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Texas Instruments LM4050QCIM3X8.2/NOPB
- Part No.:
- LM4050QCIM3X8.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCIM3X8.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM4050QCIM3X8.2/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 8.192 V reverse breakdown voltage with ±0.1% (A-grade) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 150 μVrms wideband noise (10 Hz–10 kHz). It operates from 74 μA to 15 mA over −40°C to 125°C and requires no output capacitor-enabling stable regulation in battery-powered data-acquisition and automotive sensor signal conditioning.
For engineers reviewing the LM4050QCIM3X8.2/NOPB datasheet, LM4050QCIM3X8.2/NOPB pinout, LM4050QCIM3X8.2/NOPB application, or LM4050QCIM3X8.2/NOPB equivalent, key selection criteria include its fixed 8.192 V output for 12-bit ADC/DAC LSB alignment, micropower operation down to 74 μA, AEC-Q100 Grade 1 qualification, and SOT-23 thermal performance (RθJA = 287°C/W).
Technical Context
The LM4050QCIM3X8.2/NOPB implements a curvature-corrected bandgap shunt reference architecture with Zener-zap trim at wafer sort, achieving ±0.1% accuracy at 25°C and maintaining stability across 74 μA–15 mA cathode current. Its internal compensation eliminates external capacitor requirements while tolerating arbitrary capacitive loads.
It features a parasitic Schottky diode between Anode (Pin 2) and NC (Pin 3), mandating Pin 3 be left floating or tied to Pin 2-especially in high-EMI environments. Thermal hysteresis is specified at 2.3 mV over −40°C to 125°C cycling, reflecting mechanical stress-induced voltage shift in the SOT-23 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.192 V nominal reverse breakdown voltage-enables exact 2 mV/LSB scaling for 12-bit converters operating from ≥10 V supplies. |
| Initial Tolerance | ±0.1% at 25°C (A-grade)-guarantees ≤±8.2 mV absolute error before temperature or aging effects. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C-limits worst-case drift to ±410 μV/°C across full range. |
| Operating Current | 74 μA min / 15 mA max-supports ultra-low-power sensing nodes and robust regulation under dynamic load. |
| Wideband Noise | 150 μVrms (10 Hz–10 kHz)-meets precision measurement SNR requirements without additional filtering. |
| Dynamic Impedance | 0.6 Ω at 1 mA / 120 Hz-ensures minimal load-regulation error (<1 mV) for currents up to 1 mA. |
| Long-Term Stability | 120 ppm after 1000 hrs-predicts <0.1% output shift over first year of continuous operation. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, rated for −40°C to 125°C extended industrial operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input & voltage reference node | Connects to series resistor (RS) and load; carries total cathode current (IQ + IL); defines regulated VOUT relative to Anode. |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; serves as voltage reference point for cathode; ties to NC pin per EMI mitigation guidance. |
| NC (Pin 3) | No internal connection | Die attach interface contact with parasitic Schottky to Anode; must float or connect to Pin 2-never drive or bias externally. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 8.192 V output | Eliminates external feedback resistors and matching errors-directly supports 12-bit converter full-scale scaling with 2 mV/LSB resolution. |
| No output capacitor required | Internally compensated design ensures stability with zero or arbitrary capacitive loading-reduces BOM count and layout sensitivity. |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications with operation from −40°C to 125°C ambient and robust ESD performance (±2 kV HBM). |
| Micropower operation | 74 μA minimum cathode current enables use in energy-harvesting and coin-cell-powered systems without sacrificing accuracy. |
| Low thermal hysteresis | 2.3 mV max shift after −40°C ↔ 125°C cycling-minimizes calibration rework in field-deployed instrumentation and metering equipment. |
Applications
| Battery-Powered Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Portable multimeter or handheld environmental monitor acquiring analog sensor signals on single Li-ion cell (3.0–4.2 V). IC Role / Device Role / Timing Role: Shunt reference providing stable 8.192 V reference for SAR ADC-enabling 2 mV/LSB resolution with 12-bit effective dynamic range. Use Value: Micropower operation extends battery life; no output cap simplifies PCB layout; A-grade tolerance ensures factory calibration validity over product lifetime. |
Use Scenario: Engine control unit measuring exhaust gas oxygen (EGO) sensor output under wide ambient temperature swings. IC Role / Device Role / Timing Role: Precision reference for op-amp signal conditioning stage-establishing accurate gain and offset in analog front-end prior to ADC sampling. Use Value: AEC-Q100 Grade 1 rating guarantees operation at 125°C ambient; low tempco maintains <±1 LSB error across −40°C to 125°C; thermal hysteresis <2.3 mV prevents calibration drift after thermal cycling. |
| Industrial Process Control Transmitter | Precision Energy Metering |
|
Use Scenario: 4–20 mA loop-powered pressure transmitter with local display and diagnostics. IC Role / Device Role / Timing Role: Reference for DAC generating precise 4 mA and 20 mA setpoints-ensuring compliance with IEC 61000-4-4 surge immunity test levels. Use Value: Stable 8.192 V output enables direct 12-bit DAC code-to-current mapping; SOT-23 footprint saves space in compact transmitter housing; 15 mA max current supports active output stage headroom. |
Use Scenario: Class 0.2 polyphase electricity meter requiring metrology-grade voltage reference for ADC sampling of mains voltage waveform. IC Role / Device Role / Timing Role: Primary shunt reference for isolated sigma-delta ADC-providing stable scale factor independent of supply rail variation or temperature drift. Use Value: 50 ppm/°C max tempco contributes <±0.06% error over meter operating range; 120 ppm long-term stability meets 10-year metrology certification requirements; low noise avoids SNR degradation in high-resolution sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5082IDR | 8.2 V series reference (not shunt); 3 ppm/°C tempco; 10 μVrms noise; requires input/output caps; SOIC-8 package. | Higher accuracy and lower noise-but needs external capacitors, larger footprint, and higher quiescent current (≈1 mA). | Select REF5082IDR only when sub-ppm/°C drift and ultra-low noise are mandatory; avoid if board space or micropower (<100 μA) is critical. |
| ADR4580BRZ | 8.0 V series reference; 3 ppm/°C tempco; 1.8 μVp-p (0.1–10 Hz); SOIC-8; 1.2 mA quiescent current; requires bypass caps. | Superior low-frequency noise and drift-but incompatible topology (series vs. shunt), larger size, and 16× higher current draw. | Choose ADR4580BRZ for lab-grade instrumentation where power is unconstrained and lowest possible 1/f noise is required; not suitable for battery or space-constrained designs. |
Compared with REF5082IDR and ADR4580BRZ, LM4050QCIM3X8.2/NOPB offers unique value in shunt topology, SOT-23 footprint, and micropower operation-making it irreplaceable in loop-powered transmitters, portable meters, and automotive modules where board area and standby current are design-critical constraints.
Availability
LM4050QCIM3X8.2/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, and industrial process transmitters requiring stable component supply with guaranteed long-term manufacturability and AEC-Q100 compliance.
Supply support for LM4050QCIM3X8.2/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, embedded processing, and connectivity technologies, with decades of leadership in precision analog ICs and automotive-qualified components.
The LM4050-N series was designed specifically for space-constrained, high-accuracy shunt reference applications-including automotive sensors, portable test equipment, and energy metering-where micropower operation, AEC-Q100 compliance, and fixed-voltage simplicity are essential.
FAQ
What is the minimum operating current for LM4050QCIM3X8.2/NOPB?
The LM4050QCIM3X8.2/NOPB requires a minimum cathode current of 74 μA at 25°C and 95 μA across the full −40°C to 125°C temperature range to maintain regulation within specifications. This value is higher than lower-voltage variants (e.g., 60 μA for 2.048 V) due to increased Zener impedance at 8.192 V. Operating below this threshold risks loss of accuracy and instability.
Is LM4050QCIM3X8.2/NOPB AEC-Q100 qualified?
Yes, LM4050QCIM3X8.2/NOPB is explicitly designated as an LM4050-N-Q1 device and is AEC-Q100 Grade 1 qualified, meaning it is certified for automotive applications with guaranteed operation from −40°C to 125°C ambient temperature and validated reliability under automotive stress conditions including HTOL, temperature cycling, and ESD.
Can LM4050QCIM3X8.2/NOPB be used without an output capacitor?
Yes, LM4050QCIM3X8.2/NOPB is internally compensated and does not require an output capacitor for stability-even with purely capacitive loads. This is a core feature confirmed in TI's datasheet Section 3 and Figure 8-1. Adding a bypass capacitor is optional and will not degrade performance.
What is the purpose of Pin 3 (NC) on LM4050QCIM3X8.2/NOPB?
Pin 3 is a no-connect terminal tied to the die attach pad; it forms a parasitic Schottky diode to Pin 2 (Anode). Per TI's guidance in Section 4, Pin 3 must either be left floating or connected directly to Pin 2-especially in high-EMI environments-to prevent unintended conduction paths and ensure predictable thermal behavior.
How does the 8.192 V output of LM4050QCIM3X8.2/NOPB benefit ADC/DAC systems?
The 8.192 V output of LM4050QCIM3X8.2/NOPB provides exactly 2 mV per LSB for 12-bit converters (8192 ÷ 4096 = 2), enabling direct full-scale utilization without software scaling or hardware gain adjustment-critical for metrology-grade energy meters and precision data loggers where LSB-level accuracy is mandated.
LM4050QCIM3X8.2/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:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 8.192V
- 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:
- 95 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QCIM3X8.2/NOPB FAQ
1.How can I place an order for LM4050QCIM3X8.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCIM3X8.2/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 LM4050QCIM3X8.2/NOPB reliable?
The price and inventory of LM4050QCIM3X8.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCIM3X8.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCIM3X8.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCIM3X8.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCIM3X8.2/NOPB?
LM4050QCIM3X8.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCIM3X8.2/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 LM4050QCIM3X8.2/NOPB?
For technical support, including LM4050QCIM3X8.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCIM3X8.2/NOPB requirements.
6.How does Aetrix verify that LM4050QCIM3X8.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCIM3X8.2/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 LM4050QCIM3X8.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCIM3X8.2/NOPB?
All LM4050QCIM3X8.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCIM3X8.2/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 LM4050QCIM3X8.2/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCIM3X8.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QCIM3X8.2/NOPB Tags
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