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Texas Instruments LM4050QCIM3X2.5/NOPB
- Part No.:
- LM4050QCIM3X2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCIM3X2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,708
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Product details
Overview
LM4050QCIM3X2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.5 V reverse breakdown voltage with ±0.1% initial tolerance (A-grade), 50 ppm/°C max temperature coefficient, and 41 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges, enabling use in high-accuracy analog front-ends for portable instrumentation.
For engineers reviewing the LM4050QCIM3X2.5/NOPB datasheet, LM4050QCIM3X2.5/NOPB pinout, LM4050QCIM3X2.5/NOPB application, or LM4050QCIM3X2.5/NOPB equivalent, key selection criteria include output voltage stability under capacitive loads, low quiescent current operation, no external capacitor requirement, thermal hysteresis ≤0.7 mV, and AEC-Q100 Grade 1 qualification for automotive subsystems.
Technical Context
The LM4050QCIM3X2.5/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its dynamic impedance remains ≤0.3 Ω at 1 mA, ensuring minimal load regulation error across 60 μA–15 mA operating current.
It achieves ±0.1% initial accuracy at 25°C and maintains ≤±11 mV total voltage tolerance over −40°C to +85°C (industrial range), validated via fuse-trim and wafer-sort calibration. The device tolerates unlimited capacitive loads without oscillation due to intrinsic phase margin design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal reverse breakdown voltage, fixed and non-adjustable |
| Initial Tolerance | ±0.1% at 25°C (A-grade), enabling high-precision ADC/DAC biasing without trimming |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to +85°C, limiting drift to ±11 mV across full industrial range |
| Operating Current | 60 μA min to 15 mA max - supports ultra-low-power sensor nodes and robust industrial supplies |
| Output Noise | 41 μVrms (10 Hz–10 kHz), suitable for 16-bit+ data acquisition systems |
| Dynamic Impedance | 0.3 Ω typical at 1 mA, minimizing voltage shift under dynamic load transients |
| Long-Term Stability | 120 ppm after 1000 hrs, ensuring calibration integrity in field-deployed equipment |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, body size 2.92 mm × 1.30 mm, JEDEC MO-178 compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Connects to regulated supply rail; sinks all load + reference current; sets output voltage at this node |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; defines 0 V reference for cathode voltage |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or pad required; not electrically bonded |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load up to ∞, eliminating BOM cost and layout risk |
| Fixed 2.5 V breakdown | Factory-trimmed Zener-zap voltage eliminates external resistor networks and calibration steps |
| Micropower operation | 60 μA minimum current enables battery life extension in always-on sensing applications |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (−40°C to +125°C) and reliability stress testing |
| Low thermal hysteresis | 0.7 mV max hysteresis after −40°C ↔ +125°C cycling preserves measurement repeatability |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 24-bit sigma-delta ADC requiring stable reference under varying battery voltage and temperature. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 2.5 V reference for ADC internal gain stage and external sensor excitation. Use Value: ±0.1% initial tolerance and 50 ppm/°C TC ensure <0.02% full-scale error across operating range without recalibration. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals with 16-bit resolution. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and SAR ADC reference buffer. Use Value: 41 μVrms noise and 0.3 Ω dynamic impedance prevent noise coupling and maintain ENOB >15.5 bits. |
| Automotive Cabin Sensors | Precision Audio Biasing |
Use Scenario: Occupant detection system using thermopile array with low-drift signal conditioning in vehicle cabin. IC Role / Device Role / Timing Role: Stable 2.5 V reference for op-amp offset nulling and ADC reference in AEC-Q100-compliant subsystem. Use Value: Grade 1 qualification and ≤0.7 mV thermal hysteresis ensure consistent calibration across thermal cycling in uncontrolled environments. |
Use Scenario: High-fidelity audio DAC output stage requiring ultra-low-noise bias for Class-AB output buffers. IC Role / Device Role / Timing Role: Low-noise shunt reference supplying clean 2.5 V to op-amp feedback network and DAC reference pin. Use Value: 41 μVrms noise floor directly limits THD+N floor; no capacitor needed avoids ceramic microphonics in audio path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | Series reference (not shunt); requires ≥20 μA supply current; 50 ppm/°C TC; 25 μVrms noise | Needs dedicated supply rail; unsuitable for floating or high-side sensing topologies | Choose when supply headroom allows series topology and lower noise is critical |
| ADR3425ARTZ-R7 | Series reference; 10 μA quiescent current; 20 ppm/°C TC; 12 μVrms noise; requires ≥2.7 V input | Cannot regulate below input rail; incompatible with low-headroom or current-sink configurations | Prefer for ultra-low-IQ battery systems where input voltage ≥2.7 V is guaranteed |
Compared with REF3025AIDBZR and ADR3425ARTZ-R7, the LM4050QCIM3X2.5/NOPB uniquely supports shunt-mode operation with zero minimum headroom, enabling direct connection to arbitrary voltage rails and compatibility with current-source-driven sensors - a capability neither series alternative provides.
Availability
LM4050QCIM3X2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and automotive cabin sensor modules requiring stable component supply with long-term parametric consistency and automotive-grade reliability.
Supply support for LM4050QCIM3X2.5/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-qualified components.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, high-accuracy applications including portable test equipment, automotive sensors, and industrial process control - emphasizing factory-trimmed stability and capacitor-free operation.
FAQ
What is the minimum operating current for LM4050QCIM3X2.5/NOPB?
The LM4050QCIM3X2.5/NOPB requires a minimum operating current of 60 μA at 25°C to maintain regulation within specification. This value increases slightly to 65 μA across the full industrial temperature range (−40°C to +85°C). Below this threshold, the device exits regulation and output voltage drops nonlinearly. Designers must ensure the external current source or resistor network guarantees ≥60 μA under worst-case conditions, including lowest input voltage and highest temperature.
Does LM4050QCIM3X2.5/NOPB require an external capacitor for stability?
No, the LM4050QCIM3X2.5/NOPB does not require an external capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to large bulk capacitance or long PCB traces. This eliminates capacitor-related BOM cost, footprint, and potential failure modes such as aging or microphonics - a key differentiator versus many competing shunt references that mandate specific output capacitance values.
Is LM4050QCIM3X2.5/NOPB qualified for automotive applications?
Yes, the LM4050QCIM3X2.5/NOPB is AEC-Q100 Grade 1 qualified, meaning it is certified for operation from −40°C to +125°C ambient temperature and has passed stress tests including HTOL, temperature cycling, and ESD per automotive standards. This makes it suitable for cabin, chassis, and powertrain subsystems where reliability under thermal and electrical stress is mandatory - unlike standard industrial-grade variants of the LM4050-N family.
What is the thermal hysteresis specification for LM4050QCIM3X2.5/NOPB?
The LM4050QCIM3X2.5/NOPB exhibits ≤0.7 mV thermal hysteresis, defined as the voltage difference measured at 25°C after cycling between −40°C and +125°C. This low hysteresis ensures repeatable reference performance in systems subject to repeated thermal cycling - critical for field-deployed instrumentation and automotive ECUs where calibration stability over time and temperature history is essential to maintain measurement accuracy.
How does the output voltage tolerance of LM4050QCIM3X2.5/NOPB change over temperature?
At 25°C, the LM4050QCIM3X2.5/NOPB has ±0.1% initial tolerance (A-grade). Over the industrial temperature range (−40°C to +85°C), total tolerance expands to ±11 mV (±0.44%) due to its maximum 50 ppm/°C temperature coefficient. This is calculated as ±0.1% ± (50 ppm/°C × 65°C × 2.5 V) = ±0.1% ± 8.125 mV → ±11 mV absolute. The datasheet guarantees this bound via statistical correlation, not just worst-case summation.
LM4050QCIM3X2.5/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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 41µVrms
- 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
LM4050QCIM3X2.5/NOPB FAQ
1.How can I place an order for LM4050QCIM3X2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCIM3X2.5/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 LM4050QCIM3X2.5/NOPB reliable?
The price and inventory of LM4050QCIM3X2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCIM3X2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCIM3X2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCIM3X2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCIM3X2.5/NOPB?
LM4050QCIM3X2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCIM3X2.5/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 LM4050QCIM3X2.5/NOPB?
For technical support, including LM4050QCIM3X2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCIM3X2.5/NOPB requirements.
6.How does Aetrix verify that LM4050QCIM3X2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCIM3X2.5/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 LM4050QCIM3X2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCIM3X2.5/NOPB?
All LM4050QCIM3X2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCIM3X2.5/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 LM4050QCIM3X2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCIM3X2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QCIM3X2.5/NOPB Tags
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