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Analog Devices Inc./Maxim Integrated LM4040AIX3-3.0
- Part No.:
- LM4040AIX3-3.0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040AIX3-3.0.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:366
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Product details
Overview
LM4040AIX3-3.0 from Maxim Integrated is a precision 3.000V two-terminal shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +85°C, and 60µA–15mA operating current range. It delivers stable reverse breakdown voltage for ADC/DAC biasing, portable power monitoring, and battery management circuits.
For engineers reviewing the LM4040AIX3-3.0 datasheet, LM4040AIX3-3.0 pinout, LM4040AIX3-3.0 application, or LM4040AIX3-3.0 equivalent, this page provides verified specifications, validated pin functions, confirmed SC70-3 package mapping, real-world use scenarios, and two rigorously cross-checked alternative parts for design-in flexibility.
Technical Context
The LM4040AIX3-3.0 implements a bandgap-based shunt reference architecture with laser-trimmed resistors for precise 3.000V output at +25°C (2.997V–3.003V tolerance). Its BiCMOS process enables low dynamic impedance (≤0.8Ω at 1mA) and stable regulation without external capacitors.
It operates as a two-terminal device: reverse-biased between cathode (Pin 1) and anode (Pin 2), with Pin 3 designated N.C. and required to be floating or tied to Pin 2. It maintains regulation across –40°C to +85°C with ≤45µV/mA current-induced drift and 45µVRMS wideband noise (10Hz–10kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V nominal; 2.997V–3.003V at +25°C - ensures <±0.1% error in 12-bit ADC reference paths. |
| Initial Accuracy | ±0.1% (Grade A) - eliminates need for system-level trimming in precision sensor interfaces. |
| Temp. Coefficient | ±15ppm/°C max - contributes ≤±0.98mV drift over full –40°C to +85°C range. |
| Operating Current | 60µA to 15mA - supports ultra-low-power IoT sensors and high-current analog front-ends. |
| Dynamic Impedance | ≤0.8Ω at 1mA - minimizes output voltage perturbation during load transients. |
| Output Noise | 45µVRMS (10Hz–10kHz) - suitable for 16-bit SAR ADCs without additional filtering. |
| Long-Term Stability | 120ppm over 1000h - guarantees reference integrity in industrial control systems. |
Pinout & Package
LM4040AIX3-3.0 is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3. Pin 3 is unconnected and must remain floating or be tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Cathode | Reverse-bias input terminal; connects to higher-potential node in shunt configuration. |
| Pin 2 (−) | Anode | Reference ground return; forms regulated 3.000V drop between Pin 1 and Pin 2. |
| Pin 3 (N.C.) | No Connection | Must be left floating or shorted to Pin 2; no internal connection - prevents parasitic leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area - enables placement in space-constrained wearables and medical patches. |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout risk of external stabilization. |
| Low quiescent current capability | 60µA minimum operating current - extends battery life in coin-cell-powered devices beyond 5 years. |
| Tolerates capacitive loads | Stable under >1µF output capacitance - supports direct coupling to LDO input or op-amp feedback networks. |
| Laser-trimmed accuracy | 0.1% initial tolerance - reduces calibration steps in production test for portable instrumentation. |
Applications
| Portable Power Monitoring | Battery Management Systems |
|---|---|
Use Scenario: Real-time voltage measurement in Bluetooth earbuds with CR2032 battery. IC Role / Device Role / Timing Role: Shunt reference providing 3.000V基准 for 12-bit ADC sampling battery voltage. Use Value: Enables ±10mV absolute voltage accuracy across –10°C to +45°C ambient, critical for state-of-charge estimation. |
Use Scenario: Cell voltage supervision in 2S Li-ion packs for power tools. IC Role / Device Role / Timing Role: Precision 3.000V reference for comparator-based overvoltage detection circuitry. Use Value: Guarantees trip point accuracy within ±15mV over temperature, preventing false shutdowns during high-load operation. |
| Industrial Sensor Signal Conditioning | Medical Diagnostic Equipment |
Use Scenario: Bridge sensor excitation and ADC reference in handheld pressure transmitters. IC Role / Device Role / Timing Role: Dual-role reference: supplies excitation current and sets ADC full-scale range. Use Value: Matches excitation and reference drift (<±15ppm/°C), eliminating common-mode error in ratiometric measurements. |
Use Scenario: ECG front-end gain calibration and ADC reference in portable patient monitors. IC Role / Device Role / Timing Role: Low-noise 3.000V reference for 16-bit delta-sigma ADC conversion. Use Value: 45µVRMS noise floor ensures ≥86dB SNR, meeting IEC 60601-2-27 clinical accuracy requirements. |
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 | Adjustable 1.24V–18V output; 0.5% initial accuracy; requires external resistor divider; SOT23-3 package. | Used where programmable reference voltage is needed; less accurate and higher tempco (±50ppm/°C) than LM4040AIX3-3.0. | Select when design requires voltage flexibility over fixed 3.000V; accept trade-off in accuracy and thermal stability. |
| MAX6003EUR+T | Fixed 3.00V output; 0.2% initial accuracy; ±20ppm/°C tempco; SC70-3 package; 50µA–10mA operating range. | Lower accuracy grade and wider tempco limit use in non-critical industrial controls; same footprint enables drop-in replacement evaluation. | Choose for cost-sensitive designs where ±0.2% and ±20ppm/°C meet system specs; verify long-term stability (150ppm/1000h) vs. LM4040AIX3-3.0's 120ppm. |
Compared with TLVH431ACDBVR and MAX6003EUR+T, LM4040AIX3-3.0 offers superior initial accuracy (0.1% vs. 0.2–0.5%), tighter temperature coefficient (±15ppm/°C vs. ±20–50ppm/°C), and broader operating current range (60µA–15mA vs. 50µA–10mA), making it optimal for high-precision, battery-constrained applications.
Availability
LM4040AIX3-3.0 is available at Aetrix Electronics and suitable for portable power monitoring, battery management systems, industrial sensor signal conditioning, and medical diagnostic equipment requiring stable component supply and guaranteed long-term availability.
Supply support for LM4040AIX3-3.0 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 demanding performance, reliability, and miniaturization requirements.
The LM4040 product line delivers micropower, high-accuracy shunt voltage references optimized for space-constrained, battery-operated, and industrial sensing applications where stability, low noise, and zero-capacitor operation are critical.
FAQ
What is the maximum operating current for LM4040AIX3-3.0?
The LM4040AIX3-3.0 supports a maximum operating current of 15mA while maintaining regulation and specified accuracy. Absolute maximum rating is 20mA, but operation above 15mA risks exceeding thermal limits and degrading long-term stability. For continuous operation, LM4040AIX3-3.0 should be biased within 60µA–15mA per its electrical characteristics table.
Can LM4040AIX3-3.0 be used without an output capacitor?
Yes, LM4040AIX3-3.0 does not require an external output capacitor for stability and remains stable with any capacitive load, including >1µF ceramic or tantalum capacitors. This eliminates BOM cost and PCB area typically needed for compensation networks - a key advantage confirmed in the LM4040AIX3-3.0 datasheet Figure 1 and Applications Information section.
What is the function of Pin 3 on LM4040AIX3-3.0?
Pin 3 of LM4040AIX3-3.0 is labeled N.C. (No Connection) and must be left floating or connected directly to Pin 2 (anode). It has no internal connection; tying it to Pin 2 avoids potential leakage paths or ESD susceptibility. This requirement is explicitly stated in the Pin Description and Top View diagrams of the LM4040AIX3-3.0 datasheet.
How does LM4040AIX3-3.0 achieve 0.1% initial accuracy?
LM4040AIX3-3.0 achieves 0.1% initial accuracy through on-chip laser trimming of precision resistors during final test. This process adjusts the bandgap reference core to deliver 2.997V–3.003V at +25°C, as verified in the Grade A electrical characteristics table. No external calibration is needed, enabling plug-and-play integration into high-accuracy systems.
Is LM4040AIX3-3.0 compatible with reflow soldering processes?
Yes, LM4040AIX3-3.0 in SC70-3 package is rated for standard lead-free reflow soldering per JEDEC J-STD-020. Its maximum lead temperature is +300°C for 10 seconds, and it supports peak reflow temperatures up to +260°C. The device's thermal characteristics and package construction ensure reliability under IPC-A-610 Class 2 and Class 3 assembly conditions.
LM4040AIX3-3.0 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040AIX3-3.0 FAQ
1.How can I place an order for LM4040AIX3-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIX3-3.0 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 LM4040AIX3-3.0 reliable?
The price and inventory of LM4040AIX3-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIX3-3.0 is usually 5 days.
3.What payment methods are accepted for LM4040AIX3-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIX3-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIX3-3.0?
LM4040AIX3-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIX3-3.0 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 LM4040AIX3-3.0?
For technical support, including LM4040AIX3-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIX3-3.0 requirements.
6.How does Aetrix verify that LM4040AIX3-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4040AIX3-3.0 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 LM4040AIX3-3.0 meets industry standards.
7.What is the process for return or replacement of LM4040AIX3-3.0?
All LM4040AIX3-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIX3-3.0, 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 LM4040AIX3-3.0 part is unused and in its original packaging.
Return procedure for LM4040AIX3-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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