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Analog Devices Inc./Maxim Integrated LM4050AIX3-2.1
- Part No.:
- LM4050AIX3-2.1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AIX3-2.1.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:2,007
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Product details
Overview
LM4050AIX3-2.1 from Maxim Integrated is a precision 2.048V shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient (max), and 60µA–15mA operating current range. It delivers stable reverse breakdown voltage for ADC/DAC biasing, sensor excitation, and portable power management circuits.
For engineers reviewing the LM4050AIX3-2.1 datasheet, LM4050AIX3-2.1 pinout, LM4050AIX3-2.1 application, or LM4050AIX3-2.1 equivalent, key selection criteria include guaranteed -40°C to +125°C operation, no external capacitor requirement, low 28µVRMS noise (10Hz–10kHz), and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4050AIX3-2.1 uses laser-trimmed bandgap circuitry to maintain a precise 2.048V reverse breakdown voltage across its anode and cathode terminals. Its internal BiCMOS process enables micropower operation with dynamic impedance as low as 0.3Ω at 1mA.
It operates as a two-terminal shunt device: current flows from cathode to anode under reverse bias, clamping voltage at 2.048V; forward conduction occurs at ~0.7V below ground. Pin 3 is unconnected or tied to pin 2 per datasheet specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±2.0mV at +25°C - matches standard 12-bit DAC full-scale reference and avoids scaling errors in precision data converters. |
| Initial Accuracy | 0.1% (A-grade) - ensures ≤±2.05mV absolute error at room temperature without calibration. |
| Tempco | ±15ppm/°C max - contributes ≤±1.53mV drift over -40°C to +125°C, critical for industrial sensor front-ends. |
| Operating Current | 60µA to 15mA - supports ultra-low-power battery monitoring (e.g., coin-cell systems) and higher-current analog supply regulation. |
| Output Noise | 28µVRMS (10Hz–10kHz) - enables high-resolution 16-bit+ SAR ADC references without added filtering. |
| Dynamic Impedance | 0.3Ω typ at 1mA - minimizes load-induced voltage shift in varying-current applications like programmable current sources. |
| Long-Term Stability | 120ppm over 1000h - ensures <0.25mV drift in 5-year deployed instrumentation systems. |
Pinout & Package
SC70-3 package (1.8mm × 1.8mm × 0.9mm), 50% smaller than SOT23-3. RoHS-compliant, non-lead-free variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode | Positive terminal; connects to system ground or low-impedance return path in shunt configuration. |
| 2 (−) | Cathode | Negative terminal; connects to regulated output node and current-setting resistor (RS). |
| 3 (N.C.) | No Connection | Must be left floating or shorted to pin 2; not internally bonded - prevents parasitic leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | Enables placement in <2mm² PCB area - ideal for wearables and miniaturized IoT sensor nodes. |
| No output capacitor required | Eliminates BOM cost and layout risk associated with stability-compensating capacitors in portable designs. |
| Tolerates capacitive loads | Stable with any output capacitance (0–10µF), simplifying interface to ADC sample-and-hold inputs. |
| Wide shunt current range | Supports both micropower (60µA) and moderate-load (15mA) applications without redesigning RS. |
| Laser-trimmed accuracy | 0.1% grade achieved via post-package trimming - guarantees performance without system-level calibration. |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered ECG front-end with 16-bit sigma-delta ADC requiring stable 2.048V reference. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and conversion reference for analog signal chain. Use Value: 28µVRMS noise and ±15ppm/°C tempco ensure <1LSB error across body-temperature range (20°C–45°C). | Use Scenario: 4–20mA loop transmitter with microcontroller-based calibration and isolated analog output. IC Role / Device Role / Timing Role: Precision reference for DAC output scaling and sensor bridge excitation. Use Value: 0.1% initial accuracy eliminates factory trim steps; -40°C to +125°C rating supports outdoor deployment. |
| Smart Energy Meters | Automotive Cabin Sensors |
Use Scenario: Polyphase electricity meter using 24-bit metrology ADC with dual-supply architecture. IC Role / Device Role / Timing Role: Low-drift reference for high-resolution current/voltage measurement channels. Use Value: 120ppm long-term stability ensures metrology compliance over 10-year field life without recalibration. | Use Scenario: Occupancy detection module with MEMS accelerometer and low-power MCU in automotive cabin. IC Role / Device Role / Timing Role: Reference for analog sensor signal conditioning and ADC input scaling. Use Value: SC70-3 size fits tight space behind dashboard; 60µA min current enables operation during vehicle sleep mode. |
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 (2.5V setpoint), 0.5% initial accuracy, 100ppm/°C tempco, SOT23-3 | Requires external resistors to set 2.048V; higher drift limits use in precision metrology | Select when adjustable output or cost sensitivity outweighs fixed-voltage accuracy needs. |
| REF3020AIDBZR | 2.048V series reference, 0.2% accuracy, 50ppm/°C tempco, 50µA quiescent, SOT23-3 | Series topology requires minimum load current; incompatible with shunt-based current-source topologies | Choose for low-dropout, high-PSRR applications where supply headroom permits series configuration. |
Compared with TLVH431AIDBZR and REF3020AIDBZR, the LM4050AIX3-2.1 offers superior initial accuracy and lower tempco in a true two-terminal shunt form factor, enabling direct replacement in existing current-sink regulator designs without layout or bill-of-material changes.
Availability
LM4050AIX3-2.1 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition systems, and smart energy meters requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM4050AIX3-2.1 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, automotive, and communications applications.
The LM4050/LM4051 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-reliability systems requiring guaranteed performance from -40°C to +125°C.
FAQ
What is the guaranteed operating temperature range for the LM4050AIX3-2.1?
The LM4050AIX3-2.1 is fully specified and guaranteed over -40°C to +125°C. All electrical parameters-including reverse breakdown voltage, temperature coefficient, and dynamic impedance-are tested and characterized across this full industrial temperature range per Maxim's production test flow.
Can the LM4050AIX3-2.1 drive capacitive loads without instability?
Yes, the LM4050AIX3-2.1 is inherently stable with any capacitive load from 0 to ≥10µF. Its internal design eliminates the need for external compensation capacitors, making it suitable for direct connection to ADC sample-and-hold inputs, op-amp feedback networks, and other capacitive interfaces.
What is the minimum shunt current required for regulation in the LM4050AIX3-2.1?
The LM4050AIX3-2.1 requires a minimum shunt current of 60µA to maintain regulation. Below this threshold, output voltage deviates from the nominal 2.048V; datasheet graphs confirm stable behavior begins precisely at 60µA across all temperatures.
Is pin 3 of the LM4050AIX3-2.1 functional or optional?
Pin 3 of the LM4050AIX3-2.1 is designated N.C. (No Connection) and must be left floating or connected to pin 2. It is not internally bonded-connecting it elsewhere may introduce leakage or noise coupling, violating the validated pinout defined in Maxim's SC70-3 package drawing 21-0075C.
How does the LM4050AIX3-2.1 compare to the LM4050AEX3-2.1 in terms of specifications?
The LM4050AIX3-2.1 and LM4050AEX3-2.1 share identical electrical specifications, package (SC70-3), and performance characteristics. The "I" suffix denotes tape-and-reel packaging with standard moisture sensitivity level (MSL3), while "E" indicates bulk packaging-both are functionally interchangeable in circuit design.
LM4050AIX3-2.1 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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 28µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050AIX3-2.1 FAQ
1.How can I place an order for LM4050AIX3-2.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIX3-2.1 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 LM4050AIX3-2.1 reliable?
The price and inventory of LM4050AIX3-2.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIX3-2.1 is usually 5 days.
3.What payment methods are accepted for LM4050AIX3-2.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIX3-2.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIX3-2.1?
LM4050AIX3-2.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIX3-2.1 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 LM4050AIX3-2.1?
For technical support, including LM4050AIX3-2.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIX3-2.1 requirements.
6.How does Aetrix verify that LM4050AIX3-2.1 is sourced from the original manufacturer or authorized distributors?
All LM4050AIX3-2.1 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 LM4050AIX3-2.1 meets industry standards.
7.What is the process for return or replacement of LM4050AIX3-2.1?
All LM4050AIX3-2.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIX3-2.1, 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 LM4050AIX3-2.1 part is unused and in its original packaging.
Return procedure for LM4050AIX3-2.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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