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Analog Devices Inc./Maxim Integrated LM4040BIX3-5.0-T
- Part No.:
- LM4040BIX3-5.0-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040BIX3-5.0-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:80,000
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Product details
Overview
LM4040BIX3-5.0-T from Maxim Integrated is a precision 5.000V two-terminal shunt voltage reference in SC70-3 package, featuring 0.2% initial accuracy, ±100ppm/°C temperature coefficient, and stable operation from -40°C to +125°C. It delivers low dynamic impedance (≤0.8Ω), 80µVRMS wideband noise (10Hz–10kHz), and operates across 60μA–15mA shunt current - ideal for high-accuracy ADC/DAC biasing and portable power management.
For engineers reviewing the LM4040BIX3-5.0-T datasheet, LM4040BIX3-5.0-T pinout, LM4040BIX3-5.0-T application, or LM4040BIX3-5.0-T equivalent, key selection criteria include guaranteed extended-temperature performance, no-output-capacitor stability, subminiature footprint compatibility with space-constrained PCBs, and direct replacement capability for legacy 5V shunt references requiring ≤0.2% tolerance.
Technical Context
The LM4040BIX3-5.0-T uses bandgap-based shunt regulation to maintain a precise 5.000V reverse breakdown voltage across its cathode-anode terminals. Its laser-trimmed internal resistor network ensures 0.2% initial accuracy at +25°C, with temperature drift bounded by ±100ppm/°C over -40°C to +125°C.
It functions as a two-terminal device requiring only an external series resistor to set operating current, supports capacitive loads without instability, and achieves low 0.8Ω dynamic impedance at 1mA - enabling stable reference generation under varying load and supply conditions in battery-powered and industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±10mV at +25°C - guarantees tight tolerance for 12-bit+ data converter reference rails |
| Initial Accuracy | ±0.2% - enables single-point calibration elimination in precision sensor front-ends |
| Temp Coefficient | ±100ppm/°C - ensures ≤±5mV drift over full -40°C to +125°C range |
| Shunt Current Range | 60μA to 15mA - supports ultra-low-power sleep modes and high-current regulation simultaneously |
| Dynamic Impedance | ≤0.8Ω at 1mA - minimizes output voltage perturbation during fast load transients |
| Wideband Noise | 80µVRMS (10Hz–10kHz) - preserves SNR in high-resolution analog signal chains |
| Operating Temp | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
LM4040BIX3-5.0-T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is NC and must remain unconnected or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-bias input terminal - connects to higher-potential node via series resistor |
| 2 (–) | Anode | Reference ground return - ties to system GND or low-side of load |
| 3 (N.C.) | No Connection | Must be left floating 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 >50% board space vs. SOT23, critical for wearables and IoT nodes |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout risk from external COUT |
| Guaranteed extended-temp operation | Specified over -40°C to +125°C - supports automotive and industrial applications without derating |
| Low 60μA minimum operating current | Enables micropower designs - extends battery life in always-on sensor monitors and remote telemetry |
| Laser-trimmed accuracy | 0.2% initial tolerance - reduces need for post-assembly calibration in production test flows |
Applications
| Portable Medical Sensors | Notebook Computer Power Rails |
|---|---|
Use Scenario: Reference for 16-bit SAR ADC measuring ECG/SpO₂ signals in battery-powered patch monitors. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.000V excitation and conversion基准 for analog front-end. Use Value: ±0.2% accuracy and <80µVRMS noise preserve clinical-grade measurement fidelity without external filtering. | Use Scenario: Precision reference for VRM feedback loop and battery fuel-gauge IC in ultrabook platforms. IC Role / Device Role / Timing Role: Two-terminal shunt reference regulating 5V auxiliary rail used by PMIC and coulomb counter. Use Value: SC70 size enables placement near high-density power stages; -40°C to +125°C rating covers full thermal envelope. |
| Industrial Process Transmitters | Automotive Cabin Control Modules |
Use Scenario: 4–20mA loop transmitter with HART modulation requiring stable 5V reference for DAC and isolator biasing. IC Role / Device Role / Timing Role: Primary voltage reference sourcing current into isolated DC-DC bias windings and signal conditioning circuitry. Use Value: 15mA max shunt current supports dual-rail isolation supplies; ±100ppm/°C drift meets IEC 61000-6-2 long-term stability requirements. | Use Scenario: HVAC and infotainment control unit requiring robust 5V reference for microcontroller ADC and touch-sensing front-end. IC Role / Device Role / Timing Role: Shunt reference powering analog sensors and interface logic in AEC-Q200-compliant modules. Use Value: Extended -40°C to +125°C operation ensures reliability across engine-off cold soak and cabin heat soak cycles. |
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 | 3-terminal adjustable shunt regulator; 2.5V–36V programmable output; 0.5% initial accuracy; requires external resistors | Not drop-in - needs redesign of feedback network; better for variable-voltage or higher-voltage (>5V) use cases | Select when output voltage flexibility or >5V reference is required; avoid if fixed 5.000V and minimal component count are mandatory |
| ADR3450ARJZ-R7 | 3-terminal series reference; 5.000V output; 0.1% initial accuracy; 3ppm/°C tempco; higher quiescent current (120µA min) | Series architecture - requires dedicated input supply rail; not compatible with shunt-based topologies | Choose for ultra-low-drift applications where series topology fits the power architecture; not suitable for simple resistor-biased shunt circuits |
Compared with TLVH431ACDBVR and ADR3450ARJZ-R7, the LM4040BIX3-5.0-T offers true two-terminal simplicity, lowest board-area footprint, and optimal trade-off between accuracy (0.2%), temperature stability (±100ppm/°C), and micropower operation - making it the preferred choice for fixed 5V shunt reference implementations in space- and current-constrained designs.
Availability
LM4040BIX3-5.0-T is available at Aetrix Electronics and suitable for portable medical sensors, notebook computer power rails, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for LM4040BIX3-5.0-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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, sensing, and communication applications.
The LM4040 product line delivers precision micropower shunt voltage references optimized for space-constrained, battery-operated, and high-reliability systems demanding stable reference voltages across wide temperature ranges.
FAQ
What is the guaranteed operating temperature range for LM4040BIX3-5.0-T?
The LM4040BIX3-5.0-T is specified and guaranteed over -40°C to +125°C. This extended temperature range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official Maxim datasheet, and applies specifically to the "E" grade (industrial/automotive) variant packaged in SC70-3 - which matches the "EX3" suffix in LM4040BIX3-5.0-T.
Does LM4040BIX3-5.0-T require an external output capacitor for stability?
No, the LM4040BIX3-5.0-T does not require an external output capacitor. The datasheet explicitly states "No Output Capacitors Required" and confirms stability with any capacitive load - a key advantage of its internal bandgap design and low dynamic impedance. This eliminates layout sensitivity and reduces BOM count in compact designs.
What is the minimum shunt current needed for LM4040BIX3-5.0-T to regulate properly?
The LM4040BIX3-5.0-T requires a minimum shunt current of 60μA to maintain regulation. This value is specified in the Electrical Characteristics table for the 5.000V version under "Minimum Operating Current" (IRMIN) and is consistent across all accuracy grades (A/B/C/D) for this output voltage and package.
How does the pin configuration of LM4040BIX3-5.0-T differ from standard 3-pin SOT23 references?
The LM4040BIX3-5.0-T uses a 3-pin SC70 package with pin 1 = Cathode (+), pin 2 = Anode (–), and pin 3 = N.C. Unlike many 3-terminal regulators, pin 3 has no internal connection and must be left unconnected or tied to pin 2 - a critical distinction that prevents misrouting in layout and avoids potential damage from unintended biasing.
What is the wideband noise specification for LM4040BIX3-5.0-T, and how is it measured?
The LM4040BIX3-5.0-T exhibits 80µVRMS wideband noise over 10Hz to 10kHz, as measured at IR = 100µA per the Electrical Characteristics table for the 5.000V version. This value reflects total integrated RMS noise and directly impacts signal-chain SNR in precision ADC/DAC applications - especially where low-noise analog front-ends are required.
LM4040BIX3-5.0-T 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- 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
LM4040BIX3-5.0-T FAQ
1.How can I place an order for LM4040BIX3-5.0-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIX3-5.0-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 LM4040BIX3-5.0-T reliable?
The price and inventory of LM4040BIX3-5.0-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIX3-5.0-T is usually 5 days.
3.What payment methods are accepted for LM4040BIX3-5.0-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIX3-5.0-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIX3-5.0-T?
LM4040BIX3-5.0-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIX3-5.0-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 LM4040BIX3-5.0-T?
For technical support, including LM4040BIX3-5.0-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIX3-5.0-T requirements.
6.How does Aetrix verify that LM4040BIX3-5.0-T is sourced from the original manufacturer or authorized distributors?
All LM4040BIX3-5.0-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 LM4040BIX3-5.0-T meets industry standards.
7.What is the process for return or replacement of LM4040BIX3-5.0-T?
All LM4040BIX3-5.0-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIX3-5.0-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 LM4040BIX3-5.0-T part is unused and in its original packaging.
Return procedure for LM4040BIX3-5.0-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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