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Texas Instruments LM4050AIM3X-2.0/NOPB
- Part No.:
- LM4050AIM3X-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3X-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,211
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Product details
Overview
LM4050AIM3X-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.048 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 - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050AIM3X-2.0/NOPB datasheet, LM4050AIM3X-2.0/NOPB pinout, LM4050AIM3X-2.0/NOPB application, or LM4050AIM3X-2.0/NOPB equivalent, key selection criteria include its no-output-capacitor-required operation, capacitive-load tolerance, sub-1 mV thermal hysteresis, and guaranteed stability across full current and temperature range without external compensation.
Technical Context
The LM4050AIM3X-2.0/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling ±0.1% accuracy at 25°C and <±50 ppm/°C drift over −40°C to +125°C. Its dynamic impedance remains ≤0.3 Ω at 1 mA, ensuring minimal load regulation error (<6 mV change from 1 mA to 15 mA).
Unlike series references, it functions as a two-terminal device requiring only an external current source; cathode regulates voltage by sinking variable current 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.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - precise enough for 12-bit ADC full-scale reference without trimming. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - eliminates need for post-assembly calibration in production test systems. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +125°C - ensures <±1.3 mV drift across full industrial range. |
| Operating Current | 60 μA min to 15 mA max - supports ultra-low-power sensor nodes and high-current precision DACs. |
| Output Noise | 41 μVrms (10 Hz–10 kHz) - enables high-SNR measurements in audio and instrumentation front-ends. |
| Dynamic Impedance | 0.3 Ω at 1 mA - minimizes output voltage shift under varying load current (e.g., SAR ADC sampling bursts). |
| Long-Term Stability | 120 ppm over 1000 hrs - ensures reference integrity in deployed energy metering or medical devices. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178AC compliant. Thermal resistance RθJA = 287°C/W (board mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage regulation node | Connects to supply rail via current-setting resistor; sinks all excess current to maintain 2.048 V at this node. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms low-impedance return path for shunt current and noise rejection. |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 per TI datasheet - not usable as thermal pad or auxiliary terminal. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero external capacitance - reduces BOM count and PCB area in space-constrained wearables. |
| Tolerates capacitive loads | Remains stable with ≥100 nF load capacitance - simplifies filtering for noise-sensitive analog signal chains. |
| Fixed 2.048 V output | Exact binary-scaled voltage (211 mV) - matches 12-bit DAC/ADC full-scale codes without scaling resistors. |
| Low quiescent current | 60 μA minimum operating current - enables multi-year battery life in IoT endpoint sensors. |
| Industrial & extended temp support | Specified from −40°C to +125°C - qualified for automotive cabin and industrial motor control environments. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and lithium coin-cell power. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V for ADC VREF input and internal DAC calibration. Use Value: Enables ±0.02% measurement accuracy over battery discharge (2.0 V–3.3 V) without recalibration. |
Use Scenario: Isolated 8-channel thermocouple logger with cold-junction compensation. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end PGA gain-setting and ADC reference. Use Value: Maintains <±1 LSB error across −40°C to +85°C ambient, meeting IEC 61000-4-3 immunity requirements. |
| Energy Monitoring | Precision Audio Signal Chain |
Use Scenario: DIN-rail mounted electricity meter with metrology-grade AFE. IC Role / Device Role / Timing Role: Reference for current-sense amplifier offset nulling and ADC reference in polyphase metering SoC. Use Value: Delivers 120 ppm long-term stability over 10-year field deployment, satisfying ANSI C12.20 Class 0.2 accuracy. |
Use Scenario: Studio-grade headphone amplifier with discrete op-amp gain stages. IC Role / Device Role / Timing Role: Low-noise DC bias reference for op-amp input common-mode setting and DAC output buffering. Use Value: 41 μVrms noise contributes <−110 dBu residual noise floor, preserving 24-bit dynamic range. |
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, but ±0.5% initial tolerance (C grade); higher 100 μVrms noise; 100 μA min operating current. | Acceptable for cost-sensitive 10-bit systems where calibration is performed; not suitable for uncalibrated 12-bit+ designs. | Select TL4050C20IDBZR only if budget constraints outweigh accuracy/noise requirements and system allows factory calibration. |
| ADR3420ARJZ-R7 | Series reference (not shunt); 2.048 V output; ±0.1% tolerance; 7 μVrms noise; requires input-to-output headroom (2.5 V min supply). | Used where low-noise and high PSRR are critical, but board layout permits 3-terminal topology and higher supply voltage. | Choose ADR3420ARJZ-R7 when ultra-low noise and supply ripple rejection are prioritized over simplicity and low-voltage operation. |
Compared with TL4050C20IDBZR, LM4050AIM3X-2.0/NOPB delivers 2.5× lower noise and tighter initial tolerance for calibrated systems; versus ADR3420ARJZ-R7, it eliminates headroom requirement and simplifies biasing in 2.2 V–3.6 V battery-powered designs despite higher noise.
Availability
LM4050AIM3X-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, energy monitoring, data acquisition, and precision audio applications requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4050AIM3X-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 and embedded processing technologies, with over 50 years of precision reference design heritage.
The LM4050-N product line was engineered for space-constrained, micropower applications demanding high initial accuracy and low temperature drift - targeting portable test equipment, industrial sensors, and automotive subsystems.
FAQ
What is the minimum operating current for LM4050AIM3X-2.0/NOPB?
The LM4050AIM3X-2.0/NOPB requires a minimum operating current of 60 μA at 25°C to maintain regulation within specifications. At full temperature range (−40°C to +125°C), the minimum increases to 65 μA. Below this threshold, the device exits regulation and output voltage collapses.
Can LM4050AIM3X-2.0/NOPB drive capacitive loads without oscillation?
Yes - the LM4050AIM3X-2.0/NOPB is explicitly designed to remain stable with any capacitive load, including >100 nF ceramic or tantalum capacitors. This eliminates the need for series isolation resistors or external compensation networks commonly required with other shunt references.
Is Pin 3 (NC) on LM4050AIM3X-2.0/NOPB electrically connected internally?
No - Pin 3 is a no-connect terminal with no internal bond wire or silicon connection. Per TI's datasheet, it must be left floating or tied to Pin 2 (Anode); using it as a thermal pad or grounding point violates the specified DBZ package configuration and may impact thermal performance or reliability.
What is the long-term stability specification for LM4050AIM3X-2.0/NOPB?
The LM4050AIM3X-2.0/NOPB exhibits 120 ppm maximum reverse breakdown voltage shift after 1000 hours of operation at 25°C and 100 μA bias current. This value reflects typical aging behavior under controlled conditions and supports lifetime accuracy predictions in sealed, temperature-stable applications.
Does LM4050AIM3X-2.0/NOPB require an external output capacitor for stability?
No - the LM4050AIM3X-2.0/NOPB is uniquely designed to operate stably with zero external output capacitance. Its internal architecture eliminates the phase-margin degradation that plagues conventional shunt references, making it ideal for ultra-low-component-count designs.
LM4050AIM3X-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:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AIM3X-2.0/NOPB FAQ
1.How can I place an order for LM4050AIM3X-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3X-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 LM4050AIM3X-2.0/NOPB reliable?
The price and inventory of LM4050AIM3X-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 LM4050AIM3X-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AIM3X-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3X-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3X-2.0/NOPB?
LM4050AIM3X-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3X-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 LM4050AIM3X-2.0/NOPB?
For technical support, including LM4050AIM3X-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3X-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050AIM3X-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3X-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 LM4050AIM3X-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AIM3X-2.0/NOPB?
All LM4050AIM3X-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3X-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 LM4050AIM3X-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050AIM3X-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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