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Analog Devices Inc./Maxim Integrated LM4050AIM3-4.1+
- Part No.:
- LM4050AIM3-4.1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3-4.1+.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:785
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Product details
Overview
LM4050AIM3-4.1+ from Maxim Integrated is a precision 4.096V shunt voltage reference in SOT23-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient (typ), and stable operation from 73µA to 15mA shunt current. It delivers low 64µVRMS wideband noise (10Hz–10kHz) and supports industrial temperature range (−40°C to +125°C), ideal for high-resolution ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050AIM3-4.1+ datasheet, LM4050AIM3-4.1+ pinout, LM4050AIM3-4.1+ application, or LM4050AIM3-4.1+ equivalent, key selection criteria include guaranteed 4.096V output tolerance (±4.1mV at +25°C, ±25mV over full temp range), no-output-capacitor stability, and SC70/SOT23 footprint compatibility for space-constrained designs.
Technical Context
The LM4050AIM3-4.1+ uses laser-trimmed bandgap architecture to maintain precise reverse breakdown voltage without external compensation. Its two-terminal shunt topology sinks variable current to regulate voltage across a series resistor, enabling simple integration into high-side or floating reference configurations.
Designed for micropower operation, it achieves stable regulation with minimum shunt current of 73µA and tolerates capacitive loads up to ≥1µF without oscillation. The device exhibits low dynamic impedance (0.5–1.0Ω at 1mA/120Hz) and long-term stability of 120ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±4.1mV at +25°C; ±25mV over −40°C to +125°C - enables direct interface with 12-bit ADCs requiring 1 LSB = 1mV |
| Initial Accuracy | 0.1% (A-grade) - eliminates need for system-level calibration in factory-set measurement devices |
| Tempco | ±15ppm/°C typical - ensures <±0.5mV drift across industrial temperature range for precision sensor signal chains |
| Shunt Current Range | 73µA to 15mA - supports ultra-low-power sleep modes and high-current load transients without dropout |
| Wideband Noise | 64µVRMS (10Hz–10kHz) - minimizes added noise in high-gain analog front-ends and precision data acquisition |
| Dynamic Impedance | 0.5–1.0Ω at 1mA - maintains voltage stability under fast load steps common in multiplexed sensor systems |
| Long-Term Stability | 120ppm over 1000h - ensures reference integrity in unattended field-deployed equipment |
Pinout & Package
LM4050AIM3-4.1+ is housed in a RoHS-compliant 3-pin SOT23-3 package (1.8mm × 2.9mm footprint), with thermal pad omitted. Pin 3 is NC and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Cathode Input | Connects to regulated output node; reverse-biased during normal operation to establish 4.096V reference |
| Pin 2 (−) | Cathode / Reference Ground | Serves as reference return path; defines 0V reference plane for connected circuitry |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or shorted to Pin 2; not internally bonded - prevents unintended parasitic paths |
Key Features
| Feature | Design Value |
|---|---|
| 0.1% Initial Accuracy | Reduces post-manufacturing calibration burden in medical and test equipment where traceable accuracy is required |
| No Output Capacitor Required | Eliminates BOM cost and board area for stabilization caps while maintaining stability with any capacitive load |
| SC70/SOT23 Footprint Compatibility | Enables drop-in replacement between LM4050AEX3-4.1+ (SC70) and LM4050AIM3-4.1+ (SOT23) in existing layouts |
| 64µVRMS Wideband Noise | Preserves SNR in 16-bit+ data converters by contributing <0.01% of full-scale noise floor |
| −40°C to +125°C Guaranteed Operation | Supports deployment in automotive engine control units and industrial motor drives without derating |
Applications
| Portable Data Loggers | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Battery-powered environmental sensor nodes logging temperature, humidity, and pressure at 1-second intervals. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for 12-bit SAR ADC sampling sensor bridge outputs. Use Value: Enables ±0.1°C temperature resolution using ratiometric measurement, with 73µA min current extending battery life beyond 5 years. | Use Scenario: Modular I/O card accepting 4–20mA current-loop field signals in harsh factory environments. IC Role / Device Role / Timing Role: Supplies precision reference for op-amp-based current-to-voltage conversion and ADC digitization. Use Value: Maintains <±0.05% full-scale error across −40°C to +85°C ambient, meeting IEC 61000-6-2 immunity requirements. |
| Medical Patient Monitors | Automotive Battery Management Systems |
Use Scenario: Compact ECG front-end acquiring biopotential signals with >100dB CMRR. IC Role / Device Role / Timing Role: Sets bias point for instrumentation amplifier and reference for 16-bit delta-sigma ADC. Use Value: 64µVRMS noise contributes <0.005% of total input-referred noise, preserving diagnostic signal fidelity. | Use Scenario: Cell voltage monitoring IC in 12S Li-ion battery packs operating near engine compartments. IC Role / Device Role / Timing Role: Supplies accurate reference for voltage measurement channels tracking individual cell voltages. Use Value: ±25mV total tolerance over −40°C to +125°C ensures <±1mV absolute error per cell, critical for SOC estimation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3-4.1+ | 0.5% initial accuracy, higher 100ppm/°C tempco, 60µA–15mA current range | Lower-cost option for non-critical biasing where ±20mV output tolerance is acceptable | Select when budget constraints outweigh precision requirements and long-term stability is secondary |
| REF3040AIDBZR | 4.096V, 0.2% initial accuracy, 50ppm/°C tempco, 25µA–25mA range, 35µVRMS noise | Higher drive capability and lower noise suit high-speed DAQ systems with dynamic loading | Choose for applications needing wider current headroom or improved noise performance at modest cost premium |
Compared with LM4040CIM3-4.1+, LM4050AIM3-4.1+ offers 5× tighter initial accuracy and 3× better tempco for metrology-grade references; versus REF3040AIDBZR, it trades slightly higher noise for lower quiescent current and proven robustness in capacitive-load scenarios.
Availability
LM4050AIM3-4.1+ is available at Aetrix Electronics and suitable for portable instrumentation, industrial process controllers, and automotive battery monitoring systems requiring stable component supply with full industrial temperature support.
Supply support for LM4050AIM3-4.1+ 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 communications applications.
The LM4050/LM4051 product line delivers micropower shunt references optimized for space-constrained, battery-operated systems requiring high accuracy and wide temperature operation without external compensation.
FAQ
What is the minimum operating current for LM4050AIM3-4.1+?
The LM4050AIM3-4.1+ requires a minimum shunt current of 73µA to maintain regulation at 4.096V across its full temperature range. This value is specified in the Electrical Characteristics table for the 4.096V variant under "Minimum Operating Current" with IRMIN = 73µA (max). Below this threshold, output voltage may deviate beyond guaranteed tolerance limits.
Does LM4050AIM3-4.1+ require an external capacitor for stability?
No, LM4050AIM3-4.1+ does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including values up to 1µF and beyond, as confirmed in the Applications Information section and Typical Operating Characteristics plots.
What is the pin configuration of LM4050AIM3-4.1+?
LM4050AIM3-4.1+ uses a standard 3-pin SOT23-3 package: Pin 1 is the anode (+), Pin 2 is the cathode (−), and Pin 3 is NC (no connection). Datasheet Figure 1 and Pin Description table explicitly state Pin 3 must be left floating or connected to Pin 2 - it is not internally bonded.
How does LM4050AIM3-4.1+ compare to LM4050AEX3-4.1+?
LM4050AIM3-4.1+ (SOT23-3) and LM4050AEX3-4.1+ (SC70-3) share identical electrical specifications - same 4.096V output, 0.1% accuracy, ±15ppm/°C tempco, and 73µA–15mA current range. The only difference is package: SOT23-3 offers larger solder pads and higher power dissipation (320mW vs. 174mW), while SC70-3 provides 50% smaller footprint.
What is the wideband noise specification for LM4050AIM3-4.1+?
The LM4050AIM3-4.1+ exhibits 64µVRMS wideband noise over the 10Hz to 10kHz frequency range, as measured at 100µA shunt current. This value is documented in the "ELECTRICAL CHARACTERISTICS-4.096V" table under "Wideband Noise (eN)" and directly impacts signal-chain SNR in high-resolution data acquisition systems.
LM4050AIM3-4.1+ 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:
- ±0.1%
- 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
LM4050AIM3-4.1+ FAQ
1.How can I place an order for LM4050AIM3-4.1+ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3-4.1+ 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 LM4050AIM3-4.1+ reliable?
The price and inventory of LM4050AIM3-4.1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3-4.1+ is usually 5 days.
3.What payment methods are accepted for LM4050AIM3-4.1+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3-4.1+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3-4.1+?
LM4050AIM3-4.1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3-4.1+ 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 LM4050AIM3-4.1+?
For technical support, including LM4050AIM3-4.1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3-4.1+ requirements.
6.How does Aetrix verify that LM4050AIM3-4.1+ is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3-4.1+ 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 LM4050AIM3-4.1+ meets industry standards.
7.What is the process for return or replacement of LM4050AIM3-4.1+?
All LM4050AIM3-4.1+ units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3-4.1+, 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 LM4050AIM3-4.1+ part is unused and in its original packaging.
Return procedure for LM4050AIM3-4.1+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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