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Texas Instruments TL4050B41QDBZT
- Part No.:
- TL4050B41QDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050B41QDBZT.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:325
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Product details
Overview
TL4050B41QDBZT from Texas Instruments is a precision micropower shunt voltage reference with a fixed 4.096V output, ±0.2% initial tolerance (B grade), 50ppm/°C max temperature coefficient, 93μVRMS wideband noise, and operation across –40°C to 125°C. It serves as a stable reference in high-resolution ADC/DAC circuits, battery-powered instrumentation, and automotive power-supply monitors.
For engineers reviewing the TL4050B41QDBZT datasheet, TL4050B41QDBZT pinout, TL4050B41QDBZT application, or TL4050B41QDBZT equivalent, key selection criteria include its extended-temperature shunt topology, low 68μA typical minimum cathode current, SOT-23-3 package compatibility, and absence of required output capacitance for stability.
Technical Context
The TL4050B41QDBZT operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 4.096V reverse breakdown voltage across its terminals. Its internal bandgap core delivers low dynamic impedance (0.5Ω at 1mA) and thermal hysteresis of 1.148mV over –40°C to 125°C cycling.
Designed for direct integration into voltage-divider or series-pass regulator feedback paths, it requires no external capacitor and remains stable with all capacitive loads. The device supports cathode currents from 68μA (min, full range) up to 15mA while maintaining specified accuracy and noise performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal - enables exact 1mV LSB resolution in 12-bit ADCs powered from 5V supplies. |
| Initial Tolerance | ±0.2% max at 25°C - defines maximum deviation before temperature or load effects, critical for calibration-critical systems. |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C - ensures ≤±0.25% output drift across full operating range. |
| Noise (10Hz–10kHz) | 93μVRMS typical - limits quantization uncertainty in precision data acquisition front-ends. |
| Min Cathode Current | 68μA typical (78μA max over temp) - sets minimum bias requirement for stable regulation in ultra-low-power designs. |
| Dynamic Impedance | 0.5Ω at 1mA - determines output voltage perturbation under fast load transients (e.g., SAR ADC sampling). |
| Operating Temp Range | –40°C to 125°C - qualifies for under-hood automotive, industrial process control, and energy metering applications. |
Pinout & Package
SOT-23-3 package (DBZ suffix), 2.92mm × 1.3mm footprint, 1.02mm height, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground terminal | Connected to system ground; forms return path for cathode current and defines 0V reference point. |
| Cathode (Pin 2) | Output voltage terminal | Delivers regulated 4.096V; sinks current from external supply through series resistor to maintain voltage setpoint. |
| 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 |
|---|---|
| Zero-output-capacitor stability | Eliminates BOM cost and board space for bypass caps while ensuring stability with any capacitive load. |
| Micropower operation | 68μA typical minimum cathode current enables >10-year battery life in portable gas sensors and IoT edge nodes. |
| Extended temperature rating | –40°C to 125°C qualification supports deployment in engine control units and solar inverters without derating. |
| Low thermal hysteresis | 1.148mV hysteresis after –40°C/125°C cycling preserves calibration integrity in cyclic thermal environments. |
| High ESD robustness | ±2000V HBM rating reduces handling sensitivity and field-failure risk during assembly and service. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: 12-bit SAR ADC (e.g., ADS7842) digitizing sensor signals in handheld test equipment. IC Role / Device Role / Timing Role: Provides 4.096V reference enabling 1mV LSB resolution with 5V digital supply. Use Value: Eliminates need for trimming or calibration due to ±0.2% tolerance and low 93μVRMS noise. | Use Scenario: Real-time monitoring of 12V automotive battery voltage with microcontroller ADC. IC Role / Device Role / Timing Role: Shunt reference in resistive divider feeding MCU analog input channel. Use Value: Stable 4.096V reference ensures ±10mV absolute accuracy over –40°C to 125°C ambient. |
| Automotive Electronics | Battery-Powered Equipment |
Use Scenario: Reference for fuel injector driver IC feedback loop in engine control module. IC Role / Device Role / Timing Role: Precision voltage setpoint for current-sense amplifier offset correction. Use Value: 50ppm/°C tempco prevents drift-induced torque miscalculation across under-hood thermal cycles. | Use Scenario: Calibration reference in portable multimeter measuring DC voltage ranges. IC Role / Device Role / Timing Role: Primary voltage standard for auto-ranging analog front-end. Use Value: Micropower operation extends alkaline battery life beyond 500 hours of active use. |
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%, 50ppm/°C, but 50μA min cathode current; SOT-23-3, same pinout. | Lower quiescent current enables tighter low-power budgets; slightly higher cost. | Select when <65μA total system current is mandatory and extended temp not required (–40°C to 85°C only). |
| MAX6008BEUR+T | 4.096V, ±0.2%, 75ppm/°C, 100μA min cathode current; SOT-23-3, same pinout. | Higher tempco and current limit reduce accuracy margin in wide-temp or ultra-low-power use cases. | Select for legacy MAXIM-based designs where second-source availability is prioritized over tempco or noise. |
Compared with REF3040AIDBZR and MAX6008BEUR+T, TL4050B41QDBZT offers superior thermal stability (50ppm/°C vs. 75ppm/°C) and lower noise (93μVRMS vs. 120μVRMS), making it optimal for 12-bit+ measurement systems operating across automotive temperature extremes.
Availability
TL4050B41QDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, automotive power-supply monitors, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
Supply support for TL4050B41QDBZT 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 automotive-grade components.
The TL4050 product line delivers micropower shunt references optimized for high-accuracy, low-drift applications in harsh environments-including automotive, industrial, and portable instrumentation-where size, power, and temperature resilience are critical.
FAQ
What is the guaranteed operating temperature range for TL4050B41QDBZT?
The TL4050B41QDBZT is characterized for continuous operation from –40°C to +125°C ambient temperature. This extended range is confirmed in Section 5.7 of the official TI datasheet (SLOS486B) and applies across all electrical specifications including tolerance, tempco, and noise performance.
Does TL4050B41QDBZT require an output capacitor for stability?
No, TL4050B41QDBZT does not require an output capacitor. As stated in Section 8.1 of the TI datasheet, it is designed to be stable with all capacitive loads and operates reliably without any external capacitor across cathode and anode terminals.
What is the minimum cathode current needed for TL4050B41QDBZT to regulate properly?
The TL4050B41QDBZT requires a minimum cathode current of 68μA typical at 25°C, rising to 78μA maximum across the full –40°C to 125°C range. This value is specified in Table 5.7 (TL4050x41Q Electrical Characteristics) and must be maintained for guaranteed 4.096V output accuracy.
How does the pin configuration of TL4050B41QDBZT differ from standard three-terminal references?
TL4050B41QDBZT uses a two-terminal shunt architecture in SOT-23-3: Pin 1 (Anode) = ground, Pin 2 (Cathode) = 4.096V output, and Pin 3 is internally unconnected. TI explicitly states Pin 3 must remain floating or tied to Pin 2 to prevent parasitic Schottky conduction (Section 8.2).
Can TL4050B41QDBZT replace TL4050B41IDBZT in existing designs?
Yes, TL4050B41QDBZT is a direct functional replacement for TL4050B41IDBZT with identical electrical specs and pinout, differing only in temperature rating: Q-grade supports –40°C to 125°C versus I-grade's –40°C to 85°C. No PCB or schematic changes are needed for upgrade to extended temperature operation.
TL4050B41QDBZT 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:
- ±0.2%
- 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
TL4050B41QDBZT FAQ
1.How can I place an order for TL4050B41QDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050B41QDBZT 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 TL4050B41QDBZT reliable?
The price and inventory of TL4050B41QDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B41QDBZT is usually 5 days.
3.What payment methods are accepted for TL4050B41QDBZT?
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4.How is shipping managed for TL4050B41QDBZT?
TL4050B41QDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050B41QDBZT 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 TL4050B41QDBZT?
For technical support, including TL4050B41QDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B41QDBZT requirements.
6.How does Aetrix verify that TL4050B41QDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050B41QDBZT 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 TL4050B41QDBZT meets industry standards.
7.What is the process for return or replacement of TL4050B41QDBZT?
All TL4050B41QDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B41QDBZT, 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 TL4050B41QDBZT part is unused and in its original packaging.
Return procedure for TL4050B41QDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050B41QDBZT Tags
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