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Texas Instruments TL4050A50QDBZT
- Part No.:
- TL4050A50QDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050A50QDBZT.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:361
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Product details
Overview
TL4050A50QDBZT from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 5.0V output with ±0.1% initial tolerance (max), 50ppm/°C temperature coefficient (max), 93μVRMS wideband noise, 0.5Ω dynamic impedance, 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 TL4050A50QDBZT datasheet, TL4050A50QDBZT pinout, TL4050A50QDBZT application, or TL4050A50QDBZT equivalent, this page provides verified specifications, SOT-23-3 terminal mapping, automotive-grade thermal performance, and validated alternative options for precision analog design.
Technical Context
The TL4050A50QDBZT operates as a two-terminal shunt reference, sinking cathode current (IZ) between 56μA min and 15mA max to maintain regulation. Its internal bandgap core achieves tight initial accuracy and low thermal drift via curvature-compensated design.
It requires no external capacitor for stability and remains functional with all capacitive loads. The device's low 93μVRMS noise and 0.5Ω dynamic impedance at 1mA support high-resolution ADC/DAC biasing in demanding signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V nominal; enables direct interface with 5V-supplied 12-bit ADCs achieving 1.22mV LSB resolution. |
| Initial Tolerance | ±0.1% max at 25°C; ensures ≤5mV absolute error without calibration in production test systems. |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C; contributes ≤0.6mV drift across full automotive temperature range. |
| Noise (10Hz–10kHz) | 93μVRMS typical; limits added noise to <0.02% of full-scale in 5V 16-bit SAR ADC applications. |
| Dynamic Impedance | 0.5Ω at 1mA; maintains <0.75mV output shift under 1.5mA load transients common in multiplexed sensor front-ends. |
| Min Cathode Current | 56μA typical at 25°C; supports ultra-low-power battery monitoring circuits with sub-100μA quiescent operation. |
| Operating Temp Range | –40°C to 125°C; qualified for under-hood automotive, industrial motor control, and energy metering environments. |
Pinout & Package
SOT-23-3 package (DBZ): compact 2.92mm × 1.3mm surface-mount outline with gull-wing leads, optimized for space-constrained PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Connected to system ground; forms return path for cathode current and defines 0V reference potential. |
| Cathode (Pin 2) | Regulated output node | Sinks adjustable current to maintain 5.0V across external load; connects to ADC VREF, DAC REF, or feedback divider. |
| NC / Floating (Pin 3) | Unused terminal | 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 need for external bypass capacitor-reduces BOM count and layout area in portable instrumentation. |
| Wide cathode current range | Operates from 56μA to 15mA-supports both microamp-level battery monitors and high-current precision regulators. |
| Low thermal hysteresis | 1.4mV max after –40°C/125°C cycling-ensures repeatable reference voltage in thermally cycled industrial controllers. |
| High ESD robustness | ±2000V HBM rating-survives handling in standard manufacturing without special ESD controls. |
| Long-term stability | 120ppm drift over 1000 hours-enables >10-year calibration intervals in utility metering and process control hardware. |
Applications
| Automotive Battery Monitoring | Industrial PLC Analog Input Modules |
|---|---|
Use Scenario: Real-time measurement of 12V lead-acid battery voltage in engine control units under wide ambient temperature swings. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0V reference for 12-bit ADC sampling battery voltage against varying supply rails. Use Value: ±0.1% tolerance and ±50ppm/°C drift ensure ≤15mV total error across –40°C to 125°C, meeting ISO 16750-4 requirements. |
Use Scenario: High-accuracy current/voltage sensing in programmable logic controller input cards with 4–20mA loop interfaces. IC Role / Device Role / Timing Role: Precision reference for sigma-delta ADCs converting sensor signals with <0.01% linearity error. Use Value: 93μVRMS noise and 0.5Ω dynamic impedance prevent reference-induced gain error in 16-bit measurements. |
| Portable Medical Instrumentation | Smart Energy Metering |
Use Scenario: Powering reference inputs of low-power ECG front-end amplifiers in handheld diagnostic devices. IC Role / Device Role / Timing Role: Micropower shunt reference enabling <100μA system standby current while maintaining ADC accuracy. Use Value: 56μA minimum cathode current allows operation from coin-cell batteries for >5 years in intermittent-use devices. |
Use Scenario: Providing reference voltage for polyphase electricity meter ICs measuring active/reactive power with Class 0.2 accuracy. IC Role / Device Role / Timing Role: Primary voltage reference for metrology-grade ADCs in revenue-grade billing meters. Use Value: 120ppm long-term stability and low thermal hysteresis meet IEC 62053-22 lifetime accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3050AIDBZR | 5.0V, ±0.2% initial tolerance, 50ppm/°C, 41μVRMS noise, SOT-23-3, but rated only for –40°C to 125°C with 100μA min cathode current. | Lacks A-grade 0.1% tolerance; higher noise floor unsuitable for 16-bit ADCs where 93μVRMS is acceptable. | Select when cost sensitivity outweighs need for 0.1% accuracy and lower noise is not required. |
| ADR3450ARJZ-R7 | 5.0V, ±0.1% initial tolerance, 30ppm/°C, 12μVRMS noise, SOT-23-5, requires 100μA min cathode current, and operates from –40°C to 125°C. | Lower noise and tighter tempco, but 5-pin package increases layout area and requires output capacitor for stability. | Choose for ultra-low-noise 18-bit+ systems where board space permits larger footprint and capacitor addition. |
Compared with TL4050A50QDBZT, REF3050AIDBZR trades 0.1% accuracy for lower cost and higher minimum current, while ADR3450ARJZ-R7 delivers superior noise and tempco at the expense of pin count, stability requirements, and footprint size.
Availability
TL4050A50QDBZT is available at Aetrix Electronics and suitable for automotive battery monitoring, industrial PLC analog input modules, and smart energy metering requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TL4050A50QDBZT 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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and automotive-qualified components.
The TL4050 series targets high-accuracy, low-power shunt references for data acquisition, industrial sensing, and automotive systems-designed to replace bulkier three-terminal references with simplified two-terminal operation.
FAQ
What is the operating temperature range of the TL4050A50QDBZT?
The TL4050A50QDBZT is characterized for operation from –40°C to 125°C, making it suitable for under-hood automotive applications, industrial motor drives, and outdoor energy infrastructure where extreme thermal environments are encountered. This extended range is confirmed in Section 5.9 of the official TI datasheet SLOS486B.
Does the TL4050A50QDBZT require an external output capacitor?
No, the TL4050A50QDBZT does not require an external output capacitor for stability-it is designed to remain stable with all capacitive loads. This eliminates the need for additional passive components in space-constrained designs such as portable medical devices and battery-powered sensors.
What is the minimum cathode current needed for regulation in the TL4050A50QDBZT?
The TL4050A50QDBZT requires a minimum cathode current of 56μA (typical) at 25°C and up to 90μA across the full –40°C to 125°C range to maintain regulation. This value is specified in Table 5.9 of the TI datasheet and enables ultra-low-power operation in always-on monitoring circuits.
How does the TL4050A50QDBZT compare to the TL4050A50IDBZT in terms of temperature rating?
The TL4050A50QDBZT is rated for –40°C to 125°C operation, whereas the TL4050A50IDBZT is limited to –40°C to 85°C. Both share identical electrical specs (5.0V, ±0.1%, 93μVRMS), but the "Q" suffix denotes automotive-grade qualification with extended thermal capability critical for engine control and powertrain modules.
Can the TL4050A50QDBZT be used as a replacement for the REF3050 in existing designs?
The TL4050A50QDBZT can serve as a functional alternative to the REF3050 in many shunt reference applications, but differences exist: TL4050A50QDBZT offers tighter initial tolerance (±0.1% vs ±0.2%) and lower minimum current (56μA vs 100μA), though REF3050 has lower noise (41μVRMS). Pin compatibility is maintained in SOT-23-3, but circuit validation is required due to differing dynamic impedance and load regulation behavior.
TL4050A50QDBZT 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:
- ±0.1%
- 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
TL4050A50QDBZT FAQ
1.How can I place an order for TL4050A50QDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050A50QDBZT 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 TL4050A50QDBZT reliable?
The price and inventory of TL4050A50QDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A50QDBZT is usually 5 days.
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TL4050A50QDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050A50QDBZT 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 TL4050A50QDBZT?
For technical support, including TL4050A50QDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A50QDBZT requirements.
6.How does Aetrix verify that TL4050A50QDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050A50QDBZT 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 TL4050A50QDBZT meets industry standards.
7.What is the process for return or replacement of TL4050A50QDBZT?
All TL4050A50QDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A50QDBZT, 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 TL4050A50QDBZT part is unused and in its original packaging.
Return procedure for TL4050A50QDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050A50QDBZT Tags
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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