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Texas Instruments TL4051AIDBZR
- Part No.:
- TL4051AIDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4051AIDBZR.pdf
- Description:
- IC VREF SHUNT ADJ 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,864
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Product details
Overview
TL4051AIDBZR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±0.1% initial accuracy (A grade), 50 ppm/°C temperature coefficient, 20 μVRMS wideband noise, and stable operation from 60 μA to 12 mA cathode current. It operates across –40°C to +85°C and is used in high-accuracy data acquisition systems requiring low-drift, low-noise analog references.
For engineers reviewing the TL4051AIDBZR datasheet, TL4051AIDBZR pinout, TL4051AIDBZR application, or TL4051AIDBZR equivalent, key selection criteria include initial voltage tolerance, thermal stability over industrial temperature range, micropower operation down to 60 μA, noise performance in sensor front-ends, and compatibility with capacitive loads without external compensation.
Technical Context
The TL4051AIDBZR implements a bandgap-based shunt reference architecture with internal curvature correction, delivering stable 1.225 V output independent of cathode current between 60 μA and 12 mA. Its low dynamic impedance (0.5 Ω at 1 mA, 120 Hz) and thermal hysteresis of 0.36 mV/V support precision measurement under thermal cycling.
Designed for SOT-23-3 (DBZ) packaging, it features a three-terminal configuration (Cathode, Anode, Feedback) where the Feedback pin is unused in fixed-output variants but internally tied to the reference node-enabling direct replacement of adjustable versions when configured for 1.225 V via external resistor network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V at 100 μA cathode current; enables direct substitution in 1.2 V–1.25 V reference designs without resistor divider. |
| Initial Accuracy | ±0.1% max at 25°C (A grade); ensures ≤1.23 mV absolute error in factory-calibrated instrumentation signal chains. |
| Temp Coefficient | ±50 ppm/°C max over –40°C to +85°C; contributes ≤0.62 mV drift across full industrial range, critical for uncalibrated long-term measurements. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); supports 16-bit+ resolution in low-frequency ADC applications without added filtering. |
| Cathode Current Range | 60 μA (typ) to 12 mA; allows biasing from ultra-low-power microcontrollers or high-current DAC buffers without external regulation. |
| Dynamic Impedance | 0.5 Ω at 1 mA / 120 Hz; maintains output regulation against fast load transients in multiplexed sensor arrays. |
| Long-Term Stability | 120 ppm after 1000 h; guarantees <0.15 mV drift over 6 months in energy metering or process control loggers. |
Pinout & Package
SOT-23-3 (DBZ) package: 3-pin surface-mount, 1.3 mm × 2.9 mm footprint, 1.0 mm height, JEDEC MO-178AC compliant, RoHS-compliant matte tin (NiPdAu) lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Connects to regulated voltage rail; sinks all cathode current (60 μA–12 mA); reverse-biased during normal operation. |
| Anode (Pin 2) | Ground reference terminal | Common return path for cathode current; must be connected to system ground or low-impedance reference plane. |
| Feedback (Pin 3) | Internal reference tap | Internally connected to bandgap core; left unconnected in fixed 1.225 V version (TL4051AIDBZR); not used as external feedback point. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with any capacitive load up to 10 μF; eliminates BOM cost and layout area for bypass caps in portable medical sensors. |
| Ultra-low quiescent current | 60 μA typical minimum cathode current enables operation from coin-cell batteries for >10-year lifetime in IoT endpoint monitors. |
| Low thermal hysteresis | 0.36 mV/V over –40°C ↔ 125°C cycling; preserves calibration integrity in automotive cabin temperature controllers. |
| Wide operating current range | Supports both micropower (60 μA) and high-drive (12 mA) modes in same device-ideal for shared reference rails in mixed-signal SoCs. |
| Robust ESD protection | ±2000 V HBM rating per pin (except FB pin at ±1000 V); withstands handling in non-ESD-controlled assembly environments. |
Applications
| Portable Energy Meters | Industrial Process Transmitters |
|---|---|
Use Scenario: Battery-powered smart electricity meters measuring RMS voltage/current with 0.1% billing accuracy over 10-year field life. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225 V基准 for 24-bit delta-sigma ADCs and metrology-grade PGA gain calibration. Use Value: ±0.1% initial tolerance and 120 ppm long-term drift ensure meter certification compliance without periodic recalibration. |
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitters operating in harsh factory environments (–40°C to +85°C). IC Role / Device Role / Timing Role: Precision reference for DAC output scaling and sensor excitation circuitry in isolated analog front-ends. Use Value: 50 ppm/°C tempco and 0.36 mV/V hysteresis maintain 0.05% full-scale accuracy across ambient thermal swings. |
| Automotive Cabin Sensors | Medical Patient Monitoring |
Use Scenario: Occupant detection and HVAC air quality modules requiring AEC-Q200 alignment and low EMI sensitivity. IC Role / Device Role / Timing Role: Low-noise (20 μVRMS) reference for thermistor and NDIR gas sensor signal conditioning. Use Value: Stable operation with all capacitive loads eliminates need for ferrite beads or layout shielding near high-frequency MCU clocks. |
Use Scenario: Portable ECG/SpO₂ devices powered by single Li-ion cell with continuous 24/7 operation and FDA Class II requirements. IC Role / Device Role / Timing Role: Micropower (60 μA) reference enabling >7-day battery life while maintaining 16-bit ADC linearity. Use Value: 0.5 Ω dynamic impedance ensures stable reference during rapid LED pulsing and amplifier settling in optical sensing paths. |
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 1.2 V output, ±0.2% initial accuracy, 50 ppm/°C, 33 μVRMS noise, 50 μA min cathode current | Lower accuracy and higher noise; suitable for cost-sensitive consumer electronics where 0.2% tolerance is acceptable | Choose REF3012AIDBZR only if 1.2 V (vs. 1.225 V) output and relaxed noise spec meet system SNR budget. |
| ADR3412ARJZ-R7 | Fixed 1.2 V output, ±0.1% initial accuracy, 30 ppm/°C, 10 μVRMS noise, 100 μA min cathode current, SC70-5 package | Lower tempco and noise, but requires ≥100 μA cathode current and different 5-pin package | Choose ADR3412ARJZ-R7 only if lower drift/noise justifies higher quiescent current and PCB redesign for SC70-5 footprint. |
Compared with TL4051AIDBZR, REF3012AIDBZR trades 0.1% accuracy and 13 μVRMS noise for lower minimum current, while ADR3412ARJZ-R7 improves drift and noise at the cost of higher bias current and incompatible 5-pin layout-neither is pin-compatible, and both require schematic and layout revision.
Availability
TL4051AIDBZR is available at Aetrix Electronics and suitable for portable energy meters, industrial process transmitters, automotive cabin sensors, and medical patient monitoring equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for TL4051AIDBZR 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, power management, and signal chain solutions.
The TL4051 series belongs to TI's precision voltage reference product line, designed specifically for applications demanding micropower operation, low drift, and high DC accuracy in space-constrained industrial and portable systems.
FAQ
What is the output voltage tolerance of TL4051AIDBZR over its full operating temperature range?
The TL4051AIDBZR has a maximum output voltage tolerance of ±0.1% at 25°C and ±5.2 mV (±0.43%) over the full –40°C to +85°C industrial temperature range, as specified in the TL4051A12I electrical characteristics table. This includes contributions from initial accuracy, temperature coefficient, and thermal hysteresis-ensuring predictable performance in uncalibrated field deployments.
Can TL4051AIDBZR operate stably without an output capacitor?
Yes, TL4051AIDBZR is explicitly designed to be stable with all capacitive loads and requires no output capacitor for stability. The datasheet confirms unconditional stability up to at least 10 μF, eliminating the need for external bypass components in battery-powered or space-constrained designs where TL4051AIDBZR serves as the primary reference.
What is the minimum cathode current required for TL4051AIDBZR to maintain regulation?
The TL4051AIDBZR requires a minimum cathode current of 60 μA (typical) and 65 μA (max over temperature) to maintain specified output voltage accuracy and regulation. Below this threshold, the device exits regulation and output voltage drops nonlinearly-critical for ultra-low-power wake-up circuits where TL4051AIDBZR supplies bias to comparators or op-amps.
How does the Feedback (FB) pin function in TL4051AIDBZR?
In TL4051AIDBZR-the fixed 1.225 V variant-the Feedback pin is internally connected to the reference node and serves no external function. It must be left floating or tied to the Anode (Pin 2) per TI's SOT-23 layout guidance; unlike adjustable versions, it is not used for external resistor feedback networks in TL4051AIDBZR applications.
Is TL4051AIDBZR suitable for automotive applications requiring AEC-Q200 qualification?
TL4051AIDBZR is rated for –40°C to +85°C operation and meets industrial reliability standards, but it is not AEC-Q200 qualified. For automotive cabin applications, TI offers the Q-grade variant TL4051A12QDBZR (–40°C to +125°C), which undergoes additional stress testing. TL4051AIDBZR should only be used in non-safety-critical automotive subsystems where full AEC-Q200 compliance is not mandated.
TL4051AIDBZR 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
TL4051AIDBZR FAQ
1.How can I place an order for TL4051AIDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051AIDBZR 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 TL4051AIDBZR reliable?
The price and inventory of TL4051AIDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051AIDBZR is usually 5 days.
3.What payment methods are accepted for TL4051AIDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051AIDBZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051AIDBZR?
TL4051AIDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051AIDBZR 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 TL4051AIDBZR?
For technical support, including TL4051AIDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051AIDBZR requirements.
6.How does Aetrix verify that TL4051AIDBZR is sourced from the original manufacturer or authorized distributors?
All TL4051AIDBZR 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 TL4051AIDBZR meets industry standards.
7.What is the process for return or replacement of TL4051AIDBZR?
All TL4051AIDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051AIDBZR, 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 TL4051AIDBZR part is unused and in its original packaging.
Return procedure for TL4051AIDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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