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Analog Devices Inc./Maxim Integrated LM4050CEM3-4.1+T
- Part No.:
- LM4050CEM3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- -
- Datasheet:
-
LM4050CEM3-4.1+T.pdf
- Description:
- IC VREF SHUNT 4.096V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,330
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Product details
Overview
LM4050CEM3-4.1+T from Analog Devices is a precision 4.096V, 0.5% initial accuracy, 50ppm/°C temperature coefficient shunt voltage reference in a 3-pin SC70 package. It operates over -40°C to +125°C with 73µA minimum shunt current and 15mA max shunt current, delivering stable reference voltage for high-resolution ADCs and DACs in battery-powered instrumentation.
For engineers reviewing the LM4050CEM3-4.1+T datasheet, LM4050CEM3-4.1+T pinout, LM4050CEM3-4.1+T application, or LM4050CEM3-4.1+T equivalent, key selection criteria include guaranteed 4.096V output tolerance (±20mV at +25°C), low 64µVRMS wideband noise (10Hz–10kHz), no external capacitor requirement, and AEC-Q100 qualification for automotive use cases.
Technical Context
The LM4050CEM3-4.1+T implements a laser-trimmed bandgap core with two-terminal shunt topology, sinking current from a series resistor to maintain fixed reverse breakdown voltage. Its internal architecture ensures stable regulation across 73µA to 15mA shunt current range without oscillation under capacitive loads up to 1µF.
Guaranteed performance includes ±50ppm/°C tempco over full -40°C to +125°C range, 1.0mV reverse voltage change from 73µA to 1mA operating current, and 1.0Ω typical dynamic impedance at 1mA/120Hz - enabling precise biasing in low-power sensor signal chains and data acquisition front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±20mV (±0.5%) tolerance at +25°C ensures accurate scaling for 12-bit ADC references. |
| Initial Accuracy | 0.5% max; guarantees worst-case deviation ≤±20.5mV at room temperature for production calibration margin. |
| Tempco | 50ppm/°C max over -40°C to +125°C; contributes ≤±20.5mV drift across full temperature range. |
| Shunt Current Range | 73µA min to 15mA max; supports ultra-low-power sensor nodes and higher-current precision regulators. |
| Wideband Noise | 64µVRMS (10Hz–10kHz); enables <12-bit ENOB preservation in 16-bit SAR ADC reference paths. |
| Dynamic Impedance | 1.0Ω typical at 1mA/120Hz; minimizes load-induced voltage shift in varying-current applications. |
| Long-Term Stability | 120ppm after 1000h; ensures <0.012% output drift over 1-year operation in industrial monitoring systems. |
Pinout & Package
LM4050CEM3-4.1+T uses a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is NC (no connection) and must be left unconnected or tied to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Positive terminal (anode) | Connects to system ground or low-impedance return path; forms cathode-to-anode reverse bias path. |
| Pin 2 (–) | Negative terminal (cathode) | Reference output node; sinks shunt current to maintain 4.096V across load and series resistor. |
| Pin 3 (N.C.) | No connection | Must remain floating or shorted to Pin 2; no internal circuitry - prevents parasitic coupling or layout errors. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70 package | 1.8mm × 1.8mm footprint saves >50% board area vs. SOT23 - critical for portable medical and wearables. |
| No output capacitor required | Stable with any capacitive load (0–1µF); eliminates BOM cost and layout constraints in space-constrained designs. |
| AEC-Q100 qualified | Rated for automotive applications per /V versions; LM4050CEM3-4.1+T shares same process and reliability screening. |
| Low micropower operation | 73µA minimum shunt current enables operation from coin cells or energy-harvesting sources. |
| High-temperature operation | Specified from -40°C to +125°C ambient; supports under-hood and industrial control environments. |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
|
Use Scenario: Battery-powered environmental monitors logging temperature/humidity with 16-bit ADCs. IC Role / Device Role / Timing Role: Shunt reference providing 4.096V reference for ADC VREF input, replacing larger 3-terminal references. Use Value: Enables 12-bit effective resolution with 64µVRMS noise and 0.5% initial accuracy - sufficient for ±0.1°C thermistor measurement. |
Use Scenario: Occupancy detection using MEMS accelerometers and pressure sensors in HVAC control modules. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end signal conditioning and sensor excitation. Use Value: 50ppm/°C tempco ensures <±0.2% reference drift over cabin temperature range (-40°C to +85°C), maintaining sensor linearity. |
| Industrial Process Transmitters | Medical Wearable Biosensors |
|
Use Scenario: 4–20mA loop-powered field transmitters measuring flow or pressure in hazardous areas. IC Role / Device Role / Timing Role: Two-terminal shunt reference regulating loop current while providing stable 4.096V for internal DACs and microcontrollers. Use Value: 15mA max shunt current supports full 20mA loop compliance; SC70 size fits tight PCB real estate in explosion-proof enclosures. |
Use Scenario: ECG/PPG patch devices requiring ultra-low-power, high-accuracy analog signal chain. IC Role / Device Role / Timing Role: Low-noise reference for 12-bit SAR ADC sampling biopotential signals at 1kSPS. Use Value: 64µVRMS noise and 73µA min current allow operation from 3.6V Li-ion for >7 days without compromising SNR or battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C41IDBZR | 4.096V, 0.5% accuracy, SOT23-3, 100ppm/°C tempco (vs. 50ppm/°C), 60µA–15mA current range | Higher tempco limits use in extended-temperature industrial environments; lower cost for non-critical applications | Select when budget constraints outweigh tempco requirements and SOT23 footprint is acceptable |
| ADR3440ARJZ-R7 | 4.096V, 0.1% accuracy, SC70-5, 10ppm/°C tempco, 200µA–10mA current range, 3.5µVRMS noise | Lower noise and tighter accuracy suit metrology-grade instruments; higher quiescent current excludes ultra-low-power use | Select when sub-10ppm/°C stability and <4µVRMS noise are mandatory, and 200µA min current is acceptable |
Compared with LM4040C41IDBZR, LM4050CEM3-4.1+T offers half the tempco for better thermal stability in automotive cabins; compared with ADR3440ARJZ-R7, it trades 3.5µVRMS noise for 73µA min current - making it optimal for battery-operated field instruments needing robustness over ultra-fine resolution.
Availability
LM4050CEM3-4.1+T is available at Aetrix Electronics and suitable for portable data loggers, automotive cabin sensors, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050CEM3-4.1+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The LM4050/LM4051 family was designed specifically for space-constrained, high-accuracy voltage reference needs in portable, automotive, and industrial systems - emphasizing micropower operation, small footprint, and AEC-Q100 compliance.
FAQ
What is the exact output voltage tolerance of LM4050CEM3-4.1+T at +25°C?
The LM4050CEM3-4.1+T has a nominal output voltage of 4.096V with ±20mV (±0.5%) tolerance at +25°C, as specified in the Electrical Characteristics table for the C-grade device. This corresponds to a guaranteed range of 4.076V to 4.116V under standard test conditions with 100µA shunt current.
Does LM4050CEM3-4.1+T require an external output capacitor for stability?
No, LM4050CEM3-4.1+T does not require an external output capacitor. Its internal design ensures stability with any capacitive load from 0 to 1µF, eliminating the need for additional components and simplifying layout in compact PCB designs.
What is the minimum shunt current needed for LM4050CEM3-4.1+T to regulate properly?
The LM4050CEM3-4.1+T requires a minimum shunt current of 73µA to maintain regulation across its full temperature range. Below this threshold, output voltage may deviate beyond specification - design must ensure series resistor and supply voltage combinations sustain ≥73µA under worst-case conditions.
Is LM4050CEM3-4.1+T qualified for automotive applications?
Yes, LM4050CEM3-4.1+T is manufactured on the same AEC-Q100 qualified process as the /V automotive variants. While the +T suffix denotes tape-and-reel packaging rather than automotive screening, its electrical specs, temperature range (-40°C to +125°C), and reliability data align with automotive subsystem requirements.
How does the 50ppm/°C temperature coefficient affect LM4050CEM3-4.1+T in a 0°C to 70°C operating environment?
In a 0°C to 70°C ambient range, the LM4050CEM3-4.1+T's 50ppm/°C tempco contributes ≤±3.5mV (±0.085%) additional error beyond its ±20mV room-temperature tolerance - resulting in a total worst-case output variation of ±23.5mV, well within 12-bit ADC reference error budgets.
LM4050CEM3-4.1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- -
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
LM4050CEM3-4.1+T FAQ
1.How can I place an order for LM4050CEM3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CEM3-4.1+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 LM4050CEM3-4.1+T reliable?
The price and inventory of LM4050CEM3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CEM3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4050CEM3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CEM3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CEM3-4.1+T?
LM4050CEM3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CEM3-4.1+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 LM4050CEM3-4.1+T?
For technical support, including LM4050CEM3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CEM3-4.1+T requirements.
6.How does Aetrix verify that LM4050CEM3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4050CEM3-4.1+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 LM4050CEM3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4050CEM3-4.1+T?
All LM4050CEM3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CEM3-4.1+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 LM4050CEM3-4.1+T part is unused and in its original packaging.
Return procedure for LM4050CEM3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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