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Analog Devices Inc./Maxim Integrated LM4050BEX3-2.5/V+T
- Part No.:
- LM4050BEX3-2.5/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050BEX3-2.5/V+T.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,369
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Product details
Overview
LM4050BEX3-2.5/V+T from Analog Devices is a precision 2.500 V, 0.2% 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 28 µVRMS wideband noise (10 Hz–10 kHz), enabling stable reference generation in space-constrained, battery-powered systems.
For engineers reviewing the LM4050BEX3-2.5/V+T datasheet, LM4050BEX3-2.5/V+T pinout, LM4050BEX3-2.5/V+T application, or LM4050BEX3-2.5/V+T equivalent, this page delivers verified specifications, AEC-Q100 qualified automotive-grade performance, SC70 thermal and layout data, and real-world design context for high-reliability analog reference selection.
Technical Context
The LM4050BEX3-2.5/V+T implements a laser-trimmed bandgap core with two-terminal shunt topology, delivering fixed 2.500 V reverse breakdown voltage without requiring external stabilization capacitors. Its internal architecture maintains regulation across 60 µA–15 mA load current while tolerating any capacitive output load.
Guaranteed over -40°C to +125°C, it achieves ±5.0 mV (±0.2%) total tolerance at +25°C and ≤50 ppm/°C tempco across full temperature range. The /V suffix confirms AEC-Q100 qualification for automotive applications, with SC70 package thermal resistance θJA = 340.4°C/W on four-layer board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±5.0 mV at +25°C - precise reference for 12-bit ADCs, DACs, and sensor signal chains requiring <0.1% full-scale error. |
| Initial Accuracy | 0.2% (B grade) - enables single-point calibration in portable instrumentation without trimming resistors. |
| Tempco | ≤50 ppm/°C - ensures ≤±1.25 mV drift over -40°C to +125°C, critical for automotive under-hood sensors. |
| Shunt Current Range | 60 µA to 15 mA - supports ultra-low-power sleep modes and high-current precision DAC biasing in same design. |
| Wideband Noise | 28 µVRMS (10 Hz–10 kHz) - low enough for 16-bit SAR ADC reference without added filtering. |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA - minimizes output voltage shift during transient load changes in closed-loop power supplies. |
| AEC-Q100 Grade | Qualified - meets stress testing requirements for automotive electronics including temperature cycling and HTOL. |
Pinout & Package
LM4050BEX3-2.5/V+T uses the 3-pin SC70 package (1.8 mm × 1.8 mm), optimized for high-density PCB layouts. Pin 3 is NC and must be left unconnected or tied to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Positive terminal (anode) | Connects to regulated output node; sinks current when reverse-biased above 2.500 V. |
| 2 (–) | Negative terminal (cathode) | Reference ground connection; forms shunt path with external resistor to set operating current. |
| 3 (N.C.) | No connection | Must be left floating or shorted to Pin 2; no internal bond wire - avoids parasitic capacitance or leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed bandgap core | Enables 0.2% initial accuracy without external calibration, reducing BOM count and test time. |
| No output capacitor required | Eliminates stability risk and board area for decoupling caps - simplifies layout in wearables and medical patches. |
| Tolerates any capacitive load | Supports direct connection to ADC input capacitors or long traces without oscillation or overshoot. |
| Ultra-small SC70 footprint | 50% smaller than SOT23 - enables placement adjacent to precision ICs with minimal thermal coupling. |
| AEC-Q100 qualified | Validated for automotive use including engine control units, ADAS sensors, and infotainment power rails. |
Applications
| Portable Medical Sensors | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered pulse oximeter with 16-bit ADC measuring weak photodiode signals. IC Role / Device Role / Timing Role: Provides stable 2.500 V reference for ADC and transimpedance amplifier biasing. Use Value: 28 µVRMS noise and 0.2% accuracy ensure <1 LSB error across full temperature range without recalibration. | Use Scenario: Occupancy detection system using MEMS microphones and low-power MCU in vehicle cabin. IC Role / Device Role / Timing Role: Supplies precision reference to microphone bias circuit and ADC front-end. Use Value: AEC-Q100 qualification and -40°C to +125°C operation guarantee reliability in varying cabin temperatures. |
| Industrial Data Loggers | Smart Energy Meters |
Use Scenario: Remote environmental monitor logging temperature, humidity, and gas concentration over 10-year field life. IC Role / Device Role / Timing Role: Reference source for multi-channel 24-bit sigma-delta ADC measuring RTD and thermistor bridges. Use Value: 120 ppm long-term stability (1000 h) and 50 ppm/°C tempco minimize calibration drift between maintenance cycles. | Use Scenario: Revenue-grade electricity meter requiring metrology-grade accuracy per IEC 62053-21. IC Role / Device Role / Timing Role: Shunt reference for isolated ADC measuring mains voltage and current waveforms. Use Value: 60 µA minimum operating current enables ultra-low standby power (<10 µW) while maintaining reference integrity. |
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 1.24 V reference; requires two external resistors to set 2.5 V; 100 ppm/°C tempco; SOT23-3 package. | Not AEC-Q100 qualified; higher tempco limits automotive use; adjustable topology increases component count. | Select only if cost sensitivity outweighs accuracy, tempco, and qualification requirements. |
| ADR3425ARJZ-R7 | 2.5 V series reference; 0.1% initial accuracy; 10 ppm/°C tempco; SC70-5 package; requires input supply >2.75 V. | Higher accuracy and lower noise but consumes 100 µA quiescent current; not shunt-based - incompatible with high-side sensing topologies. | Choose for ultra-low-drift applications where supply headroom permits series topology and layout allows 5-pin footprint. |
Compared with TLVH431ACDBVR and ADR3425ARJZ-R7, LM4050BEX3-2.5/V+T uniquely combines AEC-Q100 qualification, fixed 2.5 V output, SC70-3 footprint, and shunt operation - making it optimal for space-constrained, automotive-grade, two-terminal reference designs where supply voltage may vary widely.
Availability
LM4050BEX3-2.5/V+T is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical devices, industrial data loggers, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050BEX3-2.5/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.
The LM4050/LM4051 family was designed specifically for precision, low-power, space-constrained shunt reference applications - emphasizing AEC-Q100 qualification, ultra-small SC70 packaging, and guaranteed performance across -40°C to +125°C.
FAQ
What is the exact output voltage tolerance of LM4050BEX3-2.5/V+T at +25°C?
The LM4050BEX3-2.5/V+T has a reverse breakdown voltage of 2.500 V with ±5.0 mV (±0.2%) tolerance at +25°C, as specified in the Electrical Characteristics table for the B grade. This tolerance remains valid across the full -40°C to +125°C operating range due to its guaranteed 50 ppm/°C temperature coefficient.
Does LM4050BEX3-2.5/V+T require an external capacitor for stability?
No, LM4050BEX3-2.5/V+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 - eliminating layout constraints and component count.
What does the "/V" suffix in LM4050BEX3-2.5/V+T signify?
The "/V" suffix in LM4050BEX3-2.5/V+T indicates AEC-Q100 qualification for automotive applications. This part has undergone rigorous stress testing including temperature cycling, high-temperature operating life (HTOL), and ESD verification per AEC-Q100 Rev H standards, confirming suitability for under-hood and cabin electronics.
Can LM4050BEX3-2.5/V+T operate at 60 µA shunt current across the full temperature range?
Yes, LM4050BEX3-2.5/V+T guarantees operation down to 60 µA shunt current across -40°C to +125°C. Its minimum operating current specification is explicitly tested and guaranteed over this full range, enabling reliable low-power sleep mode operation in battery-powered systems.
What is the thermal resistance (θJA) of LM4050BEX3-2.5/V+T in its SC70 package?
The junction-to-ambient thermal resistance (θJA) of LM4050BEX3-2.5/V+T in the 3-pin SC70 package is 340.4°C/W on a standard four-layer PCB, as measured per JEDEC JESD51-7. This value informs thermal design margining when dissipating up to 235.3 mW at +70°C ambient.
LM4050BEX3-2.5/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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050BEX3-2.5/V+T FAQ
1.How can I place an order for LM4050BEX3-2.5/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEX3-2.5/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 LM4050BEX3-2.5/V+T reliable?
The price and inventory of LM4050BEX3-2.5/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 LM4050BEX3-2.5/V+T is usually 5 days.
3.What payment methods are accepted for LM4050BEX3-2.5/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEX3-2.5/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEX3-2.5/V+T?
LM4050BEX3-2.5/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEX3-2.5/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 LM4050BEX3-2.5/V+T?
For technical support, including LM4050BEX3-2.5/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEX3-2.5/V+T requirements.
6.How does Aetrix verify that LM4050BEX3-2.5/V+T is sourced from the original manufacturer or authorized distributors?
All LM4050BEX3-2.5/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 LM4050BEX3-2.5/V+T meets industry standards.
7.What is the process for return or replacement of LM4050BEX3-2.5/V+T?
All LM4050BEX3-2.5/V+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEX3-2.5/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 LM4050BEX3-2.5/V+T part is unused and in its original packaging.
Return procedure for LM4050BEX3-2.5/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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