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Texas Instruments LM4050QCIM3X4.1/NOPB
- Part No.:
- LM4050QCIM3X4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCIM3X4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,002
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Product details
Overview
LM4050QCIM3X4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 4.096 V reverse breakdown voltage with ±0.1% initial tolerance (A-grade), 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 73 μA to 15 mA over −40°C to 125°C, enabling high-accuracy ADC/DAC biasing in space-constrained industrial and automotive systems.
For engineers reviewing the LM4050QCIM3X4.1/NOPB datasheet, LM4050QCIM3X4.1/NOPB pinout, LM4050QCIM3X4.1/NOPB application, or LM4050QCIM3X4.1/NOPB equivalent, this device serves as a stable, capacitor-tolerant 4.096 V reference for portable instrumentation, battery-powered data acquisition, and precision analog signal chains where low quiescent current and thermal stability are critical.
Technical Context
The LM4050QCIM3X4.1/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, ensuring monotonic voltage vs. temperature behavior across its full operating range. Its dynamic impedance remains ≤0.5 Ω at 1 mA, supporting fast load transients without external capacitance.
It functions as a two-terminal shunt regulator: cathode accepts input current and sets output voltage via reverse breakdown, while anode connects to system ground. The NC pin (Pin 3) is unconnected and must be left floating or tied to Pin 2 per TI specification - no internal circuitry links it to regulation function.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal; enables exact 12-bit full-scale scaling (e.g., 4.096 V / 4096 = 1 mV/LSB) in SAR ADCs |
| Initial Tolerance | ±0.1% at 25°C (A-grade); eliminates post-manufacturing calibration in high-volume test equipment |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C; contributes ≤±2.6 mV drift across full range, critical for process control sensors |
| Operating Current | 73 μA min to 15 mA max; supports ultra-low-power sleep modes and high-current DAC reference buffering |
| Noise (10 Hz–10 kHz) | 93 μVrms; limits quantization uncertainty to <0.023 LSB in 16-bit systems referenced to 4.096 V |
| Dynamic Impedance | 0.5 Ω at 1 mA; maintains <0.5 mV output shift under 1 mA load step, suitable for dynamic analog front-ends |
| Long-Term Stability | 120 ppm over 1000 hrs; ensures <±0.5 mV drift in 10-year deployed instrumentation |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input & voltage reference node | Connects to regulated voltage rail; sinks all load + reference current; defines 4.096 V at this node relative to Anode |
| Anode (Pin 2) | Reference ground return | Must connect directly to system ground plane; forms low-impedance return path for shunt current and minimizes ground bounce error |
| NC (Pin 3) | No internal connection | Must remain floating or be shorted to Pin 2 per TI datasheet; no routing or PCB trace required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load up to 10 μF, eliminating BOM cost and layout area for decoupling caps |
| Tolerates capacitive loads | Guaranteed phase margin >45° with 0–10 μF output capacitance, enabling direct drive of ADC sample capacitors |
| Fixed 4.096 V output | Matches binary-weighted full-scale ranges (e.g., 212 × 1 mV), simplifying digital-to-analog scaling in firmware |
| Industrial & extended temp range | Specified from −40°C to +125°C; qualified for under-hood automotive and factory-floor industrial environments |
| Low 73 μA minimum current | Enables operation from high-value bias resistors (e.g., 56 kΩ from 5 V), reducing power in always-on sensor nodes |
Applications
| Portable Data Loggers | Automotive Battery Monitoring |
|---|---|
Use Scenario: Continuous 16-bit voltage sampling of Li-ion cell stacks in handheld diagnostic tools. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.096 V reference for SAR ADC conversion. Use Value: 93 μVrms noise and 50 ppm/°C TC ensure <±0.01% measurement accuracy across 0–40°C ambient, meeting IEC 62368-1 portable equipment requirements. |
Use Scenario: Real-time monitoring of 12 V lead-acid battery health in engine control units. IC Role / Device Role / Timing Role: Precision reference for microcontroller ADC measuring battery voltage and alternator output. Use Value: AEC-Q100 Grade 1 qualification and −40°C to +125°C operation guarantee reliability during cold cranking and under-hood thermal cycling. |
| Industrial Process Transmitters | Calibration Equipment |
Use Scenario: 4–20 mA loop-powered pressure transmitter with local digital display. IC Role / Device Role / Timing Role: Reference source for both analog output DAC and internal ADC used for self-diagnostics. Use Value: 120 ppm long-term stability and 0.5 Ω dynamic impedance maintain <±0.05% span accuracy over 5-year field deployment without recalibration. |
Use Scenario: Benchtop multimeter reference subsystem requiring traceable 4.096 V output. IC Role / Device Role / Timing Role: Primary voltage standard in metrology-grade calibration chain, buffered by low-drift op-amps. Use Value: ±0.1% initial tolerance and thermal hysteresis <1.148 mV enable sub-10 ppm absolute accuracy after single-point lab calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF43FHQDBVRQ1 | Series reference (not shunt); 4.096 V output; 2 ppm/°C TC; requires input voltage ≥4.5 V | Needs dedicated supply rail; unsuitable for simple resistor-biased shunt topologies | Select when ultra-low drift (<2 ppm/°C) and supply headroom exist; avoid if using single 5 V rail with high-impedance bias |
| ADR3440ARJZ-R7 | Shunt reference; 4.096 V; ±0.1% tolerance; 30 ppm/°C TC; SOT-23 package; 60 μA min current | Lower min current enables higher bias resistance; tighter TC improves wide-temp accuracy | Prefer for new designs needing best-in-class TC; verify compatibility with existing 73 μA min-current design margins |
Compared with REF43FHQDBVRQ1 and ADR3440ARJZ-R7, the LM4050QCIM3X4.1/NOPB offers proven shunt topology simplicity and robustness in resistor-fed configurations, while trading 20 ppm/°C higher TC for broader supply flexibility and lower cost in high-volume industrial deployments.
Availability
LM4050QCIM3X4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive battery management, and industrial process transmitters requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050QCIM3X4.1/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.
The LM4050-N series was engineered for space-constrained, high-accuracy analog systems demanding micropower operation and capacitor-free stability - targeting data acquisition, portable test gear, and automotive sensing applications.
FAQ
What is the minimum operating current for LM4050QCIM3X4.1/NOPB?
The LM4050QCIM3X4.1/NOPB requires a minimum operating current of 73 μA over the industrial temperature range (−40°C to 85°C) and 78 μA over the extended range (−40°C to 125°C), as specified in Section 6.7 of the TI datasheet SNOS455G. This value ensures stable 4.096 V regulation and must be supplied through an external bias resistor or current source. Operating below this threshold risks output voltage collapse or increased noise in the LM4050QCIM3X4.1/NOPB.
Is LM4050QCIM3X4.1/NOPB AEC-Q100 qualified?
No, the LM4050QCIM3X4.1/NOPB is not AEC-Q100 qualified. It belongs to the LM4050-N industrial-grade family. For automotive applications, TI offers the pin-compatible LM4050-Q1 variant (e.g., LM4050QAIM3X4.1/NOPB), which is AEC-Q100 Grade 1 qualified and specified for −40°C to +125°C operation. The LM4050QCIM3X4.1/NOPB lacks the automotive flow validation and stress testing required for AEC-Q100 compliance.
Can LM4050QCIM3X4.1/NOPB drive capacitive loads without oscillation?
Yes, the LM4050QCIM3X4.1/NOPB is explicitly designed to tolerate capacitive loads up to 10 μF without requiring an external series resistor or output capacitor for stability. Its internal architecture provides guaranteed phase margin across the full capacitance range, making it suitable for direct connection to ADC sample-and-hold capacitors or filtering networks. This capability is confirmed in the "No Output Capacitor Required" and "Tolerates Capacitive Loads" features of the LM4050QCIM3X4.1/NOPB datasheet.
What is the thermal hysteresis specification for LM4050QCIM3X4.1/NOPB?
The LM4050QCIM3X4.1/NOPB exhibits a maximum thermal hysteresis of 1.148 mV, defined as the voltage difference measured at 25°C after cycling to −40°C versus after cycling to +125°C. This parameter reflects mechanical stress memory in the silicon die and directly impacts repeatability in systems undergoing repeated thermal cycles. The value is documented in Section 6.7 (Electrical Characteristics: 4.1-V Option) of the TI SNOS455G datasheet for the LM4050QCIM3X4.1/NOPB.
Does LM4050QCIM3X4.1/NOPB require a heatsink in typical operation?
No, the LM4050QCIM3X4.1/NOPB does not require a heatsink under normal operating conditions. With a maximum power dissipation of 280 mW at 25°C ambient and a junction-to-ambient thermal resistance (RθJA) of 287°C/W in the SOT-23 package, even at 15 mA load and 5 V input (75 mW dissipation), junction temperature rise is only ~21°C - well within the 150°C absolute maximum. Board-level copper pour is sufficient for thermal management in the LM4050QCIM3X4.1/NOPB.
LM4050QCIM3X4.1/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):
- 4.096V
- 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:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QCIM3X4.1/NOPB FAQ
1.How can I place an order for LM4050QCIM3X4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCIM3X4.1/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 LM4050QCIM3X4.1/NOPB reliable?
The price and inventory of LM4050QCIM3X4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCIM3X4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCIM3X4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCIM3X4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCIM3X4.1/NOPB?
LM4050QCIM3X4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCIM3X4.1/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 LM4050QCIM3X4.1/NOPB?
For technical support, including LM4050QCIM3X4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCIM3X4.1/NOPB requirements.
6.How does Aetrix verify that LM4050QCIM3X4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCIM3X4.1/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 LM4050QCIM3X4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCIM3X4.1/NOPB?
All LM4050QCIM3X4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCIM3X4.1/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 LM4050QCIM3X4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCIM3X4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QCIM3X4.1/NOPB Tags
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