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Texas Instruments LM4050QCEM3X10/NOPB
- Part No.:
- LM4050QCEM3X10/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCEM3X10/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,922
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Product details
Overview
LM4050QCEM3X10/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 10V reverse breakdown voltage with ±0.5% initial tolerance (C-grade), 50ppm/°C max temperature coefficient, and 150μVrms wideband noise (10Hz–10kHz) at 150μA operating current. It operates from −40°C to 125°C and supports stable regulation without output capacitance in battery-powered instrumentation and automotive metering systems.
For engineers reviewing the LM4050QCEM3X10/NOPB datasheet, LM4050QCEM3X10/NOPB pinout, LM4050QCEM3X10/NOPB application, or LM4050QCEM3X10/NOPB equivalent, key selection criteria include its 10V fixed output, AEC-Q100 Grade 1 qualification, 100μA minimum operating current, low dynamic impedance (0.7Ω), and thermal hysteresis of 2.8mV - all critical for high-accuracy ADC/DAC reference and closed-loop shunt regulator designs.
Technical Context
The LM4050QCEM3X10/NOPB implements a curvature-corrected bandgap architecture with Zener-zap trim at wafer sort, enabling ±0.5% initial accuracy and stable 10V regulation across −40°C to 125°C. Its internal compensation eliminates external capacitor requirements while maintaining stability with capacitive loads up to 10nF.
As a two-terminal shunt device, it regulates by sinking cathode current (IR = 150μA to 15mA) to maintain 10V between cathode and anode. The no-connection (NC) pin (Pin 3) must be left floating or tied to anode to avoid EMI-induced errors - a design constraint confirmed for SOT-23 DBZ packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10V nominal reverse breakdown voltage at 150μA - enables direct 12-bit DAC/ADC reference with 2.44mV LSB on 10V full-scale. |
| Initial Tolerance | ±0.5% (C-grade) at 25°C - corresponds to ±50mV absolute error, suitable for mid-precision industrial metering. |
| Temp Coefficient | ±50ppm/°C max over −40°C to 125°C - contributes ≤±5.5mV drift across full range, critical for temperature-stable references. |
| Min Operating Current | 100μA (typical) at 25°C - sets minimum bias for regulation; increases to 110μA at 125°C. |
| Dynamic Impedance | 0.7Ω at 1mA, 120Hz - ensures <1mV load regulation error for ≤1mA current variations in shunt configurations. |
| Wideband Noise | 150μVrms (10Hz–10kHz) at 150μA - limits effective resolution to ~15.5 ENOB in 16-bit ADC applications. |
| Long-Term Stability | 120ppm after 1000 hours - equates to ±1.2mV drift, supporting 5+ year calibration intervals in energy meters. |
Pinout & Package
SOT-23 (DBZ) package, 2.92mm × 1.30mm body size, surface-mount, rated for −40°C to 125°C operation. Pin 3 is NC (no internal connection) and must be left floating or connected to Pin 2 per TI layout guidance for EMI immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Receives total current (IQ + IL); voltage regulated at 10V relative to anode; requires series resistor (RS) for current limiting. |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; serves as voltage reference point; parasitic Schottky diode exists to Pin 3. |
| NC (Pin 3) | No internal connection | Not bonded; floating by default; tie to Pin 2 in high-EMI environments to suppress noise coupling into die attach interface. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive applications with operation up to 125°C junction temperature and robust ESD rating (±2kV HBM). |
| No output capacitor required | Internally compensated for stability with any capacitive load - eliminates BOM cost and board space for bypass caps in portable designs. |
| Tolerates capacitive loads | Maintains phase margin >45° with up to 10nF load capacitance - enables direct driving of ADC sample-and-hold inputs. |
| Low micropower operation | 100μA minimum cathode current enables >10-year battery life in coin-cell-powered sensors and IoT endpoints. |
| Fixed 10V breakdown option | Optimized for 10V full-scale 12-bit systems (2.44mV/LSB) and ±10V op-amp clamping circuits requiring precise symmetric rails. |
Applications
| Battery-Powered Instrumentation | Automotive Energy Metering |
|---|---|
|
Use Scenario: Portable multimeter measuring 0–10V DC signals with 12-bit SAR ADC. IC Role / Device Role / Timing Role: 10V shunt reference providing stable full-scale voltage for ADC conversion. Use Value: Enables 2.44mV LSB resolution without trimming; ±0.5% tolerance and 50ppm/°C TC meet Class 0.5 metering accuracy standards. |
Use Scenario: Onboard EV battery pack monitor measuring cell stack voltage up to 400V via resistive divider. IC Role / Device Role / Timing Role: Precision 10V reference for isolated sigma-delta ADC front-end in high-voltage sensing module. Use Value: AEC-Q100 Grade 1 qualification ensures reliability under automotive thermal cycling; 120ppm long-term stability supports 10-year calibration validity. |
| Industrial Process Control | Precision Audio Level Detection |
|
Use Scenario: 4–20mA loop-powered transmitter conditioning analog sensor outputs for PLC input. IC Role / Device Role / Timing Role: Shunt reference establishing 10V rail for op-amp signal conditioning and DAC output scaling. Use Value: 0.7Ω dynamic impedance minimizes gain error in current-to-voltage conversion; 150μVrms noise avoids audible artifacts in 24-bit audio monitoring paths. |
Use Scenario: Digital audio workstation (DAW) hardware detecting peak input levels with ±10V clipping threshold. IC Role / Device Role / Timing Role: Clamping reference in bounded amplifier circuit defining symmetrical ±10V saturation limits. Use Value: Fixed 10V breakdown enables exact ±11.5V clamping (10V + 2×0.7V diode drops); NC pin grounding suppresses RF interference in studio-grade analog stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C10IDBZR | Same 10V C-grade output, ±0.5% tolerance, but rated only to 85°C (industrial temp) and lacks AEC-Q100 qualification. | Not suitable for under-hood automotive use; acceptable for industrial control panels with ambient <85°C. | Select when cost sensitivity outweighs extended temperature or automotive compliance requirements. |
| REF5010AIDR | 10V series reference with ±0.05% initial accuracy, 3ppm/°C TC, but requires 1.2mA quiescent current and external decoupling. | Higher accuracy and lower drift, but incompatible with micropower (<100μA) or shunt topology constraints. | Choose only if system demands sub-10ppm/°C drift and can support series-reference supply overhead. |
Compared with TL4050C10IDBZR, LM4050QCEM3X10/NOPB adds automotive qualification and extended temperature range at identical accuracy; versus REF5010AIDR, it trades 10× lower quiescent current and shunt simplicity for reduced absolute precision - making it optimal for cost-constrained, battery-aware, or high-temp shunt regulator designs.
Availability
LM4050QCEM3X10/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive energy metering, and industrial process control requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050QCEM3X10/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 over 50 years of precision reference design heritage.
The LM4050-N/Q1 product line delivers micropower shunt voltage references optimized for space-constrained, high-reliability applications including automotive, industrial, and portable instrumentation where fixed-output accuracy and thermal stability are critical.
FAQ
What is the maximum operating current for LM4050QCEM3X10/NOPB?
The LM4050QCEM3X10/NOPB supports a maximum cathode current of 15mA. Exceeding this value risks thermal overstress, as power dissipation is limited to 280mW at 25°C ambient. Derating is required above 25°C using RθJA = 287°C/W; at 125°C ambient, maximum safe current drops to ~1.2mA. Always verify junction temperature in final layout using Equation PD = (VS − 10V) × IR.
Is LM4050QCEM3X10/NOPB pin-compatible with other LM4050 variants?
Yes - all LM4050-N and LM4050-N-Q1 SOT-23 variants (including LM4050QCEM3X10/NOPB) share identical DBZ package pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC. However, voltage options (2.048V–10V) and grades (A/B/C) are not electrically interchangeable; substituting a different voltage variant will cause incorrect regulation.
Does LM4050QCEM3X10/NOPB require an external capacitor for stability?
No - the LM4050QCEM3X10/NOPB is internally compensated and remains stable without any output capacitor. It tolerates capacitive loads up to 10nF, making it ideal for direct connection to ADC sample-and-hold inputs or op-amp feedback networks. Adding a 100nF ceramic capacitor is permissible but unnecessary for stability.
What does the 'Q' and 'C' in LM4050QCEM3X10/NOPB signify?
The 'Q' denotes AEC-Q100 Grade 1 qualification for automotive applications; 'C' indicates ±0.5% initial output tolerance (C-grade). 'EM3' specifies SOT-23 (DBZ) package; 'X10' confirms 10V nominal output; '/NOPB' certifies lead-free and RoHS-compliant construction. This full designation ensures traceability to TI's automotive-grade manufacturing flow.
How does thermal hysteresis affect LM4050QCEM3X10/NOPB in precision systems?
LM4050QCEM3X10/NOPB exhibits 2.8mV thermal hysteresis - the voltage shift measured at 25°C after cycling between −40°C and 125°C. In metrology-grade systems requiring <0.1% repeatability, this introduces a non-repeatable offset that must be characterized during calibration. It is distinct from temperature coefficient and cannot be compensated digitally.
LM4050QCEM3X10/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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 150µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 110 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QCEM3X10/NOPB FAQ
1.How can I place an order for LM4050QCEM3X10/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCEM3X10/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 LM4050QCEM3X10/NOPB reliable?
The price and inventory of LM4050QCEM3X10/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCEM3X10/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCEM3X10/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCEM3X10/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCEM3X10/NOPB?
LM4050QCEM3X10/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCEM3X10/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 LM4050QCEM3X10/NOPB?
For technical support, including LM4050QCEM3X10/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCEM3X10/NOPB requirements.
6.How does Aetrix verify that LM4050QCEM3X10/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCEM3X10/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 LM4050QCEM3X10/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCEM3X10/NOPB?
All LM4050QCEM3X10/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCEM3X10/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 LM4050QCEM3X10/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCEM3X10/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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