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Texas Instruments LM4050QBEM3-2.0/NOPB
- Part No.:
- LM4050QBEM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QBEM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,474
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Product details
Overview
LM4050QBEM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V ±0.1% (A-grade) output at 25°C, with 50 ppm/°C max temperature coefficient, 41 μVrms wideband noise (10 Hz–10 kHz), and stable operation from 60 μA to 15 mA supply current. It enables high-accuracy ADC/DAC biasing in space-constrained battery-powered instrumentation.
For engineers reviewing the LM4050QBEM3-2.0/NOPB datasheet, LM4050QBEM3-2.0/NOPB pinout, LM4050QBEM3-2.0/NOPB application, or LM4050QBEM3-2.0/NOPB equivalent, key selection criteria include initial voltage tolerance, low-noise performance, capacitive-load stability without external capacitor, extended temperature range (−40°C to 125°C), and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4050QBEM3-2.0/NOPB implements a curvature-corrected bandgap shunt reference architecture with Zener-zap trim for ±0.1% initial accuracy. Its internal compensation eliminates need for output capacitor while maintaining stability across all capacitive loads.
It operates as a two-terminal device: cathode regulates against anode (ground), with reverse breakdown voltage defined at 100 μA test current. Minimum operating current is 60 μA (typical) at 25°C, rising to 65 μA over −40°C to 125°C ambient, and dynamic impedance is 0.3 Ω at 1 mA/120 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables exact 1 mV LSB for 11-bit systems or precise scaling in 2.5 V rail domains. |
| Initial Tolerance (A grade) | ±0.1% at 25°C; corresponds to ±2.048 mV absolute error-critical for calibration-critical data acquisition. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C; ensures ≤±10.24 mV drift across full industrial+auto range. |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz); supports 16-bit effective resolution in low-frequency precision measurement. |
| Operating Current Range | 60 μA to 15 mA; allows ultra-low-power sensor nodes and robust regulation under varying load conditions. |
| Thermal Hysteresis | 0.7 mV (ΔT = −40°C ↔ 125°C); limits repeatability error after thermal cycling in field-deployed equipment. |
| Long-Term Stability | 120 ppm (1000 hrs @ 25°C); supports >10-year system calibration intervals without recalibration. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178 compatible. Anode (pin 2) is ground reference; cathode (pin 1) carries regulated shunt current; pin 3 is NC (no internal connection) and must be left floating or tied to pin 2 per TI layout guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage node | Connects to series resistor (RS) from unregulated supply; voltage develops between this pin and anode. |
| Anode (Pin 2) | Ground reference / common return | Must be connected to system ground; defines 0 V reference for 2.048 V output; serves as current return path. |
| NC (Pin 3) | No internal connection | Must remain unconnected or tied to pin 2; prevents EMI coupling in noisy environments per TI recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for stability with any capacitive load-reduces BOM count and PCB area in portable designs. |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications operating from −40°C to 125°C ambient, supporting engine control and ADAS modules. |
| Low 60 μA minimum current | Enables operation in energy-harvesting and coin-cell-powered systems where quiescent current is critical. |
| Fixed 2.048 V output | Matches binary-weighted DAC/ADC full-scale ranges (e.g., 211 × 1 mV), eliminating trimming resistors and calibration overhead. |
| Tolerates capacitive loads | Stable with >100 nF bypass or filter capacitance-simplifies noise filtering in mixed-signal sensor front-ends. |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter or portable gas analyzer using 12-bit SAR ADC powered by single Li-ion cell. IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for ADC VREF, directly setting LSB size and full-scale range. Use Value: Enables ±0.05% measurement accuracy over temperature without recalibration, extending field service intervals. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals with 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift reference to ADC's internal reference buffer and external gain stage. Use Value: Maintains ENOB ≥15.2 bits across −40°C to 85°C, meeting IEC 61000-6-2 immunity requirements. |
| Automotive Sensor Conditioning | Energy Metering Reference |
Use Scenario: Tire pressure monitoring system (TPMS) ECU measuring piezoresistive bridge output with microamp-level supply budget. IC Role / Device Role / Timing Role: Shunt reference establishing excitation voltage for bridge and reference for ratiometric ADC conversion. Use Value: Delivers <60 μA quiescent current while sustaining ±0.2% total error over lifetime-meeting ISO 26262 ASIL-B functional safety targets. |
Use Scenario: Smart electricity meter using metrology SoC (e.g., MSP430i2041) with integrated 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Precision voltage reference for ADC reference input and internal bandgap calibration loop. Use Value: Supports ANSI C12.20 Class 0.2 accuracy certification with <10 ppm/°C effective drift contribution. |
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, ±0.5% initial tolerance (C grade), 100 ppm/°C max tempco, 60 μA min current. | Lacks AEC-Q100 qualification; rated only for −40°C to 85°C industrial range-not suitable for under-hood automotive use. | Select when cost sensitivity outweighs grade-A accuracy and automotive qualification requirements. |
| ADR3420ARJZ-R7 | 2.048 V output, ±0.1% initial tolerance, 30 ppm/°C max tempco, but requires 100 μA min current and 1 μF output capacitor. | Series reference topology; higher quiescent current and external capacitor dependency increase design complexity and board area. | Choose only if lower tempco is prioritized and additional capacitor/layout overhead is acceptable. |
Compared with TL4050C20IDBZR and ADR3420ARJZ-R7, LM4050QBEM3-2.0/NOPB uniquely combines A-grade accuracy, AEC-Q100 Grade 1 qualification, no-output-capacitor operation, and 60 μA minimum current-making it the optimal choice for automotive and portable precision systems where reliability, size, and power are co-constrained.
Availability
LM4050QBEM3-2.0/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, automotive sensor conditioning, and energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QBEM3-2.0/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, embedded processing, and digital signal technologies, with decades of leadership in precision analog ICs.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, low-power, and automotive-grade applications-designed to replace discrete Zener + op-amp solutions with single-chip accuracy and stability.
FAQ
What is the maximum operating current for LM4050QBEM3-2.0/NOPB?
The LM4050QBEM3-2.0/NOPB supports a maximum operating current of 15 mA. This limit ensures safe junction temperature operation within its SOT-23 package under typical PCB mounting conditions. Exceeding 15 mA risks thermal overstress and permanent degradation of the LM4050QBEM3-2.0/NOPB's voltage regulation performance and long-term stability.
Does LM4050QBEM3-2.0/NOPB require an external output capacitor?
No, LM4050QBEM3-2.0/NOPB does not require an external output capacitor due to internal compensation. It remains stable with any capacitive load-including bypass, filtering, or ADC reference decoupling capacitors-eliminating a common BOM item and simplifying layout. The LM4050QBEM3-2.0/NOPB datasheet explicitly confirms capacitor-free operation as a core feature.
What temperature range is LM4050QBEM3-2.0/NOPB rated for?
LM4050QBEM3-2.0/NOPB is rated for −40°C to 125°C ambient temperature, meeting AEC-Q100 Grade 1 automotive qualification. This extended range exceeds standard industrial specs (−40°C to 85°C) and enables reliable deployment in under-hood, motor control, and industrial edge environments where thermal stress is severe.
How does the 2.048 V output of LM4050QBEM3-2.0/NOPB benefit ADC applications?
The 2.048 V output of LM4050QBEM3-2.0/NOPB aligns precisely with binary scaling: 2.048 V = 211 × 1 mV, enabling clean 1 mV LSB resolution for 11-bit converters and seamless integration with 12-bit systems using 2.5 V supplies. This eliminates gain-trimming components and improves system-level accuracy in LM4050QBEM3-2.0/NOPB-based data acquisition designs.
Is pin 3 of LM4050QBEM3-2.0/NOPB connected internally?
No, pin 3 of LM4050QBEM3-2.0/NOPB is NC (no internal connection). TI's datasheet mandates that it be left floating or tied to pin 2 (anode) to prevent EMI coupling in high-noise environments such as automotive or industrial settings. Connecting pin 3 elsewhere may compromise LM4050QBEM3-2.0/NOPB stability or EMC performance.
LM4050QBEM3-2.0/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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QBEM3-2.0/NOPB FAQ
1.How can I place an order for LM4050QBEM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QBEM3-2.0/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 LM4050QBEM3-2.0/NOPB reliable?
The price and inventory of LM4050QBEM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QBEM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QBEM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QBEM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QBEM3-2.0/NOPB?
LM4050QBEM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QBEM3-2.0/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 LM4050QBEM3-2.0/NOPB?
For technical support, including LM4050QBEM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QBEM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050QBEM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QBEM3-2.0/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 LM4050QBEM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QBEM3-2.0/NOPB?
All LM4050QBEM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QBEM3-2.0/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 LM4050QBEM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QBEM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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