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Texas Instruments LM4050QCIM3-4.1/NOPB
- Part No.:
- LM4050QCIM3-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCIM3-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:645
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Product details
Overview
LM4050QCIM3-4.1/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% (A-grade) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 68 μA to 15 mA over −40°C to 125°C and requires no output capacitor-enabling stable regulation in battery-powered data-acquisition systems and 12-bit ADC references.
For engineers reviewing the LM4050QCIM3-4.1/NOPB datasheet, LM4050QCIM3-4.1/NOPB pinout, LM4050QCIM3-4.1/NOPB application, or LM4050QCIM3-4.1/NOPB equivalent, key selection criteria include its 4.096 V output matching 1 mV LSB for 5 V–supplied 12-bit converters, micropower operation down to 68 μA, AEC-Q100 Grade 1 qualification (Q1 suffix), thermal hysteresis of 1.148 mV, and SOT-23 pin-compatible compatibility across LM4050-N family variants.
Technical Context
The LM4050QCIM3-4.1/NOPB implements a curvature-corrected bandgap shunt reference architecture with Zener-zap trim at wafer sort, achieving ±0.1% accuracy without external feedback. Its internal compensation eliminates need for output capacitance while maintaining stability with any capacitive load.
It functions as a two-terminal device: cathode regulates voltage against anode (ground), with current-sourced operation requiring external series resistor (RS). Minimum operating current is 68 μA (typical) at 25°C and 78 μA over extended temperature range (−40°C to 125°C), and dynamic impedance is 0.5 Ω at 1 mA/120 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal - enables exact 1 mV LSB for 5 V–supplied 12-bit ADCs/DACs |
| Initial Tolerance (A grade) | ±0.1% at 25°C - ±4.1 mV absolute error, verified via fuse/Zener-zap trim |
| Temp Coefficient | ≤50 ppm/°C - ≤±211 μV drift over −40°C to 125°C span |
| Operating Current Range | 68 μA to 15 mA - supports ultra-low-power sensor nodes and high-current precision buffers |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz) - suitable for 16-bit SAR ADC reference without additional filtering |
| Thermal Hysteresis | 1.148 mV - voltage shift after cycling −40°C → 25°C → 125°C → 25°C |
| Dynamic Impedance | 0.5 Ω at 1 mA/120 Hz - ensures minimal load-induced voltage droop in varying current conditions |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed die attach pad not internally connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage node | Connects to supply rail via series resistor RS; voltage referenced to 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 VOUT = VCATHODE − VANODE |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 (Anode); avoids EMI coupling in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for stability with any capacitive load - reduces BOM count and layout area |
| Fixed 4.096 V output | Matches standard 12-bit full-scale resolution (5 V / 4096 = 1 mV/LSB) - eliminates trimming resistors |
| AEC-Q100 Grade 1 qualified | Rated for automotive ambient temperatures up to 125°C - validated for engine control, ADAS sensors |
| Low micropower start-up | 68 μA minimum operating current - enables use in coin-cell–powered IoT endpoints and energy harvesters |
| Stable with capacitive loads | Robust phase margin across 0–10 μF - supports direct decoupling of ADC reference inputs |
Applications
| Portable Data Loggers | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-operated environmental monitoring node sampling temperature, humidity, and pressure at 1 Hz using a 12-bit SAR ADC. IC Role / Device Role / Timing Role: Precision 4.096 V shunt reference providing stable VREF for ADC conversion, directly tied to ADC REF+ pin. Use Value: Enables true 1 mV LSB resolution without calibration; 93 μVrms noise contributes <0.1 LSB RMS error; 68 μA quiescent current extends 10-year coin-cell life. | Use Scenario: Front-end signal conditioning for MEMS-based tire pressure sensor in powertrain domain, operating at 125°C ambient. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 shunt reference supplying excitation and reference voltage to bridge amplifier and 16-bit delta-sigma ADC. Use Value: Maintains ±0.1% accuracy over full automotive temperature range; 50 ppm/°C TC ensures <±211 μV drift; thermal hysteresis limited to 1.148 mV prevents calibration drift after thermal cycling. |
| Industrial Process Transmitters | Medical Patient Monitoring Devices |
Use Scenario: 4–20 mA loop-powered field transmitter converting RTD resistance to analog output, with local display and diagnostics. IC Role / Device Role / Timing Role: Primary voltage reference for both DAC (output generation) and ADC (sensor readback), sharing single 4.096 V source. Use Value: Eliminates dual-reference mismatch error; 0.5 Ω dynamic impedance ensures <1 μV droop during 10 mA DAC load transients; no capacitor needed simplifies conformal coating reliability. | Use Scenario: Portable ECG module acquiring biopotential signals with 24-bit delta-sigma ADC, powered by rechargeable Li-ion battery. IC Role / Device Role / Timing Role: Low-noise, low-drift shunt reference for ADC reference buffer and analog front-end gain calibration. Use Value: 93 μVrms noise floor supports >100 dB SNR; long-term stability of 120 ppm/1000 hrs minimizes recalibration frequency; SOT-23 footprint saves space in compact wearable enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3-4.1/NOPB | Higher initial tolerance (±0.5%), higher tempco (100 ppm/°C), 120 μVrms noise, non-AEC-Q100 | Cost-sensitive industrial instrumentation where ±0.5% accuracy suffices | Select when budget constraints outweigh precision requirements and automotive qualification is unnecessary |
| MAX6008AEUR+T | 4.096 V output, ±0.2% initial tolerance, 75 ppm/°C tempco, 60 μVrms noise, SOT-23-3, non-automotive | High-precision medical or test equipment needing lower noise than LM4050QCIM3-4.1/NOPB | Choose when sub-70 μVrms noise is mandatory and AEC-Q100 is not required |
Compared with LM4040CIM3-4.1/NOPB, LM4050QCIM3-4.1/NOPB delivers 5× tighter initial tolerance and half the temperature coefficient; versus MAX6008AEUR+T, it adds AEC-Q100 Grade 1 qualification and wider operating current range but trades 33 μVrms noise performance for automotive robustness.
Availability
LM4050QCIM3-4.1/NOPB is available at Aetrix Electronics and suitable for portable data loggers, automotive sensor signal conditioning, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050QCIM3-4.1/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-grade components.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy applications including battery-powered instrumentation, automotive sensors, and industrial control systems-designed for zero-output-capacitor operation and AEC-Q100 compliance.
FAQ
What is the minimum operating current for LM4050QCIM3-4.1/NOPB at 25°C?
The LM4050QCIM3-4.1/NOPB has a typical minimum operating current of 68 μA at 25°C, with a maximum of 78 μA across the extended temperature range (−40°C to 125°C). This value ensures stable regulation and is specified in Section 5.7 of the TI datasheet under "IRMIN". Operating below this current may cause loss of regulation or increased output voltage drift.
Does LM4050QCIM3-4.1/NOPB require an external output capacitor?
No, LM4050QCIM3-4.1/NOPB does not require an external output capacitor due to internal compensation. It remains stable with any capacitive load-including direct connection to ADC reference inputs-eliminating board space and cost. A bypass capacitor may be added for additional noise filtering, but it is not necessary for stability.
Is LM4050QCIM3-4.1/NOPB qualified for automotive applications?
Yes, LM4050QCIM3-4.1/NOPB is AEC-Q100 Grade 1 qualified (indicated by the "Q" in the part number), rated for operation from −40°C to +125°C ambient temperature. It is manufactured on an automotive-grade flow and meets stress testing requirements for engine control units, ADAS sensors, and body electronics.
What does the "4.1" in LM4050QCIM3-4.1/NOPB signify?
The "4.1" denotes the nominal reverse breakdown voltage of 4.096 V-standardized to match the 1 mV least-significant bit of a 5 V–supplied 12-bit analog-to-digital converter. This precise value is factory-trimmed and guaranteed across temperature and current ranges per TI's LM4050-N datasheet Section 5.7.
How is thermal hysteresis specified for LM4050QCIM3-4.1/NOPB?
LM4050QCIM3-4.1/NOPB exhibits 1.148 mV thermal hysteresis, defined as the voltage shift measured at 25°C before and after cycling between −40°C and +125°C. This parameter reflects mechanical stress-induced drift in the SOT-23 package and is critical for applications requiring repeatable calibration after thermal exposure.
LM4050QCIM3-4.1/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:
- Active
- 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
LM4050QCIM3-4.1/NOPB FAQ
1.How can I place an order for LM4050QCIM3-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCIM3-4.1/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 LM4050QCIM3-4.1/NOPB reliable?
The price and inventory of LM4050QCIM3-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCIM3-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCIM3-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCIM3-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCIM3-4.1/NOPB?
LM4050QCIM3-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCIM3-4.1/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 LM4050QCIM3-4.1/NOPB?
For technical support, including LM4050QCIM3-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCIM3-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050QCIM3-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCIM3-4.1/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 LM4050QCIM3-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCIM3-4.1/NOPB?
All LM4050QCIM3-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCIM3-4.1/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 LM4050QCIM3-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCIM3-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QCIM3-4.1/NOPB Tags
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