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Analog Devices Inc./Maxim Integrated LM4050AIM3-2.1+T
- Part No.:
- LM4050AIM3-2.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3-2.1+T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:17,500
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Product details
Overview
LM4050AIM3-2.1+T from Maxim Integrated is a precision 2.048V shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient (typ), 60µA to 15mA operating current range, and 28µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference in portable battery-powered systems requiring high accuracy under varying load and temperature.
For engineers reviewing the LM4050AIM3-2.1+T datasheet, LM4050AIM3-2.1+T pinout, LM4050AIM3-2.1+T application, or LM4050AIM3-2.1+T equivalent, this device supports space-constrained designs where micropower operation, low output noise, and guaranteed -40°C to +125°C performance are critical selection criteria.
Technical Context
The LM4050AIM3-2.1+T uses a bandgap-based shunt architecture to maintain a precise 2.048V reverse breakdown voltage across its terminals when biased with 60µA–15mA cathode-to-anode current. Its internal laser-trimmed resistor network ensures 0.1% initial tolerance at +25°C, and it operates without external stabilization capacitors while remaining stable with any capacitive load.
Designed for high-reliability embedded systems, the device delivers ±15ppm/°C typical temperature coefficient over -40°C to +125°C and exhibits low dynamic impedance (≤0.8Ω at 1mA), enabling accurate regulation despite supply and load transients. Pin 3 is unconnected (N.C.) and must be left floating or tied to pin 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V nominal; tight tolerance enables direct interface with 12-bit ADCs and DACs requiring ≤1 LSB error at 2.048V full-scale. |
| Initial Accuracy | ±2.0mV (0.1%) at +25°C; eliminates need for system-level calibration in precision sensor front-ends. |
| Tempco | ±15ppm/°C typical; ensures ≤±0.205mV drift over full -40°C to +125°C range, critical for industrial process controls. |
| Operating Current | 60µA to 15mA shunt current; supports ultra-low-power sleep modes and high-current regulation in same design. |
| Output Noise | 28µVRMS (10Hz–10kHz); low enough to avoid degrading SNR in 16-bit data acquisition systems. |
| Dynamic Impedance | ≤0.8Ω at 1mA; minimizes output voltage shift during load transients, improving stability in switching power supply references. |
| Long-Term Stability | 120ppm over 1000h; predictable aging behavior supports 10+ year reliability in medical and infrastructure equipment. |
Pinout & Package
Package: SC70-3 (1.8mm × 1.8mm surface-mount), RoHS-compliant, lead-free (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Cathode Reference Terminal | Connects to system ground or low-impedance return path; defines reference potential for shunt operation. |
| Pin 2 (−) | Cathode / Output Terminal | Provides regulated 2.048V output; sinks all shunt current (ISHUNT) and load current (ILOAD) combined. |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or tied to pin 2; not internally bonded-floating connection avoids parasitic leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area-50% smaller than SOT23-3, enabling high-density PCB layouts in handheld devices. |
| No output capacitor required | Internally compensated for stability with any capacitive load; eliminates BOM cost and layout risk of external COUT. |
| Tolerates capacitive loads | Stable with 0–1µF output capacitance; supports direct buffering into ADC sample-and-hold inputs without oscillation. |
| Micropower minimum operating current | 60µA lower limit enables operation from coin-cell batteries or energy-harvesting sources with µA-level quiescent budgets. |
| Guaranteed wide temperature range | Specified from -40°C to +125°C; qualified for automotive under-hood and industrial motor drive applications. |
Applications
| Portable Medical Sensors | Notebook Computer Power Management |
|---|---|
Use Scenario: Battery-powered glucose meter with 16-bit SAR ADC measuring analog sensor output. IC Role / Device Role / Timing Role: Provides 2.048V reference for ADC full-scale range, directly matching common 2.048V digital codes. Use Value: 0.1% initial accuracy and ±15ppm/°C tempco ensure <±0.5 LSB total error across operating temperature, meeting ISO 15197 clinical accuracy requirements. | Use Scenario: Voltage margining and sequencing control in multi-rail CPU core/VDDIO power delivery. IC Role / Device Role / Timing Role: Supplies stable reference to precision DACs controlling PMIC feedback loops. Use Value: Low 28µVRMS noise prevents injection of reference jitter into sensitive analog control paths, maintaining tight voltage regulation tolerance. |
| Industrial PLC Analog Input Modules | Automotive Body Control Units |
Use Scenario: 4–20mA transmitter conditioning circuit with cold-junction compensation for thermocouple interfaces. IC Role / Device Role / Timing Role: References instrumentation amplifier gain-setting resistors and ADC input range. Use Value: Guaranteed -40°C to +125°C operation and 120ppm long-term stability enable 15-year field deployment without recalibration in harsh factory environments. | Use Scenario: Cabin temperature sensor signal conditioning in HVAC control module. IC Role / Device Role / Timing Role: Supplies reference to microcontroller's internal ADC for analog sensor digitization. Use Value: SC70-3 size allows placement directly adjacent to MCU, minimizing trace length and EMI susceptibility in compact BCM PCBs. |
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) vs. fixed 2.048V; higher 100µA min current; 100ppm/°C max tempco. | Requires external resistor divider for 2.048V; less suitable for space-constrained fixed-voltage use cases. | Select TLVH431AIDBZR only if adjustable output or higher current capability is needed; not drop-in for LM4050AIM3-2.1+T. |
| REF3020AIDBZR | Series topology (not shunt); 2.048V fixed; 50µA max quiescent current; 50ppm/°C max tempco. | Requires dedicated supply rail; cannot sink load current; incompatible with shunt-based biasing topologies. | Choose REF3020AIDBZR only when series-reference architecture is acceptable and board space permits larger SOT23-5 package. |
Compared with TLVH431AIDBZR and REF3020AIDBZR, the LM4050AIM3-2.1+T offers true fixed 2.048V output with shunt operation, enabling simpler two-terminal biasing, lower minimum current, and superior temperature stability-making it optimal for compact, battery-sensitive, and high-accuracy analog signal chains.
Availability
LM4050AIM3-2.1+T is available at Aetrix Electronics and suitable for portable medical sensors, notebook computer power management, industrial PLC analog input modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050AIM3-2.1+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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing 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 exact output voltage tolerance of LM4050AIM3-2.1+T at +25°C?
The LM4050AIM3-2.1+T has a guaranteed initial accuracy of ±0.1% at +25°C, corresponding to ±2.0mV around the nominal 2.048V output. This is specified for the 'A' grade variant and confirmed in the Electrical Characteristics table for 2.048V devices under TA = +25°C conditions.
Can LM4050AIM3-2.1+T operate without an external capacitor?
Yes, the LM4050AIM3-2.1+T does not require an external output capacitor for stability and remains stable with any capacitive load from 0 to 1µF. This eliminates BOM components and simplifies layout in noise-sensitive applications such as precision data acquisition.
What is the minimum operating current for LM4050AIM3-2.1+T?
The LM4050AIM3-2.1+T requires a minimum shunt current of 60µA to maintain regulation. Below this threshold, output voltage accuracy degrades significantly. The device is rated for continuous operation from 60µA up to 15mA, supporting both ultra-low-power and moderate-current applications.
Is LM4050AIM3-2.1+T compatible with lead-free soldering processes?
Yes, the '+T' suffix indicates LM4050AIM3-2.1+T is RoHS-compliant and qualified for lead-free reflow soldering per JEDEC J-STD-020. Its SC70-3 package supports peak reflow temperatures up to +260°C, and the device meets MSL Level 1 moisture sensitivity requirements.
How does LM4050AIM3-2.1+T handle temperature variation across its full operating range?
The LM4050AIM3-2.1+T guarantees a maximum temperature coefficient of 50ppm/°C and typically performs at ±15ppm/°C over -40°C to +125°C. For a 2.048V output, this translates to ≤±0.205mV total drift across the full range-enabling high-accuracy measurements without software compensation in industrial environments.
LM4050AIM3-2.1+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):
- 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+T FAQ
1.How can I place an order for LM4050AIM3-2.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3-2.1+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 LM4050AIM3-2.1+T reliable?
The price and inventory of LM4050AIM3-2.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3-2.1+T is usually 5 days.
3.What payment methods are accepted for LM4050AIM3-2.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3-2.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3-2.1+T?
LM4050AIM3-2.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3-2.1+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 LM4050AIM3-2.1+T?
For technical support, including LM4050AIM3-2.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3-2.1+T requirements.
6.How does Aetrix verify that LM4050AIM3-2.1+T is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3-2.1+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 LM4050AIM3-2.1+T meets industry standards.
7.What is the process for return or replacement of LM4050AIM3-2.1+T?
All LM4050AIM3-2.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3-2.1+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 LM4050AIM3-2.1+T part is unused and in its original packaging.
Return procedure for LM4050AIM3-2.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AIM3-2.1+T Tags
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