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Texas Instruments TL4050B25QDBZT
- Part No.:
- TL4050B25QDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050B25QDBZT.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,178
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Product details
Overview
TL4050B25QDBZT from Texas Instruments is a precision 2.5V shunt voltage reference in SOT-23-3 package, rated for –40°C to 125°C operation, with ±0.2% initial tolerance (max), 50ppm/°C temperature coefficient, 41μVRMS wideband noise, and stable operation down to 60μA cathode current. It serves as a low-drift, micropower reference in high-accuracy analog signal chains.
For engineers reviewing the TL4050B25QDBZT datasheet, TL4050B25QDBZT pinout, TL4050B25QDBZT application, or TL4050B25QDBZT equivalent, key selection criteria include extended-temperature stability, shunt topology compatibility with capacitive loads, low-noise performance in battery-powered instrumentation, and direct replacement feasibility within the TL4050x25Q family.
Technical Context
The TL4050B25QDBZT implements a two-terminal shunt architecture requiring no external output capacitor and maintaining regulation across all capacitive load conditions. Its internal bandgap core delivers fixed 2.5V reverse breakdown voltage with dynamic impedance of 0.3Ω at 1mA, enabling tight regulation under varying load currents from 60μA to 15mA.
Characterized over –40°C to 125°C, it achieves ±50ppm/°C max temperature coefficient and 0.7mV thermal hysteresis, supporting high-reliability applications where long-term drift and thermal cycling stability are critical-such as automotive sensor interfaces and industrial process monitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V nominal; maintains accuracy across cathode current range and full temperature span. |
| Initial Tolerance | ±0.2% max at 25°C; enables 12-bit system accuracy without trimming in data acquisition. |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C; contributes ≤0.125% voltage shift across full range. |
| Noise (10Hz–10kHz) | 41μVRMS typical; supports low-noise ADC/DAC references in precision audio and instrumentation. |
| Cathode Current Range | 60μA to 15mA; allows ultra-low-power portable use and robust operation in high-current bias networks. |
| Dynamic Impedance | 0.3Ω at 1mA; ensures minimal load-induced voltage deviation in shunt regulator configurations. |
| Thermal Hysteresis | 0.7mV; guarantees repeatable 2.5V output after thermal cycling between –40°C and 125°C. |
Pinout & Package
SOT-23-3 package (DBZ) with standard pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC (no internal connection; must be left floating or tied to Pin 2 per TI recommendation due to parasitic Schottky diode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Reference output node | Connects to load and bias resistor; sinks current to maintain 2.5V; requires minimum 60μA for regulation. |
| Pin 2 (Anode) | Ground reference terminal | Common return path; ties to system ground; defines cathode-to-anode voltage drop. |
| Pin 3 (NC) | No internal connection | Must remain unconnected or shorted to Pin 2; not usable as signal or bypass terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output capacitor-reduces BOM count and PCB area in space-constrained designs. |
| Extended temperature rating | –40°C to 125°C operation enables use in under-hood automotive and industrial control environments. |
| Low micropower operation | 60μA min cathode current allows integration into battery-powered sensors and IoT edge nodes. |
| Low dynamic impedance | 0.3Ω ensures <1mV load regulation error even with 1mA load transients in precision measurement circuits. |
| Low wideband noise | 41μVRMS (10Hz–10kHz) supports high-resolution ADCs (≥16-bit ENOB) without external filtering. |
Applications
| Data-Acquisition Systems | Automotive Electronics |
|---|---|
Use Scenario: Reference for 12–16-bit SAR ADCs in portable multimeters and sensor data loggers. IC Role / Device Role / Timing Role: Provides stable 2.5V reference voltage for ADC full-scale calibration and ratiometric measurements. Use Value: Enables ±0.2% absolute accuracy without post-calibration, reducing test time and firmware complexity. | Use Scenario: Voltage reference in engine control unit (ECU) sensor signal conditioning for oxygen and pressure sensors. IC Role / Device Role / Timing Role: Supplies precision bias to op-amp front-ends operating across –40°C to 125°C ambient. Use Value: Maintains <0.125% total drift over temperature, ensuring consistent sensor linearity in emissions-critical systems. |
| Power-Supply Monitors | Battery-Powered Equipment |
Use Scenario: Feedback reference in isolated DC-DC converter secondary-side regulation loops. IC Role / Device Role / Timing Role: Shunt reference connected across optocoupler input to regulate output voltage via primary-side controller. Use Value: Stable 2.5V threshold enables ±1% output regulation across line/load/temperature without auxiliary winding. | Use Scenario: Reference for fuel gauging ICs and low-power microcontroller ADCs in medical wearables. IC Role / Device Role / Timing Role: Micropower shunt reference drawing only 60μA, extending battery life in coin-cell–powered devices. Use Value: Delivers 2.5V accuracy at sub-100μA currents, enabling >1-year runtime on CR2032 cells in continuous-sensing mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050A25QDBZT | ±0.1% initial tolerance (vs. ±0.2%); identical tempco, noise, and package. | Required where 16-bit system accuracy demands tighter initial error budget. | Select when long-term stability and lower initial error justify higher cost. |
| REF3025AIDBZR | Series topology; 2.5V output; ±0.2% tolerance; 50ppm/°C; but requires output capacitor and has higher quiescent current (45μA vs. 60μA min for TL4050). | Suitable for low-noise LDO-based references where supply headroom permits series configuration. | Choose only if system architecture mandates series reference and can accommodate required bypass capacitance. |
Compared with TL4050A25QDBZT, the TL4050B25QDBZT trades 0.1% initial accuracy for cost efficiency while retaining identical thermal performance and noise; versus REF3025AIDBZR, it offers shunt flexibility and capacitor-free operation but lacks series topology's inherent PSRR advantage.
Availability
TL4050B25QDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, automotive electronics, and battery-powered equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL4050B25QDBZT 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 industrial-grade components.
The TL4050 series is part of TI's precision voltage reference product line, designed specifically for high-accuracy, low-power, extended-temperature applications in instrumentation, automotive, and industrial control systems.
FAQ
What is the operating temperature range of the TL4050B25QDBZT?
The TL4050B25QDBZT is characterized for operation from –40°C to +125°C ambient temperature, making it suitable for under-hood automotive, industrial motor drives, and outdoor environmental monitoring systems where extreme thermal conditions are encountered. This extended range is confirmed in Section 5.5 of the official datasheet.
Does the TL4050B25QDBZT require an output capacitor?
No, the TL4050B25QDBZT does not require an output capacitor for stability-it is designed to remain stable with all capacitive loads, including zero capacitance. This eliminates BOM cost and PCB area in compact designs. Section 8.1 of the datasheet explicitly confirms this behavior.
What is the minimum cathode current needed for regulation in the TL4050B25QDBZT?
The TL4050B25QDBZT requires a minimum cathode current of 60μA (typical) at 25°C to maintain regulation, rising to 65μA across the full –40°C to 125°C range. This value is specified in Table 5.5 (TL4050x25Q Electrical Characteristics) and enables ultra-low-power operation in battery-backed systems.
How does the TL4050B25QDBZT compare to the TL4050B25IDBZT in terms of temperature rating?
The TL4050B25QDBZT is rated for –40°C to 125°C operation, whereas the TL4050B25IDBZT is limited to –40°C to 85°C. Both share identical electrical specifications (tolerance, noise, dynamic impedance), but the 'Q' suffix denotes the extended-temperature qualification required for automotive and harsh-environment applications.
What is the thermal hysteresis specification for the TL4050B25QDBZT?
The TL4050B25QDBZT exhibits 0.7mV thermal hysteresis-defined as the difference in 2.5V output measured at 25°C after cycling to –40°C versus after cycling to 125°C. This parameter ensures repeatability in systems subject to repeated thermal cycling, such as automotive ECUs and industrial PLCs.
TL4050B25QDBZT 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:
- Discontinued at Digi-Key
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050B25QDBZT FAQ
1.How can I place an order for TL4050B25QDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050B25QDBZT 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 TL4050B25QDBZT reliable?
The price and inventory of TL4050B25QDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B25QDBZT is usually 5 days.
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TL4050B25QDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050B25QDBZT 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 TL4050B25QDBZT?
For technical support, including TL4050B25QDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B25QDBZT requirements.
6.How does Aetrix verify that TL4050B25QDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050B25QDBZT 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 TL4050B25QDBZT meets industry standards.
7.What is the process for return or replacement of TL4050B25QDBZT?
All TL4050B25QDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B25QDBZT, 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 TL4050B25QDBZT part is unused and in its original packaging.
Return procedure for TL4050B25QDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050B25QDBZT Tags
-
TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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