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Texas Instruments LM4050QBEM3X2.0/NOPB
- Part No.:
- LM4050QBEM3X2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QBEM3X2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,464
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Product details
Overview
LM4050QBEM3X2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 2.048 V reverse breakdown voltage with ±0.1% (A-grade) initial tolerance at 25°C, 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 −40°C to 125°C extended temperature range - ideal for high-resolution 12-bit ADC biasing in portable instrumentation.
For engineers reviewing the LM4050QBEM3X2.0/NOPB datasheet, LM4050QBEM3X2.0/NOPB pinout, LM4050QBEM3X2.0/NOPB application, or LM4050QBEM3X2.0/NOPB equivalent, key selection criteria include output voltage stability under capacitive loads, zero-output-capacitor operation, thermal hysteresis ≤0.7 mV, low dynamic impedance (0.3 Ω), and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4050QBEM3X2.0/NOPB implements a curvature-corrected bandgap reference architecture with Zener-zap trim at wafer sort, enabling ±0.1% accuracy without external feedback. Its internal compensation eliminates need for output capacitance while maintaining stability across all capacitive loads.
As a two-terminal shunt device, it regulates voltage between cathode and anode via controlled reverse current; minimum operating current is 60 μA (typical) at 25°C, rising to 65 μA over −40°C to 125°C, with dynamic impedance of 0.3 Ω at 1 mA and 120 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - enables exact 1 mV LSB scaling for 12-bit systems powered from 3.3 V or 5 V rails. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - ensures <±2.05 mV absolute error before temperature or aging effects. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C - contributes ≤±10.2 mV drift across full range, critical for metering accuracy. |
| Noise (10 Hz–10 kHz) | 41 μVrms typical - limits added uncertainty to <0.02 LSB in 12-bit 2.048 V full-scale conversions. |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and high-current precision DAC references. |
| Thermal Hysteresis | 0.7 mV max (−40°C ↔ 125°C cycling) - ensures repeatable 25°C voltage after environmental stress, vital for calibration stability. |
| Dynamic Impedance | 0.3 Ω at 1 mA / 120 Hz - maintains regulation accuracy despite load transients up to ~15 mA. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed die attach pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input & voltage sensing node | Receives total current (IQ + IL) from series resistor; voltage regulated relative to Anode. |
| Anode (Pin 2) | Reference ground return | Common connection point for load and series resistor; must be tied to system ground for stable regulation. |
| NC (Pin 3) | No internal connection | Die attach interface contact; must be left floating or tied to Pin 2 per TI layout guidance to avoid EMI coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for stability with any capacitive load - eliminates BOM cost and board space for bypass caps. |
| Fixed 2.048 V output | Exact match for 12-bit ADC/DAC full-scale with 1 mV LSB - avoids resistor-divider errors and trimming effort. |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (−40°C to 125°C) and reliability requirements - suitable for ADAS sensor modules. |
| Low micropower operation | 60 μA minimum cathode current - enables battery life extension in portable multimeters and handheld test gear. |
| Stable under EMI | Pin 3 (NC) grounding recommendation mitigates high-frequency noise coupling - improves reference integrity near switching regulators. |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
|
Use Scenario: Handheld digital multimeter with 12-bit SAR ADC sampling 3.3 V rail. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.048 V reference for ADC conversion. Use Value: Enables true 1 mV resolution without trimming; 41 μVrms noise adds <0.02 LSB uncertainty. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA loop signals. IC Role / Device Role / Timing Role: Precision bias source for op-amp signal conditioning and ADC reference. Use Value: 50 ppm/°C tempco ensures <±10.2 mV drift over −40°C to 85°C operating range, meeting Class 0.1 accuracy. |
| Automotive Sensor Calibration | Energy Meter Reference |
|
Use Scenario: Tire pressure monitoring system (TPMS) ECU performing on-board sensor self-calibration. IC Role / Device Role / Timing Role: Stable reference for ratiometric ADC reading pressure transducer bridge output. Use Value: AEC-Q100 Grade 1 rating and 0.7 mV thermal hysteresis ensure repeatable calibration across thermal cycles. |
Use Scenario: Smart electricity meter using 24-bit sigma-delta ADC for revenue-grade kWh measurement. IC Role / Device Role / Timing Role: Low-noise, low-drift reference for metrology ADC front-end. Use Value: 120 ppm long-term stability (1000 hrs) and ±0.1% initial tolerance support IEC 62053-21 Class 0.2 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048 V, ±0.2% initial tolerance, 50 ppm/°C, 25 μVrms noise, SOT-23, but requires 1 μF output capacitor for stability. | Lower noise but higher minimum load current (50 μA vs 60 μA); less tolerant of PCB layout parasitics without capacitor. | Prefer REF3020AIDBZR only when ultra-low noise dominates and capacitor placement is feasible. |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% initial tolerance, 30 ppm/°C, 35 μVrms noise, SOT-23, but rated only for −40°C to +125°C industrial grade (not AEC-Q100). | Lacks automotive qualification; tighter tempco but higher cost; no NC pin - simpler layout but less EMI resilience. | Select ADR3420ARJZ-R7 for non-automotive high-precision apps where thermal drift is primary concern and AEC-Q100 is unnecessary. |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, LM4050QBEM3X2.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, capacitor-free operation, and 0.7 mV thermal hysteresis - making it optimal for automotive and portable calibration-critical designs where layout simplicity and repeatability are mandatory.
Availability
LM4050QBEM3X2.0/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, automotive sensor calibration, and energy meter reference applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QBEM3X2.0/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-qualified components.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, high-accuracy systems - designed specifically for battery-operated test equipment, automotive sensors, and metrology-grade energy monitoring.
FAQ
What is the maximum operating current for LM4050QBEM3X2.0/NOPB?
The LM4050QBEM3X2.0/NOPB supports a maximum operating current of 15 mA. This limit ensures safe power dissipation within the SOT-23 package's thermal constraints (287 °C/W junction-to-ambient resistance) and prevents junction temperature exceedance beyond 150 °C. Exceeding 15 mA risks permanent damage per absolute maximum ratings.
Does LM4050QBEM3X2.0/NOPB require an external output capacitor?
No, LM4050QBEM3X2.0/NOPB does not require an external output capacitor due to internal compensation. It remains stable with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks. Adding a capacitor is optional and does not degrade performance.
Is LM4050QBEM3X2.0/NOPB qualified for automotive applications?
Yes, LM4050QBEM3X2.0/NOPB is LM4050-N-Q1 variant and AEC-Q100 Grade 1 qualified, rated for operation from −40°C to +125°C ambient temperature. It undergoes automotive-grade manufacturing flow and reliability testing, making it suitable for engine control, ADAS, and body electronics.
What is the thermal hysteresis specification for LM4050QBEM3X2.0/NOPB?
The thermal hysteresis of LM4050QBEM3X2.0/NOPB is 0.7 mV maximum, measured as the voltage shift at 25°C after cycling between −40°C and +125°C. This parameter reflects mechanical stress-induced drift in the package and is critical for applications requiring repeatable calibration after thermal exposure.
How does the 2.048 V output of LM4050QBEM3X2.0/NOPB benefit 12-bit data converters?
The 2.048 V output of LM4050QBEM3X2.0/NOPB yields exactly 1 mV per LSB in a 12-bit system (2.048 V ÷ 4096 = 1 mV), eliminating scaling errors from resistor dividers and simplifying firmware calibration. Combined with ±0.1% initial tolerance, it ensures absolute accuracy better than ±2.05 mV at room temperature.
LM4050QBEM3X2.0/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
LM4050QBEM3X2.0/NOPB FAQ
1.How can I place an order for LM4050QBEM3X2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QBEM3X2.0/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 LM4050QBEM3X2.0/NOPB reliable?
The price and inventory of LM4050QBEM3X2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QBEM3X2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QBEM3X2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QBEM3X2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QBEM3X2.0/NOPB?
LM4050QBEM3X2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QBEM3X2.0/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 LM4050QBEM3X2.0/NOPB?
For technical support, including LM4050QBEM3X2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QBEM3X2.0/NOPB requirements.
6.How does Aetrix verify that LM4050QBEM3X2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QBEM3X2.0/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 LM4050QBEM3X2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QBEM3X2.0/NOPB?
All LM4050QBEM3X2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QBEM3X2.0/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 LM4050QBEM3X2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QBEM3X2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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