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Analog Devices Inc./Maxim Integrated LM4050AIM3-2.1
- Part No.:
- LM4050AIM3-2.1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3-2.1.pdf
- Description:
- LM4050 50PPM PER DEGREE CELSIUS
- Quantity:
- Payment:
- Shipping:
Inventory:1,815
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Product details
Overview
LM4050AIM3-2.1 from Maxim Integrated is a precision 2.048V shunt voltage reference in SOT23-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +125°C, 60µA–15mA operating current range, and 28µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference for ADCs, DACs, and power-supply monitoring in portable battery-powered systems.
For engineers reviewing the LM4050AIM3-2.1 datasheet, LM4050AIM3-2.1 pinout, LM4050AIM3-2.1 application, or LM4050AIM3-2.1 equivalent, key selection criteria include guaranteed 0.1% tolerance at +25°C, SC70/SOT23 package compatibility, no external capacitor requirement, and stability under capacitive loads up to 15mA shunt current.
Technical Context
The LM4050AIM3-2.1 uses a laser-trimmed bandgap core with BiCMOS process to deliver fixed 2.048V reverse breakdown voltage. Its two-terminal shunt architecture operates by sinking variable current through an external series resistor to maintain regulation across load and supply variations.
It achieves ±15ppm/°C tempco via on-chip curvature compensation and exhibits low dynamic impedance (≤0.8Ω at 1mA), enabling stable output under fast load transients. The device tolerates any output capacitance and requires no stabilization capacitor - a key differentiator versus older shunt references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V nominal; tight match to 12-bit DAC/ADC full-scale reference points. |
| Initial Accuracy | ±2.0mV (0.1%) at +25°C; enables single-point calibration in high-precision sensor signal chains. |
| Tempco | ±15ppm/°C max over –40°C to +125°C; contributes ≤±1.5mV drift across full industrial range. |
| Operating Current | 60µA to 15mA; supports ultra-low-power sleep modes and high-current regulation without external biasing. |
| Output Noise | 28µVRMS (10Hz–10kHz); suitable for 16-bit SAR ADC reference without added filtering. |
| Dynamic Impedance | 0.3–0.8Ω at 1mA; ensures <1mV output shift during 1mA load steps, critical for closed-loop feedback stability. |
| Long-Term Stability | 120ppm after 1000h; predictable aging behavior for medical and test equipment requiring recalibration intervals. |
Pinout & Package
LM4050AIM3-2.1 is housed in a 3-pin SOT23-3 surface-mount package (2.92mm × 1.3mm × 1.0mm), optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Reference Output | Positive terminal of shunt reference; connects to load and feedback node in regulator circuits. |
| 2 (−) | Cathode / Ground Reference | Negative terminal; ties to system ground or return path; defines 0V reference point for VR. |
| 3 (N.C.) | No Connection | Must be left floating or tied to Pin 2; not internally connected - avoids parasitic leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| 0.1% Initial Accuracy | Reduces or eliminates system-level trimming in factory calibration for portable instrumentation. |
| No Output Capacitor Required | Eliminates BOM cost and board area for stability capacitor; simplifies layout in wearables and IoT nodes. |
| Tolerates Capacitive Loads | Enables direct connection to ADC input caps or LDO bypass networks without oscillation risk. |
| Ultra-Low 28µVRMS Noise | Preserves ENOB in 16-bit data converters without adding external low-noise buffers. |
| 60µA Minimum Operating Current | Supports operation from coin-cell batteries (e.g., CR2032) with >10-year shelf life in standby mode. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) analog front-end conditioning weak electrochemical signals. IC Role / Device Role / Timing Role: Precision 2.048V reference for 12-bit ADC digitizing sensor output. Use Value: 0.1% accuracy and ±15ppm/°C tempco ensure <±0.5% total measurement error across body-temperature range (32–42°C). | Use Scenario: Environmental sensor node logging temperature/humidity every 5 minutes using microcontroller with internal ADC. IC Role / Device Role / Timing Role: Stable reference for MCU's 10-bit SAR ADC during intermittent wake cycles. Use Value: 60µA min operating current enables >5-year operation on AA alkaline cells; no capacitor saves PCB area. |
| Industrial Process Transmitters | USB-Powered Test Equipment |
Use Scenario: 4–20mA loop-powered pressure transmitter with HART modulation capability. IC Role / Device Role / Timing Role: Shunt reference for DAC generating precise loop current setpoint. Use Value: 15mA shunt-current capability supports full 20mA loop drive while maintaining regulation; 125°C rating suits enclosure-mounted designs. | Use Scenario: USB-powered oscilloscope probe with integrated 12-bit ADC and FPGA-based signal processing. IC Role / Device Role / Timing Role: Primary reference for dual-channel simultaneous sampling ADC subsystem. Use Value: 28µVRMS noise and low dynamic impedance prevent SNR degradation when driving ADC sample-and-hold inputs directly. |
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 min), 0.5% initial accuracy, higher 100ppm/°C tempco, SOT23-3 | Requires external resistors to set 2.048V; less accurate and less stable over temperature | Use only if adjustable output and lower cost outweigh need for precision and stability. |
| REF3020AIDBZR | 2.048V fixed, 0.2% initial accuracy, 50ppm/°C tempco, SOT23-3, 50µA–25mA | Slightly looser accuracy and higher tempco; higher max current but larger quiescent headroom | Preferred when wider current range is needed and 0.2% tolerance is acceptable. |
Compared with TLVH431AIDBZR and REF3020AIDBZR, LM4050AIM3-2.1 delivers superior 0.1% accuracy and ±15ppm/°C tempco in the same SOT23-3 footprint - critical for metrology-grade measurements where calibration drift must be minimized.
Availability
LM4050AIM3-2.1 is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and RoHS-compliant sourcing.
Supply support for LM4050AIM3-2.1 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, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The LM4050 series targets space-constrained, high-accuracy voltage reference needs in battery-operated and thermally variable environments - delivering micropower operation without sacrificing stability or precision.
FAQ
What is the guaranteed initial accuracy of LM4050AIM3-2.1 at +25°C?
The LM4050AIM3-2.1 is specified with ±2.0mV (0.1%) initial accuracy at +25°C per the A-grade binning. This value is 100% production tested and guaranteed - not typical - ensuring consistent performance without post-manufacturing sorting or calibration.
Does LM4050AIM3-2.1 require an external output capacitor for stability?
No, LM4050AIM3-2.1 does not require an external output capacitor. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or LDO bypass networks - eliminating a common BOM item and layout constraint.
What is the minimum operating current for LM4050AIM3-2.1 across temperature?
The LM4050AIM3-2.1 guarantees operation down to 60µA across its full –40°C to +125°C range. At –40°C, the minimum current remains 60µA, enabling reliable startup and regulation in cold-environment applications like outdoor industrial sensors.
Can LM4050AIM3-2.1 be used in place of a 2.048V series reference?
LM4050AIM3-2.1 is a shunt reference and cannot directly replace a series reference without circuit redesign. It requires an external series resistor to establish operating current and regulates by sinking excess current - unlike series references that source current into the load.
What is the maximum junction temperature and thermal derating for LM4050AIM3-2.1 in SOT23-3 package?
The LM4050AIM3-2.1 has a maximum junction temperature of +150°C. In SOT23-3, it dissipates up to 320mW at +70°C ambient, with derating at 4.01mW/°C above that. At 15mA and 2.048V, power dissipation is ~31mW - well within safe limits even at +125°C ambient.
LM4050AIM3-2.1 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):
- 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:
- SOT-23-3
LM4050AIM3-2.1 FAQ
1.How can I place an order for LM4050AIM3-2.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3-2.1 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 LM4050AIM3-2.1 reliable?
The price and inventory of LM4050AIM3-2.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3-2.1 is usually 5 days.
3.What payment methods are accepted for LM4050AIM3-2.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3-2.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3-2.1?
LM4050AIM3-2.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3-2.1 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 LM4050AIM3-2.1?
For technical support, including LM4050AIM3-2.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3-2.1 requirements.
6.How does Aetrix verify that LM4050AIM3-2.1 is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3-2.1 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 LM4050AIM3-2.1 meets industry standards.
7.What is the process for return or replacement of LM4050AIM3-2.1?
All LM4050AIM3-2.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3-2.1, 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 LM4050AIM3-2.1 part is unused and in its original packaging.
Return procedure for LM4050AIM3-2.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AIM3-2.1 Tags
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