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Texas Instruments TL4050B50QDBZR
- Part No.:
- TL4050B50QDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050B50QDBZR.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,085
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Product details
Overview
TL4050B50QDBZR from Texas Instruments is a precision micropower shunt voltage reference with 5.0V nominal output, ±0.2% initial tolerance (max), 50ppm/°C temperature coefficient (max), 93μVRMS wideband noise, and operation across –40°C to 125°C. It serves as a stable voltage reference in high-accuracy data acquisition systems requiring low drift and minimal power.
For engineers reviewing the TL4050B50QDBZR datasheet, TL4050B50QDBZR pinout, TL4050B50QDBZR application, or TL4050B50QDBZR equivalent, key selection criteria include extended-temperature stability, cathode current range (74μA to 15mA), dynamic impedance (0.5Ω), thermal hysteresis (1.4mV), and SOT-23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The TL4050B50QDBZR operates as a two-terminal shunt reference, sinking current through its cathode to maintain a precise 5.0V reverse breakdown voltage across anode–cathode terminals. Its internal bandgap architecture delivers low temperature drift and stable output under varying load and supply conditions.
It requires no external capacitor for stability and remains functional with all capacitive loads. The device achieves 0.5Ω dynamic impedance at 1mA and maintains long-term stability of 120ppm over 1000 hours, supporting high-reliability industrial and automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V nominal at 100μA cathode current - sets ADC/DAC full-scale reference point with minimal calibration overhead |
| Initial Tolerance | ±0.2% max at 25°C - enables 12-bit system accuracy without trimming in production |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C - ensures ≤0.6% total drift across full operating range |
| Noise (10Hz–10kHz) | 93μVRMS - supports 16-bit resolution in low-noise sensor front-ends without added filtering |
| Dynamic Impedance | 0.5Ω at 1mA - minimizes output voltage shift under dynamic load transients |
| Min Cathode Current | 74μA typical at 25°C - allows ultra-low-power operation in battery-powered monitoring nodes |
| Operating Temp Range | –40°C to 125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
SOT-23-3 package (DBZ) with gull-wing leads; compact 2.92mm × 1.3mm footprint and 1.0mm height suitable for dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Connected to system ground; forms return path for cathode current and defines voltage reference baseline |
| Cathode (Pin 2) | Output voltage terminal | Sinks current to maintain 5.0V across anode–cathode; connects to ADC VREF, DAC REF, or feedback network |
| NC / Floating (Pin 3) | Not connected | Internally unconnected; must remain floating or tied to Pin 2 per TI design guidance to avoid parasitic Schottky conduction |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output bypass capacitor - reduces BOM count and layout area in portable designs |
| Low 93μVRMS noise | Enables direct interface to 16-bit SAR ADCs without external noise filtering components |
| Extended temperature range | –40°C to 125°C operation supports automotive engine control units and industrial motor drives |
| 0.5Ω dynamic impedance | Minimizes voltage droop during fast load steps - critical for multiplexed data acquisition systems |
| 74μA minimum cathode current | Permits use in energy-harvesting sensors where supply current is limited to <100μA |
Applications
| Data-Acquisition Systems | Automotive Electronics |
|---|---|
Use Scenario: High-resolution analog input module in programmable logic controller (PLC) with 16-bit ADC sampling multiple RTD and thermocouple channels. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion, defining full-scale range and offset stability. Use Value: ±0.2% tolerance and ±50ppm/°C drift ensure <0.1% total error across industrial temperature range without recalibration. |
Use Scenario: Battery management system (BMS) cell-voltage monitor in electric vehicle traction battery pack. IC Role / Device Role / Timing Role: Reference source for isolated sigma-delta ADC measuring 2.5–5.0V cell voltages. Use Value: 125°C rating and 120ppm long-term stability support 15-year automotive lifecycle requirements. |
| Process Controls | Battery-Powered Equipment |
Use Scenario: 4–20mA transmitter with HART communication in chemical plant pressure transmitters. IC Role / Device Role / Timing Role: Precision reference for DAC generating loop current setpoint and internal diagnostics. Use Value: Low 93μVRMS noise prevents signal corruption in HART frequency-shift keying (FSK) overlay. |
Use Scenario: Portable gas detector using electrochemical sensor with low-power microcontroller and 12-bit ADC. IC Role / Device Role / Timing Role: Shunt reference biased from LDO output, enabling sleep-mode current <100μA. Use Value: 74μA min cathode current allows continuous reference operation during 99% duty-cycle sleep cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050A50QDBZR | ±0.1% initial tolerance vs. ±0.2%; same tempco, noise, and package | Required where 16-bit system accuracy demands tighter initial error budget | Select when calibration cost exceeds $0.15/unit or field recalibration is impractical |
| REF3050AIDBZR | Series topology; 5.0V output; ±0.2% tolerance; 50ppm/°C; higher quiescent current (45μA vs. 74μA min) | Requires input voltage >5.3V; unsuitable for low-dropout shunt configurations | Choose only if system already uses series references and board layout cannot accommodate shunt topology |
Compared with TL4050A50QDBZR, the TL4050B50QDBZR trades 0.1% initial accuracy for lower cost while retaining identical thermal performance and noise; versus REF3050AIDBZR, it offers true shunt operation with no minimum input headroom but requires external current-setting resistor.
Availability
TL4050B50QDBZR is available at Aetrix Electronics and suitable for data-acquisition systems, automotive electronics, and process controls requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TL4050B50QDBZR 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 delivering analog and embedded processing solutions, with leadership in precision analog ICs and broad industrial portfolio coverage.
The TL4050 series belongs to TI's precision voltage reference product line, engineered for high-accuracy, low-power, and extended-temperature applications in measurement, control, and sensing systems.
FAQ
What is the operating temperature range of the TL4050B50QDBZR?
The TL4050B50QDBZR is characterized for operation from –40°C to +125°C ambient temperature. This extended range is explicitly defined in Section 5.9 of the datasheet for the Q-grade variant and qualifies the device for under-hood automotive, industrial motor control, and outdoor infrastructure applications where thermal stress exceeds standard industrial limits.
Does the TL4050B50QDBZR require an output capacitor?
No, the TL4050B50QDBZR does not require an output capacitor for stability. As confirmed in Section 8.1 and the Description section, it is designed to remain stable with all capacitive loads - including zero capacitance - eliminating the need for external bypass components and simplifying layout in space-constrained designs.
What is the minimum cathode current required for regulation in TL4050B50QDBZR?
The TL4050B50QDBZR requires a minimum cathode current of 74μA (typical) at 25°C, rising to 90μA maximum across –40°C to 125°C per Section 5.9. This value defines the lowest bias current that sustains regulation; below this, output voltage deviates outside specified tolerance.
How does the TL4050B50QDBZR differ from the TL4050B50IDBZR?
The TL4050B50QDBZR is rated for –40°C to 125°C operation, while the TL4050B50IDBZR is limited to –40°C to 85°C. Electrical specifications including tolerance, tempco, noise, and dynamic impedance are identical between grades; only temperature qualification differs, making Q-grade mandatory for high-ambient applications.
What is the thermal hysteresis specification for TL4050B50QDBZR?
The TL4050B50QDBZR exhibits 1.4mV thermal hysteresis, defined as the difference in 25°C output voltage after cycling to –40°C versus after cycling to 125°C (Section 5.9, VHYST parameter). This low hysteresis supports repeatable measurements in systems undergoing repeated thermal cycling.
TL4050B50QDBZR 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050B50QDBZR FAQ
1.How can I place an order for TL4050B50QDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050B50QDBZR 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 TL4050B50QDBZR reliable?
The price and inventory of TL4050B50QDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B50QDBZR is usually 5 days.
3.What payment methods are accepted for TL4050B50QDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050B50QDBZR transactions.
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4.How is shipping managed for TL4050B50QDBZR?
TL4050B50QDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050B50QDBZR 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 TL4050B50QDBZR?
For technical support, including TL4050B50QDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B50QDBZR requirements.
6.How does Aetrix verify that TL4050B50QDBZR is sourced from the original manufacturer or authorized distributors?
All TL4050B50QDBZR 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 TL4050B50QDBZR meets industry standards.
7.What is the process for return or replacement of TL4050B50QDBZR?
All TL4050B50QDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B50QDBZR, 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 TL4050B50QDBZR part is unused and in its original packaging.
Return procedure for TL4050B50QDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050B50QDBZR Tags
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TL431BQDBZR
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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