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Analog Devices Inc./Maxim Integrated LM4050CEM3-2.5+T
- Part No.:
- LM4050CEM3-2.5+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CEM3-2.5+T.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,980
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Product details
Overview
LM4050CEM3-2.5+T from Analog Devices is a precision 2.500 V, 0.5% initial accuracy, 50 ppm/°C temperature coefficient shunt voltage reference in a 3-pin SC70 package. It operates from 60 µA to 15 mA shunt current, delivers 35 µVRMS wideband noise (10 Hz–10 kHz), and is specified over –40°C to +125°C for use in battery-powered instrumentation and industrial sensor signal conditioning.
For engineers reviewing the LM4050CEM3-2.5+T datasheet, LM4050CEM3-2.5+T pinout, LM4050CEM3-2.5+T application, or LM4050CEM3-2.5+T equivalent, key selection criteria include guaranteed 0.5% initial tolerance at +25°C, stable regulation without output capacitors, compatibility with capacitive loads, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LM4050CEM3-2.5+T implements a laser-trimmed bandgap shunt reference architecture that maintains a fixed 2.500 V reverse breakdown voltage across its terminals when biased with 60 µA–15 mA cathode-to-anode current. Its internal pass transistor sinks variable current to hold output voltage constant despite input supply or load variations.
It requires no external stabilization capacitor and remains stable with any output capacitance. The device clamps to ~0.7 V below ground under forward bias up to 10 mA, enabling bidirectional protection in some configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±13 mV (0.5% grade) at +25°C - defines reference accuracy for ADC/DAC biasing and sensor excitation. |
| Tempco | ±50 ppm/°C max (–40°C to +125°C) - ensures ≤ ±12.5 mV drift over full industrial temperature range. |
| Shunt Current Range | 60 µA to 15 mA - supports ultra-low-power portable designs and higher-current analog front-ends. |
| Dynamic Impedance | 0.3 Ω to 0.9 Ω at 1 mA - enables tight regulation under fast load transients (e.g., SAR ADC sampling). |
| Wideband Noise | 35 µVRMS (10 Hz–10 kHz) - suitable for 16-bit precision measurement systems without additional filtering. |
| Long-Term Stability | 120 ppm after 1000 hours - predicts <0.012% output drift over extended field operation. |
| Operating Temp Range | –40°C to +125°C - qualified for under-hood automotive, industrial control, and harsh-environment applications. |
Pinout & Package
LM4050CEM3-2.5+T uses a 3-pin SC70 surface-mount package (1.8 mm × 1.8 mm), 50% smaller than SOT23. Pin 3 is unconnected (N.C.) and must be left floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Positive terminal (anode) | Connected to system ground or low-impedance return path; forms reference node with pin 2. |
| 2 (–) | Negative terminal (cathode) | Reference output node; voltage measured between pins 1 and 2 is 2.500 V under reverse bias. |
| 3 (N.C.) | No connection | Must remain unconnected or shorted to pin 2; no internal bond wire or circuit function. |
Key Features
| Feature | Design Value |
|---|---|
| 0.5% initial accuracy (C grade) | Reduces calibration burden in production test for mid-precision data acquisition systems. |
| SC70-3 ultra-small footprint | Enables high-density PCB layouts in space-constrained portable medical and IoT edge devices. |
| No output capacitor required | Eliminates BOM cost and layout area for stability components; simplifies design validation. |
| Stable with capacitive loads | Allows direct connection to ADC input capacitors or long traces without oscillation risk. |
| AEC-Q100 qualified | Validated for automotive applications including body electronics and ADAS sensor modules. |
Applications
| Portable Instrumentation | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Handheld multimeter using 16-bit sigma-delta ADC for DC voltage measurement. IC Role / Device Role / Timing Role: Provides stable 2.500 V reference for ADC full-scale calibration and ratiometric sensor scaling. Use Value: 0.5% initial tolerance and 50 ppm/°C tempco ensure <±0.1% total error over –10°C to +50°C operating range. |
Use Scenario: Tire pressure monitoring system (TPMS) with MEMS pressure sensor and RF transmitter. IC Role / Device Role / Timing Role: Supplies excitation voltage to bridge-based pressure sensor and reference for on-chip ADC. Use Value: AEC-Q100 qualification and –40°C to +125°C operation guarantee reliability in under-wheel environments. |
| Industrial Process Control | Battery-Powered Data Logger |
|
Use Scenario: 4–20 mA loop-powered transmitter for temperature sensing in factory automation. IC Role / Device Role / Timing Role: Generates precise 2.500 V reference for DAC output stage and sensor signal conditioning. Use Value: 60 µA minimum operating current enables operation down to 3.3 V supply while maintaining regulation. |
Use Scenario: Environmental logger with lithium coin cell, measuring temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Low-power shunt reference for microcontroller's internal ADC and external sensor biasing. Use Value: 35 µVRMS noise and micropower operation extend battery life beyond 2 years at 10 µA average current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4050BEM3-2.5+T | 0.2% initial accuracy (vs. 0.5%), same SC70 package and 50 ppm/°C tempco | Suitable where tighter reference tolerance is needed for 12–14 bit systems without upgrading to A grade | Select for improved accuracy without changing layout or thermal design |
| REF3025AIDBZR | 2.5 V, 0.2% accuracy, 50 ppm/°C, SOT23-3, but higher 100 µA min current and 45 µVRMS noise | Requires higher quiescent current; less optimal for sub-100 µA battery-critical designs | Prefer when existing SOT23 footprint reuse is prioritized over SC70 size reduction |
Compared with LM4050BEM3-2.5+T, the LM4050CEM3-2.5+T trades 0.3% initial accuracy for lower cost and sufficient performance in 12-bit industrial sensors; versus REF3025AIDBZR, it offers lower minimum operating current and identical noise performance in a smaller footprint, but requires SC70 layout adaptation.
Availability
LM4050CEM3-2.5+T is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor interfaces, and industrial process controls requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050CEM3-2.5+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 series was designed as micropower shunt references for space-constrained, battery-operated, and automotive applications demanding precision, stability, and small-footprint packaging.
FAQ
What is the guaranteed initial accuracy of LM4050CEM3-2.5+T at +25°C?
The LM4050CEM3-2.5+T is guaranteed to deliver 2.500 V ±13 mV (±0.5%) at +25°C, corresponding to the C-grade specification per the Analog Devices datasheet Electrical Characteristics table for the 2.500 V variant. This tolerance is laser-trimmed during production and applies before temperature-induced drift.
Does LM4050CEM3-2.5+T require an external output capacitor for stability?
No, the LM4050CEM3-2.5+T does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces - a key advantage over many competing shunt references.
What is the minimum shunt current needed for LM4050CEM3-2.5+T to maintain regulation?
The LM4050CEM3-2.5+T requires a minimum shunt current of 65 µA to maintain regulation across its full operating temperature range (–40°C to +125°C). At +25°C, the minimum is 45 µA, but design must accommodate the worst-case 65 µA requirement for robust operation.
Can LM4050CEM3-2.5+T be used in automotive applications?
Yes, the LM4050CEM3-2.5+T is AEC-Q100 qualified and specified for operation from –40°C to +125°C, making it suitable for automotive applications such as engine control sensors, body electronics, and ADAS subsystems where precision voltage referencing is required under harsh thermal conditions.
What package type and pin configuration does LM4050CEM3-2.5+T use?
The LM4050CEM3-2.5+T uses a 3-pin SC70 surface-mount package (1.8 mm × 1.8 mm) with top-mark "FZTW". Pin 1 is the anode (+), pin 2 is the cathode (–), and pin 3 is unconnected (N.C.) - it must be left floating or tied to pin 2 per the datasheet pin description.
LM4050CEM3-2.5+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050CEM3-2.5+T FAQ
1.How can I place an order for LM4050CEM3-2.5+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CEM3-2.5+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 LM4050CEM3-2.5+T reliable?
The price and inventory of LM4050CEM3-2.5+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CEM3-2.5+T is usually 5 days.
3.What payment methods are accepted for LM4050CEM3-2.5+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CEM3-2.5+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CEM3-2.5+T?
LM4050CEM3-2.5+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CEM3-2.5+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 LM4050CEM3-2.5+T?
For technical support, including LM4050CEM3-2.5+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CEM3-2.5+T requirements.
6.How does Aetrix verify that LM4050CEM3-2.5+T is sourced from the original manufacturer or authorized distributors?
All LM4050CEM3-2.5+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 LM4050CEM3-2.5+T meets industry standards.
7.What is the process for return or replacement of LM4050CEM3-2.5+T?
All LM4050CEM3-2.5+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CEM3-2.5+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 LM4050CEM3-2.5+T part is unused and in its original packaging.
Return procedure for LM4050CEM3-2.5+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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