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Texas Instruments LM4050BEM3-2.5
- Part No.:
- LM4050BEM3-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3-2.5.pdf
- Description:
- LM4050-N 50PPM/C PRECISION MICRO
- Quantity:
- Payment:
- Shipping:
Inventory:886
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Product details
Overview
LM4050BEM3-2.5 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.5 V reverse breakdown voltage with ±5 mV (±0.2%) initial tolerance at 25°C, 41 μVrms wideband noise (10 Hz–10 kHz), and 50 ppm/°C max temperature coefficient across −40°C to 85°C. It operates from 65 μA to 15 mA and requires no output capacitor, serving as a compact, low-drift reference in analog signal chains and ADC/DAC biasing.
For engineers reviewing the LM4050BEM3-2.5 datasheet, LM4050BEM3-2.5 pinout, LM4050BEM3-2.5 application, or LM4050BEM3-2.5 equivalent, key selection criteria include its B-grade accuracy, industrial temperature range, SOT-23 footprint compatibility, and shunt topology suitability for low-current, space-constrained systems where ground-referenced precision is required.
Technical Context
The LM4050BEM3-2.5 uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling stable 2.5 V reference performance over wide current (65 μA–15 mA) and temperature (−40°C to 85°C) ranges. Its dynamic impedance is 0.3 Ω at 1 mA, supporting low-noise operation without external stabilization.
It tolerates capacitive loads and eliminates need for output capacitor-unlike many shunt references-due to internal phase compensation. The device achieves ±5 mV initial tolerance via wafer-sort fuse trimming and maintains long-term stability of ≤120 ppm after 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; provides precise, ground-referenced bias point for ADCs, DACs, and sensor signal conditioning. |
| Initial Tolerance (25°C) | ±5 mV (±0.2%); B-grade accuracy enables high-resolution measurement without post-calibration in production. |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to 85°C; ensures <±0.13 mV drift across full industrial range, critical for stable sensor excitation. |
| Operating Current Range | 65 μA to 15 mA; supports ultra-low-power battery operation and robust load regulation up to 15 mA sink capability. |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz); low enough for 16-bit+ data acquisition without additional filtering. |
| Dynamic Impedance | 0.3 Ω at 1 mA; minimizes output voltage shift under varying load currents, improving regulation in dynamic systems. |
| Long-Term Stability | ≤120 ppm after 1000 hrs; ensures reference integrity over product lifetime without recalibration. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to regulated voltage rail; sinks all operating current plus load current; sets reference potential at this node. |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; serves as return path for cathode current and defines 0 V reference plane. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no electrical function-must not be tied to any net to avoid parasitic coupling or mechanical stress. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internal compensation ensures stability with any capacitive load, reducing BOM count and PCB area in portable designs. |
| Tolerates capacitive loads | Stable operation up to ≥10 μF output capacitance enables direct interface with ADC input filters and LDO bypass networks. |
| Fixed 2.5 V reverse breakdown | Optimized for systems requiring exact 2.5 V reference-e.g., 5 V supply rail half-divider alternatives or SAR ADC VREF inputs. |
| Low 41 μVrms noise | Enables high-SNR measurements in 16-bit data acquisition without external low-noise op-amp buffering. |
| 65 μA minimum operating current | Supports operation in ultra-low-power modes (e.g., sleep-state sensor biasing) while maintaining specified accuracy. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
|
Use Scenario: Handheld multimeter or environmental sensor node powered by coin cell or Li-ion battery. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V VREF to 16-bit sigma-delta ADC and analog front-end. Use Value: Enables >100 dB SNR and <±0.5 LSB INL over temperature without calibration, extending battery life via 65 μA quiescent operation. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA and ±10 V sensor signals. IC Role / Device Role / Timing Role: Precision reference for dual-slope or SAR ADCs, and excitation source for RTD/bridge sensors. Use Value: 50 ppm/°C tempco and ±5 mV tolerance ensure <±0.01% full-scale error across −40°C to 85°C ambient. |
| Energy Management | Precision Audio Components |
|
Use Scenario: Smart meter voltage monitoring channel measuring AC mains with isolation amplifier feedback. IC Role / Device Role / Timing Role: Reference for isolated delta-sigma modulator and anti-aliasing filter biasing. Use Value: Low 41 μVrms noise prevents quantization noise floor degradation; long-term stability avoids field recalibration. |
Use Scenario: High-fidelity DAC output stage requiring ultra-low-noise, DC-accurate bias for Class-A op-amps. IC Role / Device Role / Timing Role: Ground-referenced 2.5 V reference for DAC internal buffer and headphone amplifier offset nulling. Use Value: Eliminates need for discrete Zener + op-amp circuit, saving board space while achieving <1 μV p-p ripple in audio band. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | Adjustable 2.495 V reference (±1% initial tol), higher 2 mA min current, 0.22 Ω dynamic impedance, no guaranteed 50 ppm/°C spec. | Requires two external resistors for 2.5 V setting; less suitable for space-constrained or ultra-low-IQ designs. | Choose TL431CDBZR only if adjustable output or higher sink current (>15 mA) is needed; not drop-in for LM4050BEM3-2.5's fixed 2.5 V, low-IQ use case. |
| MAX6126AASA25+ | 2.5 V series reference, ±0.02% initial tol, 3 ppm/°C tempco, 1.2 mA quiescent, SO-8 package. | Series topology requires input >2.5 V; incompatible with shunt-based current-source topologies or low-headroom supplies. | Choose MAX6126AASA25+ only when ultra-high accuracy and low tempco outweigh board area and topology constraints; not a functional replacement. |
Compared with TL431CDBZR and MAX6126AASA25+, the LM4050BEM3-2.5 uniquely combines fixed 2.5 V output, SOT-23 footprint, 65 μA min current, and guaranteed 50 ppm/°C tempco-making it optimal for compact, battery-powered, ground-referenced precision systems where simplicity and low power are primary.
Availability
LM4050BEM3-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and energy management systems requiring stable component supply with consistent parametric performance and long-lifecycle availability.
Supply support for LM4050BEM3-2.5 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability components, with decades of expertise in precision reference design and automotive-grade qualification.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, low-power applications demanding high initial accuracy, low temperature drift, and robust capacitive-load stability-especially in portable, industrial, and automotive sensing systems.
FAQ
What is the minimum operating current for LM4050BEM3-2.5?
The LM4050BEM3-2.5 requires a minimum operating current of 65 μA across its full industrial temperature range (−40°C to 85°C). At 25°C, the typical minimum is 60 μA. This ultra-low current enables use in battery-powered devices where standby power must be minimized while maintaining specified voltage accuracy and stability.
Does LM4050BEM3-2.5 require an external output capacitor?
No, the LM4050BEM3-2.5 does not require an external output capacitor. Its internal compensation ensures stability with any capacitive load-including values up to 10 μF-eliminating the need for external stabilization components and simplifying layout in space-sensitive designs.
What is the temperature coefficient specification for LM4050BEM3-2.5?
The LM4050BEM3-2.5 has a maximum temperature coefficient of 50 ppm/°C over the industrial temperature range (−40°C to 85°C). This means its output voltage drift is bounded to ±0.13 mV across that range, ensuring predictable performance in uncontrolled thermal environments without active compensation.
How does the LM4050BEM3-2.5 differ from the A-grade version LM4050AIM3-2.5?
The LM4050BEM3-2.5 has ±5 mV (±0.2%) initial tolerance at 25°C, whereas the A-grade LM4050AIM3-2.5 offers tighter ±2.5 mV (±0.1%) tolerance. Both share identical temperature coefficient (50 ppm/°C max), noise (41 μVrms), and operating current range-so the B-grade provides cost-optimized performance where ±0.2% meets system accuracy requirements.
Is LM4050BEM3-2.5 qualified for automotive applications?
No, the LM4050BEM3-2.5 is rated for the industrial temperature range (−40°C to 85°C) and is not AEC-Q100 qualified. For automotive use, TI offers the LM4050-N-Q1 series (e.g., LM4050BEM3-2.5Q1), which is AEC-Q100 Grade 1 qualified and tested across −40°C to 125°C with enhanced reliability screening.
LM4050BEM3-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BEM3-2.5 FAQ
1.How can I place an order for LM4050BEM3-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3-2.5 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 reliable?
The price and inventory of LM4050BEM3-2.5 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 is usually 5 days.
3.What payment methods are accepted for LM4050BEM3-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3-2.5?
LM4050BEM3-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3-2.5 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?
For technical support, including LM4050BEM3-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3-2.5 requirements.
6.How does Aetrix verify that LM4050BEM3-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3-2.5 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 meets industry standards.
7.What is the process for return or replacement of LM4050BEM3-2.5?
All LM4050BEM3-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3-2.5, 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 part is unused and in its original packaging.
Return procedure for LM4050BEM3-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050BEM3-2.5 Tags
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