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Analog Devices Inc./Maxim Integrated LM4040AIM3-4.1
- Part No.:
- LM4040AIM3-4.1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AIM3-4.1.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,771
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Product details
Overview
LM4040AIM3-4.1 from Maxim Integrated is a precision 4.096V two-terminal shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient, 60µA–15mA operating current range, and 64µVRMS wideband noise (10Hz–10kHz). It delivers stable reference voltage for ADC/DAC biasing, portable power monitoring, and industrial sensor signal conditioning.
For engineers reviewing the LM4040AIM3-4.1 datasheet, LM4040AIM3-4.1 pinout, LM4040AIM3-4.1 application, or LM4040AIM3-4.1 equivalent, key selection criteria include guaranteed -40°C to +85°C operation, no external capacitor requirement, low dynamic impedance (0.5–1.0Ω), and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4040AIM3-4.1 uses a bandgap-based shunt architecture to maintain a precise 4.096V reverse breakdown voltage across its anode–cathode terminals when biased with 60µA to 15mA shunt current. Its laser-trimmed resistor network ensures 0.1% initial tolerance at +25°C.
It operates without output capacitance stabilization and remains stable under any capacitive load. Temperature performance is characterized by ±15ppm/°C max TC 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 | 4.096V nominal; tight 4.092V–4.100V range at +25°C enables accurate 12-bit ADC full-scale reference |
| Initial Accuracy | ±0.1% (±4.1mV); supports high-resolution data acquisition without calibration |
| Temp Coefficient | ±15ppm/°C max; contributes ≤±0.98mV drift over -40°C to +85°C ambient |
| Shunt Current Range | 60µA to 15mA; accommodates ultra-low-power sensor nodes and higher-current analog front-ends |
| Dynamic Impedance | 0.5Ω typical at 1mA; minimizes output voltage shift under load transients |
| Wideband Noise | 64µVRMS (10Hz–10kHz); suitable for precision instrumentation without added filtering |
| Long-Term Stability | 120ppm (0.012%) after 1000h; ensures reference integrity in field-deployed systems |
Pinout & Package
LM4040AIM3-4.1 is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is unconnected (N.C.) and must be left floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Cathode | Reverse-biased terminal; connects to regulated supply rail or voltage divider top node |
| Pin 2 (−) | Anode | Reference ground return; sinks shunt current and defines output voltage reference point |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or shorted to pin 2; no internal function or electrical path |
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 area while ensuring stability with any capacitive load |
| Low 64µVRMS noise | Enables direct use in 12–14-bit SAR ADC references without post-filtering |
| Guaranteed operation to +85°C | Validated performance across industrial temperature range without derating |
| Laser-trimmed precision | 0.1% initial accuracy achieved via on-die trimming-no external calibration needed |
Applications
| Portable Power Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery voltage measurement in handheld medical devices using 12-bit ADCs. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for ADC full-scale input, enabling ±1 LSB accuracy. Use Value: 0.1% initial accuracy and ±15ppm/°C TC ensure <±5mV total error across battery discharge and ambient temperature shifts. | Use Scenario: Precision bridge sensor excitation and readout in factory automation transmitters. IC Role / Device Role / Timing Role: Supplies excitation voltage and reference for ratiometric measurement in 4–20mA loop-powered sensors. Use Value: Low 64µVRMS noise prevents signal-to-noise degradation; no capacitor simplifies conformal coating and high-reliability assembly. |
| Embedded Data Acquisition Systems | Energy Metering Front-Ends |
Use Scenario: Multi-channel voltage/current sampling in smart grid edge controllers. IC Role / Device Role / Timing Role: Shared reference source for simultaneous-sampling ADCs across multiple channels. Use Value: 0.5Ω dynamic impedance ensures minimal crosstalk-induced reference droop during channel switching. | Use Scenario: Reference for metrology-grade energy meter ICs (e.g., ADE78xx) requiring 4.096V compliance. IC Role / Device Role / Timing Role: Primary voltage reference for polyphase watt-hour measurement ASICs. Use Value: 120ppm long-term stability meets IEC 62053-21 Class 0.2 accuracy requirements over product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AIDBZR | Adjustable 1.24V–18V output; 0.5% initial accuracy; 90ppm/°C TC; SOT23-3 | Requires external resistors to set 4.096V; higher TC increases drift in wide-temp environments | Choose when design flexibility or cost sensitivity outweighs need for fixed 4.096V precision |
| ADR3440ARJZ-R7 | 4.096V fixed output; 0.1% accuracy; 10ppm/°C TC; SC70-5; requires 100nF bypass capacitor | Lower TC improves drift performance but adds capacitor and footprint; 5-pin vs. 3-pin layout change | Choose when ultra-low drift (<±0.5mV over temp) justifies added component and routing complexity |
Compared with TLVH431AIDBZR and ADR3440ARJZ-R7, LM4040AIM3-4.1 offers the smallest footprint, zero external components, and guaranteed 4.096V output-making it optimal for space-constrained, fixed-voltage, low-noise applications where layout simplicity and production consistency are critical.
Availability
LM4040AIM3-4.1 is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, embedded data loggers, and energy metering front-ends requiring stable component supply across extended production cycles.
Supply support for LM4040AIM3-4.1 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, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The LM4040 product line delivers micropower, high-accuracy shunt voltage references optimized for space-constrained, battery-operated, and high-reliability systems demanding stable reference performance without external components.
FAQ
What is the operating temperature range for LM4040AIM3-4.1?
The LM4040AIM3-4.1 is specified for operation from -40°C to +85°C. This grade (denoted by "I" in the part number) is validated across that full industrial temperature range, with all electrical characteristics-including 4.096V output voltage, ±0.1% initial accuracy, and ±15ppm/°C temperature coefficient-guaranteed per the datasheet.
Does LM4040AIM3-4.1 require an external output capacitor?
No, LM4040AIM3-4.1 does not require an external output capacitor for stability. It is designed to remain stable with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks. This eliminates BOM cost, PCB area, and reliability concerns associated with capacitor aging or microphonics.
What is the minimum shunt current needed for LM4040AIM3-4.1 to regulate properly?
The LM4040AIM3-4.1 requires a minimum shunt current of 60µA to maintain regulation within specification. Below this threshold, output voltage may deviate beyond the guaranteed 4.092V–4.100V range. Designers must ensure the series resistor and supply voltage combination sustains ≥60µA across all operating conditions, including worst-case low-VS and high-load scenarios.
How does the pin configuration of LM4040AIM3-4.1 differ from standard zener diodes?
LM4040AIM3-4.1 uses a three-terminal SC70 package: Pin 1 is cathode (+), Pin 2 is anode (−), and Pin 3 is N.C. (no connection). Unlike discrete zeners, Pin 3 must be left unconnected or tied to Pin 2-never driven or loaded. This configuration isolates the reference node and avoids parasitic coupling that could degrade accuracy or noise performance.
Can LM4040AIM3-4.1 be used in place of a 4.096V series voltage reference?
LM4040AIM3-4.1 is a shunt reference and cannot directly replace a series reference (e.g., REF5040) without circuit redesign. It requires a series current-limiting resistor and sinks current rather than sourcing it. However, for low-power, space-constrained applications where the shunt topology is acceptable-such as buffering a high-impedance node or biasing an op-amp-the LM4040AIM3-4.1 provides superior size, simplicity, and noise performance.
LM4040AIM3-4.1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040AIM3-4.1 FAQ
1.How can I place an order for LM4040AIM3-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIM3-4.1 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 LM4040AIM3-4.1 reliable?
The price and inventory of LM4040AIM3-4.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIM3-4.1 is usually 5 days.
3.What payment methods are accepted for LM4040AIM3-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIM3-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIM3-4.1?
LM4040AIM3-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIM3-4.1 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 LM4040AIM3-4.1?
For technical support, including LM4040AIM3-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIM3-4.1 requirements.
6.How does Aetrix verify that LM4040AIM3-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4040AIM3-4.1 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 LM4040AIM3-4.1 meets industry standards.
7.What is the process for return or replacement of LM4040AIM3-4.1?
All LM4040AIM3-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIM3-4.1, 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 LM4040AIM3-4.1 part is unused and in its original packaging.
Return procedure for LM4040AIM3-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040AIM3-4.1 Tags
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