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Texas Instruments LM4050CEM3-2.5/NOPB
- Part No.:
- LM4050CEM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CEM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:225
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Product details
Overview
LM4050CEM3-2.5/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 ±13 mV (±0.5%) initial tolerance at 25°C, 41 μVrms wideband noise (10 Hz–10 kHz), and 50 ppm/°C max temperature coefficient across −40°C to 125°C. It operates from 65 μA to 15 mA and requires no output capacitor-ideal for high-accuracy ADC biasing in portable instrumentation.
For engineers reviewing the LM4050CEM3-2.5/NOPB datasheet, LM4050CEM3-2.5/NOPB pinout, LM4050CEM3-2.5/NOPB application, or LM4050CEM3-2.5/NOPB equivalent, key selection criteria include its C-grade 2.5 V reference accuracy, SOT-23 thermal performance (RθJA = 287°C/W), capacitive-load stability, and automotive-qualified alternatives for safety-critical sensing systems.
Technical Context
The LM4050CEM3-2.5/NOPB uses bandgap-derived Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its dynamic impedance remains ≤0.3 Ω at 1 mA, enabling stable regulation under varying load currents from 65 μA to 15 mA without external capacitance.
It achieves ±13 mV (±0.5%) output tolerance over −40°C to 125°C via fuse-trimmed wafer-sort calibration and exhibits 0.7 mV thermal hysteresis after cycling between −40°C and 125°C-critical for repeatable calibration in field-deployed test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; fixed reverse breakdown voltage for precision biasing of ADCs, DACs, and comparators. |
| Initial Tolerance | ±13 mV (±0.5%) at 25°C; C-grade accuracy suitable for cost-sensitive industrial measurement where <±0.1% is not required. |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to 125°C; ensures <±1.3 mV total drift across full extended temperature range. |
| Operating Current | 65 μA min to 15 mA max; supports ultra-low-power sensor nodes and high-current analog front-ends without redesign. |
| Noise (10 Hz–10 kHz) | 41 μVrms typical; low enough for 16-bit SAR ADC reference without additional filtering. |
| Dynamic Impedance | 0.3 Ω typical at 1 mA; minimizes load-induced voltage shift in multipoint sensing networks. |
| Long-Term Stability | 120 ppm over 1000 hrs; predictable aging behavior for recalibration-interval planning in metrology tools. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178AC compliant. Thermal resistance RθJA = 287°C/W (board mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Connects to supply rail; sinks all operating current plus load current; sets regulated 2.5 V at this node relative to Anode. |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground or lowest potential point; defines 0 V reference for 2.5 V output. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or solder mask relief required; electrically isolated. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load up to 100 nF-eliminates BOM cost and board space for decoupling caps in space-constrained designs. |
| Tolerates capacitive loads | Guaranteed stability with >100 nF load capacitance-enables direct driving of ADC sample-and-hold inputs without series resistance. |
| Fixed 2.5 V breakdown | Matches standard DAC/ADC full-scale references and microcontroller VREF+ inputs-no resistor divider needed. |
| Wide operating current range | 65 μA to 15 mA operation enables use in both battery-powered sensors and high-speed data acquisition systems. |
| Low temperature coefficient | 50 ppm/°C max ensures <±1.3 mV error over −40°C to 125°C-meets Class I industrial calibration requirements. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and lithium coin-cell power. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V VREF for ADC conversion accuracy. Use Value: 41 μVrms noise and 65 μA minimum current enable >100 kSPS sampling with <1 LSB INL error on battery life >1 year. |
Use Scenario: Modular DAQ module with multiple 12-bit SAR ADCs sharing a common reference. IC Role / Device Role / Timing Role: Centralized precision reference source for multi-channel analog signal conditioning. Use Value: 0.3 Ω dynamic impedance prevents channel-to-channel crosstalk during simultaneous sampling events. |
| Process Control Sensors | Precision Audio Components |
Use Scenario: Loop-powered 4–20 mA transmitter with onboard temperature-compensated RTD interface. IC Role / Device Role / Timing Role: Stable excitation reference for Wheatstone bridge and ADC reference. Use Value: ±13 mV initial tolerance and 50 ppm/°C TC ensure <0.1% full-scale error over plant ambient range (−25°C to 70°C). |
Use Scenario: High-fidelity audio ADC front-end requiring ultra-low-noise analog biasing. IC Role / Device Role / Timing Role: Low-noise DC reference for op-amp gain-setting and ADC VREF. Use Value: 41 μVrms noise (10 Hz–10 kHz) contributes <−108 dB THD+N floor-preserves 24-bit dynamic range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C25IDBZR | Same 2.5 V, C-grade (±0.5%), but SOT-23-3 with different pinout (Anode/Cathode swapped); 75 μA min current; 45 μVrms noise. | Requires PCB layout revision due to reversed Anode/Cathode pins; slightly higher noise limits 18-bit ADC use. | Select when TI second-source compatibility is required and board re-spin is acceptable. |
| ADR3425ARJZ-R7 | 2.5 V, A-grade (±0.1%), 35 μVrms noise, 50 ppm/°C TC, but requires 100 nF output cap; 100 μA min current. | Higher accuracy and lower noise, but capacitor dependency increases BOM count and reduces layout flexibility. | Select for metrology-grade accuracy where added capacitor and current overhead are acceptable. |
Compared with LM4050CEM3-2.5/NOPB, LM4040C25IDBZR offers identical grade and voltage but demands pinout-aware layout changes, while ADR3425ARJZ-R7 delivers tighter tolerance and lower noise at the cost of mandatory external capacitance and higher minimum current-making LM4050CEM3-2.5/NOPB optimal for cost-sensitive, space-constrained shunt reference applications.
Availability
LM4050CEM3-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, process control sensors, and precision audio components requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050CEM3-2.5/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs since 1930.
The LM4050-N product line was designed for space-constrained, micropower applications demanding stable voltage references without external capacitors-targeting portable test gear, industrial sensors, and automotive subsystems.
FAQ
What is the minimum operating current for LM4050CEM3-2.5/NOPB?
The LM4050CEM3-2.5/NOPB requires a minimum operating current of 65 μA across its full temperature range (−40°C to 125°C). At 25°C, the typical minimum is 60 μA. This low quiescent current enables use in battery-powered devices with multi-year operational life, and the device remains stable even when sinking only this minimal current into the cathode terminal.
Does LM4050CEM3-2.5/NOPB require an output capacitor?
No, the LM4050CEM3-2.5/NOPB does not require an output capacitor for stability. Its internal design tolerates any capacitive load-including ADC input capacitance or long PCB traces-without oscillation. This eliminates the need for external decoupling components, reducing bill-of-materials cost and PCB area in compact designs where LM4050CEM3-2.5/NOPB serves as the primary reference.
What is the temperature coefficient specification for LM4050CEM3-2.5/NOPB?
The LM4050CEM3-2.5/NOPB has a maximum average temperature coefficient of 50 ppm/°C over the extended temperature range of −40°C to 125°C. This translates to a worst-case voltage drift of ±1.3 mV across the full range, ensuring predictable performance in industrial environments where LM4050CEM3-2.5/NOPB is used for calibration-critical analog signal chains.
How does the LM4050CEM3-2.5/NOPB compare to A-grade versions in accuracy?
The LM4050CEM3-2.5/NOPB is a C-grade device with ±13 mV (±0.5%) initial tolerance at 25°C, versus ±2.5 mV (±0.1%) for A-grade variants like LM4050AIM3-2.5/NOPB. While less accurate, LM4050CEM3-2.5/NOPB maintains identical noise (41 μVrms), dynamic impedance (0.3 Ω), and temperature coefficient (50 ppm/°C), making it ideal for cost-optimized applications where ±0.5% meets system-level accuracy requirements.
Is LM4050CEM3-2.5/NOPB qualified for automotive applications?
No, LM4050CEM3-2.5/NOPB is not AEC-Q100 qualified. It belongs to the industrial-grade LM4050-N family. For automotive use, TI offers the LM4050-N-Q1 series (e.g., LM4050CQEM3-2.5/NOPB), which is AEC-Q100 Grade 1 qualified (−40°C to 125°C) and manufactured on an automotive-grade flow-LM4050CEM3-2.5/NOPB itself lacks that qualification and should not be deployed in safety-critical vehicle systems.
LM4050CEM3-2.5/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:
- ±0.5%
- 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
LM4050CEM3-2.5/NOPB FAQ
1.How can I place an order for LM4050CEM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CEM3-2.5/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 LM4050CEM3-2.5/NOPB reliable?
The price and inventory of LM4050CEM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CEM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050CEM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CEM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CEM3-2.5/NOPB?
LM4050CEM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CEM3-2.5/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 LM4050CEM3-2.5/NOPB?
For technical support, including LM4050CEM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CEM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050CEM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050CEM3-2.5/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 LM4050CEM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050CEM3-2.5/NOPB?
All LM4050CEM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CEM3-2.5/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 LM4050CEM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050CEM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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