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Texas Instruments LM4050AIM3X-5.0/NOPB
- Part No.:
- LM4050AIM3X-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3X-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,703
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Product details
Overview
LM4050AIM3X-5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 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 56 μA to 15 mA supply current and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050AIM3X-5.0/NOPB datasheet, LM4050AIM3X-5.0/NOPB pinout, LM4050AIM3X-5.0/NOPB application, or LM4050AIM3X-5.0/NOPB equivalent, key selection criteria include output voltage accuracy over temperature, low dynamic impedance (0.5 Ω at 1 mA), no-output-capacitor operation, capacitive load tolerance, and AEC-Q100 Grade 1 qualification for automotive variants.
Technical Context
The LM4050AIM3X-5.0/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its three-terminal configuration (Cathode, Anode, NC) enables flexible placement in feedback loops of regulators or as a precision voltage sink.
It achieves stability without external capacitors by integrating low dynamic impedance (0.5 Ω typical) and tolerating unlimited capacitive loads - eliminating layout sensitivity common in series references. The device's 50 ppm/°C max tempco and 120 ppm long-term stability (1000 hrs) support metrology-grade calibration in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and factory-trimmed |
| Initial Tolerance | ±0.1% at 25°C (A grade), enabling single-point calibration in high-precision systems |
| Tempco | ≤50 ppm/°C over −40°C to +125°C, minimizing drift-induced measurement error |
| Operating Current | 56 μA min to 15 mA max, supporting ultra-low-power sensor nodes and high-current reference sinks |
| Noise (10 Hz–10 kHz) | 41 μVrms, critical for 16-bit+ data acquisition without added filtering |
| Dynamic Impedance | 0.5 Ω at 1 mA, ensuring minimal load-regulation error (<2 mV) across 1–15 mA |
| Long-Term Stability | 120 ppm after 1000 hours, supporting 10-year system calibration intervals |
Pinout & Package
SOT-23 (DBZ) package, 3-pin surface-mount, body size 2.92 mm × 1.30 mm. Pin 3 is internally unconnected (NC); Cathode (Pin 1) carries shunt current and sets reference node; Anode (Pin 2) connects to system ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to regulated voltage node; sinks all current not drawn by load - defines precision 5.0 V potential |
| Anode (Pin 2) | Ground reference terminal | Must be connected to clean system ground; serves as return path for shunt current and establishes 0 V reference |
| NC (Pin 3) | No internal connection | Left floating or unconnected; no electrical function - avoids unintended parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero external capacitance - reduces BOM count and PCB area in space-constrained designs |
| Tolerates capacitive loads | Unlimited capacitive loading on cathode - enables direct buffering with op-amps or driving of ADC sample capacitors |
| Fixed 5.0 V breakdown | Factory-trimmed Zener-zap voltage eliminates need for external resistor networks or trimming potentiometers |
| Low quiescent current | 56 μA minimum operating current enables use in always-on battery monitors and energy-harvesting systems |
| Industrial & extended temp range | Specified from −40°C to +125°C - suitable for under-hood automotive, industrial PLCs, and outdoor instrumentation |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
|
Use Scenario: Handheld multimeter with 24-bit sigma-delta ADC requiring stable 5 V reference for full-scale accuracy. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 5.0 V sink node for ADC reference buffer input. Use Value: ±0.1% initial tolerance and 50 ppm/°C tempco ensure <0.02% total error over −10°C to +50°C ambient - meeting Class I meter specs. |
Use Scenario: Modular DAQ module with multiple 16-bit SAR ADCs sharing a common reference rail. IC Role / Device Role / Timing Role: Centralized 5.0 V shunt reference supplying low-noise, low-impedance source to multiple ADC REF pins. Use Value: 41 μVrms noise and 0.5 Ω dynamic impedance prevent crosstalk and maintain ENOB >15.5 across channels. |
| Automotive Sensor Conditioning | Precision Audio Biasing |
|
Use Scenario: Engine control unit (ECU) analog front-end conditioning pressure and temperature sensor signals. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 qualified 5.0 V reference for ratiometric sensor excitation and ADC reference. Use Value: Guaranteed operation from −40°C to +125°C and 120 ppm long-term stability enable 15-year ECU lifetime without recalibration. |
Use Scenario: High-fidelity audio DAC board requiring ultra-low-noise 5 V bias for op-amp rails and analog filters. IC Role / Device Role / Timing Role: Low-noise shunt reference replacing noisy LDOs in analog power domain. Use Value: 41 μVrms noise (10 Hz–10 kHz) directly improves SNR by >10 dB versus standard 5 V LDOs - measurable in THD+N tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | Same 5.0 V, ±0.5% initial tolerance (C grade), higher 100 ppm/°C tempco, 75 μVrms noise | Lower cost; suited for non-critical industrial controls where ±0.5% accuracy suffices | Select when budget constraints outweigh precision requirements and thermal drift is mitigated by software calibration |
| REF5050IDR | Series reference, 5.0 V, ±0.05% initial tolerance, 3 ppm/°C tempco, 5.6 μVrms noise, requires input capacitor | Higher precision and lower noise but needs external components and higher supply headroom (≥6.5 V) | Choose for metrology-grade systems where ultra-low noise and sub-ppm drift justify added complexity and cost |
Compared with TL4050C50IDBZR, LM4050AIM3X-5.0/NOPB delivers 5× tighter initial tolerance and half the noise; versus REF5050IDR, it trades absolute precision for zero-component simplicity and wider supply flexibility - making it optimal for compact, cost-sensitive, yet accuracy-demanding shunt reference roles.
Availability
LM4050AIM3X-5.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and automotive sensor conditioning requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050AIM3X-5.0/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 and embedded processing technologies, with decades of leadership in precision reference design and automotive-qualified components.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-reliability applications - emphasizing accuracy, stability, and ease of use without external components.
FAQ
What is the minimum operating current for LM4050AIM3X-5.0/NOPB?
The LM4050AIM3X-5.0/NOPB requires a minimum operating current of 56 μA at 25°C, rising to 80 μA over the industrial temperature range (−40°C to +85°C) and 90 μA over the extended range (−40°C to +125°C). This low quiescent current enables use in always-on, energy-sensitive applications such as battery-backed sensors and IoT edge nodes. Operation below this threshold risks loss of regulation and increased output impedance.
Does LM4050AIM3X-5.0/NOPB require an external output capacitor?
No, the LM4050AIM3X-5.0/NOPB does not require an external output capacitor - its internal design ensures stability across all load conditions, including zero capacitance. This eliminates BOM items and layout sensitivity. Unlike many shunt references, it also tolerates unlimited capacitive loading on the cathode, simplifying integration with ADC sample-and-hold circuits or op-amp buffers without risk of oscillation.
What is the thermal hysteresis specification for LM4050AIM3X-5.0/NOPB?
The LM4050AIM3X-5.0/NOPB exhibits 1.4 mV maximum thermal hysteresis over a −40°C to +125°C cycle, defined as the voltage difference measured at 25°C after exposure to −40°C versus after exposure to +125°C. This low hysteresis ensures repeatable reference performance in systems undergoing repeated thermal cycling - critical for field-deployed instrumentation and automotive ECUs where calibration integrity must persist across environmental stress.
Is LM4050AIM3X-5.0/NOPB AEC-Q100 qualified?
No - LM4050AIM3X-5.0/NOPB is the industrial-grade variant. The automotive-qualified version is LM4050QAIM3X-5.0/NOPB (AEC-Q100 Grade 1). While both share identical electrical specifications and SOT-23 packaging, only the Q-grade part undergoes automotive-specific stress testing, lot traceability, and PPAP documentation. For non-safety-critical automotive subsystems, the industrial part may be used subject to customer qualification.
How does LM4050AIM3X-5.0/NOPB compare to series voltage references like REF5050?
The LM4050AIM3X-5.0/NOPB is a shunt reference requiring an external current-limiting resistor and sinking all load + reference current to ground, whereas REF5050 is a series reference that sources current and needs ≥6.5 V input for 5 V output. LM4050AIM3X-5.0/NOPB offers simpler layout, no input capacitor, and wider supply flexibility but trades off absolute precision (±0.1% vs ±0.05%) and noise (41 μVrms vs 5.6 μVrms). Its value lies in robustness, simplicity, and space savings - not ultimate metrology performance.
LM4050AIM3X-5.0/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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AIM3X-5.0/NOPB FAQ
1.How can I place an order for LM4050AIM3X-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3X-5.0/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 LM4050AIM3X-5.0/NOPB reliable?
The price and inventory of LM4050AIM3X-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3X-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AIM3X-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3X-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3X-5.0/NOPB?
LM4050AIM3X-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3X-5.0/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 LM4050AIM3X-5.0/NOPB?
For technical support, including LM4050AIM3X-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3X-5.0/NOPB requirements.
6.How does Aetrix verify that LM4050AIM3X-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3X-5.0/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 LM4050AIM3X-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AIM3X-5.0/NOPB?
All LM4050AIM3X-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3X-5.0/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 LM4050AIM3X-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050AIM3X-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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