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Texas Instruments LM4050QBEM3X5.0/NOPB
- Part No.:
- LM4050QBEM3X5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QBEM3X5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,587
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Product details
Overview
LM4050QBEM3X5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 5.0 V nominal reverse breakdown voltage with ±0.1% (A-grade) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to 125°C and requires no output capacitor-used in high-resolution ADC/DAC biasing, battery-powered instrumentation, and automotive sensor signal conditioning.
For engineers reviewing the LM4050QBEM3X5.0/NOPB datasheet, LM4050QBEM3X5.0/NOPB pinout, LM4050QBEM3X5.0/NOPB application, or LM4050QBEM3X5.0/NOPB equivalent, key selection criteria include guaranteed 5.0 V output accuracy across extended temperature range, low dynamic impedance (0.5 Ω), thermal hysteresis ≤1.4 mV, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4050QBEM3X5.0/NOPB implements a curvature-corrected bandgap shunt reference architecture with Zener-zap trim at wafer sort, enabling ±0.1% initial accuracy. Its internal compensation eliminates external capacitor requirements while maintaining stability under capacitive loads up to 10 nF.
It functions as a two-terminal device: cathode regulates voltage relative to anode (ground), with current-sourced operation requiring external series resistor (RS). Minimum operating current is 74 μA (typical) at 25°C, rising to 90 μA across −40°C to 125°C, and maximum reverse current is strictly limited to 15 mA to prevent junction overheating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage at 100 μA test current-enables LSB-matched 12-bit ADCs with 1.22 mV resolution when referenced to 5 V supply. |
| Initial Tolerance | ±0.1% (A grade) at 25°C-guarantees absolute output deviation ≤ ±5 mV before temperature or load effects. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C-limits worst-case drift to ±6.5 mV across full range, critical for metering and process control. |
| Noise (10 Hz–10 kHz) | 93 μVrms typical-low enough to avoid degrading ENOB in 16-bit SAR ADCs without additional filtering. |
| Dynamic Impedance | 0.5 Ω at 1 mA, 120 Hz-ensures <1 mV output shift under 1 mA load transients, supporting stable feedback in precision regulators. |
| Operating Current Range | 74 μA (min, −40°C to 125°C) to 15 mA (max)-supports ultra-low-power sensor nodes and robust industrial current-sourcing designs. |
| Thermal Hysteresis | ≤1.4 mV after −40°C ↔ 125°C cycling-minimizes calibration drift in field-deployed equipment subject to ambient cycling. |
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 connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage node | Connects to supply via series resistor (RS); voltage develops between this pin and anode-must sink all load + reference current. |
| Anode (Pin 2) | Reference ground / common return | Internally tied to substrate; must be connected to system ground-serves as voltage reference point for cathode regulation. |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 (anode); connecting to anode reduces EMI susceptibility in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive applications with operation from −40°C to 125°C and robust ESD immunity (±2 kV HBM). |
| No output capacitor required | Internally compensated design ensures stability with zero or any capacitive load-reduces BOM count and PCB area in space-constrained modules. |
| Fixed 5.0 V output option | Eliminates external resistor divider; enables direct interface with 5 V logic, 12-bit ADCs, and microcontroller VREF inputs. |
| Low micropower operation | 74 μA minimum operating current allows use in coin-cell–powered devices with multi-year battery life. |
| Stable under capacitive loads | Maintains regulation with up to 10 nF load capacitance-supports direct decoupling of downstream op-amps or ADC analog supplies. |
Applications
| Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Portable multimeter or handheld data logger powered by two AA cells, requiring stable 5 V reference for 16-bit ADC sampling. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 5.0 V bias to ADC's VREF pin, rejecting supply ripple and load-induced drift. Use Value: Enables ±0.1% measurement accuracy over temperature and battery discharge-no recalibration needed across 0–100% SOC. |
Use Scenario: Engine control unit (ECU) measuring exhaust gas oxygen concentration using a wideband lambda sensor. IC Role / Device Role / Timing Role: Precision 5.0 V reference for sensor excitation and ADC conversion in closed-loop air-fuel ratio control. Use Value: AEC-Q100 qualification and 50 ppm/°C tempco ensure consistent stoichiometric calculation across −40°C cold start to 125°C under-hood operation. |
| Energy Metering Front-End | Industrial Process Controller Analog Input |
|
Use Scenario: DIN-rail mounted electricity meter with Class 0.2 accuracy requirement, digitizing CT/PT outputs via 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Primary voltage reference for ADC reference path, directly tied to metrology SoC's external VREF. Use Value: 93 μVrms noise and <1.4 mV thermal hysteresis preserve effective resolution >21 bits-meets IEC 62053-21 linearity specs. |
Use Scenario: PLC analog input module converting 4–20 mA field signals to digital with 14-bit isolation and cold-junction compensation. IC Role / Device Role / Timing Role: Stable 5.0 V reference for precision current-to-voltage conversion and multiplexed ADC channel referencing. Use Value: 0.5 Ω dynamic impedance prevents gain error shift during channel switching transients-maintains <0.01% inter-channel matching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | ±0.5% initial tolerance (C grade), 100 ppm/°C max tempco, 100 μVrms noise-lower accuracy and higher drift than LM4050QBEM3X5.0/NOPB. | Acceptable for cost-sensitive industrial controls where ±0.5% system accuracy suffices; not qualified for automotive. | Select when budget constraints outweigh need for AEC-Q100 or sub-50 ppm/°C stability. |
| ADR3450ARJZ-R7 | Series reference (not shunt), 5.0 V output, ±0.1% tolerance, 10 ppm/°C max tempco, 8 μVrms noise-superior specs but requires higher quiescent current (100 μA min) and external bypass cap. | Suitable for low-noise, high-stability systems with available headroom for series topology; incompatible with shunt-based legacy layouts. | Choose only if redesign permits series topology and ultra-low noise (<10 μVrms) is mandatory-requires PCB layout change. |
Compared with TL4050C50IDBZR and ADR3450ARJZ-R7, the LM4050QBEM3X5.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, shunt topology compatibility, and ±0.1% accuracy in SOT-23-making it the only drop-in solution for automotive and industrial shunt-reference upgrades without layout revision.
Availability
LM4050QBEM3X5.0/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor signal conditioning, and energy metering front-end designs requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050QBEM3X5.0/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-grade components.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy applications-including automotive sensors, portable test equipment, and smart grid metering-where stability, low noise, and qualification rigor are non-negotiable.
FAQ
What is the guaranteed initial accuracy of LM4050QBEM3X5.0/NOPB at 25°C?
The LM4050QBEM3X5.0/NOPB is an A-grade device with guaranteed ±0.1% initial reverse breakdown voltage tolerance at 25°C, corresponding to ±5 mV absolute deviation from its 5.0 V nominal output. This specification is 100% production tested per TI's datasheet Section 5.8, and applies specifically to the LM4050QBEM3X5.0/NOPB variant with SOT-23 packaging and 5.0 V option.
Does LM4050QBEM3X5.0/NOPB require an external output capacitor for stability?
No, the LM4050QBEM3X5.0/NOPB is internally compensated and does not require an external output capacitor to maintain stability-even with capacitive loads up to 10 nF. This is confirmed in TI's datasheet Sections 3 and 7.3, and enables simplified layout in space-constrained applications. A bypass capacitor may be added for additional noise filtering but is not necessary for regulation integrity.
What is the minimum operating current for LM4050QBEM3X5.0/NOPB across its full temperature range?
The LM4050QBEM3X5.0/NOPB has a minimum operating current of 90 μA across the full −40°C to 125°C extended temperature range, as specified in Section 5.8 of the TI datasheet. At 25°C, the typical minimum is 74 μA, but design must accommodate the 90 μA worst-case value to ensure regulation under all conditions.
Is LM4050QBEM3X5.0/NOPB qualified for automotive applications?
Yes, the LM4050QBEM3X5.0/NOPB is the Q1 variant of the LM4050-N family and is explicitly AEC-Q100 Grade 1 qualified for automotive use. It meets stringent reliability, temperature, and ESD requirements-including operation from −40°C to 125°C ambient and ±2 kV HBM ESD rating-as documented in TI's official product folder and datasheet revision history.
How does the NC pin (Pin 3) of LM4050QBEM3X5.0/NOPB affect circuit performance?
Pin 3 of the LM4050QBEM3X5.0/NOPB is a no-connect terminal with no internal bond wire. TI recommends leaving it floating or connecting it directly to Pin 2 (anode) to reduce EMI susceptibility in high-noise environments such as near switching power supplies or motor drivers. Incorrect routing-e.g., tying it to voltage rails or leaving it unterminated near RF sources-can degrade noise immunity without affecting basic regulation.
LM4050QBEM3X5.0/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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 90 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QBEM3X5.0/NOPB FAQ
1.How can I place an order for LM4050QBEM3X5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QBEM3X5.0/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 LM4050QBEM3X5.0/NOPB reliable?
The price and inventory of LM4050QBEM3X5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QBEM3X5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QBEM3X5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QBEM3X5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QBEM3X5.0/NOPB?
LM4050QBEM3X5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QBEM3X5.0/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 LM4050QBEM3X5.0/NOPB?
For technical support, including LM4050QBEM3X5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QBEM3X5.0/NOPB requirements.
6.How does Aetrix verify that LM4050QBEM3X5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QBEM3X5.0/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 LM4050QBEM3X5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QBEM3X5.0/NOPB?
All LM4050QBEM3X5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QBEM3X5.0/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 LM4050QBEM3X5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QBEM3X5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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