM output deviations. Use Value: Stable 1.225V threshold ensures reliable overvoltage/undervoltage detection across -40°C to +85°C ambient without recalibration. |
| Industrial Temperature Transmitters | Smartphone Battery Fuel Gauging |
Use Scenario: 4–20mA loop-powered RTD transmitter in factory automation cabinets. IC Role / Device Role / Timing Role: Reference for current-loop DAC and sensor excitation circuitry. Use Value: 150ppm/°C tempco and -40°C to +85°C rating ensure <0.2% total error over full industrial temperature span. | Use Scenario: Fuel gauge IC measuring cell voltage via integrated 12-bit ADC in LTE smartphones. IC Role / Device Role / Timing Role: Internal reference for ADC converting battery voltage to state-of-charge estimate. Use Value: SC70-3 size fits tight space near battery connector; 20µVRMS noise prevents SOC calculation jitter during RF transmission bursts. |
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 (min 1.24V), ±0.5% initial accuracy, 100ppm/°C, SOT23-3 | Requires external resistors for 1.225V setting; higher minimum cathode current (80µA) | Choose when adjustable output or tighter initial accuracy is needed, accepting added resistor BOM and layout complexity. |
| MAX6008AEUR+T | 1.25V fixed reference, ±0.2% initial accuracy, 75ppm/°C, SOT23-3, 50µA min current | Narrower tempco and better accuracy but limited to -40°C to +85°C same as LM4041DIX3-1.2+T | Choose when higher precision and lower drift are prioritized over SC70-3 size reduction and micropower capability. |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4041DIX3-1.2+T uniquely combines exact 1.225V output, SC70-3 miniaturization, and guaranteed 60µA–12mA operation without external components-making it optimal for space-constrained, single-voltage-reference designs where grade-D accuracy suffices.
Availability
LM4041DIX3-1.2+T is available at Aetrix Electronics and suitable for portable medical sensors, notebook computer power monitoring, and industrial temperature transmitters requiring stable component supply across commercial temperature ranges.
Supply support for LM4041DIX3-1.2+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 improved precision micropower shunt voltage references targeting space- and current-sensitive systems where fixed 1.225V regulation with minimal external components is essential.
FAQ
What is the output voltage tolerance of LM4041DIX3-1.2+T at +25°C?
The LM4041DIX3-1.2+T has a fixed reverse breakdown voltage of 1.225V with ±1.0% initial accuracy at +25°C, corresponding to a tolerance band of 1.2128V to 1.2373V per the datasheet's electrical characteristics table. This D-grade specification reflects its position in the LM4041 family's accuracy hierarchy and is laser-trimmed during production.
Does LM4041DIX3-1.2+T require an external capacitor for stability?
No, the LM4041DIX3-1.2+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 capacitors or op-amp feedback networks. This eliminates capacitor-related BOM cost, layout constraints, and aging concerns in long-life deployments.
What is the operating temperature range for LM4041DIX3-1.2+T?
The LM4041DIX3-1.2+T is specified for operation from -40°C to +85°C. This commercial/industrial temperature range is confirmed in the Ordering Information table and Absolute Maximum Ratings section. It is distinct from the extended-range "E" variants (e.g., LM4041DEX3-1.2+T), which operate up to +125°C.
How is pin 3 used on LM4041DIX3-1.2+T?
Pin 3 of the LM4041DIX3-1.2+T is designated N.C. (no connect) and must either be left floating or connected directly to pin 2 (cathode/−). The datasheet explicitly states this requirement in the Pin Description table and top-view diagram to prevent unintended biasing or leakage paths that could degrade reference accuracy or stability.
What is the minimum shunt current required for LM4041DIX3-1.2+T to regulate properly?
The LM4041DIX3-1.2+T requires a minimum shunt current of 60µA to maintain regulation, as specified in the Electrical Characteristics table under "Minimum Operating Current (IRMIN)". Below this threshold, the device exits its reverse-breakdown region and cannot sustain the 1.225V reference voltage, risking output collapse in low-power sleep modes.
LM4041DIX3-1.2+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:
- 20 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4041DIX3-1.2+T FAQ
1.How can I place an order for LM4041DIX3-1.2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DIX3-1.2+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 LM4041DIX3-1.2+T reliable?
The price and inventory of LM4041DIX3-1.2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DIX3-1.2+T is usually 5 days.
3.What payment methods are accepted for LM4041DIX3-1.2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DIX3-1.2+T transactions.
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4.How is shipping managed for LM4041DIX3-1.2+T?
LM4041DIX3-1.2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DIX3-1.2+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 LM4041DIX3-1.2+T?
For technical support, including LM4041DIX3-1.2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DIX3-1.2+T requirements.
6.How does Aetrix verify that LM4041DIX3-1.2+T is sourced from the original manufacturer or authorized distributors?
All LM4041DIX3-1.2+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 LM4041DIX3-1.2+T meets industry standards.
7.What is the process for return or replacement of LM4041DIX3-1.2+T?
All LM4041DIX3-1.2+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DIX3-1.2+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 LM4041DIX3-1.2+T part is unused and in its original packaging.
Return procedure for LM4041DIX3-1.2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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