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Texas Instruments TL4051C12QDBZR
- Part No.:
- TL4051C12QDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4051C12QDBZR.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,877
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Product details
Overview
TL4051C12QDBZR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.5% initial tolerance (max), 50ppm/°C temperature coefficient, and 20μVRMS wideband noise. It operates from –40°C to 125°C and supports cathode current from 65μA to 12mA, enabling use in automotive sensor signal conditioning and high-accuracy battery monitoring circuits.
For engineers reviewing the TL4051C12QDBZR datasheet, TL4051C12QDBZR pinout, TL4051C12QDBZR application, or TL4051C12QDBZR equivalent, key selection factors include extended-temperature operation, low-noise performance at microamp bias, stability without output capacitance, and SOT-23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The TL4051C12QDBZR implements a bandgap-based shunt reference architecture optimized for low quiescent current and minimal thermal drift. Its internal feedback loop maintains regulation across 65μA–12mA cathode current while delivering 1.225V with ±12.2mV total error over –40°C to 125°C.
It features a 0.5Ω dynamic impedance at 1mA/120Hz and exhibits no instability with capacitive loads-eliminating need for external bypass capacitors. The device's thermal hysteresis is specified at 0.36mV/V over full temperature cycling, supporting repeatable precision in cyclic thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V at 100μA; enables direct replacement of legacy 1.2V references with tighter accuracy. |
| Initial Tolerance | ±0.5% max at 25°C; ensures system-level calibration margin without per-unit trimming. |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C; limits drift to ±6.1mV across full operating range. |
| Noise (10Hz–10kHz) | 20μVRMS typical; preserves SNR in 16-bit+ ADC front-ends and precision DAC references. |
| Cathode Current Range | 65μA min to 12mA max; supports ultra-low-power wake-up circuits and high-current load regulation. |
| Dynamic Impedance | 0.5Ω at 1mA/120Hz; minimizes output voltage shift under transient load changes. |
| Thermal Hysteresis | 0.36mV/V; guarantees ≤0.44mV output deviation after repeated –40°C ↔ 125°C thermal cycling. |
Pinout & Package
SOT-23-3 package (DBZ) with 1.0mm pitch, 2.92mm × 1.3mm footprint, and 1.02mm height. RoHS-compliant, lead-free NIPDAU/SN finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CATHODE | Reference output node | Connects to regulated 1.225V output; sinks all cathode current (65μA–12mA); requires external series resistor for current limiting. |
| ANODE | Ground reference terminal | Common return path for cathode current; must be tied to system ground; forms reference voltage across CATHODE–ANODE. |
| NC / FB (No Connect) | Unused terminal | Internally unconnected; must be left floating or tied to ANODE per TI recommendation to avoid EMI coupling in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates mandatory output capacitor-reduces BOM count and PCB area in compact designs. |
| Low 20μVRMS noise | Enables <18-bit ENOB in precision data acquisition systems without additional filtering. |
| 65μA minimum cathode current | Supports operation in battery-powered devices with sub-100μA sleep-mode current budgets. |
| –40°C to 125°C operation | Qualified for under-hood automotive, industrial motor control, and energy metering applications. |
| 0.5Ω dynamic impedance | Maintains <0.6mV output shift during 1mA load transients-critical for stable ADC reference rails. |
Applications
| Automotive Sensor Signal Conditioning | Industrial Process Transmitter |
|---|---|
Use Scenario: Providing stable excitation voltage and reference for RTD/thermocouple front-ends in engine control units. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise 1.225V reference rail for analog signal chain gain/offset calibration. Use Value: ±0.5% tolerance and ±50ppm/°C TC ensure <±0.1% total error over –40°C to 125°C, meeting ASIL-B functional safety requirements. | Use Scenario: Reference source in 4–20mA loop-powered pressure/flow transmitters. IC Role / Device Role / Timing Role: Micropower shunt reference supplying excitation and ADC reference within strict 3.5mA loop budget. Use Value: 65μA min cathode current allows operation down to 3.3V supply with >100Ω headroom, preserving loop compliance. |
| Battery-Powered Energy Metering | Precision Audio DC Biasing |
Use Scenario: Reference for metrology-grade ADCs in smart electricity meters with 10-year battery life target. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference for anti-aliasing filter and ADC reference in Class 0.2 meters. Use Value: 20μVRMS noise contributes <0.001% THD+N to measurement path; long-term stability of 120ppm/1000h ensures calibration longevity. | Use Scenario: DC bias generation for op-amp input stages in portable audio codecs and headphone amplifiers. IC Role / Device Role / Timing Role: Ultra-low-noise shunt reference setting virtual ground and common-mode voltage for audio signal paths. Use Value: Absence of required output capacitor prevents audible "pop" during power-up; 20μVRMS noise avoids audible hiss in 24-bit playback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4051B12QDBZR | ±0.2% initial tolerance (vs. ±0.5% for TL4051C12QDBZR); identical tempco, noise, and package. | Higher accuracy required in factory-calibrated instrumentation where post-manufacture trimming is impractical. | Select TL4051B12QDBZR when system-level accuracy budget demands <±0.25% total reference error over temperature. |
| REF3012AIDBZR | 1.2V output, ±0.2% tolerance, 50ppm/°C, but higher 3.5μA quiescent current and requires 1μF output capacitor for stability. | Used in non-automotive industrial controls where board space is less constrained and higher supply current is acceptable. | Choose REF3012AIDBZR only if existing design already uses its capacitor-stabilized topology and layout cannot accommodate TL4051's capacitor-free operation. |
Compared with TL4051B12QDBZR, TL4051C12QDBZR trades 0.3% initial accuracy for lower cost in high-volume automotive and industrial applications where system calibration compensates for offset; versus REF3012AIDBZR, it eliminates output capacitance and reduces quiescent current by >98%, enabling true micropower operation.
Availability
TL4051C12QDBZR is available at Aetrix Electronics and suitable for automotive sensor modules, industrial process transmitters, and battery-powered energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL4051C12QDBZR 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 automotive-grade components.
The TL4051 product line delivers micropower shunt voltage references optimized for extended-temperature operation, low-noise performance, and capacitor-free stability-targeting automotive, industrial, and energy infrastructure applications.
FAQ
What is the maximum cathode current rating for TL4051C12QDBZR?
The TL4051C12QDBZR has a maximum continuous cathode current rating of 12mA, as specified in its Absolute Maximum Ratings table. Exceeding this value risks thermal damage or parametric degradation. At 12mA, power dissipation reaches ~14.7mW (1.225V × 12mA), well within the SOT-23-3 package's thermal limits at ambient temperatures up to 125°C. Always verify junction temperature using θJA = 206°C/W.
Does TL4051C12QDBZR require an output capacitor for stability?
No, TL4051C12QDBZR does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads, including direct connection to large bulk capacitors or ADC input capacitors. This eliminates BOM cost and PCB area typically needed for decoupling, making TL4051C12QDBZR ideal for space-constrained and ultra-low-power applications where capacitor leakage would compromise performance.
What is the meaning of the 'Q' suffix in TL4051C12QDBZR?
The 'Q' suffix in TL4051C12QDBZR denotes qualification for the extended temperature range of –40°C to 125°C, as defined in TI's automotive and industrial product grading. This distinguishes it from 'I'-grade variants rated for –40°C to 85°C. The 'Q' grade undergoes additional testing-including high-temperature operating life and thermal cycling-to ensure reliability in under-hood automotive, motor drive, and industrial control environments where ambient temperatures exceed standard industrial limits.
How does the NC pin (Pin 3) function in TL4051C12QDBZR?
In TL4051C12QDBZR, Pin 3 is a no-connect (NC) terminal with no internal connection. TI recommends leaving it floating or connecting it to ANODE (Pin 2) to reduce susceptibility to electromagnetic interference in high-noise environments such as near switching power supplies or motor drivers. This practice mitigates potential coupling through the parasitic Schottky diode between Pins 2 and 3 inherent to the SOT-23-3 DBZ package structure.
What is the long-term stability specification for TL4051C12QDBZR?
The TL4051C12QDBZR exhibits 120ppm long-term stability after 1000 hours of operation at 25°C ±0.1°C with 100μA cathode current. This parameter quantifies output voltage drift due to aging effects and is measured under controlled conditions. In real-world applications, actual drift may vary based on operating temperature, current stress, and PCB thermal design-but 120ppm provides a validated baseline for predicting calibration interval requirements in precision instrumentation and metrology systems.
TL4051C12QDBZR 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
TL4051C12QDBZR FAQ
1.How can I place an order for TL4051C12QDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051C12QDBZR 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 TL4051C12QDBZR reliable?
The price and inventory of TL4051C12QDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051C12QDBZR is usually 5 days.
3.What payment methods are accepted for TL4051C12QDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051C12QDBZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051C12QDBZR?
TL4051C12QDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051C12QDBZR 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 TL4051C12QDBZR?
For technical support, including TL4051C12QDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051C12QDBZR requirements.
6.How does Aetrix verify that TL4051C12QDBZR is sourced from the original manufacturer or authorized distributors?
All TL4051C12QDBZR 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 TL4051C12QDBZR meets industry standards.
7.What is the process for return or replacement of TL4051C12QDBZR?
All TL4051C12QDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051C12QDBZR, 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 TL4051C12QDBZR part is unused and in its original packaging.
Return procedure for TL4051C12QDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051C12QDBZR 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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