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Texas Instruments LM4050AIM3X-4.1/NOPB
- Part No.:
- LM4050AIM3X-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3X-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,375
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Product details
Overview
LM4050AIM3X-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a nominal 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 and requires no output capacitor.
For engineers reviewing the LM4050AIM3X-4.1/NOPB datasheet, LM4050AIM3X-4.1/NOPB pinout, LM4050AIM3X-4.1/NOPB application, or LM4050AIM3X-4.1/NOPB equivalent, key selection criteria include its fixed 4.096 V output, ultra-low operating current, capacitive-load stability, industrial/automotive-grade thermal performance, and SOT-23 footprint compatibility with space-constrained data acquisition and portable instrumentation designs.
Technical Context
The LM4050AIM3X-4.1/NOPB uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 4.096 V reference across −40°C to +125°C. Its dynamic impedance is 0.5 Ω at 1 mA, and it tolerates unlimited capacitive loads without oscillation due to internal compensation.
This device functions as a two-terminal shunt regulator: cathode accepts input current and sets reference voltage via reverse breakdown; anode connects to system ground; pin 3 is unconnected. It replaces traditional Zener diodes in high-accuracy applications where low quiescent current and tight voltage tolerance are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal - precisely matches 12-bit DAC full-scale resolution (e.g., 4096 LSB = 4.096 V) |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables calibration-free designs in portable test equipment |
| Temp Coefficient | ≤50 ppm/°C - ensures ≤±3.3 mV drift over −40°C to +125°C ambient |
| Operating Current | 73 μA min to 15 mA max - supports ultra-low-power sensor nodes and high-current ADC biasing |
| Output Noise | 93 μVrms (10 Hz–10 kHz) - suitable for 16-bit SAR ADC reference without external filtering |
| Dynamic Impedance | 0.5 Ω at 1 mA - minimizes load-induced voltage shift in varying-current applications |
| Long-Term Stability | 120 ppm (1000 hrs) - ensures <0.5 mV drift over 1 year in sealed instrumentation |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sensing node | Connects to supply rail through series resistor; sets reference voltage by sinking adjustable current |
| Anode (Pin 2) | Ground reference terminal | Must be connected directly to system ground plane; defines 0 V reference for output voltage |
| NC (Pin 3) | No internal connection | Must remain floating; PCB pad may be omitted or left unconnected per TI DBZ layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for unconditional stability with any capacitive load up to 10 µF |
| Fixed 4.096 V output | Exact match for 12-bit digital systems (4096 steps), eliminating scaling errors in microcontroller ADC references |
| Wide operating current range | 73 μA to 15 mA enables use in both battery-powered sensors and high-speed data converters |
| Low thermal hysteresis | 1.148 mV over −40°C ↔ +125°C cycling - preserves accuracy after thermal stress in automotive ECUs |
| AEC-Q100 Grade 1 qualified variant available | LM4050AIM3X-4.1/NOPB shares process and qualification flow with automotive-grade LM4050-N-Q1 family |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and lithium coin-cell power supply. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V excitation for precision resistive divider and ADC reference input. Use Value: Enables ±0.01% measurement accuracy over battery discharge (2.0–3.3 V) and −10°C to +50°C without recalibration. |
Use Scenario: Industrial PLC analog input module acquiring 8-channel 12-bit sensor data at 1 kSPS. IC Role / Device Role / Timing Role: Primary voltage reference for multiplexed SAR ADC and isolated current-loop transmitter DAC. Use Value: Maintains <±0.5 LSB total unadjusted error across 15-year field deployment due to 120 ppm long-term stability. |
| Energy Management Units | Precision Audio Components |
Use Scenario: Smart electricity meter with metrology SoC requiring accurate voltage scaling for RMS calculations. IC Role / Device Role / Timing Role: Reference source for anti-aliasing filter gain-setting and ADC full-scale calibration. Use Value: 50 ppm/°C tempco ensures <±0.1% energy billing error across −25°C to +70°C outdoor enclosure environments. |
Use Scenario: High-fidelity DAC-based headphone amplifier with discrete op-amp output stage. IC Role / Device Role / Timing Role: Low-noise voltage reference for DAC internal bias network and analog output stage offset trimming. Use Value: 93 μVrms noise contributes <−105 dB THD+N floor, preserving 24-bit audio 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 |
|---|---|---|---|
| REF3040AIDBZR | Series reference (not shunt); 4.096 V, ±0.2% initial tolerance; requires minimum 100 μA load current | Needs external bypass cap; incompatible with high-impedance bias networks or floating-ground topologies | Select when system ground is fixed and load current >100 μA is guaranteed |
| ADR3440ARJZ-R7 | Series reference; 4.096 V, ±0.1% initial tolerance; 35 μVrms noise; 35 ppm/°C tempco | Lower noise and tempco but higher quiescent current (120 μA); not pin-compatible | Prefer for ultra-low-noise audio or metrology where board area allows SOT-23-5 and ground-referenced architecture |
Compared with REF3040AIDBZR and ADR3440ARJZ-R7, the LM4050AIM3X-4.1/NOPB offers true two-terminal operation, zero minimum load requirement, and proven stability with capacitive loads-making it uniquely suited for floating-reference, low-quiescent, and space-constrained shunt-regulator implementations.
Availability
LM4050AIM3X-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management units requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050AIM3X-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 leader specializing in analog and embedded processing technologies, with over 50 years of precision reference design heritage.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems across industrial, automotive, and portable electronics.
FAQ
What is the minimum operating current for LM4050AIM3X-4.1/NOPB?
The LM4050AIM3X-4.1/NOPB requires a minimum operating current of 73 μA at 25°C and up to 78 μA across the extended −40°C to +125°C temperature range. This value is specified for the A-grade 4.096 V variant and ensures stable regulation within tolerance. Below this current, the device exits regulation and output voltage collapses.
Does LM4050AIM3X-4.1/NOPB require an external capacitor for stability?
No, the LM4050AIM3X-4.1/NOPB does not require an external output capacitor. Its internal compensation ensures unconditional stability with any capacitive load, including ceramic, tantalum, or electrolytic types up to 10 µF. This eliminates board space and cost associated with external stabilization components.
What is the thermal hysteresis specification for LM4050AIM3X-4.1/NOPB?
The LM4050AIM3X-4.1/NOPB exhibits 1.148 mV thermal hysteresis over a −40°C to +125°C temperature cycle, measured as the voltage difference at 25°C before and after extreme-temperature exposure. This low hysteresis supports repeatable calibration in automotive and industrial control applications subject to thermal cycling.
Is LM4050AIM3X-4.1/NOPB qualified for automotive applications?
The LM4050AIM3X-4.1/NOPB is not AEC-Q100 qualified; however, it shares the same silicon process, wafer sort trim methodology, and qualification flow as the LM4050-N-Q1 automotive-grade family. For production automotive use, TI recommends the LM4050QAIM3X-4.1/NOPB (AEC-Q100 Grade 1).
How does the output voltage of LM4050AIM3X-4.1/NOPB change with load current?
Over 1 mA to 15 mA, the LM4050AIM3X-4.1/NOPB exhibits ≤7 mV change in output voltage (ΔVR/ΔIR) at 25°C and ≤10 mV across −40°C to +125°C. This load regulation performance stems from its 0.5 Ω dynamic impedance and enables stable referencing in variable-current signal chains like programmable gain amplifiers.
LM4050AIM3X-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:
- ±0.1%
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AIM3X-4.1/NOPB FAQ
1.How can I place an order for LM4050AIM3X-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3X-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 LM4050AIM3X-4.1/NOPB reliable?
The price and inventory of LM4050AIM3X-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 LM4050AIM3X-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AIM3X-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3X-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3X-4.1/NOPB?
LM4050AIM3X-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3X-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 LM4050AIM3X-4.1/NOPB?
For technical support, including LM4050AIM3X-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3X-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050AIM3X-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3X-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 LM4050AIM3X-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AIM3X-4.1/NOPB?
All LM4050AIM3X-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3X-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 LM4050AIM3X-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050AIM3X-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AIM3X-4.1/NOPB Tags
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