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Texas Instruments TL4050A41QDBZT
- Part No.:
- TL4050A41QDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050A41QDBZT.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:339
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Product details
Overview
TL4050A41QDBZT from Texas Instruments is a precision micropower shunt voltage reference with 4.096V nominal output, ±4.1mV (±0.1%) initial tolerance at 25°C, 50ppm/°C max temperature coefficient, 93μVRMS wideband noise, and stable operation from –40°C to 125°C. It serves as a high-accuracy reference in 12-bit data-acquisition systems, battery-powered instrumentation, and automotive power-supply monitors.
For engineers reviewing the TL4050A41QDBZT datasheet, TL4050A41QDBZT pinout, TL4050A41QDBZT application, or TL4050A41QDBZT equivalent, this page delivers verified electrical characteristics, SOT-23-3 terminal mapping, thermal hysteresis (1.148mV), dynamic impedance (0.5Ω), and minimum cathode current (52μA typical) - all critical for low-power, high-stability analog design validation.
Technical Context
The TL4050A41QDBZT operates as a two-terminal shunt reference requiring no external capacitor for stability and supporting all capacitive loads. Its internal bandgap architecture delivers fixed 4.096V output with tight initial accuracy and low drift across temperature extremes.
It maintains regulation over a cathode current range of 52μA to 15mA, exhibits reverse dynamic impedance of 0.5Ω at 1mA, and achieves long-term stability of 120ppm after 1000 hours. Thermal hysteresis is specified at 1.148mV over –40°C to 125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal at IZ = 100μA, 25°C - enables exact 1mV LSB in 12-bit ADCs powered from 5V supplies |
| Initial Tolerance | ±4.1mV (±0.1%) at 25°C - meets A-grade precision for metrology-grade signal chains |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C - ensures ≤±0.5mV drift across full automotive temperature range |
| Noise (10Hz–10kHz) | 93μVRMS - supports high-resolution measurements without added filtering overhead |
| Min Cathode Current | 52μA typical - allows ultra-low-power operation in energy-harvesting and battery-backed systems |
| Dynamic Impedance | 0.5Ω at 1mA, 120Hz - minimizes load-induced output variation in varying-current applications |
| Thermal Hysteresis | 1.148mV - quantifies reversible voltage shift after thermal cycling, critical for repeatable calibration |
Pinout & Package
SOT-23-3 package (DBZ) with gull-wing leads; compact 2.92mm × 1.3mm footprint ideal for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Connected to load and external current-setting resistor; sinks total cathode current (IZ + IL) |
| Anode (Pin 2) | Ground reference terminal | Common return path; must be tied to system ground or low-impedance reference plane |
| NC / Floating (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to Pin 2 per TI recommendation 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 complexity in portable designs |
| Extended temperature range | –40°C to 125°C operation - qualified for under-hood automotive and industrial control environments |
| Low micropower consumption | 52μA typical minimum cathode current - extends battery life in wireless sensor nodes and handheld test gear |
| Low thermal hysteresis | 1.148mV - preserves measurement repeatability after thermal cycling in calibration-critical applications |
| High ESD robustness | ±2000V HBM rating - improves manufacturing yield and field reliability in handling-sensitive production lines |
Applications
| Data-Acquisition Systems | Automotive Power-Supply Monitors |
|---|---|
Use Scenario: 12-bit SAR ADC (e.g., ADS7842) in portable environmental sensor node. IC Role / Device Role / Timing Role: Precision 4.096V reference enabling 1mV LSB resolution with 5V supply. Use Value: Matches ADC full-scale range exactly, eliminating gain calibration and improving end-point accuracy by ≥0.1%. |
Use Scenario: Real-time monitoring of 12V battery and 5V rail voltage in ADAS ECU. IC Role / Device Role / Timing Role: Stable shunt reference for MCU ADC channel measuring regulated supply outputs. Use Value: Maintains <±0.5mV drift over –40°C to 125°C, ensuring reliable fault detection across vehicle lifetime. |
| Portable Instrumentation | Energy Management Systems |
Use Scenario: Handheld multimeter with auto-ranging analog front-end. IC Role / Device Role / Timing Role: Primary voltage reference for dual-slope integrator and scaling DACs. Use Value: 93μVRMS noise and 0.5Ω dynamic impedance prevent measurement noise floor elevation during range switching. |
Use Scenario: Smart meter voltage sensing in residential solar inverter interface. IC Role / Device Role / Timing Role: Reference for isolated sigma-delta ADC measuring grid AC voltage via resistive divider. Use Value: Long-term stability of 120ppm/1000h ensures >10-year calibration validity without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | 4.096V, ±0.2% initial tolerance, 50ppm/°C, SOT-23-3, but requires ≥100μA min cathode current | Higher minimum operating current limits use in sub-100μA ultra-low-power designs | Select when cost sensitivity outweighs micropower requirement and 0.2% tolerance is acceptable |
| ADR3440ARJZ-R7 | 4.096V, ±0.1% initial tolerance, 10ppm/°C max tempco, SC70-5, active quiescent current 120μA | Lower tempco but higher power and different package; not a direct drop-in replacement | Select when ultra-low drift (<10ppm/°C) is mandatory and board redesign for SC70-5 is feasible |
Compared with REF3040AIDBZR and ADR3440ARJZ-R7, the TL4050A41QDBZT uniquely combines A-grade 0.1% tolerance, 50ppm/°C tempco, 52μA min cathode current, and SOT-23-3 compatibility - making it optimal for cost-constrained, high-precision, extended-temperature shunt reference applications where minimal external components and proven automotive qualification matter.
Availability
TL4050A41QDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, automotive electronics, and portable instrumentation requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for TL4050A41QDBZT 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 delivering analog and embedded processing solutions with deep expertise in precision analog ICs and industrial-grade reliability.
The TL4050 series was designed specifically for high-accuracy, low-power shunt reference applications in harsh environments - targeting automotive, industrial, and portable instrumentation markets where stability, small size, and extended temperature operation are essential.
FAQ
What is the maximum cathode current rating for TL4050A41QDBZT?
The absolute maximum cathode current for TL4050A41QDBZT is 15mA, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent damage due to junction overheating. For reliable long-term performance, design cathode current within the recommended 52μA to 15mA range, with thermal derating applied above 85°C ambient.
Does TL4050A41QDBZT require an output capacitor for stability?
No, TL4050A41QDBZT does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads, including direct connection to ADC reference inputs or large bulk capacitance. Adding a capacitor is optional and only beneficial for additional high-frequency noise filtering - not for loop stability.
What is the thermal hysteresis specification for TL4050A41QDBZT?
The thermal hysteresis of TL4050A41QDBZT is 1.148mV, defined as the difference between the 25°C output voltage measured after cycling to –40°C versus after cycling to 125°C. This parameter quantifies reversible voltage shift due to mechanical stress in the die/package and is critical for applications demanding repeatable calibration after thermal excursions.
Can TL4050A41QDBZT be used in a 12-bit data-acquisition system?
Yes, TL4050A41QDBZT is explicitly designed for 12-bit data-acquisition systems. Its 4.096V output matches the full-scale range of 5V-supplied 12-bit ADCs (e.g., ADS7842), yielding exactly 1mV per LSB. Combined with ±0.1% initial tolerance and low noise (93μVRMS), it eliminates gain calibration and supports ±0.5LSB total error budgets.
What is the meaning of the 'Q' suffix in TL4050A41QDBZT?
The 'Q' suffix in TL4050A41QDBZT denotes qualification for the extended temperature range of –40°C to 125°C, meeting automotive-grade reliability requirements. This distinguishes it from 'I' grade parts rated only to 85°C. The 'Q' grade undergoes additional screening and characterization across the full –40°C to 125°C range, including parameters like thermal hysteresis and full-range tolerance.
TL4050A41QDBZT 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):
- 4.096V
- 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:
- 78 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050A41QDBZT FAQ
1.How can I place an order for TL4050A41QDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050A41QDBZT 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 TL4050A41QDBZT reliable?
The price and inventory of TL4050A41QDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A41QDBZT is usually 5 days.
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Once your TL4050A41QDBZT 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 TL4050A41QDBZT?
For technical support, including TL4050A41QDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A41QDBZT requirements.
6.How does Aetrix verify that TL4050A41QDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050A41QDBZT 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 TL4050A41QDBZT meets industry standards.
7.What is the process for return or replacement of TL4050A41QDBZT?
All TL4050A41QDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A41QDBZT, 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 TL4050A41QDBZT part is unused and in its original packaging.
Return procedure for TL4050A41QDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050A41QDBZT Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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