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Texas Instruments LM4050QBEM3-2.5/NOPB
- Part No.:
- LM4050QBEM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QBEM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,206
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Product details
Overview
LM4050QBEM3-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.500 V ±2.5 mV (A-grade, 25°C), with 41 μVrms wideband noise (10 Hz–10 kHz), 50 ppm/°C max temperature coefficient, and stable operation from 60 μA to 15 mA over −40°C to 125°C. It serves as a low-drift, low-noise reference for high-resolution ADCs, battery-powered instrumentation, and automotive sensor signal chains.
For engineers reviewing the LM4050QBEM3-2.5/NOPB datasheet, LM4050QBEM3-2.5/NOPB pinout, LM4050QBEM3-2.5/NOPB application, or LM4050QBEM3-2.5/NOPB equivalent, key selection criteria include initial tolerance at 25°C, thermal hysteresis (0.7 mV), dynamic impedance (0.3 Ω), long-term stability (120 ppm), and compatibility with capacitive loads without external compensation.
Technical Context
The LM4050QBEM3-2.5/NOPB implements a curvature-corrected bandgap architecture with Zener-zap trim for ±0.1% initial accuracy, enabling stable reverse breakdown regulation between cathode and anode terminals. Its internal compensation eliminates need for output capacitance while tolerating arbitrary capacitive loading.
It operates exclusively in closed-loop shunt mode: regulation depends on externally set cathode current (IR) via series resistor RS, with minimum IRMIN = 60 μA (25°C) and maximum IR = 15 mA. The device is AEC-Q100 Grade 1 qualified and supports both industrial (−40°C to 85°C) and extended (−40°C to 125°C) temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±2.5 mV at 100 μA, 25°C - enables 1 mV LSB matching for 12-bit systems with 5 V supply |
| Initial Tolerance | ±0.1% (A grade) - guarantees ≤±2.5 mV deviation at room temperature without calibration |
| Temp Coefficient | ≤50 ppm/°C (−40°C to 125°C) - limits drift to ±0.3125 mV across full range |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz) - preserves SNR in precision data acquisition front-ends |
| Dynamic Impedance | 0.3 Ω at 1 mA - ensures minimal load-induced voltage shift under varying current |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensing and high-current reference buffering |
| Thermal Hysteresis | 0.7 mV (−40°C ↔ 125°C cycling) - defines repeatability error after environmental stress |
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 / voltage regulation node | Accepts input current (IR) and sets regulated VOUT = 2.5 V relative to Anode; must be driven through external RS |
| Anode (Pin 2) | Reference ground / common return | Connected to system ground; forms reference potential for cathode voltage; all specs referenced to this node |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 per TI recommendation - prevents EMI coupling in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.5 V output | Eliminates external feedback resistors and associated layout sensitivity in space-constrained designs |
| No output capacitor required | Internally compensated for stability - reduces BOM count and PCB area vs. traditional shunt references |
| Tolerates capacitive loads | Enables direct decoupling at point-of-load without risk of oscillation or phase margin loss |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications requiring operation up to +125°C ambient and robust reliability |
| Zener-zap voltage trim | Ensures ±0.1% initial accuracy at wafer sort - avoids post-package calibration and improves yield |
Applications
| Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter or handheld data logger powered by coin cell or Li-ion battery. IC Role / Device Role / Timing Role: Precision 2.5 V reference for 16-bit SAR ADC and analog front-end gain stages. Use Value: Enables <1 LSB integral nonlinearity error over battery discharge (2.7–3.6 V), leveraging 60 μA min operating current and low dropout behavior. | Use Scenario: Engine control unit (ECU) measuring exhaust gas oxygen or manifold pressure. IC Role / Device Role / Timing Role: Stable reference for ratiometric sensor excitation and ADC conversion in harsh under-hood environment. Use Value: Maintains ≤±0.3125 mV output shift across −40°C to +125°C ambient, meeting ASIL-B functional safety requirements. |
| Industrial Process Monitoring | Precision Audio DAC Reference |
Use Scenario: 4–20 mA loop-powered transmitter for temperature or flow measurement. IC Role / Device Role / Timing Role: Shunt reference establishing precise 2.5 V基准 for current-sense amplifier and microcontroller ADC. Use Value: Delivers 41 μVrms noise floor and 0.7 mV thermal hysteresis - critical for sub-0.1% accuracy over field lifetime. | Use Scenario: High-fidelity audio DAC board requiring ultra-low-noise analog voltage reference. IC Role / Device Role / Timing Role: Low-noise 2.5 V reference for DAC internal buffer and external op-amp stage. Use Value: 41 μVrms wideband noise directly translates to >108 dB SNR, preserving 24-bit DAC resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | 2.5 V, ±0.2% initial accuracy, 50 ppm/°C TC, 42 μVrms noise, SOT-23, but requires ≥100 nF output capacitor for stability | Not suitable where capacitor-free operation is mandatory; higher min current (100 μA) | Select REF3025AIDBZR only if board layout allows dedicated bypass cap and higher quiescent current is acceptable |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% initial accuracy, 30 ppm/°C TC, 35 μVrms noise, SOT-23, but is series (not shunt) topology requiring separate ground path | Cannot replace shunt configuration without circuit redesign; incompatible with classic RS-based current sourcing | Choose ADR3425ARJZ-R7 only when migrating to series reference architecture with dedicated supply rail |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, LM4050QBEM3-2.5/NOPB uniquely combines capacitor-free shunt operation, AEC-Q100 qualification, and guaranteed 60 μA minimum current - making it the only drop-in option for legacy shunt-regulator designs targeting automotive or ultra-low-power industrial use.
Availability
LM4050QBEM3-2.5/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, and industrial process monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QBEM3-2.5/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 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 voltage references optimized for space-constrained, high-accuracy applications including automotive sensors, portable test equipment, and industrial control systems.
FAQ
What is the maximum operating current for LM4050QBEM3-2.5/NOPB?
The LM4050QBEM3-2.5/NOPB supports a maximum operating current of 15 mA. Exceeding this value risks exceeding the absolute maximum power dissipation limit of 280 mW at 25°C ambient, potentially causing thermal runaway or accelerated parametric drift. Designers must size the series resistor RS to ensure cathode current remains within 60 μA–15 mA across all supply and load conditions. This range is explicitly validated in TI's Electrical Characteristics table for the 2.5 V option.
Does LM4050QBEM3-2.5/NOPB require an external output capacitor?
No, LM4050QBEM3-2.5/NOPB does not require an external output capacitor due to internal compensation. Its design maintains stability with any capacitive load, including direct connection to ADC reference inputs or op-amp buffers. While a bypass capacitor may be added for additional high-frequency filtering, it is never necessary for stability - a key differentiator from most competing shunt references like REF3025AIDBZR.
What is the thermal hysteresis specification for LM4050QBEM3-2.5/NOPB?
The thermal hysteresis of LM4050QBEM3-2.5/NOPB is 0.7 mV, measured as the voltage difference at 25°C before and after cycling between −40°C and +125°C. This parameter reflects mechanical stress-induced shifts in the silicon die and package interface, and is critical for applications requiring repeatable measurements after environmental exposure - such as automotive diagnostic tools or field-deployed calibration equipment.
Is LM4050QBEM3-2.5/NOPB qualified for automotive applications?
Yes, LM4050QBEM3-2.5/NOPB is AEC-Q100 Grade 1 qualified, meaning it is certified for automotive use with guaranteed operation from −40°C to +125°C ambient temperature and validated reliability for engine control, body electronics, and ADAS subsystems. The "Q" in the part number explicitly denotes the automotive-grade variant, distinct from the industrial-only LM4050AIM3-2.5/NOPB.
What is the minimum cathode current needed for regulation in LM4050QBEM3-2.5/NOPB?
The minimum cathode current required for regulation in LM4050QBEM3-2.5/NOPB is 60 μA at 25°C, rising to 65 μA across the full −40°C to +125°C temperature range. This value is specified in Section 5.6 of the datasheet under "IRMIN" and must be maintained via proper RS sizing to ensure stable 2.5 V output under worst-case low-current conditions - especially critical in battery-powered sleep modes.
LM4050QBEM3-2.5/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:
- Active
- 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
LM4050QBEM3-2.5/NOPB FAQ
1.How can I place an order for LM4050QBEM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QBEM3-2.5/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 LM4050QBEM3-2.5/NOPB reliable?
The price and inventory of LM4050QBEM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QBEM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QBEM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QBEM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QBEM3-2.5/NOPB?
LM4050QBEM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QBEM3-2.5/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 LM4050QBEM3-2.5/NOPB?
For technical support, including LM4050QBEM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QBEM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050QBEM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QBEM3-2.5/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 LM4050QBEM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QBEM3-2.5/NOPB?
All LM4050QBEM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QBEM3-2.5/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 LM4050QBEM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050QBEM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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