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Texas Instruments TL4051A12IDCKT
- Part No.:
- TL4051A12IDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051A12IDCKT.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,817
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Product details
Overview
TL4051A12IDCKT 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 serves as a low-drift, low-noise voltage基准 in high-resolution ADCs, portable power monitors, and battery-powered instrumentation.
For engineers reviewing the TL4051A12IDCKT datasheet, TL4051A12IDCKT pinout, TL4051A12IDCKT application, or TL4051A12IDCKT equivalent, key selection criteria include initial tolerance, thermal hysteresis (0.36mV/V), dynamic impedance (0.5Ω at 1mA), long-term stability (120ppm), and compatibility with all capacitive loads without external compensation.
Technical Context
The TL4051A12IDCKT operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 1.225V reverse breakdown voltage across its terminals. Its bandgap-based core delivers tight regulation over –40°C to +85°C, with low dynamic impedance (0.5Ω) and minimal voltage drift (±50ppm/°C max) across full operating current range.
It requires no output capacitor and remains stable under all capacitive load conditions. The device's feedback node is internal-unlike adjustable variants-and its SC-70 package supports space-constrained, low-power designs where thermal hysteresis (0.36mV/V) and 120ppm long-term stability are critical for metrology-grade accuracy.
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 improved accuracy. |
| Initial Tolerance | ±0.1% max at 25°C; ensures first-pass calibration success in 16-bit data acquisition systems. |
| Temp Coefficient | ±50ppm/°C max over –40°C to +85°C; limits drift to <±0.43mV across full industrial range. |
| Noise (10Hz–10kHz) | 20μVRMS typical; preserves SNR in precision audio DACs and low-noise sensor signal chains. |
| Cathode Current Range | 60μA to 12mA typical; supports ultra-low-power sleep modes and high-current transient response. |
| Dynamic Impedance | 0.5Ω at 1mA, 120Hz; minimizes load-induced output variation in multiplexed reference distribution. |
| Long-Term Stability | 120ppm after 1000h; reduces recalibration frequency in energy metering and process control hardware. |
Pinout & Package
TL4051A12IDCKT is housed in a 5-pin SC-70 (DCK) package. Pin 1 is Cathode, Pin 2 is Anode, and Pins 3–5 are unused (NC) - internally connected and must be left floating per TI design guidance. The SC-70 footprint measures 2.0mm × 1.25mm × 0.9mm, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Current sink terminal | Accepts 60μA–12mA cathode current; voltage develops across Cathode–Anode; connects to regulated rail or ADC reference input. |
| Anode (Pin 2) | Reference ground return | Serves as low-impedance return path; must connect directly to system ground plane to minimize noise coupling. |
| Pins 3–5 | No-connect (NC) | Internally tied off; electrically isolated and must remain unconnected on PCB to avoid parasitic leakage or EMI coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with any capacitive load up to 10µF; eliminates BOM cost and layout area for bypass caps in portable designs. |
| Ultra-low quiescent current | 60μA typical minimum cathode current enables >10-year battery life in IoT sensor nodes with periodic wake-up sampling. |
| Low thermal hysteresis | 0.36mV/V over –40°C ↔ 125°C cycling; prevents offset memory effects in field-deployed test equipment. |
| High ESD robustness | ±2000V HBM rating; withstands handling in non-ESD-controlled assembly environments without derating. |
| SC-70 space efficiency | 2.0mm × 1.25mm footprint; fits within 1.5mm pitch constraints of wearable medical devices and compact energy monitors. |
Applications
| Portable Data Loggers | Industrial Power-Supply Monitors |
|---|---|
Use Scenario: Battery-powered environmental sensors logging temperature, humidity, and pressure at 1-second intervals for 5+ years. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for 16-bit SAR ADCs measuring sensor bridge outputs; regulates bias current for analog front-end op-amps. Use Value: 60μA min cathode current and 20μVRMS noise enable sub-0.01% measurement repeatability while extending coin-cell lifetime beyond 60 months. | Use Scenario: DIN-rail mounted AC/DC power supply with real-time output voltage telemetry and overvoltage lockout. IC Role / Device Role / Timing Role: Serves as precision shunt reference in isolated feedback loop; compares regulated DC output against 1.225V threshold via optocoupler-coupled comparator. Use Value: ±0.1% tolerance and ±50ppm/°C drift ensure ±0.5% total output regulation accuracy across –25°C to +70°C ambient cabinet temperatures. |
| Energy Metering IC Reference | Automotive Cabin Air Quality Sensors |
Use Scenario: Class 0.5 electricity meter using metrology-grade AFE (e.g., MSP430i2041) to measure active/reactive power. IC Role / Device Role / Timing Role: Supplies reference voltage to delta-sigma ADCs digitizing current transformer and voltage divider signals; referenced by internal PGA gain calibration. Use Value: 120ppm long-term stability and 0.36mV/V thermal hysteresis meet IEC 62053-21 accuracy retention requirements over 15-year field life. | Use Scenario: HVAC control module monitoring CO₂, VOC, and particulate levels inside vehicle cabin with CAN bus reporting. IC Role / Device Role / Timing Role: References analog signal conditioning chain for NDIR CO₂ sensor amplifier and thermistor bias network. Use Value: Stable operation from –40°C to +85°C and immunity to capacitive loading allow direct integration into compact, fanless sensor housings near dashboard electronics. |
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 1.2V output, ±0.2% initial accuracy, 50ppm/°C, SC-70-3 package (3 pins vs DCK's 5 pins) | Higher initial error (±2.4mV vs ±1.23mV); same tempco but no long-term stability spec published | Choose when board space allows larger SC-70-3 footprint and ±0.2% tolerance is acceptable for cost-sensitive consumer designs. |
| ADR3412ARJZ-R7 | Fixed 1.2V output, ±0.1% initial accuracy, 30ppm/°C, SOT-23-3 package, higher 120μA min current | Lower tempco but requires ≥120μA cathode current; not rated for >85°C ambient | Prefer for lab-grade instrumentation needing tighter drift control below 85°C, accepting higher quiescent current penalty. |
Compared with REF3012AIDBZR and ADR3412ARJZ-R7, TL4051A12IDCKT offers the lowest combined error budget (±0.1% + ±50ppm/°C + 0.36mV/V hysteresis) in the smallest SC-70 variant, while supporting full industrial temperature range and ultra-low current operation down to 60μA.
Availability
TL4051A12IDCKT is available at Aetrix Electronics and suitable for portable instrumentation, industrial power-supply monitors, and energy metering applications requiring stable component supply, long-term calibration integrity, and extended temperature performance.
Supply support for TL4051A12IDCKT 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, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The TL4051 series was designed specifically for precision, low-power shunt reference applications demanding high initial accuracy, low noise, and robust capacitive-load stability - targeting data acquisition, portable sensing, and metrology systems.
FAQ
What is the maximum cathode current rating for TL4051A12IDCKT?
The absolute maximum cathode current for TL4051A12IDCKT is 20mA, but the recommended operating range is 60μA to 12mA. Operating above 12mA risks exceeding thermal limits in the SC-70 package, especially at elevated ambient temperatures. TI specifies 12mA as the upper limit for reliable long-term performance and stability.
Does TL4051A12IDCKT require an external output capacitor?
No, TL4051A12IDCKT does not require an external output capacitor and is explicitly designed to remain stable with all capacitive loads - including up to 10µF - without compensation. Adding a capacitor may reduce high-frequency noise but is never necessary for stability, simplifying layout in space-constrained designs.
What is the thermal hysteresis specification for TL4051A12IDCKT?
TL4051A12IDCKT has a thermal hysteresis of 0.36mV/V, measured as the difference in 1.225V output voltage at 25°C after cycling between –40°C and +125°C. This low hysteresis ensures repeatable reference accuracy in systems experiencing repeated thermal cycling, such as outdoor energy meters or automotive ECUs.
Can TL4051A12IDCKT be used in automotive applications?
TL4051A12IDCKT is qualified for industrial temperature range (–40°C to +85°C) and is commonly used in automotive cabin modules (e.g., air quality sensors, infotainment power rails). However, it is not AEC-Q200 qualified; for under-hood or safety-critical applications, TI's automotive-grade TL4051A12QDCKT (–40°C to +125°C, Q-grade) is the designated alternative.
How does the SC-70 package of TL4051A12IDCKT differ from SOT-23 variants?
TL4051A12IDCKT uses a 5-pin SC-70 (DCK) package with Pins 3–5 designated NC, whereas SOT-23-3 (DBZ) variants use only 3 pins. The SC-70 offers a smaller footprint (2.0mm × 1.25mm vs 2.92mm × 1.3mm) and lower thermal resistance (252°C/W vs 206°C/W for DBZ), making it preferable for ultra-compact, thermally sensitive designs despite identical electrical specs.
TL4051A12IDCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- 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:
- SC-70-5
TL4051A12IDCKT FAQ
1.How can I place an order for TL4051A12IDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051A12IDCKT 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 TL4051A12IDCKT reliable?
The price and inventory of TL4051A12IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051A12IDCKT is usually 5 days.
3.What payment methods are accepted for TL4051A12IDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051A12IDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051A12IDCKT?
TL4051A12IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051A12IDCKT 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 TL4051A12IDCKT?
For technical support, including TL4051A12IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051A12IDCKT requirements.
6.How does Aetrix verify that TL4051A12IDCKT is sourced from the original manufacturer or authorized distributors?
All TL4051A12IDCKT 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 TL4051A12IDCKT meets industry standards.
7.What is the process for return or replacement of TL4051A12IDCKT?
All TL4051A12IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with TL4051A12IDCKT, 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 TL4051A12IDCKT part is unused and in its original packaging.
Return procedure for TL4051A12IDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051A12IDCKT Tags
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