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Analog Devices Inc./Maxim Integrated LM4040BIX3-4.1
- Part No.:
- LM4040BIX3-4.1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040BIX3-4.1.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:1,330
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Product details
Overview
LM4040BIX3-4.1 from Maxim Integrated is a precision 4.096V two-terminal shunt voltage reference in SC70-3 package, featuring ±0.2% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +85°C, 50µA to 73µA minimum operating current, and 28µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference for ADC/DAC biasing and portable power monitoring circuits.
For engineers reviewing the LM4040BIX3-4.1 datasheet, LM4040BIX3-4.1 pinout, LM4040BIX3-4.1 application, or LM4040BIX3-4.1 equivalent, this page delivers verified electrical parameters, validated SC70-3 terminal mapping, confirmed shunt-current stability behavior, and real-world substitution guidance for space-constrained, battery-powered systems.
Technical Context
The LM4040BIX3-4.1 uses a bandgap-based shunt architecture to maintain a fixed reverse breakdown voltage across its terminals when biased with 50µA–15mA cathode-to-anode current. Its internal BiCMOS process enables low dynamic impedance (0.5–1.0Ω at 1mA) and eliminates need for external stabilization capacitors.
It operates without forward conduction concerns below 10mA anode-to-cathode current and tolerates any capacitive load while delivering stable 4.096V output. Temperature drift is bounded by ±15ppm/°C over full industrial range, with long-term stability of 120ppm after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; tight tolerance (±8.2mV min/max at +25°C) ensures accurate 12-bit ADC reference scaling. |
| Initial Accuracy | ±0.2% (Grade B); guarantees ≤±8.2mV error at room temperature for calibration-critical designs. |
| Tempco | ±15ppm/°C max; contributes ≤±0.98mV drift over –40°C to +85°C, enabling stable operation in unregulated environments. |
| Min Operating Current | 50µA (typ), 73µA (max); allows ultra-low-power biasing in sleep-mode sensor nodes. |
| Dynamic Impedance | 0.5–1.0Ω at 1mA; maintains <±3mV regulation shift under 1mA load transients. |
| Noise (10Hz–10kHz) | 28µVRMS; supports high-resolution data acquisition without added filtering overhead. |
| Long-Term Stability | 120ppm (1000h); ensures <±0.5mV reference drift over first year of operation. |
Pinout & Package
LM4040BIX3-4.1 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-impedance return path; defines reference potential node. |
| Pin 2 (−) | Cathode (negative terminal) | Receives shunt current; output voltage appears between Pin 2 and Pin 1. |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; no internal function or signal routing. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area enables placement in dense portable PCB layouts where SOT23-3 is prohibitive. |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost and layout risk from external COUT. |
| Wide shunt current range | 50µA–15mA operation supports both micropower sensor biasing and higher-current DAC reference buffering. |
| Laser-trimmed precision | Ensures Grade B (±0.2%) accuracy without post-assembly calibration in production test flow. |
| Low 28µVRMS noise | Enables direct use in 16-bit SAR ADC references without noise-filtering RC networks. |
Applications
| Portable Medical Sensors | Battery Fuel Gauging |
|---|---|
Use Scenario: Continuous glucose monitor with 12-bit ADC sampling analog electrochemical signal. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.096V full-scale reference for ADC conversion. Use Value: ±0.2% initial accuracy and ±15ppm/°C tempco ensure <±1 LSB error across operating temperature, eliminating recalibration. |
Use Scenario: Smart battery pack with coulomb counter IC requiring precise voltage reference for cell voltage measurement. IC Role / Device Role / Timing Role: Precision shunt reference supplying regulated 4.096V to fuel gauge analog front end. Use Value: 28µVRMS noise and 0.5Ω dynamic impedance prevent measurement jitter during load transients, improving state-of-charge accuracy. |
| Industrial Data Loggers | Wearables Power Management |
Use Scenario: Remote environmental sensor node logging temperature/humidity via 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Low-drift shunt reference for ADC reference input and internal LDO feedback divider. Use Value: 120ppm long-term stability ensures <±0.5mV reference drift over 12 months, maintaining calibration integrity without field service. |
Use Scenario: Fitness tracker with integrated heart-rate sensor and rechargeable Li-ion battery. IC Role / Device Role / Timing Role: Micropower shunt reference powering analog sensor bias and battery voltage monitoring circuitry. Use Value: 50µA minimum operating current enables operation during deep-sleep mode, extending battery life beyond 7 days. |
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; requires two external resistors; 2% initial accuracy; 90ppm/°C tempco. | Used where programmability justifies added components and reduced precision; not drop-in for fixed 4.096V. | Select only if design requires adjustable reference or higher voltage capability beyond 5V. |
| MAX6008AEUR+T | Fixed 4.096V; SOT23-3 package; ±0.1% accuracy; 20ppm/°C tempco; 65µA min current. | Higher accuracy grade but larger footprint and higher minimum current limits ultra-low-power use. | Prefer when ±0.1% accuracy is mandatory and SC70 size constraint is relaxed. |
Compared with TLVH431AIDBZR and MAX6008AEUR+T, LM4040BIX3-4.1 uniquely balances SC70-3 miniaturization, Grade B precision, and sub-100µA operating capability-making it optimal for space- and power-constrained 4.096V reference needs without resistor networks or layout penalty.
Availability
LM4040BIX3-4.1 is available at Aetrix Electronics and suitable for portable medical sensors, battery fuel gauging, and industrial data loggers requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LM4040BIX3-4.1 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 demanding industrial, medical, and portable applications, emphasizing low power, small size, and high reliability.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated systems needing stable, low-noise, capacitor-free voltage references across standard voltage points.
FAQ
What is the exact output voltage tolerance of LM4040BIX3-4.1 at +25°C?
The LM4040BIX3-4.1 has a nominal output voltage of 4.096V with Grade B initial accuracy of ±0.2%, translating to a guaranteed tolerance of ±8.2mV (4.088V to 4.104V) at +25°C. This is explicitly specified in the Electrical Characteristics table for LM4040_I_3-4.1 under "Reverse Breakdown Voltage" parameter.
Can LM4040BIX3-4.1 operate without an external capacitor?
Yes, LM4040BIX3-4.1 does not require an external output capacitor and remains stable with any capacitive load. This is confirmed in both the General Description ("No Output Capacitors Required") and Applications Information sections, which state it is "stable for any output capacitance."
What is the minimum shunt current required for LM4040BIX3-4.1 to regulate properly?
The LM4040BIX3-4.1 requires a minimum shunt current of 50µA (typical) and up to 73µA (maximum) across the –40°C to +85°C range to maintain regulation. This value is documented in the "ELECTRICAL CHARACTERISTICS-LM4040_I_3-4.1" table under "Minimum Operating Current (IRMIN)."
Is Pin 3 of LM4040BIX3-4.1 functional or optional?
Pin 3 of LM4040BIX3-4.1 is designated N.C. (No Connection) and is not functional. The datasheet explicitly states: "PIN 3 MUST BE LEFT FLOATING OR CONNECTED TO PIN 2." It must never be driven or used as a signal path.
How does LM4040BIX3-4.1 compare to LM4040AIM3-4.1 in terms of accuracy and package?
LM4040BIX3-4.1 offers ±0.2% initial accuracy in SC70-3 (1.8mm × 1.8mm), while LM4040AIM3-4.1 provides tighter ±0.1% accuracy but in the larger SOT23-3 package. Both share identical 4.096V output, ±15ppm/°C tempco, and –40°C to +85°C rating-differing only in grade and footprint.
LM4040BIX3-4.1 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:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 64µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040BIX3-4.1 FAQ
1.How can I place an order for LM4040BIX3-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIX3-4.1 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 LM4040BIX3-4.1 reliable?
The price and inventory of LM4040BIX3-4.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIX3-4.1 is usually 5 days.
3.What payment methods are accepted for LM4040BIX3-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIX3-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIX3-4.1?
LM4040BIX3-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIX3-4.1 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 LM4040BIX3-4.1?
For technical support, including LM4040BIX3-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIX3-4.1 requirements.
6.How does Aetrix verify that LM4040BIX3-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4040BIX3-4.1 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 LM4040BIX3-4.1 meets industry standards.
7.What is the process for return or replacement of LM4040BIX3-4.1?
All LM4040BIX3-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIX3-4.1, 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 LM4040BIX3-4.1 part is unused and in its original packaging.
Return procedure for LM4040BIX3-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040BIX3-4.1 Tags
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