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Analog Devices Inc./Maxim Integrated LM4050CEX3-3.3/V+T
- Part No.:
- LM4050CEX3-3.3/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050CEX3-3.3/V+T.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,498
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Product details
Overview
LM4050CEX3-3.3/V+T from Analog Devices is a precision 3.3V shunt voltage reference in a 3-pin SC70 package, delivering ±0.5% initial accuracy, 50ppm/°C max temperature coefficient, and stable operation from −40°C to +125°C. It sinks 60µA–15mA reverse current with 0.9Ω dynamic impedance and 50µVRMS wideband noise (10Hz–10kHz), enabling high-accuracy ADC/DAC biasing in automotive sensor modules.
For engineers reviewing the LM4050CEX3-3.3/V+T datasheet, LM4050CEX3-3.3/V+T pinout, LM4050CEX3-3.3/V+T application, or LM4050CEX3-3.3/V+T equivalent, key selection criteria include guaranteed AEC-Q100 qualification, no-output-capacitor stability, ultra-small footprint (1.8mm × 1.8mm), and compatibility with capacitive loads up to 1µF without oscillation.
Technical Context
The LM4050CEX3-3.3/V+T uses a laser-trimmed bandgap core to maintain a precise 3.3000V reverse breakdown voltage at 100µA, with tolerance of ±15mV (±0.5%) at +25°C and ±30mV over −40°C to +125°C. Its two-terminal shunt architecture requires only an external series resistor for regulation and operates without output capacitance.
It exhibits low dynamic impedance (0.3–0.9Ω) across 1mA shunt current and 120Hz test frequency, and maintains <1.0mV reverse voltage change over 1mA ≤ ISHUNT ≤ 15mA. Temperature drift is bounded by ±50ppm/°C maximum, with typical performance within ±15ppm/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3000V ±15mV at +25°C; ±30mV over full −40°C to +125°C range - enables direct replacement of 3.3V LDO references in space-constrained systems |
| Initial Accuracy | ±0.5% (Grade C) - supports 12-bit ADC reference accuracy without trimming |
| Tempco | 50ppm/°C max - ensures ≤±3.3mV total drift over 100°C span, critical for automotive under-hood sensors |
| Shunt Current Range | 60µA to 15mA - allows use with high-impedance bias networks or low-RS power rails |
| Dynamic Impedance | 0.9Ω max at 1mA, 120Hz - minimizes load-induced voltage error in varying-current applications |
| Wideband Noise | 50µVRMS (10Hz–10kHz) - suitable for precision 16-bit SAR ADCs requiring clean analog reference |
| Long-Term Stability | 120ppm after 1000h - ensures reference drift remains below 0.4mV over product lifetime |
Pinout & Package
LM4050CEX3-3.3/V+T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm, 0.95mm height), with thermal resistance θJA = 340.4°C/W on a four-layer board. Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode (positive terminal) | Connects to system ground or low-impedance return path; serves as reference output node |
| Pin 2 (−) | Cathode (negative terminal) | Connected to supply rail via series resistor RS; reverse-biased to establish 3.3V reference |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; no internal function - prevents misrouting in layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications per /V suffix; validated for −40°C to +125°C operation with full parametric guarantees |
| No output capacitor required | Internally compensated for stability with any capacitive load (0–1µF), eliminating BOM cost and PCB area for external COUT |
| Ultra-small SC70 package | 50% smaller than SOT23 equivalents - saves >0.5mm² board area in portable and wearable designs |
| Tolerates capacitive loads | Stable with up to 1µF output capacitance, enabling direct interface to switched-capacitor circuits or noisy digital supplies |
| Micropower operation | Minimum operating current of 60µA - extends battery life in always-on sensor nodes and IoT edge devices |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: High-accuracy temperature and pressure sensing in HVAC control modules under engine bay thermal cycling. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.3V bias for 12-bit delta-sigma ADC front-end. Use Value: ±30mV total voltage drift over −40°C to +125°C ensures ≤0.1% measurement error without calibration. | Use Scenario: Battery-powered ECG and pulse oximeter units requiring long runtime and clinical-grade signal fidelity. IC Role / Device Role / Timing Role: Precision reference for low-noise instrumentation amplifier and SAR ADC signal chain. Use Value: 50µVRMS noise and 60µA min current enable >90dB SNR with 3.3V supply and 10-year shelf-life stability. |
| Industrial PLC Analog Inputs | Smart Meter Reference Subsystem |
Use Scenario: Modular I/O cards in programmable logic controllers measuring 4–20mA loop signals across wide ambient ranges. IC Role / Device Role / Timing Role: Two-terminal shunt reference establishing accurate 3.3V reference for isolated sigma-delta ADCs. Use Value: 0.9Ω dynamic impedance ensures <0.3mV error during transient load steps, maintaining ENOB ≥13.5 bits. | Use Scenario: Revenue-grade electricity meters needing metrology-grade voltage reference traceable to national standards. IC Role / Device Role / Timing Role: Primary reference for dual-slope or sigma-delta ADC measuring mains voltage and current. Use Value: 120ppm long-term stability and AEC-Q100 qualification support 10-year calibration interval compliance per IEC 62053. |
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) vs. fixed 3.3V; 2% initial accuracy; 100ppm/°C tempco; SOT23-3 package | Requires external resistors for 3.3V setting; higher drift limits use in automotive or metrology | Select when design flexibility or cost sensitivity outweighs precision and tempco requirements |
| MAX6008AEUR+T | Fixed 3.3V; ±0.2% initial accuracy; 20ppm/°C tempco; SOT23-3; 35µVRMS noise | Higher accuracy and lower noise, but not AEC-Q100 qualified and limited to −40°C to +85°C | Select for industrial or medical applications where extended temperature range is not required |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, LM4050CEX3-3.3/V+T uniquely combines AEC-Q100 qualification, ±0.5% accuracy, 50ppm/°C tempco, and SC70 size - making it the only option qualified for automotive under-hood use with minimal PCB footprint.
Availability
LM4050CEX3-3.3/V+T is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial PLC analog inputs, and smart meter reference subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050CEX3-3.3/V+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, serving industrial, automotive, communications, and healthcare markets since 1965.
The LM4050/LM4051 family was designed specifically for precision, low-power, space-constrained shunt reference applications - emphasizing AEC-Q100 qualification, micropower operation, and capacitor-free stability in harsh environments.
FAQ
What is the operating temperature range guaranteed for LM4050CEX3-3.3/V+T?
The LM4050CEX3-3.3/V+T is fully specified and guaranteed over −40°C to +125°C. This range is validated per AEC-Q100 stress testing and includes all electrical parameters - including reverse breakdown voltage, tempco, and dynamic impedance - with no derating required within this span.
Does LM4050CEX3-3.3/V+T require an external output capacitor for stability?
No, LM4050CEX3-3.3/V+T does not require an external output capacitor. It is internally compensated and remains stable with any capacitive load from 0 to 1µF, eliminating the need for external COUT and reducing BOM count and PCB area in compact designs.
What is the meaning of the "/V" suffix in LM4050CEX3-3.3/V+T?
The "/V" suffix in LM4050CEX3-3.3/V+T indicates AEC-Q100 qualification for automotive applications. This includes stress testing for temperature cycling, humidity, mechanical shock, and long-term reliability - ensuring LM4050CEX3-3.3/V+T meets automotive-grade quality and lifetime requirements.
How does the SC70 package of LM4050CEX3-3.3/V+T compare in size to the SOT23 version?
The SC70 package used in LM4050CEX3-3.3/V+T measures 1.8mm × 1.8mm, which is 50% smaller than the standard SOT23-3 package. This reduction directly saves >0.5mm² PCB area - critical for wearables, hearing aids, and multi-channel sensor modules where board space is constrained.
What is the minimum shunt current required for LM4050CEX3-3.3/V+T to maintain regulation?
The LM4050CEX3-3.3/V+T requires a minimum shunt current of 60µA to maintain regulation across its full temperature range. Below this threshold, reverse breakdown voltage deviates beyond specification; design must ensure ISHUNT ≥ 60µA even at worst-case VS(MIN) and ILOAD(MAX).
LM4050CEX3-3.3/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 50µVrms
- 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:
- SC-70-3
LM4050CEX3-3.3/V+T FAQ
1.How can I place an order for LM4050CEX3-3.3/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CEX3-3.3/V+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 LM4050CEX3-3.3/V+T reliable?
The price and inventory of LM4050CEX3-3.3/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CEX3-3.3/V+T is usually 5 days.
3.What payment methods are accepted for LM4050CEX3-3.3/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CEX3-3.3/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CEX3-3.3/V+T?
LM4050CEX3-3.3/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CEX3-3.3/V+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 LM4050CEX3-3.3/V+T?
For technical support, including LM4050CEX3-3.3/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CEX3-3.3/V+T requirements.
6.How does Aetrix verify that LM4050CEX3-3.3/V+T is sourced from the original manufacturer or authorized distributors?
All LM4050CEX3-3.3/V+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 LM4050CEX3-3.3/V+T meets industry standards.
7.What is the process for return or replacement of LM4050CEX3-3.3/V+T?
All LM4050CEX3-3.3/V+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CEX3-3.3/V+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 LM4050CEX3-3.3/V+T part is unused and in its original packaging.
Return procedure for LM4050CEX3-3.3/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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