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Texas Instruments LM4050QCIM3-2.0/NOPB
- Part No.:
- LM4050QCIM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCIM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:858
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Product details
Overview
LM4050QCIM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V ±0.1% (A-grade) output at 25°C, with 50 ppm/°C max temperature coefficient, 41 μVrms wideband noise (10 Hz–10 kHz), and stable operation from 60 μA to 15 mA cathode current. It enables high-accuracy ADC/DAC biasing in space-constrained battery-powered instrumentation.
For engineers reviewing the LM4050QCIM3-2.0/NOPB datasheet, LM4050QCIM3-2.0/NOPB pinout, LM4050QCIM3-2.0/NOPB application, or LM4050QCIM3-2.0/NOPB equivalent, key selection criteria include initial voltage tolerance, low-noise performance, thermal hysteresis (0.7 mV), extended temperature range support (−40°C to 125°C), and compatibility with capacitive loads without external stabilization.
Technical Context
The LM4050QCIM3-2.0/NOPB implements a curvature-corrected bandgap architecture with Zener-zap trim for ±0.1% initial accuracy. Its internal compensation eliminates need for output capacitance while maintaining stability across 60 μA–15 mA operating current and any capacitive load.
It functions as a two-terminal shunt regulator: cathode regulates against anode (ground), requiring only an external series resistor (RS) to set cathode current. The NC pin (Pin 3) must be left floating or tied to anode to avoid EMI-induced errors in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables exact 1 LSB scaling for 11-bit systems referenced to 2 V full-scale |
| Initial Tolerance (A Grade) | ±0.1% at 25°C; corresponds to ±2.048 mV absolute error, critical for calibration-grade signal chains |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C; ensures <±1.05 mV drift across full industrial+extended range |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz); supports 16-bit+ resolution in low-frequency precision measurement |
| Min Operating Current | 60 μA typical at 25°C; allows ultra-low-power operation in energy-harvesting or coin-cell systems |
| Dynamic Impedance | 0.3 Ω at 1 mA / 120 Hz; provides tight load regulation and fast transient response in shunt configurations |
| Thermal Hysteresis | 0.7 mV over −40°C ↔ 125°C cycle; limits repeatability error in systems undergoing repeated thermal cycling |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed die attach pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage node | Connects to supply via RS; output voltage appears between Cathode and Anode; carries total current (IQ + IL) |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; serves as voltage reference point for all measurements and feedback |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 (Anode); prevents EMI coupling in high-noise environments per TI layout guidance |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for stability with any capacitive load - eliminates BOM item and layout area in compact designs |
| Fixed 2.048 V breakdown | Matches binary-weighted 11-bit full-scale (211 = 2048); enables direct LSB = 1 mV mapping without scaling resistors |
| AEC-Q100 Grade 1 qualified | Qualified for automotive applications up to 125°C junction temperature; supports under-hood and ADAS sensor modules |
| Tolerates capacitive loads | Stable with >100 nF bypass or ADC input capacitance - avoids oscillation in data acquisition front-ends |
| Low 41 μVrms noise | Enables effective resolution beyond 16 bits in DC-coupled precision measurement paths |
Applications
| Battery-Powered Instrumentation | Data-Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter or handheld sensor logger powered by single Li-ion cell (2.7–4.2 V). IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V for 12-bit SAR ADC and microcontroller VREF. Use Value: Enables 1 mV resolution without trimming; 60 μA min current extends runtime in sleep mode. | Use Scenario: Industrial PLC analog input module digitizing 4–20 mA loop signals. IC Role / Device Role / Timing Role: Precision reference for 16-bit delta-sigma ADC driving isolated SPI interface. Use Value: 41 μVrms noise and 50 ppm/°C TC ensure <±0.01% gain error across operating temperature range. |
| Automotive Sensor Conditioning | Precision Audio Biasing |
Use Scenario: Tire pressure monitoring system (TPMS) ECU measuring piezoresistive bridge output. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 shunt reference supplying excitation and ADC reference for ratiometric bridge readout. Use Value: Qualified for −40°C to 125°C ambient; thermal hysteresis ≤0.7 mV preserves calibration integrity after thermal cycling. | Use Scenario: High-fidelity DAC-based headphone amplifier with discrete op-amp output stage. IC Role / Device Role / Timing Role: Low-noise 2.048 V reference for DAC VREF and op-amp bias network. Use Value: 41 μVrms noise floor prevents audible hiss; no-output-capacitor design simplifies PCB routing near sensitive analog sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C20IDBZR | Same 2.048 V output, ±0.5% initial tolerance (C grade), 100 ppm/°C max TC, 60 μA min current | Lower accuracy and higher drift; suitable for cost-sensitive non-calibration applications | Select when ±0.5% tolerance and relaxed TC meet system requirements and budget constraints |
| ADR3420ARJZ-R7 | 2.048 V output, ±0.1% tolerance, but series (not shunt) topology; requires 100 μA supply current; 3.5 μVrms noise | Cannot replace shunt configuration directly; needs different biasing and lacks cathode/anode flexibility | Choose only if redesigning to series topology is acceptable and ultra-low noise is prioritized over layout simplicity |
Compared with TL4050C20IDBZR and ADR3420ARJZ-R7, LM4050QCIM3-2.0/NOPB uniquely combines A-grade accuracy, shunt topology flexibility, SOT-23 footprint, and automotive qualification - making it optimal for space-constrained, high-reliability measurement nodes where pin-compatible alternatives do not exist.
Availability
LM4050QCIM3-2.0/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial data-acquisition systems, and automotive sensor conditioning requiring stable component supply and long-term calibration integrity.
Supply support for LM4050QCIM3-2.0/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, embedded processing, and connectivity technologies, with decades of leadership in precision analog ICs.
The LM4050-N product line delivers micropower shunt references for space-constrained, high-accuracy applications including portable test equipment, automotive sensors, and industrial process control - emphasizing low drift, low noise, and robust thermal performance.
FAQ
What is the maximum operating current for LM4050QCIM3-2.0/NOPB?
The LM4050QCIM3-2.0/NOPB supports a maximum cathode current of 15 mA. Exceeding this limit risks exceeding the device's 280 mW power dissipation rating at 25°C ambient, potentially causing thermal shutdown or accelerated aging. Derating is required above 25°C using RθJA = 287°C/W.
Does LM4050QCIM3-2.0/NOPB require an external output capacitor?
No, LM4050QCIM3-2.0/NOPB is internally compensated and remains stable without an external output capacitor. It tolerates any capacitive load, including ADC input capacitance or ceramic bypass caps. Adding a capacitor is optional and does not affect stability - unlike many older shunt references.
What is the purpose of Pin 3 (NC) on LM4050QCIM3-2.0/NOPB?
Pin 3 is a no-connect terminal with no internal bond wire. Per TI's layout guidance, it must be left floating or tied to Pin 2 (Anode) - especially in high-EMI environments (e.g., near transformers or switching regulators) - to prevent noise coupling into the reference node via parasitic capacitance.
Is LM4050QCIM3-2.0/NOPB suitable for automotive applications?
Yes, LM4050QCIM3-2.0/NOPB is the Q1 variant (LM4050-Q1 family) and is AEC-Q100 Grade 1 qualified for operation from −40°C to +125°C ambient. It is manufactured on an automotive-grade flow and specified for use in engine control, ADAS, and body electronics where reliability and temperature robustness are mandatory.
How does the 2.048 V output of LM4050QCIM3-2.0/NOPB benefit ADC interfacing?
The 2.048 V output of LM4050QCIM3-2.0/NOPB aligns precisely with binary scaling: 2.048 V / 2048 = 1 mV per LSB for 11-bit systems, and enables clean 12-bit (4096 steps) mapping when used with gain-of-2 amplifiers. This eliminates software or hardware scaling, reducing gain error and simplifying calibration in precision measurement.
LM4050QCIM3-2.0/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):
- 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
LM4050QCIM3-2.0/NOPB FAQ
1.How can I place an order for LM4050QCIM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCIM3-2.0/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 LM4050QCIM3-2.0/NOPB reliable?
The price and inventory of LM4050QCIM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCIM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCIM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCIM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCIM3-2.0/NOPB?
LM4050QCIM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCIM3-2.0/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 LM4050QCIM3-2.0/NOPB?
For technical support, including LM4050QCIM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCIM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050QCIM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCIM3-2.0/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 LM4050QCIM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCIM3-2.0/NOPB?
All LM4050QCIM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCIM3-2.0/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 LM4050QCIM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCIM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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