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Analog Devices Inc./Maxim Integrated LM4050AIM3-3.0-T
- Part No.:
- LM4050AIM3-3.0-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3-3.0-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
LM4050AIM3-3.0-T from Maxim Integrated is a precision 3.000V, two-terminal shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient (max), 60µA–15mA operating current range, and 45µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference in battery-powered ADCs, portable instrumentation, and industrial sensor signal conditioning circuits.
For engineers reviewing the LM4050AIM3-3.0-T datasheet, LM4050AIM3-3.0-T pinout, LM4050AIM3-3.0-T application, or LM4050AIM3-3.0-T equivalent, this page delivers verified electrical specs, validated SC70-3 terminal mapping, real-world use cases, and technically differentiated alternatives for high-accuracy analog design.
Technical Context
The LM4050AIM3-3.0-T uses laser-trimmed bandgap circuitry to maintain a fixed 3.000V reverse breakdown voltage across its anode and cathode terminals. Its BiCMOS process enables low dynamic impedance (0.3–0.8Ω) and stable regulation without external capacitors, even under capacitive loads.
It operates over –40°C to +125°C with guaranteed 0.1% initial tolerance and ≤50ppm/°C total tempco over full temperature range. The device sinks current (60µA–15mA) to clamp voltage, functioning as a two-terminal shunt regulator - not requiring a ground reference or supply rail connection beyond its own terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±3.0mV at +25°C (A-grade); defines precise reference level for 12-bit+ ADCs and DACs |
| Initial Accuracy | ±0.1% (±3.0mV) at +25°C; enables single-point calibration in portable measurement systems |
| Tempco | ±15ppm/°C typical, ≤50ppm/°C over –40°C to +125°C; ensures <±1.5mV drift across full industrial range |
| Operating Current | 60µA minimum to 15mA maximum; supports micropower sleep modes and high-current load regulation |
| Output Noise | 45µVRMS (10Hz–10kHz); low enough for 16-bit SAR ADC reference without filtering |
| Dynamic Impedance | 0.3–0.8Ω at 1mA/120Hz; maintains voltage stability during fast load transients |
| Long-Term Stability | 120ppm after 1000 hours; predictable aging behavior for mission-critical calibration references |
Pinout & Package
LM4050AIM3-3.0-T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode (cathode-side reference output) | Positive terminal of shunt reference; connects to regulated node or ADC REF+ input |
| Pin 2 (−) | Cathode (reference return path) | Negative terminal; forms current sink path to system ground or bias network |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or shorted to Pin 2; no internal function or signal routing |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% board space vs. SOT23; ideal for wearables and compact modules |
| No output capacitor required | Internally compensated for stability with any capacitive load; eliminates BOM cost and layout risk |
| Wide shunt current range | 60µA–15mA operation enables direct use in both ultra-low-power sensors and higher-current analog front-ends |
| Laser-trimmed accuracy | 0.1% initial tolerance achieved via on-die resistor trimming; avoids post-assembly calibration |
| High-temp rated performance | Guaranteed spec compliance from –40°C to +125°C; suitable for automotive under-hood and industrial control |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental sensor nodes measuring temperature, humidity, and pressure over multi-year deployments. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.000V excitation and ADC reference for ratiometric measurements. Use Value: 0.1% initial accuracy and ±15ppm/°C tempco ensure <±0.5% total measurement error across –20°C to +70°C ambient range. |
Use Scenario: 4–20mA loop-powered field transmitters converting RTD or strain gauge outputs to standardized current signals. IC Role / Device Role / Timing Role: Precision voltage reference for the transmitter's analog signal chain and DAC feedback path. Use Value: Low 45µVRMS noise prevents quantization uncertainty in 16-bit DACs; SC70 size fits tight PCB layouts near sensor interfaces. |
| Medical Point-of-Care Devices | Automotive Cabin Sensors |
|
Use Scenario: Handheld blood glucose meters and pulse oximeters requiring FDA-compliant analog accuracy and low power consumption. IC Role / Device Role / Timing Role: Reference source for low-noise instrumentation amplifiers and SAR ADCs sampling biosignals. Use Value: 60µA minimum operating current extends battery life; 120ppm long-term stability supports 5-year device calibration intervals. |
Use Scenario: Occupancy, CO₂, and air quality sensors mounted inside vehicle cabins operating from 12V battery with wide thermal swings. IC Role / Device Role / Timing Role: Stable 3.000V reference for microcontroller ADCs monitoring analog sensor outputs. Use Value: Guaranteed –40°C to +125°C operation ensures reliability during cold starts and hot-soak conditions; A-grade accuracy reduces software compensation overhead. |
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 (2.5V–36V) 3-terminal shunt; 0.5% initial accuracy; 90ppm/°C tempco; requires external resistors | Used where programmability or higher voltage is needed; less accurate and noisier (120µVRMS) | Select when flexibility outweighs precision; avoid for fixed 3.000V metrology-grade use |
| ADR3430ARJZ-R7 | 3.0V series reference in SOT23; 0.1% accuracy; 10ppm/°C tempco; requires supply rail and ground; 3.5µA quiescent current | Suitable for low-dropout, rail-to-rail systems; cannot sink current like a shunt device | Choose only if system topology mandates series architecture; incompatible with shunt-based bias networks |
Compared with TLVH431ACDBVR and ADR3430ARJZ-R7, LM4050AIM3-3.0-T offers superior noise performance (45µVRMS vs. ≥120µVRMS), true two-terminal simplicity, and tighter tempco consistency across temperature extremes - making it optimal for space-constrained, battery-operated precision analog systems.
Availability
LM4050AIM3-3.0-T is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, and automotive cabin monitoring systems requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050AIM3-3.0-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 high-performance analog and mixed-signal ICs for precision, power, and interface applications in industrial, medical, and communications markets.
The LM4050/LM4051 family was engineered specifically for space-constrained, battery-powered systems needing stable, low-drift, two-terminal voltage references - emphasizing micropower operation, SC70 miniaturization, and robustness across extended temperature ranges.
FAQ
What is the exact output voltage tolerance of LM4050AIM3-3.0-T at +25°C?
The LM4050AIM3-3.0-T is an A-grade device with a nominal output voltage of 3.000V and a guaranteed tolerance of ±3.0mV (±0.1%) at +25°C. This value is laser-trimmed and specified in the Electrical Characteristics table for the 3.000V variant under TA = +25°C conditions.
Does LM4050AIM3-3.0-T require an external capacitor for stability?
No, LM4050AIM3-3.0-T does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks - eliminating capacitor-related BOM cost and layout sensitivity.
What is the minimum operating current for LM4050AIM3-3.0-T?
The minimum operating current for LM4050AIM3-3.0-T is 67µA, as specified in the 3.000V Electrical Characteristics table. Operation below this current may result in loss of regulation or increased output voltage drift; design must ensure ISHUNT ≥ 67µA across all operating conditions.
Can Pin 3 of LM4050AIM3-3.0-T be left unconnected?
Yes - Pin 3 of LM4050AIM3-3.0-T is designated N.C. (No Connection) and must either be left floating or connected directly to Pin 2 (cathode). The datasheet explicitly prohibits connecting Pin 3 to any other node, as it has no internal function and misconnection risks functional instability.
What is the wideband noise specification for LM4050AIM3-3.0-T?
The wideband noise of LM4050AIM3-3.0-T is 45µVRMS, measured over 10Hz to 10kHz at IR = 100µA. This low noise floor supports high-resolution data acquisition systems, including 16-bit SAR ADCs, without requiring additional filtering stages in the reference path.
LM4050AIM3-3.0-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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AIM3-3.0-T FAQ
1.How can I place an order for LM4050AIM3-3.0-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3-3.0-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 LM4050AIM3-3.0-T reliable?
The price and inventory of LM4050AIM3-3.0-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3-3.0-T is usually 5 days.
3.What payment methods are accepted for LM4050AIM3-3.0-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3-3.0-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3-3.0-T?
LM4050AIM3-3.0-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3-3.0-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 LM4050AIM3-3.0-T?
For technical support, including LM4050AIM3-3.0-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3-3.0-T requirements.
6.How does Aetrix verify that LM4050AIM3-3.0-T is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3-3.0-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 LM4050AIM3-3.0-T meets industry standards.
7.What is the process for return or replacement of LM4050AIM3-3.0-T?
All LM4050AIM3-3.0-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3-3.0-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 LM4050AIM3-3.0-T part is unused and in its original packaging.
Return procedure for LM4050AIM3-3.0-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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