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Texas Instruments TL4051AIDBZTG4
- Part No.:
- TL4051AIDBZTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4051AIDBZTG4.pdf
- Description:
- IC VREF SHUNT ADJ 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,957
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Product details
Overview
TL4051AIDBZTG4 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, battery-powered instrumentation, and power-supply monitoring circuits where low drift and minimal quiescent current are critical.
For engineers reviewing the TL4051AIDBZTG4 datasheet, TL4051AIDBZTG4 pinout, TL4051AIDBZTG4 application, or TL4051AIDBZTG4 equivalent, key selection criteria include initial tolerance, thermal stability over industrial temperature range, noise performance at low bias currents, and compatibility with capacitive loads without external compensation.
Technical Context
The TL4051AIDBZTG4 implements a bandgap-based shunt reference architecture optimized for micropower operation. Its internal circuit maintains regulation by sinking variable cathode current while holding the cathode-to-anode voltage at precisely 1.225V under load, with dynamic impedance as low as 0.5Ω at 1mA.
It features a dedicated feedback node only in adjustable variants; the TL4051AIDBZTG4 is the fixed-output version, eliminating external resistor networks and simplifying layout. Stability is guaranteed across all capacitive loads - no output capacitor required - making it suitable for space-constrained, low-noise analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V - enables direct replacement of legacy 1.2V references with tighter tolerance and lower drift. |
| Initial Accuracy | ±0.1% max at 25°C - ensures system-level calibration validity without per-unit trimming in production test. |
| Temp Coefficient | 50ppm/°C max - limits output drift to ≤62.5μV over full –40°C to +85°C range, critical for precision ADC references. |
| Noise (10Hz–10kHz) | 20μVRMS typical - supports high-resolution (≥16-bit) data acquisition without added filtering overhead. |
| Cathode Current Range | 60μA to 12mA - allows use in ultra-low-power sensor nodes (<100μA sleep mode) and higher-current regulator feedback paths. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and energy metering hardware. |
| Dynamic Impedance | 0.5Ω at 1mA - minimizes load-induced voltage shift in varying-current applications like DAC buffers. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92mm × 1.3mm surface-mount outline with gull-wing leads, JEDEC MO-178 compliant, RoHS-compliant matte tin (NIPDAU) lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode | Regulated output node | Connected to supply rail via series resistor; sinks current to maintain 1.225V between Cathode and Anode. |
| Anode | Reference ground terminal | Must be tied to system ground; forms the return path for cathode current and defines output voltage reference point. |
| NC / FB (No Connect) | Not internally connected | Pin 3 is unconnected in fixed-output TL4051AIDBZTG4; must be left floating or tied to Anode per TI EMI guidance. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Guaranteed stability with any capacitive load - eliminates BOM cost, board area, and reliability risk from ceramic capacitor aging or microphonics. |
| Low 20μVRMS noise | Enables direct coupling to precision SAR or delta-sigma ADCs without additional low-noise LDO or RC filtering stages. |
| 60μA min operating current | Supports operation in battery-backed real-time clocks and wireless sensor transceivers with sub-100μA sleep budgets. |
| 50ppm/°C tempco | Reduces calibration frequency in field-deployed instruments - drift remains within 1 LSB of a 16-bit 5V full-scale system over temperature. |
| Industrial temp range | Validated performance from –40°C to +85°C - suitable for DIN-rail mounted PLC I/O modules and outdoor energy meters. |
Applications
| Portable Data Loggers | Industrial Power-Supply Monitors |
|---|---|
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and pressure at 1Hz with 16-bit ADC resolution. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for successive-approximation ADC conversion, directly replacing less accurate Zener diodes. Use Value: 20μVRMS noise and 50ppm/°C drift ensure <0.01% measurement error across –20°C to +60°C ambient, extending field calibration intervals to 2+ years. |
Use Scenario: DIN-rail mounted AC/DC power supply with isolated output voltage monitoring for overvoltage protection and telemetry. IC Role / Device Role / Timing Role: Shunt reference in optocoupler feedback loop of secondary-side regulation, setting precise 1.225V threshold for comparator trip point. Use Value: ±0.1% initial accuracy and stable cathode current sink enable ±0.5% output voltage regulation tolerance without trimming, reducing manufacturing test time. |
| Precision Audio DAC Buffers | Energy Meter Reference Subsystem |
Use Scenario: High-fidelity audio DAC module requiring ultra-low-noise analog voltage reference for I/V conversion stage. IC Role / Device Role / Timing Role: Supplies clean 1.225V bias to op-amp-based current-to-voltage converter driving balanced headphone outputs. Use Value: 20μVRMS broadband noise avoids audible hiss floor elevation; 0.5Ω dynamic impedance prevents distortion during fast transient current demands. |
Use Scenario: Class 0.2 electricity meter using metrology-grade ADC to measure active/reactive power with <0.1% total error budget. IC Role / Device Role / Timing Role: Primary voltage reference for 24-bit sigma-delta ADC measuring shunt-based current and transformer-based voltage inputs. Use Value: Long-term stability of 120ppm after 1000h and thermal hysteresis of 0.36mV/V ensure meter certification compliance over 10-year field life. |
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 | 1.2V output, ±0.2% initial accuracy, 50ppm/°C, 22μVRMS noise, SOT-23-3, same temp range | Looser initial tolerance; slightly higher noise; identical pinout and footprint | Acceptable where ±0.2% system-level accuracy suffices and cost sensitivity outweighs 0.1% gain calibration margin. |
| ADR3412ARJZ-R7 | 1.2V output, ±0.1% initial accuracy, 30ppm/°C, 10μVRMS noise, SOT-23-5, –40°C to +125°C | Lower noise and better tempco, but requires 5-pin SC-70 package and higher minimum current (100μA) | Preferred for automotive under-hood applications needing extended temperature range and lower noise, accepting larger footprint and higher bias. |
Compared with REF3012AIDBZR and ADR3412ARJZ-R7, the TL4051AIDBZTG4 delivers the tightest initial accuracy in its class at lowest quiescent current, making it optimal for industrial portable instrumentation where calibration headroom and battery life are primary constraints - not a drop-in replacement for the 5-pin ADR3412, and less accurate than the ADR3412 in thermal drift but more micropower-efficient.
Availability
TL4051AIDBZTG4 is available at Aetrix Electronics and suitable for precision data acquisition systems, industrial power-supply monitors, and battery-powered instrumentation requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for TL4051AIDBZTG4 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 over 50 years of innovation in precision analog ICs and broad industrial portfolio coverage.
The TL4051 series was designed specifically for micropower, high-accuracy shunt reference applications in space-constrained industrial and portable equipment - emphasizing low drift, low noise, and zero-output-capacitor stability.
FAQ
What is the output voltage tolerance of TL4051AIDBZTG4 over its full operating temperature range?
The TL4051AIDBZTG4 has a maximum reverse breakdown voltage tolerance of ±5.2mV over the full –40°C to +85°C range, corresponding to ±0.43% of nominal 1.225V output. This is derived from the TL4051A12I specification table, where full-range tolerance is specified as ±5.2mV at 25°C and extends conservatively across temperature per device characterization.
Does TL4051AIDBZTG4 require an external output capacitor for stability?
No, TL4051AIDBZTG4 does not require an external output capacitor. Its internal design ensures unconditional stability with all capacitive loads, including 0μF - a key differentiator from older shunt references that mandate minimum capacitance for phase margin.
What is the minimum cathode current needed for TL4051AIDBZTG4 to maintain regulation?
The TL4051AIDBZTG4 requires a minimum cathode current of 65μA over the full –40°C to +85°C range to maintain regulation. At 25°C, typical minimum current is 60μA, but design margins must accommodate the worst-case 65μA spec across temperature.
Can TL4051AIDBZTG4 be used in automotive under-hood applications?
TL4051AIDBZTG4 is rated for –40°C to +85°C, which covers passenger cabin and some engine-control module locations, but not under-hood environments exceeding +85°C. For under-hood use, the TL4051A12QDBZR (–40°C to +125°C) variant is specified and recommended instead.
How does the pin configuration of TL4051AIDBZTG4 differ from the adjustable TL4051AI variants?
TL4051AIDBZTG4 uses only two active terminals (Cathode and Anode); Pin 3 is unconnected. Adjustable variants (e.g., TL4051AIDBZR) repurpose Pin 3 as the Feedback (FB) input for external resistor divider control - making TL4051AIDBZTG4 pin-compatible only with other fixed-output DBZ variants, not adjustable versions.
TL4051AIDBZTG4 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:
- Discontinued at Digi-Key
- 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
TL4051AIDBZTG4 FAQ
1.How can I place an order for TL4051AIDBZTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051AIDBZTG4 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 TL4051AIDBZTG4 reliable?
The price and inventory of TL4051AIDBZTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051AIDBZTG4 is usually 5 days.
3.What payment methods are accepted for TL4051AIDBZTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051AIDBZTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051AIDBZTG4?
TL4051AIDBZTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051AIDBZTG4 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 TL4051AIDBZTG4?
For technical support, including TL4051AIDBZTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051AIDBZTG4 requirements.
6.How does Aetrix verify that TL4051AIDBZTG4 is sourced from the original manufacturer or authorized distributors?
All TL4051AIDBZTG4 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 TL4051AIDBZTG4 meets industry standards.
7.What is the process for return or replacement of TL4051AIDBZTG4?
All TL4051AIDBZTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL4051AIDBZTG4, 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 TL4051AIDBZTG4 part is unused and in its original packaging.
Return procedure for TL4051AIDBZTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051AIDBZTG4 Tags
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TL431AIDBZR
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