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Texas Instruments LM4050BEM3-2.5/NOPB
- Part No.:
- LM4050BEM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,755
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Product details
Overview
LM4050BEM3-2.5/NOPB 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, supporting portable instrumentation and battery-powered data acquisition.
For engineers reviewing the LM4050BEM3-2.5/NOPB datasheet, LM4050BEM3-2.5/NOPB pinout, LM4050BEM3-2.5/NOPB application, or LM4050BEM3-2.5/NOPB equivalent, key selection criteria include initial voltage accuracy, low-noise performance, capacitive-load stability, thermal hysteresis (0.7 mV), and compatibility with space-constrained PCB layouts using the 2.92 mm × 1.30 mm SOT-23 footprint.
Technical Context
The LM4050BEM3-2.5/NOPB uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 2.5 V reference under varying load and temperature. Its dynamic impedance is 0.3 Ω at 1 mA, and it tolerates unlimited capacitive loads without oscillation due to internal phase compensation.
It achieves ±0.2% initial accuracy (Grade B) via wafer-sort fuse trimming and maintains long-term stability of 120 ppm over 1000 hours. The device supports industrial temperature range (−40°C to 85°C) and exhibits 0.7 mV thermal hysteresis after cycling between −40°C and 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; ±5 mV (±0.2%) tolerance at 25°C ensures high-accuracy ADC/DAC biasing |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to 85°C; enables <±11 mV total drift in industrial environments |
| Operating Current | 65 μA min to 15 mA max; supports ultra-low-power sensor nodes and high-current reference buffering |
| Output Noise | 41 μVrms (10 Hz–10 kHz); critical for 16-bit+ data acquisition systems requiring clean reference rails |
| Dynamic Impedance | 0.3 Ω at 1 mA; minimizes load-induced voltage shift in precision current-sense and feedback circuits |
| Thermal Hysteresis | 0.7 mV over −40°C ↔ 125°C cycle; ensures repeatable calibration after thermal stress |
| Long-Term Stability | 120 ppm over 1000 hrs at 25°C; reduces recalibration frequency in test equipment and medical devices |
Pinout & Package
SOT-23 (DBZ) package, 3-pin, body size 2.92 mm × 1.30 mm, surface-mount, JEDEC MO-178 compatible. Pin 1 = Cathode (shunt current path), Pin 2 = Anode (ground reference), Pin 3 = NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input | Connects to regulated supply rail; sinks all excess current to maintain 2.5 V at Anode |
| Anode (Pin 2) | Reference ground node | Must be connected to system ground; defines 0 V reference for output voltage measurement |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no routing or soldering required - avoids layout errors |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Internal compensation eliminates need for stabilization cap - reduces BOM count and board area |
| Tolerates capacitive loads | Stable with any value of output capacitance - simplifies filtering in noisy environments |
| Fixed 2.5 V breakdown | Precisely trimmed voltage eliminates resistor-divider design effort for standard reference rails |
| Low 41 μVrms noise | Enables high-resolution analog measurements without post-regulation filtering |
| Wide 65 μA–15 mA operating range | Supports both micropower standby and active high-accuracy modes in same design |
Applications
| Portable, Battery-Powered Equipment | Data Acquisition Systems |
|---|---|
Use Scenario: Powering 12–16-bit SAR ADCs in handheld multimeters and IoT edge sensors. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V reference rail independent of battery voltage sag. Use Value: Maintains ±0.2% full-scale accuracy over battery discharge (2.7–4.2 V) and temperature (−20°C to 60°C). | Use Scenario: Precision voltage reference for multi-channel industrial DAQ modules. IC Role / Device Role / Timing Role: Low-noise, low-drift reference for simultaneous sampling ADC front-ends. Use Value: 41 μVrms noise and 50 ppm/°C TC enable ≤0.005% measurement error across 0–50°C ambient range. |
| Instrumentation | Process Control |
Use Scenario: Calibration reference in benchtop DMMs and signal generators. IC Role / Device Role / Timing Role: Primary voltage standard traceable to internal Zener trim, used for self-calibration routines. Use Value: 120 ppm long-term stability and 0.7 mV thermal hysteresis ensure <10 ppm/day drift during field operation. | Use Scenario: Reference for 4–20 mA transmitter loop-powered sensors. IC Role / Device Role / Timing Role: Shunt regulator establishing precise 2.5 V bias for op-amp and DAC circuitry. Use Value: 65 μA minimum current allows operation down to 3.3 V loop supply while maintaining regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050B25IDBZR | Same 2.5 V, ±0.2% grade, SOT-23 package; 40 μVrms noise, 45 ppm/°C TC, 60 μA min current | Lower noise and tighter TC, but requires verification of long-term stability (100 ppm/1000 h typical) | Preferred where sub-40 μV noise is critical and TI second-source assurance is needed |
| REF43FH250 | 2.5 V series reference; 30 μVrms noise, 3 ppm/°C TC, 1.2 mA quiescent, SOIC-8 package | Higher accuracy and lower drift, but larger footprint and higher supply current | Select when ultra-low TC and series architecture (high PSRR, no cathode current path) are mandatory |
Compared with TL4050B25IDBZR, LM4050BEM3-2.5/NOPB offers identical accuracy and noise but superior thermal hysteresis (0.7 mV vs. ~1.0 mV typical) and wider operating current range; versus REF43FH250, it trades off absolute drift performance for smaller size, zero quiescent current overhead, and simplified two-terminal integration.
Availability
LM4050BEM3-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and process control systems requiring stable component supply with guaranteed long-term continuity and traceable sourcing.
Supply support for LM4050BEM3-2.5/NOPB 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 power management ICs, with decades of leadership in precision reference technology.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-accuracy measurement applications - emphasizing low noise, zero-capacitor stability, and robust thermal performance.
FAQ
What is the minimum operating current for LM4050BEM3-2.5/NOPB?
The LM4050BEM3-2.5/NOPB requires a minimum operating current of 65 μA across its industrial temperature range (−40°C to 85°C). At 25°C, the typical minimum is 60 μA. This low current enables use in energy-harvesting and always-on sensor nodes where supply current must remain below 100 μA. The LM4050BEM3-2.5/NOPB will not regulate below this threshold, and output voltage may deviate beyond specification.
Does LM4050BEM3-2.5/NOPB require an external capacitor for stability?
No, the LM4050BEM3-2.5/NOPB does not require an external output capacitor for stability. Its internal compensation ensures unconditional stability with any capacitive load, including 0 μF. This eliminates capacitor-related BOM cost, board area, and potential resonance issues - a key advantage over older shunt references like the LM385. The LM4050BEM3-2.5/NOPB remains stable even when driving large ceramic decoupling caps directly.
What is the thermal hysteresis specification for LM4050BEM3-2.5/NOPB?
The LM4050BEM3-2.5/NOPB has a thermal hysteresis of 0.7 mV, measured as the voltage difference at 25°C after cycling from −40°C and from 125°C. This low hysteresis ensures repeatable reference voltage behavior in systems undergoing repeated thermal cycling, such as outdoor instrumentation or automotive ECUs. The value is confirmed in Section 6.6 of the SNOS455G datasheet and applies specifically to the LM4050BEM3-2.5/NOPB Grade B variant.
Can LM4050BEM3-2.5/NOPB be used in automotive applications?
The LM4050BEM3-2.5/NOPB is rated for industrial temperature range (−40°C to 85°C) and is not AEC-Q100 qualified. For automotive applications, TI offers the LM4050-N-Q1 family (e.g., LM4050BEM3-2.5Q1), which is AEC-Q100 Grade 1 qualified (−40°C to 125°C) and manufactured on an automotive-grade flow. Using LM4050BEM3-2.5/NOPB in automotive contexts requires full qualification per customer requirements and is not recommended for safety-critical or production vehicle systems.
What is the reverse dynamic impedance of LM4050BEM3-2.5/NOPB?
The reverse dynamic impedance of LM4050BEM3-2.5/NOPB is 0.3 Ω, measured at 1 mA DC current with 10% AC ripple at 120 Hz. This low impedance ensures minimal output voltage variation under changing load conditions - critical for maintaining ADC reference accuracy when driving multiplexed analog front-ends. The value is specified in Section 6.6 of the SNOS455G datasheet and is consistent across Grade B units at 25°C.
LM4050BEM3-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- 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/NOPB FAQ
1.How can I place an order for LM4050BEM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3-2.5/NOPB 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/NOPB reliable?
The price and inventory of LM4050BEM3-2.5/NOPB 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/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050BEM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3-2.5/NOPB?
LM4050BEM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3-2.5/NOPB 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/NOPB?
For technical support, including LM4050BEM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050BEM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3-2.5/NOPB 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/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050BEM3-2.5/NOPB?
All LM4050BEM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3-2.5/NOPB, 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/NOPB part is unused and in its original packaging.
Return procedure for LM4050BEM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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