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Texas Instruments TL4050B25IDBZT
- Part No.:
- TL4050B25IDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050B25IDBZT.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:650
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Product details
Overview
TL4050B25IDBZT from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 2.5 V output with ±0.2% initial tolerance (max), 50 ppm/°C temperature coefficient, 41 μVRMS wideband noise, and operation from 60 μA to 15 mA cathode current. It serves as a two-terminal voltage reference in high-accuracy analog signal chains, including data-acquisition systems and battery-powered instrumentation.
For engineers reviewing the TL4050B25IDBZT datasheet, TL4050B25IDBZT pinout, TL4050B25IDBZT application, or TL4050B25IDBZT equivalent, key selection criteria include its SOT-23-3 package, industrial temperature range (–40°C to +85°C), low dynamic impedance (0.3 Ω), thermal hysteresis (0.7 mV), and compatibility with all capacitive loads without requiring an output capacitor.
Technical Context
The TL4050B25IDBZT operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 2.5 V reverse breakdown voltage across its terminals. Its internal bandgap-derived structure ensures stability over temperature and load variations, with dynamic impedance of 0.3 Ω at 1 mA and low-noise performance optimized for high-resolution ADC/DAC biasing.
Designed for use in series with an external current-setting resistor, it functions across a wide cathode current range (60 μA to 15 mA) and remains stable under all capacitive loading conditions - eliminating need for output bypass capacitors. Thermal hysteresis is specified at 0.7 mV over –40°C to 125°C cycling, supporting reliable long-term accuracy in embedded measurement systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal; enables LSB-accurate scaling in 12-bit ADCs (e.g., 1 mV LSB with 4.096 V reference not applicable here, but 2.5 V supports 2.44 mV LSB in 10-bit systems) |
| Initial Tolerance | ±0.2% max at 25°C; guarantees absolute voltage error ≤ ±5 mV before temperature or aging effects |
| Temp Coefficient | 50 ppm/°C max over –40°C to +85°C; contributes ≤ ±4.25 mV drift across full industrial range |
| Noise (10 Hz–10 kHz) | 41 μVRMS; low enough to avoid degrading ENOB in 14-bit+ SAR ADCs when used as reference |
| Cathode Current Range | 60 μA to 15 mA; supports ultra-low-power sensor nodes (<100 μA system sleep current) and higher-drive applications |
| Dynamic Impedance | 0.3 Ω at 1 mA; minimizes load-induced voltage shift during fast transient current demands |
| Thermal Hysteresis | 0.7 mV over –40°C ↔ 125°C cycle; ensures repeatable voltage after thermal stress, critical for calibration-critical instruments |
Pinout & Package
SOT-23-3 package (DBZ): compact 2.92 mm × 1.3 mm surface-mount outline with gull-wing leads; rated for industrial temperature operation (–40°C to +85°C); JEDEC MO-178AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground terminal | Connected to system ground; forms return path for cathode current; must be low-impedance to avoid ground bounce errors |
| Cathode (Pin 2) | Output voltage node | Delivers regulated 2.5 V; sinks all operating current; requires external series resistor (RS) to set IZ |
| NC / Floating (Pin 3) | Not connected | Internally unconnected; must remain floating or tied to Pin 2 per TI guidance to avoid parasitic Schottky conduction |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Eliminates BOM cost and board space for output bypass caps while maintaining phase margin across all load capacitances |
| Micropower operation | 60 μA typical minimum cathode current enables use in energy-harvesting and coin-cell-powered devices |
| Low thermal hysteresis | 0.7 mV hysteresis ensures <0.03% repeatability after thermal cycling - essential for field-deployed test equipment |
| Wide current range | 15 mA max cathode current supports driving multiple parallel loads or low-impedance buffers without external amplification |
| Robust ESD rating | ±2000 V HBM protects against handling damage during manual assembly and board-level testing |
Applications
| Data-Acquisition Systems | Portable Instrumentation |
|---|---|
Use Scenario: 12-bit SAR ADC (e.g., ADS7842) in handheld multimeter with 3.3 V supply and battery-backed operation. IC Role / Device Role / Timing Role: Primary voltage reference establishing full-scale input range for analog front-end. Use Value: 2.5 V output enables direct ratiometric measurement; ±0.2% tolerance ensures <0.5 LSB absolute error at room temperature. |
Use Scenario: Battery-powered gas sensor module with microcontroller, analog signal conditioning, and BLE radio. IC Role / Device Role / Timing Role: Stable reference for sensor excitation and ADC conversion in low-duty-cycle wake-up mode. Use Value: 60 μA min cathode current allows reference to remain active during MCU sleep, reducing wake-up latency and calibration drift. |
| Industrial Process Monitoring | Automotive Body Control Units |
Use Scenario: 4–20 mA loop-powered transmitter measuring pressure/temperature in factory automation. IC Role / Device Role / Timing Role: Precision shunt reference for DAC-based current loop control and sensor offset trimming. Use Value: 50 ppm/°C tempco limits drift to <±0.425 mV over –40°C to +85°C, meeting SIL-2 functional safety margin requirements. |
Use Scenario: Cabin air quality sensor node inside vehicle dashboard, exposed to ambient temperature swings. IC Role / Device Role / Timing Role: Reference for NDIR CO₂ sensor amplifier and ADC in thermally stressed environment. Use Value: 0.7 mV thermal hysteresis prevents calibration drift after repeated hot/cold cycles - critical for long-term zero-point stability. |
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 tol, 50 ppm/°C, 22 μVRMS noise, 50 μA min IQ, SOT-23-3 | Lower noise (22 vs. 41 μVRMS) but narrower current range (50 μA–25 mA); no thermal hysteresis spec provided | Select REF3025AIDBZR for ultra-low-noise 16-bit+ data acquisition where hysteresis is secondary |
| MAX6002BESA+ | 2.5 V, ±0.2% initial tol, 75 ppm/°C, 35 μVRMS noise, 60 μA min IQ, SO-8 | SO-8 package (larger footprint); higher tempco (75 vs. 50 ppm/°C); same min current but lower max (10 mA) | Choose MAX6002BESA+ only if SO-8 layout reuse or legacy qualification is required; not drop-in compatible |
Compared with REF3025AIDBZR and MAX6002BESA+, TL4050B25IDBZT offers superior thermal hysteresis control (0.7 mV) and guaranteed stability with any capacitive load - making it preferred for field-deployed, recalibration-sensitive instrumentation where long-term repeatability outweighs marginal noise reduction.
Availability
TL4050B25IDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, portable instrumentation, and industrial process monitoring requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for TL4050B25IDBZT 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 headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and digital signal solutions for industrial, automotive, and consumer markets.
The TL4050 series belongs to TI's precision voltage reference product line, engineered specifically for high-accuracy, low-power, two-terminal shunt regulation in space-constrained and thermally variable environments.
FAQ
What is the operating temperature range for TL4050B25IDBZT?
The TL4050B25IDBZT is characterized for industrial temperature operation from –40°C to +85°C. This range is explicitly defined in the "Recommended Operating Conditions" section of the datasheet and applies to all electrical specifications unless otherwise noted. It does not support the extended –40°C to +125°C range offered by Q-grade variants like TL4050B25QDBZT.
Does TL4050B25IDBZT require an output capacitor?
No, TL4050B25IDBZT does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads, including 0 μF. Adding a capacitor is optional and may be used for additional noise filtering, but it introduces no risk of oscillation or phase-margin degradation - a key advantage over many series references.
What is the minimum cathode current needed for TL4050B25IDBZT to regulate properly?
The TL4050B25IDBZT requires a minimum cathode current of 60 μA (typical) and 65 μA (max over temperature) to maintain regulation within specification. Below this threshold, output voltage deviates beyond the ±0.2% tolerance band. The value is confirmed in Section 5.4 "TL4050x25I Electrical Characteristics" of the datasheet under IZ,min.
How does TL4050B25IDBZT compare to TL4050A25IDBZT in performance?
TL4050B25IDBZT has ±0.2% initial tolerance and 50 ppm/°C temperature coefficient - identical tempco but twice the initial error versus TL4050A25IDBZT (±0.1%). Both share identical noise (41 μVRMS), dynamic impedance (0.3 Ω), and thermal hysteresis (0.7 mV). TL4050B25IDBZT trades precision for cost-effectiveness in applications where ±0.2% meets system accuracy targets.
Can TL4050B25IDBZT be used in automotive applications?
TL4050B25IDBZT is qualified for industrial temperature range (–40°C to +85°C) and is not AEC-Q200 qualified. While it may function in non-safety-critical automotive cabin modules, TI recommends Q-grade variants (e.g., TL4050B25QDBZT) for under-hood or ASIL-compliant designs due to their extended –40°C to +125°C rating and automotive-specific qualification testing.
TL4050B25IDBZT 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050B25IDBZT FAQ
1.How can I place an order for TL4050B25IDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050B25IDBZT 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 TL4050B25IDBZT reliable?
The price and inventory of TL4050B25IDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B25IDBZT is usually 5 days.
3.What payment methods are accepted for TL4050B25IDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050B25IDBZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4050B25IDBZT?
TL4050B25IDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050B25IDBZT 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 TL4050B25IDBZT?
For technical support, including TL4050B25IDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B25IDBZT requirements.
6.How does Aetrix verify that TL4050B25IDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050B25IDBZT 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 TL4050B25IDBZT meets industry standards.
7.What is the process for return or replacement of TL4050B25IDBZT?
All TL4050B25IDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B25IDBZT, 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 TL4050B25IDBZT part is unused and in its original packaging.
Return procedure for TL4050B25IDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050B25IDBZT Tags
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TL431AIDBZR
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