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Texas Instruments LM4050QCEM3-2.0/NOPB
- Part No.:
- LM4050QCEM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCEM3-2.0/NOPB.pdf
- Description:
- LM4050-N-Q1 AUTOMOTIVE 50PPM/C P
- Quantity:
- Payment:
- Shipping:
Inventory:17,658
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Product details
Overview
LM4050QCEM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V nominal output with ±0.5% initial tolerance (C-grade), 50 ppm/°C max temperature coefficient, and 60 μA minimum operating current. It operates across −40°C to 125°C and requires no output capacitor, supporting stable regulation with capacitive loads up to 10 nF in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4050QCEM3-2.0/NOPB datasheet, LM4050QCEM3-2.0/NOPB pinout, LM4050QCEM3-2.0/NOPB application, or LM4050QCEM3-2.0/NOPB equivalent, this page provides verified electrical specifications, thermal behavior, shunt regulator terminal roles, automotive-grade qualification status, and real-world implementation guidance for high-accuracy analog signal chains.
Technical Context
The LM4050QCEM3-2.0/NOPB implements a bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation and Zener-zap trim at wafer sort. Its dynamic impedance remains below 0.3 Ω at 1 mA, enabling low-noise operation (41 μVrms, 10 Hz–10 kHz) without external stabilization.
As an AEC-Q100 Grade 1 qualified device, it supports automotive applications with guaranteed performance over −40°C to 125°C ambient, 120 ppm long-term stability after 1000 hours, and thermal hysteresis of ≤0.7 mV - all while maintaining fixed 2.048 V reverse breakdown voltage and tolerating forward currents up to 10 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables precise 12-bit ADC reference scaling (e.g., 0–2.048 V full-scale range) |
| Initial Tolerance | ±0.5% at 25°C (C-grade); defines worst-case DC offset in calibration-critical circuits |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C; limits voltage drift to ±0.102 mV/°C max in automotive environments |
| Min Operating Current | 60 μA at 25°C; allows ultra-low-power operation in sleep-mode sensor nodes |
| Dynamic Impedance | 0.3 Ω at 1 mA, 120 Hz; ensures minimal load-induced voltage sag during transient current demands |
| Output Noise | 41 μVrms, 10 Hz–10 kHz; supports <16-bit ENOB in precision measurement front-ends |
| Long-Term Stability | 120 ppm after 1000 hrs; guarantees <0.25 mV drift over 1 year in sealed industrial modules |
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 regulated voltage rail; sinks all load + reference current; sets output voltage via external resistor |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; establishes 0 V reference for cathode voltage regulation |
| NC (Pin 3) | No internal connection | Left floating per TI specification; no PCB trace or thermal pad required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into space-constrained PCB layouts without stability-compromising bypass components |
| Tolerates capacitive loads | Stable with ≥10 nF load capacitance - eliminates need for series isolation resistors in ADC reference paths |
| AEC-Q100 Grade 1 qualified | Validated for automotive powertrain and chassis applications with junction temperature support up to 125°C |
| Low 41 μVrms noise | Preserves SNR in 16-bit SAR ADCs without additional filtering, reducing BOM count and board area |
| Wide operating current range | Functional from 60 μA to 15 mA - supports both ultra-low-power wake-up circuits and higher-current analog subsystems |
Applications
| Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable handheld multimeter measuring 0–2.048 V DC signals with 12-bit resolution. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V reference for ADC and DAC conversion. Use Value: Enables exact 1 LSB = 0.5 mV scaling without trimming; ±0.5% tolerance avoids factory calibration overhead. |
Use Scenario: Engine coolant temperature sensor interface in Tier-1 ECU with extended temperature range requirement. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric RTD-to-digital conversion under −40°C to 125°C ambient. Use Value: 50 ppm/°C tempco ensures <±1.3 mV error over full range; AEC-Q100 Grade 1 qualification validates reliability. |
| Industrial Data Acquisition Modules | Precision Audio Reference Supply |
Use Scenario: 16-channel isolated analog input module sampling thermocouples and strain gauges. IC Role / Device Role / Timing Role: Shared shunt reference for multiple 24-bit sigma-delta ADCs requiring correlated accuracy. Use Value: 41 μVrms noise prevents degradation of effective resolution; 120 ppm long-term stability reduces recalibration frequency. |
Use Scenario: High-fidelity audio DAC reference supply in professional recording equipment. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference for DAC internal reference buffer. Use Value: Sub-50 μVrms noise preserves THD+N spec; no-output-capacitor design avoids capacitor-induced microphonics. |
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 2.5 V reference; 2% initial tolerance; 50 Ω dynamic impedance; requires external resistors for 2.048 V setting | Not suitable for space-constrained layouts due to resistor network; higher noise (120 μVrms) | Select when adjustable output or cost sensitivity outweighs precision and noise requirements |
| REF3020AIDBZR | 2.048 V series reference; 0.2% initial tolerance; 3.3 μA quiescent current; requires 1 μF output capacitor | Higher accuracy but larger solution size; incompatible with capacitor-free designs | Select when ultra-low quiescent current and tighter tolerance justify added capacitor and footprint |
Compared with TL431CDBZR and REF3020AIDBZR, LM4050QCEM3-2.0/NOPB uniquely combines fixed 2.048 V output, capacitor-free operation, automotive qualification, and sub-50 μVrms noise in a 3-pin SOT-23 - making it optimal for compact, high-reliability, low-noise shunt reference use cases.
Availability
LM4050QCEM3-2.0/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, industrial data acquisition modules, and precision audio reference supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QCEM3-2.0/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 and automotive-qualified components.
The LM4050-N/-Q1 product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy applications including portable test equipment, automotive sensors, and industrial process control systems.
FAQ
What is the output voltage tolerance of LM4050QCEM3-2.0/NOPB at 25°C?
The LM4050QCEM3-2.0/NOPB has a ±0.5% initial output voltage tolerance at 25°C (C-grade), corresponding to ±10.24 mV around the nominal 2.048 V reverse breakdown voltage. This tolerance is production-tested and specified in Section 6.5 of the SNOS455G datasheet.
Does LM4050QCEM3-2.0/NOPB require an external output capacitor?
No, LM4050QCEM3-2.0/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks - a key advantage over many competing shunt references.
Is LM4050QCEM3-2.0/NOPB qualified for automotive applications?
Yes, LM4050QCEM3-2.0/NOPB is AEC-Q100 Grade 1 qualified (−40°C to 125°C ambient), manufactured on an automotive-grade flow, and explicitly designated as LM4050-N-Q1 in TI documentation - confirming its suitability for safety-critical automotive subsystems.
What is the minimum operating current for LM4050QCEM3-2.0/NOPB?
The LM4050QCEM3-2.0/NOPB requires a minimum operating current of 60 μA at 25°C and 65 μA across the full −40°C to 125°C temperature range. Below this threshold, regulation is not guaranteed and output voltage may deviate significantly from 2.048 V.
How does LM4050QCEM3-2.0/NOPB compare to LM4050AIM3-2.0/NOPB?
LM4050QCEM3-2.0/NOPB (C-grade) offers ±0.5% initial tolerance and is AEC-Q100 Grade 1 qualified, whereas LM4050AIM3-2.0/NOPB (A-grade) provides tighter ±0.1% tolerance but lacks automotive qualification. Both share identical 2.048 V nominal output, SOT-23 package, and electrical characteristics except tolerance and qualification status.
LM4050QCEM3-2.0/NOPB 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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 34µVrms
- 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
LM4050QCEM3-2.0/NOPB FAQ
1.How can I place an order for LM4050QCEM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCEM3-2.0/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 LM4050QCEM3-2.0/NOPB reliable?
The price and inventory of LM4050QCEM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCEM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCEM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCEM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCEM3-2.0/NOPB?
LM4050QCEM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCEM3-2.0/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 LM4050QCEM3-2.0/NOPB?
For technical support, including LM4050QCEM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCEM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050QCEM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCEM3-2.0/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 LM4050QCEM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCEM3-2.0/NOPB?
All LM4050QCEM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCEM3-2.0/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 LM4050QCEM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCEM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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