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Analog Devices Inc./Maxim Integrated LM4050BEM3-2.5/V+
- Part No.:
- LM4050BEM3-2.5/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3-2.5/V+.pdf
- Description:
- 50PPM/C PRECISION MICROPOWER SHU
- Quantity:
- Payment:
- Shipping:
Inventory:1,642
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Product details
Overview
LM4050BEM3-2.5/V+ from Analog Devices is a precision 2.500 V, 0.2% initial accuracy, 50 ppm/°C max temperature coefficient shunt voltage reference in SC70-3 package. It operates over -40°C to +125°C with 60 µA to 15 mA shunt current range and 35 µVRMS wideband noise (10 Hz–10 kHz), enabling stable reference generation in space-constrained battery-powered systems.
For engineers reviewing the LM4050BEM3-2.5/V+ datasheet, LM4050BEM3-2.5/V+ pinout, LM4050BEM3-2.5/V+ application, or LM4050BEM3-2.5/V+ equivalent, key selection criteria include guaranteed AEC-Q100 qualification (/V+ suffix), no-output-capacitor stability, ultra-small 1.8 mm × 1.8 mm SC70 footprint, and micropower operation down to 60 µA.
Technical Context
The LM4050BEM3-2.5/V+ implements a laser-trimmed bandgap shunt reference architecture, delivering fixed 2.500 V reverse breakdown voltage with ±5.0 mV (±0.2%) tolerance at +25°C and ±18 mV total tolerance over -40°C to +125°C. Its dynamic impedance is 0.3–0.8 Ω at 1 mA, ensuring minimal voltage shift under load transients.
It requires no external stabilization capacitor and remains stable with any capacitive load. The device clamps to ~0.7 V below ground under forward bias up to 10 mA, and its junction temperature is limited to +150°C with thermal resistance θJA = 340.4°C/W on a four-layer board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal at +25°C; ±5.0 mV (±0.2%) initial tolerance ensures high-accuracy ADC/DAC biasing without calibration. |
| Tempco | ≤50 ppm/°C max over -40°C to +125°C; guarantees ≤±1.25 mV total drift across full industrial automotive range. |
| Shunt Current Range | 60 µA to 15 mA; supports micropower sensor nodes and higher-current analog front-ends without external regulation. |
| Wideband Noise | 35 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 variation during load current steps in precision feedback loops. |
| Long-Term Stability | 120 ppm after 1000 hours; ensures reference integrity in mission-critical automotive and industrial control systems. |
Pinout & Package
LM4050BEM3-2.5/V+ uses the 3-pin SC70 surface-mount package (1.8 mm × 1.8 mm), 50% smaller than SOT23. 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 2.5 V. |
| 2 (–) | Negative terminal (cathode) | Reference ground return; forms shunt path with external series resistor (RS). |
| 3 (N.C.) | No connection | Must be left floating or shorted to Pin 2; no internal bond wire-no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Validated for automotive applications per /V+ suffix; supports under-hood and ADAS reference designs. |
| No output capacitor required | Internally compensated for unconditional stability with any capacitive load-reduces BOM count and PCB area. |
| Ultra-small SC70-3 package | 1.8 mm × 1.8 mm footprint enables placement in tight spaces like wearable sensors and compact modules. |
| Low 35 µVRMS noise | Enables high-resolution data acquisition without external low-noise filtering stages. |
| 60 µA minimum operating current | Supports ultra-low-power wake-up circuits and energy-harvesting systems with microamp-level supply budgets. |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Temperature and pressure sensing in HVAC control units with CAN bus reporting. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for 12-bit ADC measuring thermistor and piezoresistive sensor bridges. Use Value: AEC-Q100 qualification and ±50 ppm/°C tempco ensure <±2 LSB error over -40°C to +85°C ambient. |
Use Scenario: Battery-powered ECG and pulse oximeter devices requiring FDA-compliant signal chain accuracy. IC Role / Device Role / Timing Role: Supplies precision reference for low-noise instrumentation amplifier and SAR ADC subsystem. Use Value: 35 µVRMS noise and 0.2% initial accuracy enable <1% total measurement uncertainty without recalibration. |
| Industrial IoT Edge Nodes | Smart Energy Meters |
Use Scenario: Wireless vibration and current monitoring nodes deployed in factory environments with wide temperature swings. IC Role / Device Role / Timing Role: References isolated sigma-delta ADC measuring motor phase currents and accelerometer outputs. Use Value: 60 µA–15 mA operating range allows direct use with LDOs or charge-pump supplies; SC70 size fits dense RF module layouts. |
Use Scenario: Revenue-grade electricity meters requiring metrology-grade voltage reference per IEC 62053-21 Class 0.5S. IC Role / Device Role / Timing Role: Sets precise 2.5 V reference for polyphase energy measurement ICs (e.g., ADE7953) with anti-tamper detection. Use Value: 120 ppm long-term stability and ±0.2% initial tolerance meet 10-year calibration retention 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 |
|---|---|---|---|
| TLVH431AIDBVR | 2.5 V adjustable shunt reference; 1% initial accuracy; 100 ppm/°C tempco; SOT23-3 package. | Lower accuracy and higher tempco limit use to non-critical biasing; not AEC-Q100 qualified. | Select when cost sensitivity outweighs precision and automotive compliance requirements. |
| ADR3425ARJZ-R7 | 2.5 V series reference; 0.1% initial accuracy; 10 ppm/°C tempco; SOT23-5 package; requires 100 µA min supply current. | Higher accuracy and lower noise but needs dedicated supply rail; larger footprint and higher quiescent power. | Select when ultra-low tempco and series topology compatibility (e.g., with op-amp buffers) are prioritized over shunt simplicity. |
Compared with TLVH431AIDBVR and ADR3425ARJZ-R7, the LM4050BEM3-2.5/V+ uniquely balances AEC-Q100 qualification, SC70 size, 0.2% accuracy, and capacitor-free operation-making it optimal for space- and reliability-constrained automotive and portable industrial designs where shunt topology is preferred.
Availability
LM4050BEM3-2.5/V+ is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial IoT edge nodes, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050BEM3-2.5/V+ 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-including automotive AEC-Q100 systems and battery-operated portable instrumentation-where stability, small size, and no-output-capacitor operation are critical.
FAQ
What does the "/V+" suffix mean in LM4050BEM3-2.5/V+?
The "/V+" suffix indicates AEC-Q100 qualification per Grade 1 (-40°C to +125°C) standards, including stress testing for automotive reliability. LM4050BEM3-2.5/V+ is fully tested and documented for use in automotive cabin, chassis, and ADAS subsystems-not just industrial grade. This certification is explicitly stated in the Analog Devices ordering information and features section.
Can LM4050BEM3-2.5/V+ operate without an output capacitor?
Yes. LM4050BEM3-2.5/V+ is internally compensated and stable with any capacitive load-from 0 pF to >10 µF-eliminating the need for external output capacitors. This is confirmed in the "No Output Capacitors Required" feature and verified in the Typical Operating Characteristics (Figure 14–15) showing stable impedance vs. frequency with C1 = 0.
What is the minimum shunt current required for LM4050BEM3-2.5/V+ to regulate properly?
The minimum operating shunt current for LM4050BEM3-2.5/V+ is 60 µA across -40°C to +125°C, as specified in the Electrical Characteristics table for the 2.500 V version. Below this, reverse breakdown voltage degrades; design must ensure ISHUNT ≥ 60 µA under worst-case VS(min) and ILOAD(max) conditions.
How does LM4050BEM3-2.5/V+ compare to LM4050AEM3-2.5/V+ in accuracy?
LM4050BEM3-2.5/V+ has ±0.2% initial accuracy (±5.0 mV at +25°C), while LM4050AEM3-2.5/V+ offers ±0.1% (±2.5 mV). Both share identical 50 ppm/°C tempco, SC70-3 package, and AEC-Q100 qualification. Choose the 'B' grade when 0.2% meets system budget and cost optimization is needed.
Is LM4050BEM3-2.5/V+ compatible with SOT23-3 footprint?
No. LM4050BEM3-2.5/V+ uses the SC70-3 package (outline 21-0075), which is physically smaller (1.8 mm × 1.8 mm) than SOT23-3 (2.9 mm × 1.6 mm) and has different pad layout (land pattern 90-0208). It is not footprint-compatible with SOT23 variants like LM4050BEM3-2.5+T-separate PCB layout is required.
LM4050BEM3-2.5/V+ 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:
- ±0.2%
- 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:
- SOT-23-3
LM4050BEM3-2.5/V+ FAQ
1.How can I place an order for LM4050BEM3-2.5/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3-2.5/V+ 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 LM4050BEM3-2.5/V+ reliable?
The price and inventory of LM4050BEM3-2.5/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BEM3-2.5/V+ is usually 5 days.
3.What payment methods are accepted for LM4050BEM3-2.5/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3-2.5/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3-2.5/V+?
LM4050BEM3-2.5/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3-2.5/V+ 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 LM4050BEM3-2.5/V+?
For technical support, including LM4050BEM3-2.5/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3-2.5/V+ requirements.
6.How does Aetrix verify that LM4050BEM3-2.5/V+ is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3-2.5/V+ 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 LM4050BEM3-2.5/V+ meets industry standards.
7.What is the process for return or replacement of LM4050BEM3-2.5/V+?
All LM4050BEM3-2.5/V+ units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3-2.5/V+, 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 LM4050BEM3-2.5/V+ part is unused and in its original packaging.
Return procedure for LM4050BEM3-2.5/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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