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Analog Devices Inc./Maxim Integrated LM4050BIM3-2.5+T
- Part No.:
- LM4050BIM3-2.5+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3-2.5+T.pdf
- Description:
- LM4050 50PPM PER DEGREE CELSIUS
- Quantity:
- Payment:
- Shipping:
Inventory:44,900
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Product details
Overview
LM4050BIM3-2.5+T from Maxim Integrated is a precision 2.500V shunt voltage reference in SC70-3 package, featuring ±5.0mV initial accuracy (0.2%), 50ppm/°C max temperature coefficient, 60µA to 15mA operating current range, and guaranteed operation from –40°C to +125°C. It delivers stable reverse breakdown voltage for ADC/DAC biasing, portable power monitoring, and industrial sensor excitation circuits.
For engineers reviewing the LM4050BIM3-2.5+T datasheet, LM4050BIM3-2.5+T pinout, LM4050BIM3-2.5+T application, or LM4050BIM3-2.5+T equivalent, key selection criteria include shunt-current capability, output noise (35µVRMS), dynamic impedance (≤0.8Ω), no-output-capacitor requirement, and SC70 footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4050BIM3-2.5+T uses a laser-trimmed bandgap core to maintain a fixed 2.500V reverse breakdown voltage across its terminals when biased with 60µA–15mA shunt current. Its internal pass transistor sinks variable current to regulate voltage without external capacitors.
It operates as a two-terminal shunt device with pin 3 unconnected or tied to pin 2, exhibiting low dynamic impedance (0.3–0.8Ω) and wideband noise of 35µVRMS (10Hz–10kHz). Temperature performance is specified over –40°C to +125°C with ±15ppm/°C typical TC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±5.0mV at +25°C - ensures precise 12-bit DAC/ADC reference alignment |
| Initial Accuracy | ±0.2% (Grade B) - enables single-point calibration in battery-powered instrumentation |
| Temp Coefficient | 50ppm/°C max - limits drift to ±1.25mV over full –40°C to +125°C range |
| Operating Current | 60µA to 15mA - supports micropower sleep modes and high-load transient regulation |
| Dynamic Impedance | ≤0.8Ω at 1mA - maintains <1mV load-induced error under 1mA step changes |
| Output Noise | 35µVRMS (10Hz–10kHz) - suitable for 16-bit SAR ADC reference without filtering |
| Long-Term Stability | 120ppm after 1000h - predicts <0.012% output shift over 5-year field deployment |
Pinout & Package
LM4050BIM3-2.5+T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is NC and must be left floating or connected to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Terminal | Connects to system ground or low-impedance return path; defines reference cathode polarity |
| 2 (–) | Cathode / Negative Terminal | Output node where regulated 2.500V appears; sinks shunt current into this terminal |
| 3 (N.C.) | No Connection | Must remain unconnected or shorted to pin 2; no internal function or signal path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint - saves >50% board area vs. SOT23 in wearables and IoT sensors |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout risk in high-EMI environments |
| Low 35µVRMS noise | Enables direct use with 16-bit precision converters without external filtering |
| Wide 60µA–15mA shunt range | Supports both ultra-low-power sleep states (<100µA) and fast transient response (>10mA) |
| Guaranteed –40°C to +125°C operation | Validated for automotive under-hood and industrial process control applications |
Applications
| Portable Medical Sensors | Battery Management Systems |
|---|---|
Use Scenario: Reference for analog front-end of wearable ECG/PPG sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.500V bias to op-amps and ADCs during intermittent sampling. Use Value: 60µA minimum operating current extends battery life beyond 3 years; SC70 size fits sub-10mm² sensor modules. | Use Scenario: Cell voltage monitoring in 3S Li-ion packs for power tools and e-bikes. IC Role / Device Role / Timing Role: Precision reference for 12-bit delta-sigma ADC measuring individual cell voltages. Use Value: ±5.0mV initial accuracy ensures <0.2% cell-voltage measurement error; 50ppm/°C TC maintains accuracy across vehicle cabin temperatures. |
| Industrial Process Transmitters | Programmable Logic Controllers |
Use Scenario: 4–20mA loop-powered pressure/temperature transmitter with HART modulation. IC Role / Device Role / Timing Role: Stable 2.500V reference for DAC generating analog output and internal ADC reading sensor elements. Use Value: Guaranteed operation to +125°C allows placement near hot process piping; no capacitor needed simplifies loop-isolation design. | Use Scenario: Analog I/O module in DIN-rail mounted PLC handling thermocouple and RTD inputs. IC Role / Device Role / Timing Role: Primary reference for multi-channel simultaneous-sampling ADCs digitizing sensor signals. Use Value: 35µVRMS noise prevents degradation of effective resolution below 16 bits; long-term stability reduces field calibration frequency. |
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 (2.5V min), 1% initial accuracy, 100ppm/°C TC, SOT23-3 | Requires external resistor divider; less accurate and higher drift than LM4050BIM3-2.5+T | Select when adjustable output or cost sensitivity outweighs precision requirements |
| REF3025AIDBZR | 2.500V fixed, 0.2% initial accuracy, 50ppm/°C TC, but series topology (3-pin, higher dropout) | Requires minimum input voltage ≥2.7V; not a drop-in replacement due to different topology and pinout | Choose for low-noise series references where supply headroom permits |
Compared with TLVH431ACDBVR and REF3025AIDBZR, LM4050BIM3-2.5+T offers superior thermal stability in shunt configuration, eliminates external resistors, and supports lower supply voltages - critical for battery-fed systems where headroom and layout simplicity are constrained.
Availability
LM4050BIM3-2.5+T is available at Aetrix Electronics and suitable for portable medical sensors, battery management systems, and industrial process transmitters requiring stable component supply with RoHS-compliant packaging and extended temperature support.
Supply support for LM4050BIM3-2.5+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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The LM4050 series targets space-constrained, high-accuracy shunt reference needs in battery-powered and harsh-environment systems - emphasizing micropower operation, SC70 miniaturization, and guaranteed wide-temperature performance.
FAQ
What is the maximum shunt current rating for LM4050BIM3-2.5+T?
The absolute maximum reverse current for LM4050BIM3-2.5+T is 20mA. However, the recommended operating range is 60µA to 15mA per datasheet specifications. Exceeding 15mA risks exceeding power dissipation limits in the SC70 package, especially at elevated ambient temperatures. The device remains functional up to 20mA but may exceed junction temperature limits if sustained.
Does LM4050BIM3-2.5+T require an external output capacitor?
No, LM4050BIM3-2.5+T does not require an external output capacitor for stability. It is designed to remain stable with any capacitive load, including 0µF. This eliminates BOM cost and layout complexity, making it ideal for high-reliability or space-constrained applications where capacitor aging or failure must be avoided.
What is the pin 3 function on LM4050BIM3-2.5+T?
Pin 3 on LM4050BIM3-2.5+T is labeled N.C. (No Connection) and must be left floating or connected to pin 2 (cathode). It has no internal connection and serves only as a mechanical pad for package symmetry. Connecting it to pin 2 is acceptable and sometimes used for improved thermal conduction or grounding consistency in layout.
How does the temperature coefficient of LM4050BIM3-2.5+T affect accuracy over –40°C to +125°C?
With a maximum temperature coefficient of 50ppm/°C, LM4050BIM3-2.5+T contributes up to ±6.25mV (±0.25%) additional error over the full –40°C to +125°C range relative to its +25°C value. Combined with ±5.0mV initial tolerance, total worst-case error is ±11.25mV (±0.45%) - verified across temperature in production testing per datasheet Grade B specifications.
Is LM4050BIM3-2.5+T RoHS compliant and lead-free?
Yes, LM4050BIM3-2.5+T is RoHS compliant and lead-free, as indicated by the "+" suffix in the part number. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering per industry standards. The SC70 package uses matte tin finish on leads and complies with EU RoHS Directive 2011/65/EU.
LM4050BIM3-2.5+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- 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:
- 41µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BIM3-2.5+T FAQ
1.How can I place an order for LM4050BIM3-2.5+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3-2.5+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 LM4050BIM3-2.5+T reliable?
The price and inventory of LM4050BIM3-2.5+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIM3-2.5+T is usually 5 days.
3.What payment methods are accepted for LM4050BIM3-2.5+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3-2.5+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3-2.5+T?
LM4050BIM3-2.5+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3-2.5+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 LM4050BIM3-2.5+T?
For technical support, including LM4050BIM3-2.5+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3-2.5+T requirements.
6.How does Aetrix verify that LM4050BIM3-2.5+T is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3-2.5+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 LM4050BIM3-2.5+T meets industry standards.
7.What is the process for return or replacement of LM4050BIM3-2.5+T?
All LM4050BIM3-2.5+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3-2.5+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 LM4050BIM3-2.5+T part is unused and in its original packaging.
Return procedure for LM4050BIM3-2.5+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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