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Analog Devices Inc./Maxim Integrated LM4050BIM3-4.1+T
- Part No.:
- LM4050BIM3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3-4.1+T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:40,000
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Product details
Overview
LM4050BIM3-4.1+T from Maxim Integrated is a precision 4.096V two-terminal shunt voltage reference in SC70-3 package, rated for -40°C to +125°C operation, with ±0.2% initial accuracy, ±15ppm/°C temperature coefficient, and 64µVRMS wideband noise (10Hz–10kHz). It delivers stable regulation across 73µA to 15mA shunt current and is used in high-accuracy ADC/DAC biasing, portable instrumentation, and battery-powered sensor signal chains.
For engineers reviewing the LM4050BIM3-4.1+T datasheet, LM4050BIM3-4.1+T pinout, LM4050BIM3-4.1+T application, or LM4050BIM3-4.1+T equivalent, key selection criteria include guaranteed 4.096V output tolerance over full industrial temperature range, no external capacitor requirement, low dynamic impedance (0.5–1.0Ω), micropower operation down to 73µA minimum current, and SC70 footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4050BIM3-4.1+T implements a laser-trimmed bandgap core with BiCMOS process technology, delivering fixed 4.096V reverse breakdown voltage without requiring series pass transistors or external compensation. Its shunt architecture sinks variable current to maintain constant voltage across load variations.
It operates as a two-terminal device with pin 3 unconnected or tied to pin 2, enabling direct integration into high-side sensing and floating reference topologies. The device maintains stability under capacitive loads up to 1µF and exhibits <10mV reverse voltage change across 1–15mA shunt current variation at +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±8.2mV (±0.2%) initial tolerance at +25°C ensures accurate 12-bit DAC/ADC reference scaling |
| Temperature Coefficient | ±15ppm/°C max over -40°C to +125°C; contributes ≤±0.7% total error across full range |
| Shunt Current Range | 73µA to 15mA; supports ultra-low-power sensor interfaces and high-current precision regulators |
| Dynamic Impedance | 0.5–1.0Ω at 1mA/120Hz; minimizes load-induced voltage droop during transient current steps |
| Wideband Noise | 64µVRMS (10Hz–10kHz); suitable for 16-bit SAR ADC reference without additional filtering |
| Long-Term Stability | 120ppm after 1000 hours; enables reliable performance in sealed industrial monitoring systems |
Pinout & Package
LM4050BIM3-4.1+T uses a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is NC and must be left floating or connected to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Positive Terminal | Connects to system ground or low-side return path; defines reference potential node |
| Pin 2 (−) | Cathode / Negative Terminal | Connects to regulated voltage rail; sinks shunt current to maintain 4.096V drop |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or shorted to pin 2; not internally bonded-floating connection avoids parasitic leakage |
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 compact IoT nodes |
| No output capacitor required | Stable with any capacitive load up to 1µF-eliminates BOM cost and layout constraints of external stabilization |
| Guaranteed -40°C to +125°C operation | Specified performance across full automotive and industrial ambient range without derating |
| Low 64µVRMS noise (10Hz–10kHz) | Enables direct use in 16-bit data acquisition without post-filtering or noise-reduction circuitry |
| 60µA to 15mA shunt current capability | Supports both micropower sensor front-ends (<100µA) and high-precision active filters (>10mA) |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered ECG front-end with 16-bit sigma-delta ADC sampling at 1kSPS. IC Role / Device Role / Timing Role: Provides precise 4.096V reference for ADC full-scale calibration and gain setting. Use Value: ±0.2% initial accuracy and ±15ppm/°C TC ensure <0.05% total reference error across body-worn temperature shifts. |
Use Scenario: Ruggedized environmental monitor logging temperature, humidity, and pressure over 10-year field deployment. IC Role / Device Role / Timing Role: Supplies stable reference to multi-channel SAR ADCs interfacing RTDs and bridge sensors. Use Value: 120ppm long-term drift and -40°C to +125°C rating guarantee calibration integrity without periodic recalibration. |
| Handheld Test Equipment | Automotive Cabin Control Units |
Use Scenario: Pocket-sized multimeter with autoranging 200mV–10V DC measurement capability. IC Role / Device Role / Timing Role: Serves as primary voltage reference for internal 24-bit delta-sigma converter and auto-zero amplifier. Use Value: 64µVRMS noise and 0.5Ω dynamic impedance prevent resolution loss during fast range switching and AC coupling. |
Use Scenario: HVAC control module measuring cabin temperature via NTC thermistor in vehicle interior. IC Role / Device Role / Timing Role: Generates precision bias for ratiometric thermistor measurement using microcontroller's internal ADC. Use Value: SC70 size allows placement adjacent to sensor traces, minimizing thermal gradients and PCB trace resistance errors. |
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; higher 200µA min current; SOT23-3 | Requires external resistor divider; less suitable for fixed-voltage, low-current precision roles | Select when programmable reference or higher voltage (>5V) is needed; avoid for 4.096V fixed-point metrology |
| REF3040AIDBZR | 4.096V fixed; 0.2% accuracy; 50ppm/°C TC; 50µA min current; SOT23-3; 33µVRMS noise | Lower noise and tighter TC but requires 1µF output capacitor for stability | Prefer for ultra-low-noise 18-bit systems where capacitor addition is acceptable; LM4050BIM3-4.1+T wins in capacitor-free designs |
Compared with TLVH431ACDBVR and REF3040AIDBZR, LM4050BIM3-4.1+T uniquely combines fixed 4.096V output, capacitor-free stability, SC70 size, and guaranteed 125°C operation-making it optimal for space- and reliability-critical embedded measurement nodes where layout simplicity and thermal robustness are non-negotiable.
Availability
LM4050BIM3-4.1+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, and handheld test equipment requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for LM4050BIM3-4.1+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 precision analog and mixed-signal ICs for demanding industrial, automotive, and medical applications, emphasizing low power, high accuracy, and small form factor.
The LM4050 series targets space-constrained, high-stability reference needs in battery-powered and thermally harsh environments-delivering micropower shunt regulation without external components.
FAQ
What is the exact output voltage tolerance of LM4050BIM3-4.1+T at +25°C?
The LM4050BIM3-4.1+T has a nominal output voltage of 4.096V with ±8.2mV (±0.2%) initial tolerance at +25°C, corresponding to the 'B' grade specification. This is confirmed in the Electrical Characteristics table for 4.096V devices under LM4050B conditions, where VRMIN = 4.0878V and VRMAX = 4.1042V at TA = +25°C.
Does LM4050BIM3-4.1+T require an external output capacitor for stability?
No, LM4050BIM3-4.1+T does not require an external output capacitor. The datasheet explicitly states "No Output Capacitors Required" and confirms stability with any capacitive load, including up to 1µF. This eliminates layout complexity and BOM cost compared to many series references.
What is the minimum operating current for LM4050BIM3-4.1+T across temperature?
The minimum operating current for LM4050BIM3-4.1+T is 73µA, specified over the full -40°C to +125°C range. This value appears in the ELECTRICAL CHARACTERISTICS-4.096V table under "Minimum Operating Current (IRMIN)" with conditions IRMIN = 50µA (min) / 73µA (typ) at TA = TMIN to TMAX.
Can pin 3 of LM4050BIM3-4.1+T be left unconnected?
Yes-pin 3 of LM4050BIM3-4.1+T is designated N.C. (No Connection) and must either be left floating or connected to pin 2 (cathode). The datasheet's Pin Description section and Typical Operating Circuit diagram confirm this requirement to avoid undefined behavior or leakage paths.
What is the wideband noise performance of LM4050BIM3-4.1+T?
LM4050BIM3-4.1+T delivers 64µVRMS wideband noise over the 10Hz to 10kHz frequency range, as measured at IR = 100µA. This value is documented in the ELECTRICAL CHARACTERISTICS-4.096V table under "Wideband Noise (eN)" and supports high-resolution data conversion without added filtering.
LM4050BIM3-4.1+T 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:
- 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:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- 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
LM4050BIM3-4.1+T FAQ
1.How can I place an order for LM4050BIM3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3-4.1+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 LM4050BIM3-4.1+T reliable?
The price and inventory of LM4050BIM3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIM3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4050BIM3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3-4.1+T?
LM4050BIM3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3-4.1+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 LM4050BIM3-4.1+T?
For technical support, including LM4050BIM3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3-4.1+T requirements.
6.How does Aetrix verify that LM4050BIM3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3-4.1+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 LM4050BIM3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4050BIM3-4.1+T?
All LM4050BIM3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3-4.1+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 LM4050BIM3-4.1+T part is unused and in its original packaging.
Return procedure for LM4050BIM3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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