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Texas Instruments TL4051BIDBZT
- Part No.:
- TL4051BIDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4051BIDBZT.pdf
- Description:
- IC VREF SHUNT ADJ 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:756
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Product details
Overview
TL4051BIDBZT from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.2% initial accuracy (B 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.
For engineers reviewing the TL4051BIDBZT datasheet, TL4051BIDBZT pinout, TL4051BIDBZT application, or TL4051BIDBZT equivalent, key selection criteria include its low-noise shunt topology, no-output-capacitor-required stability, SOT-23-3 package compatibility with space-constrained PCBs, and guaranteed performance over industrial temperature range without external trimming.
Technical Context
The TL4051BIDBZT implements a bandgap-based shunt reference architecture with internal curvature compensation, delivering stable 1.225V output independent of cathode current between 60μA and 12mA. Its dynamic impedance remains ≤0.5Ω at 1mA/120Hz, enabling precise regulation under varying load conditions.
Designed for direct replacement of legacy references like LM4040B, it features integrated ESD protection (±2kV HBM), thermal hysteresis of 0.36mV/V, and long-term stability of 120ppm over 1000 hours - all verified across the full –40°C to +85°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V at 100μA cathode current; enables direct substitution in 1.2V–1.25V reference designs without resistor networks. |
| Initial Accuracy | ±0.2% max at 25°C (B grade); ensures system-level calibration tolerance without post-manufacture trimming. |
| Temp Coefficient | ±50ppm/°C max over –40°C to +85°C; maintains <±0.5mV drift across full industrial range. |
| Output Noise | 20μVRMS (10Hz–10kHz); supports high-resolution ADCs and low-noise analog front-ends without added filtering. |
| Cathode Current Range | 60μA (typ) to 12mA; allows ultra-low-power sensor nodes and robust regulation in high-current supply monitors. |
| Dynamic Impedance | 0.5Ω at 1mA/120Hz; minimizes output voltage perturbation during transient load steps in precision systems. |
| Stability | 120ppm after 1000h at 25°C; guarantees long-term reference integrity in metering and industrial control applications. |
Pinout & Package
SOT-23-3 package (DBZ) with 1.0mm × 1.4mm footprint, 0.95mm height, and gull-wing leads compatible with standard reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CATHODE | Reference output node | Connected to regulated voltage rail; sinks total current (load + reference bias); reverse-biased during normal operation. |
| ANODE | Ground reference terminal | Common return path for cathode current; must be tied to system ground or low-impedance reference plane. |
| FB (Adjustable version only) | Feedback input | Not connected on TL4051BIDBZT (fixed 1.225V variant); pin 3 is internally unused and left floating per TI SOT-23 layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with all capacitive loads up to 10µF; eliminates BOM cost and board area for bypass caps in portable designs. |
| Micropower operation | 60μA typical minimum cathode current enables >10-year battery life in always-on IoT sensors and energy harvesters. |
| Low thermal hysteresis | 0.36mV/V over –40°C ↔ +125°C cycling; prevents reference offset drift after temperature excursions in automotive ECUs. |
| High ESD robustness | ±2000V HBM rating; withstands handling and assembly without special ESD controls in standard production lines. |
| Wide operating current | 12mA max cathode current supports high-side sensing in 24V industrial power monitors without derating. |
Applications
| Data Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution 16-bit+ SAR ADCs in portable multimeters and environmental sensors. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for ADC full-scale calibration and ratiometric measurements. Use Value: 20μVRMS noise and ±0.2% accuracy enable <±0.003% measurement error without averaging or external filtering. |
Use Scenario: Real-time monitoring of 3.3V/5V/12V rails in telecom PSUs and server VRMs. IC Role / Device Role / Timing Role: Shunt reference in comparator-based overvoltage/undervoltage detection circuits. Use Value: Stable 1.225V threshold with <±0.5mV temp drift ensures reliable fault triggering across –40°C to +85°C ambient. |
| Instrumentation & Test Equipment | Battery-Powered Equipment |
Use Scenario: Portable oscilloscope front-ends and handheld calibrators requiring traceable DC voltage standards. IC Role / Device Role / Timing Role: Primary reference source for DAC output scaling and analog signal chain gain setting. Use Value: 120ppm long-term stability and ±50ppm/°C TC allow annual recalibration intervals without performance degradation. |
Use Scenario: Wearable health monitors and wireless sensor nodes powered by coin cells or Li-ion batteries. IC Role / Device Role / Timing Role: Low-power voltage reference for battery voltage gauging and sensor excitation circuits. Use Value: 60μA min cathode current extends CR2032 battery life beyond 5 years in sleep-mode dominant operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040BIM3-1.2 | Fixed 1.225V, ±0.2% accuracy, but higher 40ppm/°C TC and 35μVRMS noise; SOT-23-3 package. | Limited to lower-precision applications where <10μVRMS noise is not required. | Select when cost sensitivity outweighs noise and long-term stability requirements. |
| REF3012AIDBZR | Fixed 1.2V, ±0.2% accuracy, 50ppm/°C TC, but 30μVRMS noise and 50μA min current; same SOT-23-3 footprint. | Higher noise limits use in 16-bit+ data acquisition; tighter 1.2V output may require circuit redesign. | Choose only if 1.2V (not 1.225V) output is mandatory and noise budget permits ≥30μVRMS. |
Compared with LM4040BIM3-1.2 and REF3012AIDBZR, TL4051BIDBZT delivers superior noise performance (20μVRMS vs. ≥30μVRMS) and proven long-term stability (120ppm vs. uncharacterized), making it the preferred choice for metrology-grade and battery-critical applications demanding minimal drift and lowest possible uncertainty.
Availability
TL4051BIDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply with guaranteed industrial-temperature performance and RoHS-compliant packaging.
Supply support for TL4051BIDBZT 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 specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and high-reliability manufacturing.
The TL4051 series was developed specifically for applications demanding ultra-stable, low-noise, micropower shunt references - including portable instrumentation, energy metering, and automotive subsystems where size, power, and long-term accuracy are critical.
FAQ
What is the operating temperature range for TL4051BIDBZT?
The TL4051BIDBZT is characterized for operation from –40°C to +85°C, meeting industrial temperature requirements. This range is validated across all electrical specifications including initial accuracy, temperature coefficient, and dynamic impedance - ensuring consistent performance in harsh environments such as factory automation controllers and outdoor metering units.
Does TL4051BIDBZT require an external output capacitor?
No, TL4051BIDBZT does not require an external output capacitor for stability. It is designed to remain stable with all capacitive loads, including 0μF. Adding a capacitor is optional and only recommended for additional high-frequency noise filtering - not for loop compensation - making TL4051BIDBZT ideal for minimalist, space-constrained PCB layouts.
What is the minimum cathode current needed for TL4051BIDBZT to regulate properly?
The TL4051BIDBZT requires a minimum cathode current of 60μA (typical) to maintain regulation within specification. At 25°C, the absolute minimum is 39μA; however, design margins should target ≥65μA across the full –40°C to +85°C range to ensure guaranteed accuracy and low-tempco performance in production systems.
How does TL4051BIDBZT compare to adjustable TL4051 variants in pin compatibility?
TL4051BIDBZT uses the same SOT-23-3 (DBZ) package as adjustable TL4051 variants but has FB pin internally unused. Pin 1 = CATHODE, Pin 2 = ANODE, Pin 3 = NC (no connection). Unlike adjustable versions, TL4051BIDBZT's pin 3 must be left floating - connecting it risks parasitic conduction via the internal Schottky diode between pins 2 and 3.
Is TL4051BIDBZT suitable for automotive applications?
TL4051BIDBZT is rated for –40°C to +85°C, matching AEC-Q200 Grade 3 requirements for passenger compartment use. While not AEC-Q200 certified out-of-box, its tested performance - including 120ppm long-term stability and ±2kV HBM ESD rating - supports qualification in non-safety-critical automotive subsystems such as infotainment power monitoring and cabin sensor interfaces.
TL4051BIDBZT 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:
- ±0.2%
- 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
TL4051BIDBZT FAQ
1.How can I place an order for TL4051BIDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051BIDBZT 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 TL4051BIDBZT reliable?
The price and inventory of TL4051BIDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051BIDBZT is usually 5 days.
3.What payment methods are accepted for TL4051BIDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051BIDBZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051BIDBZT?
TL4051BIDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051BIDBZT 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 TL4051BIDBZT?
For technical support, including TL4051BIDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051BIDBZT requirements.
6.How does Aetrix verify that TL4051BIDBZT is sourced from the original manufacturer or authorized distributors?
All TL4051BIDBZT 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 TL4051BIDBZT meets industry standards.
7.What is the process for return or replacement of TL4051BIDBZT?
All TL4051BIDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4051BIDBZT, 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 TL4051BIDBZT part is unused and in its original packaging.
Return procedure for TL4051BIDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051BIDBZT Tags
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TL431AIDBZR
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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