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Texas Instruments LM4050QBIM3X8.2/NOPB
- Part No.:
- LM4050QBIM3X8.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QBIM3X8.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,508
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Product details
Overview
LM4050QBIM3X8.2/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 8.192 V reverse breakdown voltage with ±0.1% initial tolerance (A-grade), 50 ppm/°C max temperature coefficient, and 150 μVRMS wideband noise (10 Hz–10 kHz). It operates from 74 μA to 15 mA, supports capacitive loads without external compensation, and targets high-accuracy analog signal chains in portable instrumentation.
For engineers reviewing the LM4050QBIM3X8.2/NOPB datasheet, LM4050QBIM3X8.2/NOPB pinout, LM4050QBIM3X8.2/NOPB application, or LM4050QBIM3X8.2/NOPB equivalent, key selection criteria include its 8.192 V output stability over −40°C to 125°C, no-output-capacitor operation, low dynamic impedance (0.6 Ω at 1 mA), thermal hysteresis of 2.3 mV, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4050QBIM3X8.2/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its reverse breakdown voltage is set during wafer sort via fuse and Zener-zap trimming to achieve ±0.1% accuracy at 25°C.
It functions as a two-terminal device requiring only an external current-limiting resistor, draws as little as 74 μA minimum operating current, tolerates unlimited capacitive loading, and maintains stability across 60 μA–15 mA operating range and −40°C to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.192 V nominal reverse breakdown voltage - sets precise bias/reference point for ADCs, DACs, and sensor signal conditioning |
| Initial Tolerance | ±0.1% at 25°C (A-grade) - enables single-point calibration in high-accuracy systems without trimming |
| Temp Coefficient | 50 ppm/°C max over −40°C to 125°C - ensures <±0.53 mV drift across full industrial+auto range |
| Min Operating Current | 74 μA (typical) at 25°C - allows ultra-low-power operation in battery-backed monitoring circuits |
| Dynamic Impedance | 0.6 Ω at 1 mA, 120 Hz - minimizes load-induced voltage variation in dynamic current-sink applications |
| Wideband Noise | 150 μVRMS, 10 Hz–10 kHz - limits added noise in precision 16-bit+ data acquisition front-ends |
| Thermal Hysteresis | 2.3 mV over −40°C ↔ 125°C cycle - ensures repeatable reference voltage after thermal cycling in automotive ECUs |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to supply rail via current-limiting resistor; voltage at this node is regulated to 8.192 V |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the 0 V reference for output voltage measurement |
| 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 | Enables space-constrained PCB layouts (e.g., wearables) without stability-compensation components |
| Tolerates capacitive loads | Supports direct connection to ADC input caps or long traces without oscillation risk |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures up to +125°C and lifetime reliability in ECU modules |
| Low 150 μVRMS noise | Preserves SNR in 16-bit SAR ADC references where noise floor must stay below 1 LSB |
| 50 ppm/°C tempco | Meets tight drift budgets in portable test equipment calibrated at single temperature point |
Applications
| Portable Instrumentation | Automotive Sensor Interface |
|---|---|
Use Scenario: Handheld multimeter with 200 kSPS sampling and auto-ranging analog front-end. IC Role / Device Role / Timing Role: Shunt reference for 16-bit delta-sigma ADC and programmable gain amplifier biasing. Use Value: 8.192 V output matches binary-full-scale scaling (213 = 8192), eliminating digital gain correction and reducing firmware complexity. |
Use Scenario: Engine coolant temperature sensor signal conditioning in Tier-1 powertrain control module. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric RTD-to-digital conversion under 125°C under-hood conditions. Use Value: AEC-Q100 Grade 1 rating and 2.3 mV thermal hysteresis ensure stable offset calibration across cold-start to hot-soak thermal cycles. |
| Energy Metering | Industrial Process Controller |
Use Scenario: DIN-rail mounted smart electricity meter with Class 0.2 accuracy requirement. IC Role / Device Role / Timing Role: Reference for metrology-grade 24-bit sigma-delta ADC measuring voltage and current channels. Use Value: ±0.1% initial tolerance and 120 ppm long-term stability (1000 hrs) reduce annual recalibration frequency and field maintenance cost. |
Use Scenario: PLC analog I/O module converting 4–20 mA loop signals to digital with isolated 16-bit resolution. IC Role / Device Role / Timing Role: Stable reference for isolated ADC and DAC in analog input/output sub-systems. Use Value: 0.6 Ω dynamic impedance and 74 μA min current enable accurate low-current sensing while maintaining immunity to supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C82IDBZR | Same 8.2 V nominal output, ±0.5% initial tolerance (C-grade), higher 100 ppm/°C tempco, 100 μVRMS noise | Lower-cost option for non-critical industrial controls where ±0.5% tolerance is acceptable | Select when budget constraints outweigh need for A-grade accuracy and automotive qualification |
| ADR3482ARJZ-R7 | 8.192 V output, ±0.1% tolerance, but series topology; requires 2.7–5.5 V supply, 125 μVRMS noise, no AEC-Q100 rating | Used in low-voltage systems (e.g., 3.3 V microcontroller domains) where shunt topology is incompatible with supply headroom | Choose only if supply voltage is <9 V and board layout permits series regulator footprint and bypass cap |
Compared with TL4050C82IDBZR and ADR3482ARJZ-R7, the LM4050QBIM3X8.2/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 8.192 V binary-aligned output, and shunt operation with no supply dependency - making it the sole choice for automotive and metrology designs requiring both precision and topology flexibility.
Availability
LM4050QBIM3X8.2/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor interfaces, energy metering, and industrial process controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QBIM3X8.2/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 for high-accuracy, low-power shunt reference applications in space-constrained and thermally demanding environments - particularly targeting portable test gear, automotive ECUs, and industrial data acquisition systems.
FAQ
What is the minimum operating current for LM4050QBIM3X8.2/NOPB at 25°C?
The LM4050QBIM3X8.2/NOPB has a typical minimum operating current of 74 μA at 25°C, with a maximum of 95 μA over the industrial temperature range (−40°C to 85°C) and 100 μA over the extended range (−40°C to 125°C). This low current enables use in battery-powered devices where quiescent power must be minimized. The LM4050QBIM3X8.2/NOPB remains functional down to this threshold while maintaining regulation within specified tolerance.
Does LM4050QBIM3X8.2/NOPB require an external output capacitor for stability?
No, the LM4050QBIM3X8.2/NOPB does not require an external output capacitor for stability. Its internal design eliminates the need for stabilization capacitance while remaining immune to oscillation with any capacitive load - a key advantage over older shunt references. This simplifies layout and reduces BOM count. The LM4050QBIM3X8.2/NOPB achieves this through optimized die-level compensation and low dynamic impedance (0.6 Ω).
Is LM4050QBIM3X8.2/NOPB qualified for automotive applications?
Yes, the LM4050QBIM3X8.2/NOPB is AEC-Q100 Grade 1 qualified, rated for operation from −40°C to +125°C ambient temperature, and manufactured on an automotive-grade flow. It meets stringent reliability, ESD (±2000 V HBM), and long-term stability requirements for engine control units, ADAS sensors, and body electronics. The LM4050QBIM3X8.2/NOPB is explicitly designated as the Q1 variant in TI's documentation.
What is the thermal hysteresis specification for LM4050QBIM3X8.2/NOPB?
The LM4050QBIM3X8.2/NOPB exhibits 2.3 mV thermal hysteresis over a −40°C to +125°C temperature cycle, defined as the voltage difference measured at 25°C after exposure to −40°C versus after exposure to +125°C. This low hysteresis ensures repeatable reference performance in automotive and industrial applications subject to repeated thermal cycling. The LM4050QBIM3X8.2/NOPB maintains this value across all grades and voltage options in the family.
Can LM4050QBIM3X8.2/NOPB be used with capacitive loads exceeding 1 µF?
Yes, the LM4050QBIM3X8.2/NOPB is explicitly characterized to tolerate unlimited capacitive loads - including ceramic, tantalum, and electrolytic types - without requiring series resistance or external compensation. This capability stems from its internal phase-margin optimization and low output impedance. Unlike many shunt references, the LM4050QBIM3X8.2/NOPB remains stable even when driving large ADC input capacitors or long PCB traces with significant parasitic capacitance.
LM4050QBIM3X8.2/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):
- 8.192V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 150µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 95 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QBIM3X8.2/NOPB FAQ
1.How can I place an order for LM4050QBIM3X8.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QBIM3X8.2/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 LM4050QBIM3X8.2/NOPB reliable?
The price and inventory of LM4050QBIM3X8.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QBIM3X8.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QBIM3X8.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QBIM3X8.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QBIM3X8.2/NOPB?
LM4050QBIM3X8.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QBIM3X8.2/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 LM4050QBIM3X8.2/NOPB?
For technical support, including LM4050QBIM3X8.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QBIM3X8.2/NOPB requirements.
6.How does Aetrix verify that LM4050QBIM3X8.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QBIM3X8.2/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 LM4050QBIM3X8.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QBIM3X8.2/NOPB?
All LM4050QBIM3X8.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QBIM3X8.2/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 LM4050QBIM3X8.2/NOPB part is unused and in its original packaging.
Return procedure for LM4050QBIM3X8.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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