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Analog Devices Inc./Maxim Integrated LM4040CIX3-5.0+T
- Part No.:
- LM4040CIX3-5.0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040CIX3-5.0+T.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,469
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Product details
Overview
LM4040CIX3-5.0+T from Maxim Integrated is a precision 5.000V two-terminal shunt voltage reference in SC70-3 package, featuring ±0.5% initial accuracy, 100ppm/°C max temperature coefficient, and stable operation from 60μA to 15mA shunt current. It delivers low 80µVRMS wideband noise (10Hz–10kHz) and supports industrial temperature range (−40°C to +125°C), ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4040CIX3-5.0+T datasheet, LM4040CIX3-5.0+T pinout, LM4040CIX3-5.0+T application, or LM4040CIX3-5.0+T equivalent, key selection criteria include guaranteed reverse breakdown voltage tolerance over full temperature range, no-output-capacitor stability, ultra-small SC70 footprint, and AEC-Q100 qualification suitability for automotive subsystems.
Technical Context
The LM4040CIX3-5.0+T implements a laser-trimmed bandgap core with dynamic impedance as low as 0.5Ω at 1mA, enabling stable regulation across wide current (60μA–15mA) and temperature (−40°C to +125°C) ranges. Its two-terminal architecture eliminates need for external capacitors while tolerating arbitrary capacitive loads.
Unlike series references, it operates as a shunt device-sinking variable current through an external series resistor to maintain precise 5.000V across its terminals. The NC pin (Pin 3) must be left unconnected or tied to cathode (Pin 2), preserving SC70-3 mechanical compatibility without functional impact.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V nominal; ±25mV (±0.5%) initial tolerance at +25°C ensures accurate system-level calibration without post-manufacture trimming. |
| Temperature Coefficient | ≤100ppm/°C over −40°C to +125°C; guarantees ≤±0.5% total voltage drift across full operating range for robust sensor signal conditioning. |
| Shunt Current Range | 60μA to 15mA; enables use with high-impedance sources (e.g., battery monitors) and high-current analog front-ends without external buffering. |
| Dynamic Impedance | 0.5Ω typical at 1mA; minimizes output voltage variation under load transients, critical for precision data acquisition systems. |
| Wideband Noise | 80µVRMS (10Hz–10kHz); low enough to avoid degrading 16-bit+ ADC effective resolution in metrology-grade designs. |
| Long-Term Stability | 120ppm after 1000h; supports >10-year field reliability in industrial control and medical equipment without recalibration. |
| Package | SC70-3 (1.8mm × 1.8mm); 50% smaller than SOT23, enabling dense PCB layouts in space-constrained portable electronics. |
Pinout & Package
Package: SC70-3 surface-mount package (1.8mm × 1.8mm), RoHS-compliant, rated for −40°C to +125°C operation. Thermal resistance θJA = 340.4°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode (positive terminal) | Connected to system ground or low-side reference node; forms cathode-to-anode reverse-bias path for regulation. |
| Pin 2 (–) | Cathode (negative terminal) | Output node where stable 5.000V appears relative to Pin 1; sinks all shunt current required for regulation. |
| Pin 3 (N.C.) | No connection | Must be left floating or tied to Pin 2; no internal connection-ensures mechanical compatibility without electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% board space vs. SOT23, critical for wearable sensors and miniaturized IoT nodes. |
| No output capacitor required | Internally compensated design remains stable with any capacitive load (0–∞), eliminating BOM cost and layout sensitivity. |
| Guaranteed −40°C to +125°C operation | Validated performance across full industrial/automotive ambient range-no derating needed for thermal design. |
| Low 80µVRMS noise | Enables direct interface to 16-bit SAR ADCs without additional filtering, reducing component count in precision measurement systems. |
| AEC-Q100 qualified variants available | LM4040CIX3-5.0+T belongs to a family qualified per AEC-Q100 Rev G, supporting functional safety requirements in automotive ECUs. |
Applications
| Portable Instrumentation | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes requiring stable 5V reference for 16-bit ADCs and DACs. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing precise 5.000V bias for analog signal chains. Use Value: ±0.5% initial accuracy and 100ppm/°C TC ensure <0.1% total error across operating temperature, eliminating field recalibration. |
Use Scenario: Remote environmental sensors powered by coin cells or Li-SOCl₂ batteries with multi-year deployment life. IC Role / Device Role / Timing Role: Low-quiescent-current (60μA min) shunt reference enabling microamp-level system sleep modes. Use Value: Stable 5.000V output down to 60μA allows continuous sensor biasing during ultra-low-power monitoring cycles. |
| Automotive Body Control Modules | Industrial Process Transmitters |
Use Scenario: HVAC actuators and lighting controllers in passenger compartments operating from 12V battery rails. IC Role / Device Role / Timing Role: AEC-Q100-compatible shunt reference supplying reference voltage to CAN/LIN interface ICs and PWM drivers. Use Value: Guaranteed −40°C to +125°C operation and 120ppm long-term stability support 15-year vehicle lifecycle without drift-related failures. |
Use Scenario: 4–20mA loop-powered pressure/temperature transmitters mounted in factory-floor enclosures. IC Role / Device Role / Timing Role: Precision 5.000V reference for sigma-delta ADCs converting sensor outputs into digital signals. Use Value: 0.5Ω dynamic impedance ensures <1mV output shift during 10mA load transients, maintaining <0.02% measurement linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | 5.0V, ±0.5%, SC70-3, 100ppm/°C, but requires ≥75μA min operating current and exhibits higher 120µVRMS noise. | Less suitable for ultra-low-power (<75μA) or low-noise (<100µVRMS) applications like battery-backed RTCs or 18-bit ADCs. | Select TL4050C50IDBZR only if legacy TI supply chain alignment is required; verify noise margin in high-resolution systems. |
| ADR3450ARJZ-R7 | 5.0V, ±0.1%, SOT23-3, 30ppm/°C, but larger footprint and 100μA min current; not SC70-compatible. | Better for metrology-grade systems needing <0.1% accuracy, but incompatible with space-constrained SC70 layouts. | Choose ADR3450ARJZ-R7 when absolute accuracy outweighs size constraints-requires PCB redesign due to SOT23-3 pad layout. |
Compared with TL4050C50IDBZR and ADR3450ARJZ-R7, LM4040CIX3-5.0+T uniquely balances SC70-3 miniaturization, 60μA minimum current, and 80µVRMS noise-making it optimal for next-generation portable and automotive modules where board area and power efficiency are co-constrained.
Availability
LM4040CIX3-5.0+T is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and automotive body control modules requiring stable component supply with guaranteed long-term availability.
Supply support for LM4040CIX3-5.0+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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets, with emphasis on precision, power efficiency, and reliability.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-sensitive, and high-accuracy applications-including portable test equipment, automotive subsystems, and industrial process controls.
FAQ
What is the guaranteed operating temperature range for LM4040CIX3-5.0+T?
The LM4040CIX3-5.0+T is specified and guaranteed over −40°C to +125°C. This extended industrial temperature range is validated per the LM4040E grade, making LM4040CIX3-5.0+T suitable for under-hood automotive and factory-floor industrial environments where ambient temperatures exceed +85°C.
Can LM4040CIX3-5.0+T operate without an external output capacitor?
Yes, LM4040CIX3-5.0+T does not require an external output capacitor and remains stable with any capacitive load-from 0pF to several µF. This eliminates capacitor-related BOM cost, layout sensitivity, and aging concerns, simplifying design for high-reliability applications such as medical sensors and aerospace telemetry.
What is the minimum shunt current required for LM4040CIX3-5.0+T to regulate properly?
The LM4040CIX3-5.0+T requires a minimum shunt current of 60μA to maintain regulation within specification. Below this threshold, output voltage may deviate beyond the ±0.5% initial accuracy band. Designers must size the series resistor to ensure ≥60μA flows through LM4040CIX3-5.0+T even at lowest input voltage and highest load current.
How does the NC pin (Pin 3) affect LM4040CIX3-5.0+T functionality?
Pin 3 of LM4040CIX3-5.0+T is a no-connect terminal with no internal connection. It must be left unconnected or tied to Pin 2 (cathode); doing so has zero effect on electrical performance but maintains mechanical compatibility with SC70-3 footprint standards used across the LM4040 family.
Is LM4040CIX3-5.0+T qualified for automotive applications?
LM4040CIX3-5.0+T belongs to the AEC-Q100-qualified LM4040 family. While the specific part number LM4040CIX3-5.0+T is not individually marked "/V", its SC70-3 packaging, −40°C to +125°C rating, and qualification pedigree make it suitable for non-safety-critical automotive subsystems such as infotainment power supplies and body electronics-subject to customer qualification.
LM4040CIX3-5.0+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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040CIX3-5.0+T FAQ
1.How can I place an order for LM4040CIX3-5.0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIX3-5.0+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 LM4040CIX3-5.0+T reliable?
The price and inventory of LM4040CIX3-5.0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIX3-5.0+T is usually 5 days.
3.What payment methods are accepted for LM4040CIX3-5.0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIX3-5.0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIX3-5.0+T?
LM4040CIX3-5.0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIX3-5.0+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 LM4040CIX3-5.0+T?
For technical support, including LM4040CIX3-5.0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIX3-5.0+T requirements.
6.How does Aetrix verify that LM4040CIX3-5.0+T is sourced from the original manufacturer or authorized distributors?
All LM4040CIX3-5.0+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 LM4040CIX3-5.0+T meets industry standards.
7.What is the process for return or replacement of LM4040CIX3-5.0+T?
All LM4040CIX3-5.0+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIX3-5.0+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 LM4040CIX3-5.0+T part is unused and in its original packaging.
Return procedure for LM4040CIX3-5.0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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