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Texas Instruments LM4050QAEM3-2.5/NOPB
- Part No.:
- LM4050QAEM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAEM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,946
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Product details
Overview
LM4050QAEM3-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.500 V nominal reverse breakdown voltage with ±2.5 mV (±0.1%) 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 60 μA to 15 mA cathode current and requires no external output capacitor.
For engineers reviewing the LM4050QAEM3-2.5/NOPB datasheet, LM4050QAEM3-2.5/NOPB pinout, LM4050QAEM3-2.5/NOPB application, or LM4050QAEM3-2.5/NOPB equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, extended temperature range support, low-noise performance in battery-powered instrumentation, and stable operation with capacitive loads without compensation.
Technical Context
The LM4050QAEM3-2.5/NOPB implements a curvature-corrected bandgap reference architecture with Zener-zap trim for ±0.1% accuracy, enabling stable 2.5 V regulation over wide current (60 μA–15 mA) and temperature (−40°C to 125°C) ranges. Its internal compensation eliminates need for external stabilization capacitance while maintaining stability with any capacitive load.
As a two-terminal shunt device, it functions as a precision voltage sink between cathode and anode, where regulation depends on cathode current magnitude. The NC pin (Pin 3) must be left floating or tied to anode to avoid interference in high-EMI environments - a design constraint confirmed in TI's DBZ package functional description.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal at 100 μA cathode current; enables precise 12-bit ADC/DAC scaling with 1 mV LSB when paired with 2.5 V rails. |
| Initial Tolerance | ±2.5 mV (±0.1%) at 25°C - supports high-accuracy calibration without post-manufacture trimming. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C - ensures ≤±125 μV drift across full operating range. |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz) - critical for low-noise data acquisition and precision analog front-ends. |
| Operating Current | 60 μA min / 15 mA max cathode current - allows ultra-low-power operation and robust load regulation. |
| Dynamic Impedance | 0.3 Ω at 1 mA, 120 Hz - minimizes output voltage shift under dynamic load transients. |
| Long-Term Stability | 120 ppm after 1000 hrs - ensures consistent reference accuracy over product lifetime. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed die attach pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Input/Output node | Shunt current entry point; voltage regulated relative to anode; connects to supply rail via series resistor (RS). |
| Anode (Pin 2) | Reference ground | Common return path; must be connected to system ground; serves as voltage reference baseline. |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 (anode); prevents EMI coupling in noisy environments per TI layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for stability with any capacitive load - reduces BOM count and PCB area in space-constrained designs. |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications operating from −40°C to 125°C - meets stringent reliability and qualification requirements. |
| Fixed 2.5 V output | Eliminates external feedback resistors - simplifies design and improves long-term ratio-metric accuracy in ADC references. |
| Low 41 μVrms noise | Enables <12-bit effective resolution in precision measurement systems without additional filtering. |
| Micropower operation | 60 μA minimum cathode current supports >10-year battery life in portable instrumentation and remote sensors. |
Applications
| Battery-Powered Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter or handheld sensor node powered by coin-cell or Li-ion battery. IC Role / Device Role / Timing Role: Precision 2.5 V shunt reference for ADC biasing and signal conditioning. Use Value: Enables 12-bit measurement resolution with <±0.1% total error budget over temperature and battery discharge cycle. |
Use Scenario: Industrial PLC analog input module acquiring 4–20 mA or thermocouple signals. IC Role / Device Role / Timing Role: Stable reference for sigma-delta ADCs and programmable gain amplifiers. Use Value: Maintains <±0.01% gain error stability across −40°C to 85°C ambient, reducing calibration frequency. |
| Automotive Electronics | Precision Audio Signal Chain |
Use Scenario: Engine control unit (ECU) sensor interface for pressure or temperature monitoring. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1–qualified voltage reference for analog front-end signal conditioning. Use Value: Guarantees ±2.5 mV accuracy over −40°C to 125°C junction temperature, meeting ASIL-B functional safety margins. |
Use Scenario: High-fidelity DAC-based audio player requiring low-noise analog output stage. IC Role / Device Role / Timing Role: Low-noise 2.5 V reference for DAC VREF and op-amp bias networks. Use Value: 41 μVrms noise contributes <−107 dB THD+N floor, preserving dynamic range in 24-bit audio paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C25IDBZR | ±0.5% initial tolerance (C-grade), 100 ppm/°C max tempco, 65 μVrms noise - lower accuracy and higher drift than LM4050QAEM3-2.5/NOPB. | Acceptable for cost-sensitive industrial controls but unsuitable for automotive or metrology-grade systems. | Select when budget constraints outweigh precision requirements and AEC-Q100 qualification is unnecessary. |
| ADR3425ARJZ-R7 | Series reference (not shunt); 2.5 V output, ±0.1% tolerance, 10 ppm/°C max tempco, 9 μVrms noise - superior specs but requires different topology and higher quiescent current (100 μA min). | Requires redesign of bias network; incompatible with shunt-based current-sinking configurations. | Choose only if system allows series topology and demands ultra-low noise/temperature drift - not a drop-in replacement. |
Compared with TL4050C25IDBZR and ADR3425ARJZ-R7, the LM4050QAEM3-2.5/NOPB uniquely combines AEC-Q100 Grade 1 qualification, shunt topology simplicity, and ±0.1% accuracy in SOT-23 - making it optimal for automotive and portable precision analog systems where layout space and qualification compliance are non-negotiable.
Availability
LM4050QAEM3-2.5/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, and precision data acquisition systems requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050QAEM3-2.5/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 and embedded processing technologies, with decades of expertise in precision reference design and automotive-grade component validation.
The LM4050-N family was engineered specifically for space-constrained, high-accuracy analog systems - targeting battery-powered instrumentation, automotive ECUs, and industrial data acquisition where micropower operation, low noise, and extended temperature reliability are mandatory.
FAQ
What is the maximum operating temperature range for LM4050QAEM3-2.5/NOPB?
The LM4050QAEM3-2.5/NOPB is rated for operation from −40°C to +125°C ambient temperature, meeting extended temperature range specifications. This rating is validated per AEC-Q100 Grade 1 requirements and confirmed in TI's Electrical Characteristics table for the "Extended Temperature Range" condition. The device maintains ±2.5 mV output tolerance and ≤50 ppm/°C temperature coefficient across this full range.
Does LM4050QAEM3-2.5/NOPB require an external output capacitor?
No, the LM4050QAEM3-2.5/NOPB does not require an external output capacitor due to internal compensation. TI's datasheet explicitly states it remains stable with any capacitive load and eliminates need for external stabilization. However, a bypass capacitor may be added if desired - it will not degrade stability, unlike conventional shunt references.
What is the minimum cathode current needed for regulation in LM4050QAEM3-2.5/NOPB?
The LM4050QAEM3-2.5/NOPB requires a minimum cathode current of 60 μA at 25°C to maintain regulation, increasing to 65 μA across the full −40°C to 125°C temperature range. This value is specified in Section 5.6 (Electrical Characteristics: 2.5V Option) of the TI datasheet and is critical for sizing the series resistor (RS) in shunt regulator designs.
Is LM4050QAEM3-2.5/NOPB pin-compatible with other LM4050 variants?
Yes, all LM4050-N and LM4050-N-Q1 variants in SOT-23 (DBZ) package share identical pinout: Cathode (Pin 1), Anode (Pin 2), and NC (Pin 3). The LM4050QAEM3-2.5/NOPB uses the same DBZ footprint and pin function mapping as LM4050AIM3-2.5 and LM4050BEM3-2.5 - enabling direct substitution within the same voltage grade and package variant.
How does the NC pin (Pin 3) affect LM4050QAEM3-2.5/NOPB performance?
Pin 3 is a no-connect terminal with no internal bond wire; TI recommends leaving it floating or connecting it to Pin 2 (Anode) - especially in high-EMI environments near transformers or switching regulators. Improper handling (e.g., tying to voltage rails or leaving unterminated in noisy layouts) can induce measurement errors or instability, as documented in the "Pin Configuration and Functions" section of the datasheet.
LM4050QAEM3-2.5/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:
- ±0.1%
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QAEM3-2.5/NOPB FAQ
1.How can I place an order for LM4050QAEM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAEM3-2.5/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 LM4050QAEM3-2.5/NOPB reliable?
The price and inventory of LM4050QAEM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAEM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAEM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAEM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QAEM3-2.5/NOPB?
LM4050QAEM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAEM3-2.5/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 LM4050QAEM3-2.5/NOPB?
For technical support, including LM4050QAEM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAEM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050QAEM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAEM3-2.5/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 LM4050QAEM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAEM3-2.5/NOPB?
All LM4050QAEM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAEM3-2.5/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 LM4050QAEM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAEM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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