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Analog Devices Inc./Maxim Integrated LM4050CEX3-2.5+T
- Part No.:
- LM4050CEX3-2.5+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050CEX3-2.5+T.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,256
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Product details
Overview
LM4050CEX3-2.5+T from Analog Devices is a precision 2.500 V, 0.5% initial accuracy, 50 ppm/°C max temperature coefficient shunt voltage reference in a 3-pin SC70 package. It operates over -40°C to +125°C with 60 µA to 15 mA shunt current capability and 35 µVRMS wideband noise (10 Hz–10 kHz), enabling stable reference generation in space-constrained battery-powered systems.
For engineers reviewing the LM4050CEX3-2.5+T datasheet, LM4050CEX3-2.5+T pinout, LM4050CEX3-2.5+T application, or LM4050CEX3-2.5+T equivalent, key selection criteria include guaranteed reverse breakdown voltage tolerance (±13 mV at +25°C), no-output-capacitor stability, capacitive load tolerance, and AEC-Q100 qualification for automotive use cases.
Technical Context
The LM4050CEX3-2.5+T implements a laser-trimmed bandgap shunt reference architecture, delivering fixed 2.500 V reverse breakdown voltage with ±13 mV (0.5%) initial tolerance at +25°C. Its dynamic impedance is ≤0.9 Ω at 1 mA, ensuring minimal output voltage shift across 60 µA–15 mA operating current range.
Guaranteed performance includes ±50 ppm/°C max temperature coefficient over –40°C to +125°C, 120 ppm long-term stability after 1000 hours, and stability with any capacitive load-no external capacitor required. The device clamps to ~0.7 V below ground under forward bias up to 10 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal reverse breakdown voltage; ±13 mV (0.5%) initial tolerance at +25°C ensures accurate ADC/DAC biasing without calibration. |
| Temperature Coefficient | ≤50 ppm/°C max over –40°C to +125°C; limits output drift to ±12.5 mV across full industrial temperature range. |
| Operating Current Range | 60 µA to 15 mA shunt current; supports ultra-low-power sensor nodes and high-current precision DACs with single-resistor biasing. |
| Dynamic Impedance | ≤0.9 Ω at 1 mA (120 Hz); maintains <1 mV output variation under 1 mA load transients, critical for high-resolution data converters. |
| Wideband Noise | 35 µVRMS (10 Hz–10 kHz); low-noise performance preserves SNR in 16-bit+ SAR ADC reference paths. |
| Long-Term Stability | 120 ppm after 1000 hours; ensures reference accuracy retention in mission-critical industrial control and automotive ECUs. |
| Package | 3-pin SC70 (1.8 mm × 1.8 mm); 50% smaller than SOT23, enabling compact PCB layouts in portable and wearable electronics. |
Pinout & Package
LM4050CEX3-2.5+T uses a 3-pin SC70 surface-mount package (outline number 21-0075) with 1.8 mm × 1.8 mm footprint and 0.5 mm pitch. Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Positive terminal (anode) | Reference output node; connects to load or feedback network; sinks current when reverse-biased. |
| Pin 2 (–) | Negative terminal (cathode) | Ground reference node; ties to system ground or return path; defines shunt voltage drop direction. |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; no internal function-omitting connection avoids parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70 package | 1.8 mm × 1.8 mm footprint enables placement in dense portable designs where SOT23 is too large. |
| No output capacitor required | Internally compensated for stability with any capacitive load-eliminates BOM cost and layout area for decoupling caps. |
| 0.5% initial accuracy (C grade) | ±13 mV tolerance at +25°C allows direct use in 12-bit systems without trimming or software calibration. |
| AEC-Q100 qualified | Qualified for automotive applications per /V versions; LM4050CEX3-2.5+T meets same reliability and thermal specs. |
| Low 35 µVRMS noise | Enables high-SNR precision measurement in battery-operated instrumentation and medical sensors. |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Reference for 16-bit analog front-end in wearable ECG patch with coin-cell power. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.500 V bias to ADC input stage and op-amp gain-setting resistors. Use Value: 60 µA minimum operating current extends battery life >3 months; SC70 size fits sub-100 mm² PCB area constraint. |
Use Scenario: Precision reference for LIN bus transceiver voltage monitor in door module ECU. IC Role / Device Role / Timing Role: Stable 2.500 V reference for comparator threshold setting and supply rail supervision. Use Value: AEC-Q100-aligned thermal performance (–40°C to +125°C) ensures reliable operation across engine bay temperature extremes. |
| Industrial Process Transmitters | Smart Energy Meters |
Use Scenario: 4–20 mA loop-powered transmitter requiring stable reference under varying loop voltage (9–36 V). IC Role / Device Role / Timing Role: Shunt reference regulating excitation voltage for RTD bridge and ADC reference. Use Value: 15 mA max shunt current and 50 ppm/°C tempco maintain <0.1% total error across ambient and self-heating conditions. |
Use Scenario: Reference for metrology-grade polyphase energy meter ASIC with anti-tampering detection. IC Role / Device Role / Timing Role: Primary 2.500 V reference for 24-bit sigma-delta ADC measuring voltage and current channels. Use Value: 120 ppm long-term stability ensures <0.01% calibration drift over 10-year field deployment without recalibration. |
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 (2.5 V min), 0.5% initial accuracy, 100 ppm/°C max tempco, SOT23-3 package. | Requires two external resistors for 2.5 V setting; higher tempco increases drift in wide-temperature industrial use. | Choose TLVH431ACDBVR only if adjustable output or lower cost outweighs need for guaranteed 2.500 V and tighter tempco. |
| MAX6008AEUR+T | Fixed 2.500 V, 0.2% initial accuracy, 50 ppm/°C max tempco, SOT23-3 package, 10 µA min current. | Higher accuracy but larger SOT23 footprint; not AEC-Q100 qualified; limited to 10 mA max shunt current. | Choose MAX6008AEUR+T when 0.2% accuracy is mandatory and SC70 size is not constrained; verify automotive compliance separately. |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, LM4050CEX3-2.5+T uniquely combines SC70 size, 0.5% accuracy, AEC-Q100 alignment, and 15 mA shunt capability-making it optimal for space-limited automotive and portable industrial designs where board area and thermal margin are critical.
Availability
LM4050CEX3-2.5+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050CEX3-2.5+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, serving industrial, automotive, communications, and healthcare markets since 1965.
LM4050CEX3-2.5+T belongs to the LM4050/LM4051 family of micropower shunt references, designed specifically for space-constrained, battery-operated, and automotive-grade systems demanding precision, stability, and small-footprint packaging.
FAQ
What is the guaranteed initial accuracy of LM4050CEX3-2.5+T at +25°C?
The LM4050CEX3-2.5+T is specified as a C-grade device with ±0.5% initial accuracy at +25°C, corresponding to ±13 mV tolerance around its nominal 2.500 V reverse breakdown voltage. This value is laser-trimmed and production-tested per Analog Devices' datasheet Electrical Characteristics table for the 2.500 V variant.
Does LM4050CEX3-2.5+T require an external output capacitor for stability?
No, LM4050CEX3-2.5+T does not require an external output capacitor. Its internal design ensures stability with any capacitive load-including no capacitor-and eliminates the need for decoupling components in the reference path, reducing BOM count and PCB area.
What is the operating temperature range for LM4050CEX3-2.5+T?
LM4050CEX3-2.5+T is fully specified and guaranteed over –40°C to +125°C. This extended industrial temperature range supports deployment in automotive under-hood modules, industrial PLCs, and outdoor instrumentation where ambient extremes are common.
Can LM4050CEX3-2.5+T be used in automotive applications?
Yes, LM4050CEX3-2.5+T is based on the AEC-Q100 qualified LM4050/LM4051 platform. While the specific /V suffix denotes formal automotive qualification, the LM4050CEX3-2.5+T shares identical electrical specs, thermal ratings, and reliability characteristics-making it suitable for automotive body electronics and infotainment systems.
What is the minimum shunt current required for LM4050CEX3-2.5+T to regulate properly?
The LM4050CEX3-2.5+T requires a minimum shunt current of 60 µA to maintain regulation within specification. Below this level, output voltage may deviate beyond the guaranteed tolerance band; design must ensure IR ≥ 60 µA across all operating conditions including worst-case temperature and supply voltage.
LM4050CEX3-2.5+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):
- 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:
- SC-70-3
LM4050CEX3-2.5+T FAQ
1.How can I place an order for LM4050CEX3-2.5+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CEX3-2.5+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 LM4050CEX3-2.5+T reliable?
The price and inventory of LM4050CEX3-2.5+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CEX3-2.5+T is usually 5 days.
3.What payment methods are accepted for LM4050CEX3-2.5+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CEX3-2.5+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CEX3-2.5+T?
LM4050CEX3-2.5+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CEX3-2.5+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 LM4050CEX3-2.5+T?
For technical support, including LM4050CEX3-2.5+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CEX3-2.5+T requirements.
6.How does Aetrix verify that LM4050CEX3-2.5+T is sourced from the original manufacturer or authorized distributors?
All LM4050CEX3-2.5+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 LM4050CEX3-2.5+T meets industry standards.
7.What is the process for return or replacement of LM4050CEX3-2.5+T?
All LM4050CEX3-2.5+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CEX3-2.5+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 LM4050CEX3-2.5+T part is unused and in its original packaging.
Return procedure for LM4050CEX3-2.5+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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