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Analog Devices Inc./Maxim Integrated LM4050BEM3-2.5+T
- Part No.:
- LM4050BEM3-2.5+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3-2.5+T.pdf
- Description:
- IC VREF SHUNT 2.5V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,386
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Product details
Overview
LM4050BEM3-2.5+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 SOT23 package. It operates over -40°C to +125°C with 60 µA to 15 mA shunt current capability, low 0.8 Ω dynamic impedance, and 35 µVRMS wideband noise (10 Hz–10 kHz). It serves as a stable reference in portable battery-powered instrumentation requiring micropower stability and space-constrained PCB layouts.
For engineers reviewing the LM4050BEM3-2.5+T datasheet, LM4050BEM3-2.5+T pinout, LM4050BEM3-2.5+T application, or LM4050BEM3-2.5+T equivalent, key selection criteria include guaranteed 0.2% initial tolerance at +25°C, ±5.0 mV total voltage tolerance over full temperature range, no external capacitor requirement, compatibility with capacitive loads, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LM4050BEM3-2.5+T implements a laser-trimmed bandgap shunt architecture that maintains a fixed 2.500 V reverse breakdown voltage across its terminals when biased with 60 µA–15 mA cathode-to-anode current. Its internal pass transistor sinks variable current through an external series resistor to regulate output voltage under varying load and supply conditions.
It guarantees ±50 ppm/°C max temperature coefficient over -40°C to +125°C, exhibits ≤8.0 mV reverse voltage change across its full operating current range, and delivers stable regulation without output capacitance-enabling direct interface with ADCs, DACs, and precision comparators in high-density analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal at +25°C; LM4050B grade ensures ±5.0 mV (±0.2%) initial tolerance and ±18 mV total tolerance over -40°C to +125°C. |
| Temperature Coefficient | ≤50 ppm/°C max over full operating range; enables <±0.25 mV drift from -40°C to +125°C for stable reference in industrial environments. |
| Shunt Current Range | 60 µA to 15 mA; supports ultra-low-power sensor biasing and high-current precision DAC reference simultaneously. |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA; ensures minimal output voltage perturbation during fast load transients in data acquisition systems. |
| Wideband Noise | 35 µVRMS (10 Hz–10 kHz); low enough for 16-bit ADC reference without additional filtering in portable medical devices. |
| Long-Term Stability | 120 ppm after 1000 hours; provides predictable aging behavior for calibration-critical test equipment. |
Pinout & Package
LM4050BEM3-2.5+T uses a 3-pin SOT23 surface-mount package (1.7 mm × 2.9 mm × 1.3 mm), optimized for high-density PCB layouts in portable electronics. Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2 per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Positive terminal (anode) | Connects to system ground or low-impedance return path; forms cathode-to-anode reference junction with Pin 2. |
| Pin 2 (–) | Negative terminal (cathode) | Reference output node; sinks shunt current to maintain 2.500 V across load; connects to ADC REF+ or DAC VREF input. |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; not electrically active and has no internal bond wire. |
Key Features
| Feature | Design Value |
|---|---|
| 0.2% initial accuracy | Reduces system-level calibration burden in factory-programmed sensors and handheld meters. |
| No output capacitor required | Eliminates BOM cost and board area for stability components; simplifies layout in space-constrained wearables. |
| Tolerates capacitive loads | Enables direct driving of ADC sample-and-hold inputs without isolation resistors or risk of oscillation. |
| AEC-Q100 qualified | Validated for automotive applications including engine control modules and ADAS power management subsystems. |
| Ultra-low 35 µVRMS noise | Supports 16-bit resolution without noise-induced code flicker in precision data loggers and portable oscilloscopes. |
Applications
| Portable Medical Sensors | Automotive Engine Control Units |
|---|---|
|
Use Scenario: Battery-powered glucose monitors and pulse oximeters requiring stable 2.5 V reference for analog front-end signal conditioning. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and ADC reference for low-noise biopotential amplifiers. Use Value: 0.2% initial accuracy and 50 ppm/°C tempco ensure consistent measurement accuracy across body-temperature variations and battery discharge cycles. |
Use Scenario: Reference for oxygen sensor signal conditioning and knock sensor ADC in engine control units operating from -40°C to +125°C. IC Role / Device Role / Timing Role: Precision shunt reference supplying stable 2.5 V to analog signal chains interfacing with exhaust gas sensors. Use Value: AEC-Q100 qualification and guaranteed performance over full automotive temperature range eliminate need for derating or margining. |
| Industrial Process Transmitters | Handheld Test Equipment |
|
Use Scenario: 4–20 mA loop-powered field transmitters measuring pressure, temperature, or flow in hazardous environments. IC Role / Device Role / Timing Role: Micropower shunt reference enabling precise current-loop DAC output scaling with minimal quiescent current draw. Use Value: 60 µA minimum operating current allows operation down to 3.3 V supply while maintaining 2.5 V reference integrity. |
Use Scenario: Bench multimeters and portable oscilloscopes requiring high-accuracy, low-drift reference for auto-ranging and calibration. IC Role / Device Role / Timing Role: Primary voltage reference for internal 24-bit sigma-delta ADC and self-calibration routines. Use Value: 120 ppm long-term stability reduces recalibration frequency and improves traceability in metrology-grade instruments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4050AEM3-2.5+T | 0.1% initial accuracy (±2.5 mV), same 50 ppm/°C tempco and SOT23 package | Required where tighter initial tolerance is needed for uncalibrated end products like consumer IoT sensors | Select when system-level calibration is impractical and higher accuracy justifies ~15% cost premium |
| TLV431ACDBVR | 2.5 V adjustable shunt reference, 1% initial accuracy, 100 ppm/°C tempco, 3-pin SOT23 | Suitable for non-critical biasing and feedback loops where cost sensitivity outweighs precision requirements | Choose for cost-driven designs accepting wider tolerance and higher tempco, especially in non-automotive industrial controls |
Compared with LM4050AEM3-2.5+T, the LM4050BEM3-2.5+T trades 0.1% accuracy for lower unit cost while retaining identical thermal and noise performance; versus TLV431ACDBVR, it delivers twice the initial accuracy and half the tempco at modest cost increase-making it optimal for calibrated portable instrumentation.
Availability
LM4050BEM3-2.5+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive engine control units, industrial process transmitters, and handheld test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050BEM3-2.5+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.
The LM4050/LM4051 family was designed specifically for space-constrained, micropower applications demanding precision voltage references with guaranteed stability across extreme temperatures and load conditions.
FAQ
What is the guaranteed initial accuracy of LM4050BEM3-2.5+T at +25°C?
The LM4050BEM3-2.5+T guarantees ±5.0 mV (±0.2%) initial accuracy at +25°C, corresponding to a 2.4950 V to 2.5050 V output voltage range. This specification is laser-trimmed and 100% production tested per Analog Devices' datasheet Electrical Characteristics table for the 2.500 V variant.
Does LM4050BEM3-2.5+T require an external output capacitor for stability?
No, the LM4050BEM3-2.5+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 sample-and-hold inputs or DAC reference pins without added series resistance or bypass components.
What is the minimum and maximum shunt current range for reliable operation of LM4050BEM3-2.5+T?
The LM4050BEM3-2.5+T operates reliably from 60 µA to 15 mA shunt current. Below 60 µA, regulation degrades; above 15 mA, performance remains stable but absolute maximum rating is 20 mA-exceeding which risks permanent damage. Designers must size the series resistor to maintain ISHUNT within this window across all operating conditions.
Is LM4050BEM3-2.5+T qualified for automotive applications?
Yes, the LM4050BEM3-2.5+T is AEC-Q100 qualified for automotive applications. Its specifications-including 0.2% initial accuracy, 50 ppm/°C temperature coefficient, and guaranteed operation from -40°C to +125°C-are validated per AEC-Q100 stress testing protocols for use in engine control, body electronics, and ADAS subsystems.
How does the LM4050BEM3-2.5+T compare to the LM4050CEM3-2.5+T in terms of accuracy and temperature coefficient?
The LM4050BEM3-2.5+T offers 0.2% initial accuracy and 50 ppm/°C max temperature coefficient, while the LM4050CEM3-2.5+T provides 0.5% initial accuracy with the same 50 ppm/°C tempco. Both share identical SOT23 packaging and operating current range, but the B-grade delivers tighter initial tolerance for applications needing reduced calibration overhead without upgrading to the A-grade.
LM4050BEM3-2.5+T 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+T FAQ
1.How can I place an order for LM4050BEM3-2.5+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3-2.5+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 LM4050BEM3-2.5+T reliable?
The price and inventory of LM4050BEM3-2.5+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BEM3-2.5+T is usually 5 days.
3.What payment methods are accepted for LM4050BEM3-2.5+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3-2.5+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3-2.5+T?
LM4050BEM3-2.5+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3-2.5+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 LM4050BEM3-2.5+T?
For technical support, including LM4050BEM3-2.5+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3-2.5+T requirements.
6.How does Aetrix verify that LM4050BEM3-2.5+T is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3-2.5+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 LM4050BEM3-2.5+T meets industry standards.
7.What is the process for return or replacement of LM4050BEM3-2.5+T?
All LM4050BEM3-2.5+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3-2.5+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 LM4050BEM3-2.5+T part is unused and in its original packaging.
Return procedure for LM4050BEM3-2.5+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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