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Texas Instruments LM4050QBIM3X2.5/NOPB
- Part No.:
- LM4050QBIM3X2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QBIM3X2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,493
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Product details
Overview
LM4050QBIM3X2.5/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 - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050QBIM3X2.5/NOPB datasheet, LM4050QBIM3X2.5/NOPB pinout, LM4050QBIM3X2.5/NOPB application, or LM4050QBIM3X2.5/NOPB equivalent, key selection criteria include output voltage stability under capacitive loads, no-output-capacitor operation, low dynamic impedance (0.3 Ω), thermal hysteresis (0.7 mV), and AEC-Q100 Grade 1 qualification for automotive use cases.
Technical Context
The LM4050QBIM3X2.5/NOPB uses bandgap-derived Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its design eliminates external stabilization capacitors while maintaining stability across all capacitive loads - enabled by low dynamic impedance (0.3 Ω at 1 mA) and inherent phase margin optimization.
It functions as a two-terminal device: cathode accepts input current and sets reference voltage via reverse breakdown; anode connects to system ground. The NC pin (Pin 3) is unconnected internally and must be left floating or tied to anode - critical for correct biasing and thermal performance in space-constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; enables precise 2.5 V bias for 12-bit+ SAR ADCs and rail-to-rail op-amps without trimming. |
| Initial Tolerance | ±0.1% at 25°C (A-grade); ensures ≤±2.5 mV absolute error at room temperature, reducing calibration overhead. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +125°C; contributes ≤±13 mV drift across full range, supporting stable sensor front-ends. |
| Operating Current | 60 μA min to 15 mA max; allows ultra-low-power sleep modes and high-current buffer drive simultaneously. |
| Noise (10 Hz–10 kHz) | 41 μVrms; limits added noise to <0.01 LSB in 16-bit 2.5 V full-scale systems. |
| Dynamic Impedance | 0.3 Ω at 1 mA; maintains voltage regulation within ±0.3 mV under 1 mA load transients. |
| Long-Term Stability | 120 ppm after 1000 hrs; corresponds to ~3 μV drift/year, suitable for metrology-grade equipment. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with gull-wing leads. Thermal resistance RθJA = 287°C/W (board-mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Accepts input current; reverse breakdown voltage develops here relative to anode - must be driven through series resistor. |
| Anode (Pin 2) | Reference ground return | Common connection point for load and bypass networks; ties directly to system ground plane for lowest noise path. |
| NC (Pin 3) | No internal connection | Must remain unconnected or tied to Pin 2; floating NC prevents parasitic coupling and ensures specified thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with 0–∞ capacitive load enables direct connection to ADC REF pins without risk of oscillation. |
| Tolerates capacitive loads | Guaranteed phase margin >45° up to 10 μF; eliminates need for isolation resistors in high-ESR filter networks. |
| Fixed 2.5 V output | Factory-trimmed Zener-zap wafer sort ensures 2.500 V ±0.1% without post-package adjustment or external components. |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (−40°C to +125°C) and lifetime reliability per JESD47 stress testing. |
| Low micropower operation | 60 μA minimum operating current enables battery life extension in always-on sensor nodes and IoT edge devices. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V excitation for precision current sources and ADC reference input. Use Value: Enables ±0.02% measurement accuracy across −10°C to +50°C ambient with no recalibration. | Use Scenario: Industrial PLC analog input module sampling 8 channels at 10 kSPS. IC Role / Device Role / Timing Role: Common reference source for multiplexed 12-bit SAR ADCs and anti-aliasing filter biasing. Use Value: Eliminates channel-to-channel gain mismatch caused by discrete references; reduces BOM count by 75%. |
| Automotive Sensor Conditioning | Precision Audio Signal Chain |
Use Scenario: Exhaust gas oxygen sensor signal conditioner in engine control unit (ECU). IC Role / Device Role / Timing Role: Bias reference for op-amp-based transimpedance amplifier and ratiometric ADC interface. Use Value: Maintains <±0.5% sensor linearity over full AEC-Q100 Grade 1 temperature range without derating. | Use Scenario: High-fidelity DAC output stage with active I/V conversion and DC servo loop. IC Role / Device Role / Timing Role: Low-noise 2.5 V reference for op-amp offset nulling and common-mode voltage setting. Use Value: Reduces THD+N floor by 8 dB vs. standard bandgap references due to 41 μVrms noise performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | 2.5 V adjustable via external resistors; 2% initial tolerance; higher 200 ppm/°C tempco; requires ≥1 mA cathode current. | Lower cost for non-precision applications; unsuitable for <16-bit systems or wide-temp automotive use. | Select only when absolute accuracy and low drift are not required; verify stability with target load capacitance. |
| REF3025AIDBZR | 2.5 V series reference; 0.2% initial tolerance; 50 ppm/°C tempco; 50 μVrms noise; requires 50 μA supply current. | Three-terminal architecture simplifies layout but demands dedicated supply rail; not drop-in compatible. | Prefer when ground-referenced topology is undesirable or when load regulation below 1 mV is critical. |
Compared with TL431CDBZR and REF3025AIDBZR, the LM4050QBIM3X2.5/NOPB delivers superior initial accuracy and lower noise in a two-terminal shunt configuration - enabling simpler, smaller, and more robust designs for high-resolution measurement systems where ground-referenced biasing is acceptable.
Availability
LM4050QBIM3X2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition modules, and automotive sensor conditioning requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050QBIM3X2.5/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 leader specializing in analog, embedded processing, and connectivity technologies, with over 50 years of innovation in precision analog ICs.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and automotive-grade systems demanding high initial accuracy, low drift, and robust capacitive-load stability.
FAQ
What is the minimum operating current for LM4050QBIM3X2.5/NOPB?
The LM4050QBIM3X2.5/NOPB requires a minimum operating current of 60 μA at 25°C, increasing to 65 μA across the full industrial temperature range (−40°C to +85°C). This low quiescent current enables use in energy-harvesting and coin-cell-powered applications where standby power budget is critical. The device remains functional and stable down to this threshold, maintaining its 2.5 V output within specification.
Does LM4050QBIM3X2.5/NOPB require an external output capacitor?
No, the LM4050QBIM3X2.5/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load - including 0 μF - eliminating the need for external compensation components. This simplifies PCB layout, reduces BOM count, and avoids potential oscillation issues common with traditional shunt references when driving ADC reference inputs or op-amp bias networks.
Is LM4050QBIM3X2.5/NOPB qualified for automotive applications?
Yes, the LM4050QBIM3X2.5/NOPB is AEC-Q100 Grade 1 qualified, meaning it is certified for automotive ambient temperature operation from −40°C to +125°C and has undergone rigorous reliability stress testing per JESD47 standards. It is manufactured on an automotive-grade flow and supports safety-critical subsystems such as engine control, exhaust sensing, and ADAS sensor interfaces where long-term parametric stability is mandatory.
What is the thermal hysteresis specification for LM4050QBIM3X2.5/NOPB?
The LM4050QBIM3X2.5/NOPB exhibits a thermal hysteresis of 0.7 mV, measured as the voltage difference at 25°C after cycling between −40°C and +125°C. This low hysteresis ensures repeatable reference performance during thermal cycling in field-deployed equipment - critical for metrology instruments, calibration tools, and closed-loop control systems where measurement repeatability must be preserved across environmental transitions.
How does LM4050QBIM3X2.5/NOPB compare to LM4040 in terms of noise and accuracy?
The LM4050QBIM3X2.5/NOPB offers lower wideband noise (41 μVrms) than the LM4040 (typically 50–60 μVrms) and tighter initial tolerance (±0.1% vs. ±0.2% for LM4040A). Both use shunt topology, but the LM4050QBIM3X2.5/NOPB achieves improved temperature coefficient (50 ppm/°C max vs. 100 ppm/°C for LM4040) and better long-term stability (120 ppm vs. 150 ppm), making it preferred for 16-bit+ precision systems where reference-induced errors dominate total uncertainty.
LM4050QBIM3X2.5/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:
- ±0.2%
- 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
LM4050QBIM3X2.5/NOPB FAQ
1.How can I place an order for LM4050QBIM3X2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QBIM3X2.5/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 LM4050QBIM3X2.5/NOPB reliable?
The price and inventory of LM4050QBIM3X2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QBIM3X2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QBIM3X2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QBIM3X2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QBIM3X2.5/NOPB?
LM4050QBIM3X2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QBIM3X2.5/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 LM4050QBIM3X2.5/NOPB?
For technical support, including LM4050QBIM3X2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QBIM3X2.5/NOPB requirements.
6.How does Aetrix verify that LM4050QBIM3X2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QBIM3X2.5/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 LM4050QBIM3X2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QBIM3X2.5/NOPB?
All LM4050QBIM3X2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QBIM3X2.5/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 LM4050QBIM3X2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050QBIM3X2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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