My Inquiry
My Account
Analog Devices Inc./Maxim Integrated LM4050CEX3-3.3+T
- Part No.:
- LM4050CEX3-3.3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050CEX3-3.3+T.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,340
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4050CEX3-3.3+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 space-constrained portable systems.
For engineers reviewing the LM4050CEX3-3.3+T datasheet, LM4050CEX3-3.3+T pinout, LM4050CEX3-3.3+T application, or LM4050CEX3-3.3+T equivalent, key selection criteria include guaranteed AEC-Q100 qualification for automotive use, no external capacitor requirement, and validated performance across full industrial temperature range with micropower operation.
Technical Context
The LM4050CEX3-3.3+T implements a laser-trimmed bandgap core with two-terminal shunt topology, operating as a precision voltage clamp at 3.3000V nominal reverse breakdown. Its internal architecture eliminates need for output capacitance while maintaining stability under capacitive loads up to 1µF.
Guaranteed over -40°C to +125°C, it achieves ±0.5% total voltage tolerance (including tempco drift) and exhibits ≤8.0mV reverse voltage shift across 1mA–15mA shunt current range. Dynamic impedance remains ≤0.9Ω at 1mA, supporting low-noise regulation in battery-powered instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3000V nominal at +25°C, with ±15mV (±0.5%) initial tolerance - enables direct replacement of 3.3V LDO references in precision analog signal chains. |
| Temperature Coefficient | ≤50ppm/°C max over -40°C to +125°C - ensures <±0.5% total drift across full industrial range, critical for automotive sensor calibration. |
| Shunt Current Range | 60µA to 15mA - supports ultra-low-power IoT sensors (e.g., 60µA sleep mode) and higher-current data acquisition systems (e.g., 12-bit SAR ADC biasing). |
| Dynamic Impedance | ≤0.9Ω at 1mA, 120Hz - minimizes load-induced voltage droop during fast digital switching events in mixed-signal PCBs. |
| Wideband Noise | 50µVRMS (10Hz–10kHz) - meets SNR requirements for 16-bit ADC reference inputs without additional filtering. |
| Long-Term Stability | 120ppm after 1000 hours - ensures calibration integrity in medical and test equipment with multi-year service life. |
| Package | 3-pin SC70 (1.8mm × 1.8mm) - reduces board area by 50% vs. SOT23, enabling compact wearable and automotive ECU designs. |
Pinout & Package
LM4050CEX3-3.3+T uses a 3-pin SC70 surface-mount package (outline 21-0075, land pattern 90-0208) with 1.8mm × 1.8mm footprint and 0.65mm pitch. Pin 3 is unconnected or tied to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Positive terminal (anode) | Connects to system ground or low-impedance return path; forms cathode-to-anode reference voltage node. |
| 2 (-) | Negative terminal (cathode) | Reference output node; voltage measured between pin 2 and pin 1 defines 3.3V shunt regulation point. |
| 3 (N.C.) | No connection | Must be left floating or shorted to pin 2; not electrically active - prevents assembly errors in automated placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Validated for automotive applications including engine control units and ADAS sensors requiring -40°C to +125°C reliability. |
| No output capacitor required | Stable with any capacitive load (0–1µF), eliminating BOM cost and layout area for decoupling caps in space-critical designs. |
| Micropower operation | 60µA minimum shunt current enables >10-year battery life in wireless sensor nodes using coin-cell power sources. |
| Laser-trimmed accuracy | ±0.5% initial tolerance achieved via on-die resistor trimming - avoids post-assembly calibration in production test flows. |
| Low thermal resistance | θJA = 340.4°C/W on 4-layer board - supports 75mW dissipation at +125°C ambient when used with proper copper pour. |
Applications
| Portable Medical Sensors | Automotive Cabin Controllers |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring stable 3.3V reference for 14-bit ADC conversion. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation voltage for analog front-end and reference for successive-approximation ADC. Use Value: 50µVRMS noise and 50ppm/°C tempco ensure <0.01% measurement error across body temperature range (35–42°C). |
Use Scenario: HVAC control modules in passenger vehicles needing precise 3.3V rail for microcontroller I/O and sensor interface. IC Role / Device Role / Timing Role: Primary voltage reference for MCU ADC, CAN transceiver biasing, and thermistor-based temperature sensing. Use Value: AEC-Q100 qualification and -40°C to +125°C operation guarantee functional safety compliance without derating. |
| Industrial Data Loggers | Smart Energy Meters |
|
Use Scenario: Ruggedized field instruments recording vibration, pressure, and humidity with 16-bit resolution over 10-year deployment. IC Role / Device Role / Timing Role: Precision reference for sigma-delta ADCs and isolated analog input channels. Use Value: 120ppm long-term stability eliminates annual recalibration, reducing maintenance cost in remote installations. |
Use Scenario: Revenue-grade electricity meters requiring metrology-grade voltage reference for energy calculation accuracy. IC Role / Device Role / Timing Role: Reference source for polyphase energy measurement ICs (e.g., ADE7953) and anti-tampering circuitry. Use Value: ±0.5% initial accuracy and <±0.5% total tolerance over temperature meet IEC 62053-22 Class 0.2 accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C33IDBZR | Same 3.3V output and SC70 package, but ±0.5% initial accuracy with 100ppm/°C max tempco - looser thermal stability. | Acceptable for consumer electronics where <±1% total error is sufficient; not AEC-Q100 qualified. | Select TL4050C33IDBZR only for cost-sensitive non-automotive designs with relaxed temperature drift requirements. |
| REF3033AIDBZR | 3.3V series reference in same SC70 package, 0.2% initial accuracy, 50ppm/°C tempco, but requires 50µA supply current and minimum 1mA load. | Suitable for systems with dedicated low-noise LDO supply; incompatible with shunt-based topologies like high-side current sensing. | Choose REF3033AIDBZR when board has clean 3.3V rail and design requires series-reference topology with lower output impedance. |
Compared with TL4050C33IDBZR and REF3033AIDBZR, LM4050CEX3-3.3+T uniquely combines AEC-Q100 qualification, true shunt operation down to 60µA, and guaranteed 50ppm/°C stability - making it the only option for automotive-grade, ultra-low-power, two-terminal reference applications.
Availability
LM4050CEX3-3.3+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive cabin controllers, industrial data loggers, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050CEX3-3.3+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 delivers precision shunt references optimized for space-constrained, battery-powered, and automotive applications demanding high accuracy, low power, and robust thermal performance.
FAQ
What is the maximum shunt current rating for LM4050CEX3-3.3+T?
The LM4050CEX3-3.3+T supports a maximum continuous shunt current of 15mA under normal operation, with absolute maximum rating of 20mA. Exceeding 15mA risks exceeding power dissipation limits in the SC70 package, especially above +70°C ambient. For reliable operation, maintain ISHUNT ≤ 15mA using appropriate series resistance (RS) calculated per the datasheet equation.
Does LM4050CEX3-3.3+T require an external output capacitor?
No, LM4050CEX3-3.3+T does not require an external output capacitor for stability. It is designed to remain stable with any capacitive load from 0 to 1µF, eliminating the need for decoupling capacitors in space-constrained layouts. This feature simplifies design and reduces BOM count compared to many competing references.
Is LM4050CEX3-3.3+T qualified for automotive applications?
Yes, LM4050CEX3-3.3+T is AEC-Q100 qualified for automotive applications. It is specified over -40°C to +125°C, features laser-trimmed accuracy, and meets stringent reliability requirements for use in engine control units, ADAS sensors, and cabin electronics where long-term stability and thermal robustness are critical.
What is the typical wideband noise performance of LM4050CEX3-3.3+T?
The LM4050CEX3-3.3+T delivers 50µVRMS wideband noise over 10Hz to 10kHz at 100µA shunt current. This low-noise performance supports high-resolution analog-to-digital conversion in 16-bit data acquisition systems without requiring additional filtering stages, preserving signal integrity in precision measurement applications.
How is pin 3 configured on LM4050CEX3-3.3+T?
Pin 3 of LM4050CEX3-3.3+T is designated N.C. (no connection) and must be left unconnected or tied directly to pin 2 (cathode). This configuration is mandatory per the datasheet to prevent malfunction or parametric deviation. Incorrect connection of pin 3 may compromise voltage accuracy or thermal performance.
LM4050CEX3-3.3+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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050CEX3-3.3+T FAQ
1.How can I place an order for LM4050CEX3-3.3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CEX3-3.3+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+T reliable?
The price and inventory of LM4050CEX3-3.3+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+T is usually 5 days.
3.What payment methods are accepted for LM4050CEX3-3.3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CEX3-3.3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CEX3-3.3+T?
LM4050CEX3-3.3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CEX3-3.3+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+T?
For technical support, including LM4050CEX3-3.3+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+T requirements.
6.How does Aetrix verify that LM4050CEX3-3.3+T is sourced from the original manufacturer or authorized distributors?
All LM4050CEX3-3.3+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+T meets industry standards.
7.What is the process for return or replacement of LM4050CEX3-3.3+T?
All LM4050CEX3-3.3+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CEX3-3.3+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+T part is unused and in its original packaging.
Return procedure for LM4050CEX3-3.3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CEX3-3.3+T Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
