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Texas Instruments LM4050QCEM3-5.0/NOPB
- Part No.:
- LM4050QCEM3-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCEM3-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,386
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Product details
Overview
LM4050QCEM3-5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 5.0 V reverse breakdown voltage with ±5 mV (±0.1%) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA cathode current across −40°C to 125°C, enabling use in high-accuracy ADC/DAC biasing and automotive sensor signal conditioning.
For engineers reviewing the LM4050QCEM3-5.0/NOPB datasheet, LM4050QCEM3-5.0/NOPB pinout, LM4050QCEM3-5.0/NOPB application, or LM4050QCEM3-5.0/NOPB equivalent, this page provides verified electrical specs, validated pin functions, automotive-grade thermal performance data, and real-world implementation guidance for space-constrained precision analog designs.
Technical Context
The LM4050QCEM3-5.0/NOPB implements a curvature-corrected bandgap shunt reference architecture with internal Zener-zap trim for ±0.1% initial accuracy. Its dynamic impedance is 0.5 Ω at 1 mA, enabling stable regulation under varying load currents without external capacitors.
As an AEC-Q100 Grade 1 qualified device, it supports automotive applications with guaranteed operation from −40°C to +125°C ambient, 50 ppm/°C max tempco over full range, and thermal hysteresis of 1.4 mV after cycling between −40°C and 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage at 100 μA cathode current - sets precise ADC full-scale or DAC reference point. |
| Initial Tolerance | ±5 mV (±0.1%) at 25°C - enables 12-bit system accuracy without calibration. |
| Tempco | ≤50 ppm/°C over −40°C to +125°C - ensures <±0.625 mV drift across automotive temperature range. |
| Noise (10 Hz–10 kHz) | 93 μVrms - limits quantization error in 16-bit+ data acquisition systems. |
| Operating Current Range | 74 μA min to 15 mA max - supports ultra-low-power battery sensors and high-current precision buffers. |
| Dynamic Impedance | 0.5 Ω at 1 mA - maintains output stability against load transients up to 100 kHz. |
| Long-Term Stability | 120 ppm after 1000 hrs - ensures reference integrity in metering and industrial control deployments. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed die attach pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage regulation node | Receives total current (IQ + IL) from series resistor; voltage develops across cathode–anode per Zener characteristic. |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; serves as voltage reference point for all measurements and feedback paths. |
| NC (Pin 3) | No internal connection | Die attach interface contact; must be left floating or tied to Pin 2 to avoid EMI-induced errors in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for stability with any capacitive load - eliminates BOM cost and layout area for bypass caps. |
| Automotive qualification | AEC-Q100 Grade 1 certified - qualified for engine control, ADAS sensors, and infotainment power rails. |
| Capacitive load tolerance | Stable with >100 nF ceramic or tantalum loads - supports direct coupling to ADC sample-and-hold inputs. |
| Low quiescent current | 74 μA minimum operating current - extends battery life in portable instrumentation and wireless sensors. |
| Fixed 5.0 V option | Optimized for 5 V supply systems and legacy 12-bit ADCs requiring exact 5.000 V reference - avoids resistor-divider errors. |
Applications
| Battery-Powered Precision Sensors | Automotive Engine Control Units |
|---|---|
Use Scenario: Low-power gas concentration sensor with 16-bit sigma-delta ADC in tire pressure monitoring system. IC Role / Device Role / Timing Role: Provides stable 5.0 V reference for ADC conversion, rejecting supply ripple and thermal drift. Use Value: Enables ±0.1% measurement accuracy over −40°C to +105°C without calibration, meeting ISO 26262 ASIL-B requirements. |
Use Scenario: Throttle position sensor signal conditioning in gasoline direct injection engine management. IC Role / Device Role / Timing Role: Supplies regulated 5.0 V bias to potentiometer and op-amp front-end under wide battery voltage swing (6–16 V). Use Value: Maintains <±1 LSB error across 125°C junction temperature, eliminating cold-start drift compensation firmware. |
| Industrial Energy Metering | Medical Portable Diagnostic Devices |
Use Scenario: Polyphase electricity meter using 24-bit metrology ADC with anti-aliasing filter. IC Role / Device Role / Timing Role: Acts as primary voltage reference for ADC and secondary reference for isolated current-sense amplifier. Use Value: Delivers 93 μVrms noise floor and 120 ppm long-term stability - meets IEC 62053-21 Class 0.2 accuracy over 10-year field life. |
Use Scenario: Handheld ECG monitor with 12-bit SAR ADC sampling at 1 kSPS on single coin-cell battery. IC Role / Device Role / Timing Role: Generates ultra-stable 5.0 V reference for analog front-end while drawing only 74 μA quiescent current. Use Value: Extends battery runtime to >120 hours per charge while maintaining clinical-grade signal fidelity (SNR > 72 dB). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | ±0.5% initial tolerance (C grade), 100 ppm/°C max tempco, non-automotive qualified | Cost-sensitive industrial controls where AEC-Q100 not required | Select when ±0.5% accuracy and −40°C to +85°C operation suffice; lower cost but no automotive traceability. |
| REF5050QPWR | Series reference (not shunt), 5.0 V output, ±0.05% initial tolerance, 3 ppm/°C tempco, SOIC-8 package | High-precision lab equipment requiring lowest possible drift and noise | Choose for metrology-grade systems needing sub-ppm stability; requires higher supply headroom and larger PCB area. |
Compared with TL4050C50IDBZR, LM4050QCEM3-5.0/NOPB delivers 5× tighter initial tolerance and automotive qualification; versus REF5050QPWR, it offers 3× smaller footprint and shunt topology compatibility with existing low-headroom designs, though with higher tempco and noise.
Availability
LM4050QCEM3-5.0/NOPB is available at Aetrix Electronics and suitable for automotive electronics, precision data acquisition, and energy metering applications requiring stable component supply with full AEC-Q100 documentation and lot-level traceability.
Supply support for LM4050QCEM3-5.0/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 leader specializing in analog and embedded processing technologies, with over 50 years of precision reference design heritage and automotive-grade manufacturing capability.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy analog systems in automotive, industrial, and medical applications - emphasizing AEC-Q100 compliance, low noise, and zero-capacitor stability.
FAQ
What is the maximum operating current for LM4050QCEM3-5.0/NOPB?
The LM4050QCEM3-5.0/NOPB supports a maximum cathode current of 15 mA. Exceeding this value risks thermal overstress and permanent degradation of the 5.0 V reference accuracy. Derating is required above 85°C ambient per the 287°C/W junction-to-ambient thermal resistance specification.
Does LM4050QCEM3-5.0/NOPB require an external capacitor for stability?
No - the LM4050QCEM3-5.0/NOPB is internally compensated and remains stable with any capacitive load, including direct connection to ADC input capacitors. An external capacitor may be added for additional high-frequency noise filtering but is not required for loop stability.
What is the minimum cathode current needed for regulation in LM4050QCEM3-5.0/NOPB?
The LM4050QCEM3-5.0/NOPB requires a minimum cathode current of 74 μA at 25°C to maintain regulation. This increases to 90 μA across the full −40°C to +125°C extended temperature range, as specified in Section 5.8 of the TI datasheet SNOS455H.
How does the thermal hysteresis of LM4050QCEM3-5.0/NOPB affect precision systems?
The LM4050QCEM3-5.0/NOPB exhibits 1.4 mV thermal hysteresis after cycling between −40°C and +125°C. In high-accuracy applications like energy meters, this introduces a non-repeatable offset that must be accounted for during system-level calibration or mitigated via controlled thermal management.
Is LM4050QCEM3-5.0/NOPB pin-compatible with other LM4050 variants?
Yes - all LM4050xEM3 and LM4050xIM3 variants share identical SOT-23 (DBZ) pinout and package dimensions. The LM4050QCEM3-5.0/NOPB uses the same Cathode/Anode/NC pin assignment as LM4050AIM3-5.0 and LM4050BEM3-5.0, enabling drop-in replacement within the same voltage grade and temperature range.
LM4050QCEM3-5.0/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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 90 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QCEM3-5.0/NOPB FAQ
1.How can I place an order for LM4050QCEM3-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCEM3-5.0/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 LM4050QCEM3-5.0/NOPB reliable?
The price and inventory of LM4050QCEM3-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCEM3-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCEM3-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCEM3-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCEM3-5.0/NOPB?
LM4050QCEM3-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCEM3-5.0/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 LM4050QCEM3-5.0/NOPB?
For technical support, including LM4050QCEM3-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCEM3-5.0/NOPB requirements.
6.How does Aetrix verify that LM4050QCEM3-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCEM3-5.0/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 LM4050QCEM3-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCEM3-5.0/NOPB?
All LM4050QCEM3-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCEM3-5.0/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 LM4050QCEM3-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCEM3-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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