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Analog Devices Inc./Maxim Integrated LM4040DIX3-4.1
- Part No.:
- LM4040DIX3-4.1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040DIX3-4.1.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:1,826
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Product details
Overview
LM4040DIX3-4.1 from Maxim Integrated is a precision two-terminal shunt voltage reference with 4.096V nominal reverse breakdown voltage, ±1.0% initial accuracy (D-grade), 150ppm/°C temperature coefficient, and operation over -40°C to +85°C. It delivers stable regulation across 50µA to 15mA shunt current and is used in ADC/DAC reference circuits, portable power monitoring, and battery management systems.
For engineers reviewing the LM4040DIX3-4.1 datasheet, LM4040DIX3-4.1 pinout, LM4040DIX3-4.1 application, or LM4040DIX3-4.1 equivalent, this page provides verified electrical parameters, SC70-3 package details, thermal stability data, noise performance (28µVRMS), and validated alternative options for precision analog design.
Technical Context
The LM4040DIX3-4.1 uses a bandgap-based shunt architecture to maintain a fixed 4.096V output under reverse bias, behaving like an ideal Zener diode with no forward conduction required. Its internal BiCMOS process enables low dynamic impedance (0.5–1.3Ω) and minimal load-transient voltage deviation.
It operates without external stabilization capacitors and tolerates any capacitive load, supporting direct integration into high-impedance sensing nodes. The device's 150ppm/°C tempco and ±41mV overtemperature tolerance (at +85°C) are specified for D-grade units in the SC70-3 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; min/max 4.055V/4.137V at +25°C (D-grade), enabling 12-bit ADC full-scale reference alignment |
| Initial Accuracy | ±1.0% (±41mV); defines maximum absolute error at room temperature before thermal drift |
| Tempco | ±150ppm/°C; contributes ≤±9.75mV error over -40°C to +85°C, critical for industrial temperature range designs |
| Shunt Current Range | 50µA to 15mA; supports micropower sensor interfaces and higher-current DAC references |
| Dynamic Impedance | 0.5–1.3Ω (1mA, 120Hz); ensures <13mV output shift across 1mA–15mA load changes |
| Wideband Noise | 28µVRMS (10Hz–10kHz); suitable for 16-bit SAR ADCs requiring low-noise reference sources |
| Long-Term Stability | 120ppm (1000h); predicts <0.012% output drift over 1 year, essential for calibration-critical instruments |
Pinout & Package
LM4040DIX3-4.1 is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3. Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Positive Terminal | Connects to system ground or low-side reference node; reverse-biased current enters here |
| Pin 2 (−) | Cathode / Negative Terminal | Connects to regulated voltage node; output voltage appears between Pin 2 and Pin 1 |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or shorted to Pin 2; not internally bonded-floating improves thermal stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves PCB space in portable and wearable electronics |
| No output capacitor required | Eliminates BOM cost and layout risk while maintaining stability with any capacitive load |
| Low 28µVRMS noise | Enables high-resolution data acquisition without additional filtering stages |
| Wide 50µA–15mA operating current | Supports both ultra-low-power sensors (<100µA) and high-accuracy DACs (>10mA) |
| Laser-trimmed bandgap core | Ensures tight 4.096V output and predictable tempco without post-assembly calibration |
Applications
| Battery Voltage Monitoring | Portable Medical Sensors |
|---|---|
Use Scenario: Measuring Li-ion cell voltage in smart battery packs with 12-bit ADC resolution. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for ADC conversion, replacing larger 3-terminal references. Use Value: Enables accurate state-of-charge estimation within ±0.5% error across -20°C to +60°C ambient. |
Use Scenario: Supplying reference voltage to analog front-end of ECG/PPG wearable sensors. IC Role / Device Role / Timing Role: Shunt reference for low-noise instrumentation amplifier gain-setting and ADC input scaling. Use Value: 28µVRMS noise prevents signal degradation in sub-µV biomedical measurements. |
| Industrial Data Acquisition | Programmable Logic Controller (PLC) Input Modules |
Use Scenario: Calibrated 4–20mA loop receiver with 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Precision shunt reference for current-to-voltage conversion and ADC reference rail. Use Value: ±150ppm/°C tempco maintains <0.1% full-scale error over -40°C to +70°C industrial operating range. |
Use Scenario: Analog input conditioning for modular PLC I/O cards handling multiple sensor types. IC Role / Device Role / Timing Role: Stable voltage reference for multiplexed sensor signal conditioning paths. Use Value: SC70-3 package allows dense placement of 16+ reference channels per 10cm² PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C41IDBZR | 4.096V, ±0.5% initial accuracy, 50ppm/°C tempco, SOT23-3 package | Higher accuracy and lower tempco; requires minimum 45µA operating current | Select when tighter long-term stability and reduced thermal drift outweigh cost sensitivity |
| REF3040AIDBZR | 4.096V, ±0.2% initial accuracy, 50ppm/°C tempco, SC70-3 package, 50µA–25mA range | Lower noise (25µVRMS), better tempco, same footprint; active quiescent current adds complexity | Choose for ultra-low-noise, high-precision applications where supply headroom permits series regulator topology |
Compared with LM4040DIX3-4.1, TL4050C41IDBZR offers superior accuracy but lacks SC70-3 size advantage, while REF3040AIDBZR matches the footprint and improves noise/tempco but introduces active bias requirements and higher cost.
Availability
LM4040DIX3-4.1 is available at Aetrix Electronics and suitable for battery voltage monitoring, portable medical sensors, industrial data acquisition, and PLC input modules requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040DIX3-4.1 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 and mixed-signal ICs for industrial, automotive, and communications markets, with emphasis on high-reliability, low-power solutions.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and thermally demanding applications where stability and small footprint are critical.
FAQ
What is the minimum operating current for LM4040DIX3-4.1?
The LM4040DIX3-4.1 requires a minimum shunt current of 50µA to maintain regulation, as specified in its Electrical Characteristics table. Below this threshold, output voltage may deviate beyond tolerance limits. This value is higher than A/B/C grades due to D-grade's wider initial tolerance and tempco, ensuring stable operation across the full -40°C to +85°C range.
Can LM4040DIX3-4.1 be used with capacitive loads?
Yes, LM4040DIX3-4.1 is explicitly designed to remain stable with any capacitive load and does not require an external output capacitor. This capability is confirmed in the Applications Information section and Typical Operating Characteristics, eliminating layout constraints associated with traditional shunt references.
What is the temperature coefficient of LM4040DIX3-4.1?
The LM4040DIX3-4.1 has a guaranteed maximum temperature coefficient of ±150ppm/°C over -40°C to +85°C. This value is higher than A/B/C grades (±100ppm/°C) and directly impacts total error budget-contributing up to ±9.75mV over the full temperature range at 4.096V nominal output.
Is LM4040DIX3-4.1 pin-compatible with other LM4040 variants?
Yes, LM4040DIX3-4.1 shares identical SC70-3 pinout (Pin 1=+, Pin 2=−, Pin 3=N.C.) with all LM4040_IX3-x.x variants. However, voltage, accuracy grade, and tempco differ-substituting with another variant requires verification of system-level voltage tolerance and thermal error margins.
What is the wideband noise specification for LM4040DIX3-4.1?
The LM4040DIX3-4.1 exhibits 28µVRMS wideband noise over 10Hz to 10kHz, measured at 100µA shunt current. This low noise level supports high-resolution analog-to-digital conversion without additional filtering, making it suitable for 16-bit SAR and sigma-delta ADC applications.
LM4040DIX3-4.1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 64µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 78 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040DIX3-4.1 FAQ
1.How can I place an order for LM4040DIX3-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIX3-4.1 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 LM4040DIX3-4.1 reliable?
The price and inventory of LM4040DIX3-4.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIX3-4.1 is usually 5 days.
3.What payment methods are accepted for LM4040DIX3-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIX3-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIX3-4.1?
LM4040DIX3-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIX3-4.1 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 LM4040DIX3-4.1?
For technical support, including LM4040DIX3-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIX3-4.1 requirements.
6.How does Aetrix verify that LM4040DIX3-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4040DIX3-4.1 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 LM4040DIX3-4.1 meets industry standards.
7.What is the process for return or replacement of LM4040DIX3-4.1?
All LM4040DIX3-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIX3-4.1, 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 LM4040DIX3-4.1 part is unused and in its original packaging.
Return procedure for LM4040DIX3-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DIX3-4.1 Tags
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