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Texas Instruments TL4051C12QDBZT
- Part No.:
- TL4051C12QDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4051C12QDBZT.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:129
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Product details
Overview
TL4051C12QDBZT from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.5% initial tolerance (max), 50ppm/°C temperature coefficient (max), 20μVRMS wideband noise, and stable operation from 60μA to 12mA cathode current - used in high-accuracy data acquisition and battery-powered instrumentation.
For engineers reviewing the TL4051C12QDBZT datasheet, TL4051C12QDBZT pinout, TL4051C12QDBZT application, or TL4051C12QDBZT equivalent, key selection criteria include extended-temperature operation (–40°C to 125°C), SOT-23-3 package compatibility, low-noise performance, and shunt topology suitability for space-constrained, low-power analog signal chains.
Technical Context
The TL4051C12QDBZT implements a bandgap-based shunt reference architecture optimized for micropower operation, delivering stable 1.225V output without requiring external capacitors. Its dynamic impedance remains ≤0.5Ω at 1mA, enabling robust regulation under varying load conditions.
Designed for extended-temperature automotive and industrial applications, it maintains ±50ppm/°C max temperature coefficient across –40°C to 125°C and exhibits thermal hysteresis of only 0.36mV/V over that range - critical for repeatable calibration in field-deployed systems.
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 accuracy. |
| Initial Tolerance | ±0.5% (max) at 25°C - supports cost-sensitive designs where C-grade performance meets system-level accuracy requirements. |
| Temp Coefficient | ±50ppm/°C (max) over –40°C to 125°C - ensures <±0.625mV drift across full operating range for stable ADC reference. |
| Noise (10Hz–10kHz) | 20μVRMS (typical) - minimizes contribution to system noise floor in precision measurement front-ends. |
| Cathode Current Range | 60μA (typ) to 12mA - allows use in ultra-low-power sensor nodes and higher-current feedback loops without external buffering. |
| Dynamic Impedance | 0.5Ω (typ) at 1mA - provides low AC impedance for effective ripple rejection in power-supply monitor circuits. |
| Long-Term Stability | 120ppm (1000h) - reduces recalibration frequency in energy metering and process control applications. |
Pinout & Package
SOT-23-3 package (DBZ) with 1.0mm × 1.4mm footprint and 0.95mm height - compatible with standard pick-and-place equipment and reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CATHODE | Reference output node | Connected to regulated 1.225V output; sinks all cathode current (IZ) and load current (IL) in shunt configuration. |
| ANODE | Ground reference terminal | Common return path for cathode current; must be tied to system ground or low-impedance reference plane. |
| NC / FB (No Connect) | Unused terminal (fixed version) | Internally unconnected; left floating per TI recommendation - no external connection required or recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load - eliminates need for output bypass capacitor and associated layout constraints. |
| Micropower operation | 60μA typical minimum cathode current - extends battery life in portable instrumentation and wireless sensors. |
| Extended temperature grade | Specified from –40°C to 125°C - qualified for under-hood automotive, industrial motor drives, and outdoor energy metering. |
| Low thermal hysteresis | 0.36mV/V over –40°C ↔ 125°C cycling - preserves calibration integrity after repeated thermal excursions. |
| ESD robustness | ±2000V HBM rating - withstands handling and board assembly without special ESD precautions beyond standard practices. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution 16-bit SAR ADC reference in portable environmental sensor node. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225V reference for ADC conversion accuracy. Use Value: Enables ±0.5% full-scale accuracy over –40°C to 85°C without trimming, reducing BOM count and calibration labor. | Use Scenario: Overvoltage detection circuit monitoring 3.3V rail in automotive body control module. IC Role / Device Role / Timing Role: Precision shunt reference feeding comparator input for accurate threshold detection. Use Value: Delivers ±50ppm/°C drift control, ensuring trip point remains within ±15mV over full vehicle temperature range. |
| Process Control Transmitters | Battery-Powered Equipment |
Use Scenario: 4–20mA loop transmitter with HART modulation requiring stable internal reference. IC Role / Device Role / Timing Role: Primary voltage reference for DAC and current-sense amplifier biasing. Use Value: 20μVRMS noise and 120ppm long-term stability maintain 0.1% loop accuracy over 5-year field deployment. | Use Scenario: Low-power medical pulse oximeter using coin-cell battery. IC Role / Device Role / Timing Role: Reference source for photodiode transimpedance amplifier and ADC. Use Value: 60μA min cathode current enables operation down to 2.2V supply, extending usable battery life by >20% vs. higher-IQ alternatives. |
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 tolerance, 50ppm/°C, SOT-23-3, but requires ≥100μA min cathode current. | Higher minimum current increases quiescent power - less suitable for sub-100μA battery systems. | Select when tighter initial accuracy (A-grade) is required and system can support higher bias current. |
| LM4040C12IDBZR | 1.225V output, ±0.5% tolerance, 100ppm/°C max tempco, SOT-23-3, 60μA min cathode current. | Double the temperature coefficient limits accuracy in wide-temperature industrial environments. | Select for cost-sensitive applications where ±100ppm/°C drift is acceptable and extended-temp qualification is not required. |
Compared with REF3012AIDBZR and LM4040C12IDBZR, TL4051C12QDBZT delivers identical C-grade tolerance with half the temperature coefficient of LM4040 and lower minimum current than REF3012 - making it optimal for extended-temperature, ultra-low-power shunt reference needs.
Availability
TL4051C12QDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply across automotive and industrial temperature ranges.
Supply support for TL4051C12QDBZT 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 belongs to TI's precision voltage reference product line, engineered for high-accuracy, low-drift, micropower operation in demanding measurement, control, and sensing applications.
FAQ
What is the operating temperature range of TL4051C12QDBZT?
The TL4051C12QDBZT is characterized for operation from –40°C to +125°C ambient temperature - qualifying it for under-hood automotive, industrial motor control, and outdoor energy metering applications where extended thermal performance is mandatory. This Q-grade specification distinguishes it from the I-grade (–40°C to +85°C) variants in the same family.
Does TL4051C12QDBZT require an output capacitor?
No, TL4051C12QDBZT does not require an output capacitor for stability. It is explicitly designed to remain stable with all capacitive loads, including direct connection to large bulk capacitance on the cathode node. Adding a capacitor may reduce high-frequency noise but is never necessary for loop stability.
What is the minimum cathode current needed for TL4051C12QDBZT to regulate properly?
The TL4051C12QDBZT requires a minimum cathode current of 60μA (typical) at 25°C, with a maximum of 65μA across the full –40°C to 125°C range. Below this threshold, output voltage regulation degrades - design must ensure external bias resistor supplies ≥65μA under worst-case low-temperature, low-input-voltage conditions.
How does the pinout of TL4051C12QDBZT differ from adjustable versions?
TL4051C12QDBZT uses the same SOT-23-3 DBZ package as adjustable variants but leaves Pin 3 (FB) unconnected. In contrast, adjustable TL4051xQ variants route Pin 3 to the internal feedback node. TI specifies Pin 3 on TL4051C12QDBZT as NC - it must remain floating and must not be tied to anode or cathode.
Is TL4051C12QDBZT RoHS-compliant and lead-free?
Yes, TL4051C12QDBZT is RoHS-compliant and features lead-free terminations with NIPDAU (nickel-palladium-gold) or pure tin (SN) finish, per TI's Package Option Addendum. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is rated for peak reflow up to 260°C.
TL4051C12QDBZT 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):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 12 mA
- Tolerance:
- ±0.5%
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4051C12QDBZT FAQ
1.How can I place an order for TL4051C12QDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051C12QDBZT 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 TL4051C12QDBZT reliable?
The price and inventory of TL4051C12QDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051C12QDBZT is usually 5 days.
3.What payment methods are accepted for TL4051C12QDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051C12QDBZT transactions.
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4.How is shipping managed for TL4051C12QDBZT?
TL4051C12QDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051C12QDBZT 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 TL4051C12QDBZT?
For technical support, including TL4051C12QDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051C12QDBZT requirements.
6.How does Aetrix verify that TL4051C12QDBZT is sourced from the original manufacturer or authorized distributors?
All TL4051C12QDBZT 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 TL4051C12QDBZT meets industry standards.
7.What is the process for return or replacement of TL4051C12QDBZT?
All TL4051C12QDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4051C12QDBZT, 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 TL4051C12QDBZT part is unused and in its original packaging.
Return procedure for TL4051C12QDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051C12QDBZT Tags
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TL431AIDBZR
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TL431BQDBZR
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AZ431LBNTR-G1
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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