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Texas Instruments TL4051AIDBZT
- Part No.:
- TL4051AIDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4051AIDBZT.pdf
- Description:
- IC VREF SHUNT ADJ 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:662
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Product details
Overview
TL4051AIDBZT from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.1% initial accuracy (A grade), 50ppm/°C temperature coefficient, 20μVRMS wideband noise, and stable operation from 60μA to 12mA cathode current. It operates across –40°C to +85°C and is used in high-accuracy data acquisition, power supply monitoring, and portable instrumentation.
For engineers reviewing the TL4051AIDBZT datasheet, TL4051AIDBZT pinout, TL4051AIDBZT application, or TL4051AIDBZT equivalent, key selection criteria include initial voltage tolerance, thermal drift performance, low-noise operation at microamp bias currents, and compatibility with capacitive loads without external stabilization.
Technical Context
The TL4051AIDBZT implements a bandgap-based shunt reference architecture optimized for low quiescent current and minimal thermal hysteresis (0.36mV/V). Its dynamic impedance remains below 0.5Ω at 1mA, enabling stable regulation under varying load conditions.
It features a two-terminal configuration (cathode/anode) with no feedback pin-unlike adjustable variants-and requires no external capacitor for stability. The device maintains specified performance across its full industrial temperature range without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V at 100μA cathode current; enables direct replacement of legacy 1.2V references with tighter tolerance. |
| Initial Accuracy | ±0.1% max at 25°C; supports high-resolution ADC/DAC biasing where 1.225mV absolute error is acceptable. |
| Tempco | ±50ppm/°C max over –40°C to +85°C; ensures ≤0.62mV total drift across full operating range. |
| Noise (10Hz–10kHz) | 20μVRMS typical; suitable for precision analog front-ends requiring sub-LSB noise contribution in 16-bit+ systems. |
| Cathode Current Range | 60μA (typ) to 12mA; allows use in ultra-low-power sensor nodes (<100μA system budget) and higher-current monitoring circuits. |
| Dynamic Impedance | 0.5Ω at 1mA, 120Hz; provides fast transient response and minimal output perturbation during load steps. |
| Long-Term Stability | 120ppm after 1000h; critical for metering and calibration equipment requiring infrequent recalibration. |
Pinout & Package
SOT-23-3 package (DBZ) with 1.0mm pitch, 2.92mm × 1.3mm footprint, and exposed pad not connected. RoHS-compliant, lead-finish NIPDAU/SN, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode | Reference output node | Connected to regulated voltage rail; sinks all cathode current (IZ) and supplies reference voltage to external circuitry. |
| Anode | Ground reference terminal | Return path for cathode current; must be tied to system ground or lowest potential point in shunt configuration. |
| NC (Pin 3) | No-connect (floating) | Internally unconnected; per TI SOT-23 layout guidance, must remain unconnected or tied to Anode to avoid parasitic Schottky conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Eliminates BOM cost and board space for bypass caps while maintaining phase margin >45° across all capacitive loads up to 10μF. |
| Micropower operation | 60μA typical minimum cathode current enables continuous operation in battery-powered devices with multi-year shelf life. |
| Low thermal hysteresis | 0.36mV/V ensures repeatable voltage output after thermal cycling between –40°C and +125°C-critical for field-deployed test gear. |
| High EMI immunity | Internal design tolerates proximity to transformers and switching regulators; pin 3 grounding recommendation suppresses RF coupling paths. |
| Robust ESD rating | ±2000V HBM (all pins except FB) ensures survivability during PCB handling and assembly without special precautions. |
Applications
| Portable Data Loggers | Industrial Power Supply Monitors |
|---|---|
Use Scenario: Battery-powered environmental sensor nodes logging temperature, humidity, and pressure at 1-sample-per-minute intervals over 5+ years. IC Role / Device Role / Timing Role: Shunt reference providing excitation voltage for precision resistive sensors and reference for 16-bit SAR ADC. Use Value: 60μA minimum cathode current and 20μVRMS noise enable <1μA average system current and <0.5LSB quantization error at 2.5V full-scale. |
Use Scenario: DIN-rail mounted AC/DC converter with isolated output voltage monitoring for redundancy and fault reporting. IC Role / Device Role / Timing Role: Primary voltage reference for optocoupler feedback loop and secondary reference for local ADC-based telemetry. Use Value: ±0.1% initial accuracy and ±50ppm/°C tempco ensure ±0.3% total output regulation error across –25°C to +70°C ambient. |
| Laboratory Multimeters | Automotive Battery Management ICs |
Use Scenario: Benchtop 6½-digit DMM requiring stable internal reference for autoranging and auto-zero functions. IC Role / Device Role / Timing Role: Master reference for dual-slope integrator and calibration reference for offset/gain trim DACs. Use Value: 120ppm long-term stability and 0.36mV/V thermal hysteresis reduce annual recalibration frequency from quarterly to biannual. |
Use Scenario: 12V lead-acid battery voltage sensing in start-stop engine control units with extended temperature qualification. IC Role / Device Role / Timing Role: Precision shunt reference for high-side current sense amplifier and cell voltage monitor ADC reference. Use Value: Operation from –40°C to +85°C with guaranteed 0.1% accuracy enables reliable SoC estimation across full vehicle lifecycle without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3012AIDBZR | Fixed 1.2V output, ±0.2% initial accuracy, 50ppm/°C, 25μVRMS noise, 50μA min IZ | Lower accuracy and higher noise; suitable only where 1.2V nominal is mandatory and 0.2% error is acceptable | Select REF3012AIDBZR only if system design mandates exact 1.200V and can tolerate 0.1% higher error and 25% more noise. |
| LM4040A12IDBZR | Fixed 1.225V, ±0.1% accuracy, 100ppm/°C, 35μVRMS noise, 60μA min IZ, wider VZ range (1.2–10V) | Higher tempco and noise degrade precision in high-stability applications; broader family support but lower grade performance | Choose LM4040A12IDBZR only when cost sensitivity outweighs thermal drift requirements and noise budget permits ≥35μVRMS. |
Compared with REF3012AIDBZR and LM4040A12IDBZR, TL4051AIDBZT delivers superior thermal stability (50ppm/°C vs 100ppm/°C) and lower noise (20μVRMS vs 35μVRMS), making it optimal for metrology-grade and battery-constrained designs where long-term repeatability is non-negotiable.
Availability
TL4051AIDBZT is available at Aetrix Electronics and suitable for portable instrumentation, industrial power supply monitors, and laboratory test equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for TL4051AIDBZT 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 industrial-grade components.
The TL4051 series was designed specifically for high-accuracy, low-power shunt reference applications in data acquisition, energy metering, and portable instrumentation-emphasizing micropower operation, zero-capacitor stability, and robust thermal performance.
FAQ
What is the maximum cathode current rating for TL4051AIDBZT?
The absolute maximum cathode current for TL4051AIDBZT is 20mA, but the recommended operating limit is 12mA to maintain specified electrical characteristics and ensure long-term reliability. Exceeding 12mA may increase thermal drift and accelerate long-term voltage shift beyond the 120ppm specification.
Does TL4051AIDBZT require an output capacitor for stability?
No, TL4051AIDBZT does not require an output capacitor and is explicitly designed to remain stable with all capacitive loads-including up to 10μF-without external compensation. Adding a capacitor may improve PSRR but is never necessary for loop stability.
Can TL4051AIDBZT be used in automotive applications?
TL4051AIDBZT is qualified for industrial temperature range (–40°C to +85°C) and is commonly used in automotive body electronics and battery monitoring systems. However, it is not AEC-Q200 qualified; for under-hood or safety-critical applications, TI's automotive-grade TL4051A12QDBZT (–40°C to +125°C) is required.
What is the purpose of Pin 3 on the TL4051AIDBZT SOT-23 package?
Pin 3 on TL4051AIDBZT is a no-connect terminal. Due to a parasitic Schottky diode between Pins 2 and 3 in the SOT-23 die construction, TI specifies that Pin 3 must either be left floating or tied directly to Pin 2 (Anode) to prevent unintended conduction paths in high-EMI environments.
How does the TL4051AIDBZT differ from the adjustable TL4051AI variants?
TL4051AIDBZT is the fixed 1.225V version with no feedback (FB) pin; it uses only Cathode and Anode terminals. Adjustable variants (e.g., TL4051AIDBZR) include a third FB pin to set output voltage via external resistor divider and have different electrical characteristics-especially in ΔVREF/ΔVKA and minimum cathode current.
TL4051AIDBZT 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:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.212V
- Voltage - Output (Max):
- 10 V
- Current - Output:
- 12 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- 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
TL4051AIDBZT FAQ
1.How can I place an order for TL4051AIDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051AIDBZT 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 TL4051AIDBZT reliable?
The price and inventory of TL4051AIDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051AIDBZT is usually 5 days.
3.What payment methods are accepted for TL4051AIDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051AIDBZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051AIDBZT?
TL4051AIDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051AIDBZT 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 TL4051AIDBZT?
For technical support, including TL4051AIDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051AIDBZT requirements.
6.How does Aetrix verify that TL4051AIDBZT is sourced from the original manufacturer or authorized distributors?
All TL4051AIDBZT 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 TL4051AIDBZT meets industry standards.
7.What is the process for return or replacement of TL4051AIDBZT?
All TL4051AIDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4051AIDBZT, 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 TL4051AIDBZT part is unused and in its original packaging.
Return procedure for TL4051AIDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051AIDBZT Tags
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TL431AIDBZR
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