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Texas Instruments LM4050QCIM3X2.0/NOPB
- Part No.:
- LM4050QCIM3X2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCIM3X2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,966
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Product details
Overview
LM4050QCIM3X2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 2.048 V reverse breakdown voltage with ±0.1% initial tolerance (A-grade), 50 ppm/°C max temperature coefficient, and 41 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA supply current and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050QCIM3X2.0/NOPB datasheet, LM4050QCIM3X2.0/NOPB pinout, LM4050QCIM3X2.0/NOPB application, or LM4050QCIM3X2.0/NOPB equivalent, key selection criteria include its no-output-capacitor-required stability, capacitive-load tolerance, sub-1 mV thermal hysteresis (0.7 mV), low dynamic impedance (0.3 Ω at 1 mA), and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4050QCIM3X2.0/NOPB implements a bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation and Zener-zap trim at wafer sort to achieve ±0.1% accuracy at 25°C. Its two-terminal configuration (cathode/anode) requires only an external series resistor for operation, eliminating need for output capacitors while maintaining stability across all capacitive loads.
It features fuse-trimmed reverse breakdown voltage, low 60 μA minimum operating current (for 2.048 V version), and robust ESD protection (±2000 V HBM). Thermal hysteresis is specified at 0.7 mV over −40°C to +125°C cycling, and long-term stability is 120 ppm after 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - enables precise 12-bit ADC full-scale calibration without scaling resistors. |
| Initial Tolerance | ±0.1% at 25°C (A-grade) - eliminates post-manufacturing trimming in production test fixtures. |
| Temp Coefficient | 50 ppm/°C max over −40°C to +125°C - ensures ≤±1.3 mV drift across full automotive range. |
| Min Operating Current | 60 μA - supports ultra-low-power battery monitoring circuits with microampere quiescent draw. |
| Noise (10 Hz–10 kHz) | 41 μVrms - maintains SNR > 95 dB in 16-bit data acquisition front-ends. |
| Dynamic Impedance | 0.3 Ω at 1 mA - minimizes load-induced voltage shift in varying-current sensor bias networks. |
| Thermal Hysteresis | 0.7 mV - guarantees repeatable voltage output after thermal cycling in engine control modules. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount. Pin 1 = Cathode (shunt current input), Pin 2 = Anode (ground reference), Pin 3 = NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input terminal | Accepts input current through external Rs; voltage develops across device when reverse-biased above 2.048 V. |
| Anode (Pin 2) | Ground reference node | Must be connected to system ground; defines 0 V reference for regulated output voltage. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or solder required - avoids unintended parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load up to 100 nF - simplifies layout and reduces BOM count in space-constrained designs. |
| Fixed 2.048 V output | Exact binary-scaled voltage (211 mV) - matches 12-bit DAC/ADC full-scale references without gain adjustment. |
| AEC-Q100 Grade 1 qualified | Rated for −40°C to +125°C operation with automotive reliability testing - suitable for powertrain and ADAS sensor biasing. |
| Low 60 μA minimum current | Enables operation from high-value current-setting resistors (>100 kΩ) - extends battery life in wireless sensor nodes. |
| 50 ppm/°C tempco | Guaranteed worst-case drift over full temperature range - replaces higher-cost buried-Zener references in cost-sensitive industrial meters. |
Applications
| Battery-Powered Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter measuring DC voltage with 0.1% accuracy requirement. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V reference for 12-bit SAR ADC and analog front-end op-amps. Use Value: Enables factory-calibrated accuracy without trim pots; 60 μA min current extends alkaline battery life to >12 months. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision voltage reference for 16-bit delta-sigma ADC reference buffer stage. Use Value: 41 μVrms noise and 0.7 mV thermal hysteresis ensure <0.01% measurement repeatability across ambient temperature swings. |
| Automotive Cabin Sensors | Precision Audio Biasing |
Use Scenario: Occupant detection system using thermistor-based cabin temperature sensing. IC Role / Device Role / Timing Role: Reference for ratiometric thermistor bridge measurement in HVAC control unit. Use Value: AEC-Q100 Grade 1 qualification and 50 ppm/°C tempco guarantee ±0.5°C accuracy over −40°C to +85°C vehicle operating range. |
Use Scenario: High-fidelity audio codec requiring low-noise analog supply for microphone preamplifier. IC Role / Device Role / Timing Role: Low-noise shunt reference generating clean 2.048 V bias for op-amp rail-splitting network. Use Value: 41 μVrms noise floor prevents audible hiss; SOT-23 footprint saves space on compact audio PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C20IDBZR | 2.048 V, ±0.5% initial tolerance (C-grade), 100 ppm/°C max tempco, 75 μA min current | Lower accuracy and higher drift - suitable for non-critical biasing where cost is primary constraint | Select when ±0.5% tolerance and relaxed tempco meet system requirements and budget limits. |
| REF3020AIDBZR | 2.048 V, ±0.2% initial tolerance, 50 ppm/°C max tempco, but series topology (3-pin), 50 μA IQ | Requires output capacitor; not drop-in compatible due to different topology and pinout | Choose for lower quiescent current and tighter tolerance than C-grade, but redesign PCB for series regulator layout. |
Compared with LM4040C20IDBZR, LM4050QCIM3X2.0/NOPB delivers 5× tighter initial tolerance and half the tempco, enabling higher-accuracy measurements; versus REF3020AIDBZR, it offers shunt simplicity and no output capacitor requirement but consumes slightly more quiescent current in low-IL conditions.
Availability
LM4050QCIM3X2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and precision data acquisition systems requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for LM4050QCIM3X2.0/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 decades of expertise in precision reference design and automotive-qualified components.
The LM4050-N product line was engineered for high-accuracy, low-power shunt reference applications in space-constrained and thermally demanding environments - particularly targeting portable test equipment, automotive sensors, and industrial process control.
FAQ
What is the minimum operating current for LM4050QCIM3X2.0/NOPB?
The LM4050QCIM3X2.0/NOPB requires a minimum operating current of 60 μA at 25°C to maintain regulation within specification. This value increases slightly over temperature - to 65 μA across the full industrial range (−40°C to +85°C) - and remains stable under capacitive loading, making LM4050QCIM3X2.0/NOPB suitable for ultra-low-power battery-backed systems.
Is LM4050QCIM3X2.0/NOPB AEC-Q100 qualified?
Yes, LM4050QCIM3X2.0/NOPB is AEC-Q100 Grade 1 qualified, meaning it is certified for operation from −40°C to +125°C and has undergone automotive reliability stress testing including HTOL, TC, and UHAST. This qualification is explicitly documented in the TI SNOS455G datasheet and applies to the "Q" suffix variant, confirming LM4050QCIM3X2.0/NOPB for use in engine control, ADAS, and body electronics.
Does LM4050QCIM3X2.0/NOPB require an output capacitor?
No, LM4050QCIM3X2.0/NOPB does not require an output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including values up to 100 nF. This eliminates the need for external bypass capacitors in most applications, reducing component count and board area - a key advantage over many competing shunt references that mandate minimum capacitance.
What is the thermal hysteresis specification for LM4050QCIM3X2.0/NOPB?
The thermal hysteresis of LM4050QCIM3X2.0/NOPB is specified at 0.7 mV maximum, measured as the voltage difference at 25°C after cycling between −40°C and +125°C. This low hysteresis ensures repeatable reference performance in automotive and industrial applications subject to repeated thermal cycling, directly supporting high-reliability measurement integrity in LM4050QCIM3X2.0/NOPB-based systems.
How does LM4050QCIM3X2.0/NOPB differ from the standard LM4050AIM3X-2.0?
LM4050QCIM3X2.0/NOPB is the automotive-grade (Q1) variant of the LM4050 family, whereas LM4050AIM3X-2.0 is the industrial-grade version. Both share identical electrical specs (2.048 V, ±0.1%, 50 ppm/°C), but LM4050QCIM3X2.0/NOPB undergoes additional AEC-Q100 stress testing, uses automotive-flow manufacturing, and is qualified for −40°C to +125°C operation - making LM4050QCIM3X2.0/NOPB the appropriate choice for automotive safety-critical subsystems.
LM4050QCIM3X2.0/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:
- Obsolete
- 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
LM4050QCIM3X2.0/NOPB FAQ
1.How can I place an order for LM4050QCIM3X2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCIM3X2.0/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 LM4050QCIM3X2.0/NOPB reliable?
The price and inventory of LM4050QCIM3X2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCIM3X2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCIM3X2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCIM3X2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCIM3X2.0/NOPB?
LM4050QCIM3X2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCIM3X2.0/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 LM4050QCIM3X2.0/NOPB?
For technical support, including LM4050QCIM3X2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCIM3X2.0/NOPB requirements.
6.How does Aetrix verify that LM4050QCIM3X2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCIM3X2.0/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 LM4050QCIM3X2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCIM3X2.0/NOPB?
All LM4050QCIM3X2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCIM3X2.0/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 LM4050QCIM3X2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCIM3X2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QCIM3X2.0/NOPB Tags
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