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Texas Instruments TL4051CQDCKR
- Part No.:
- TL4051CQDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051CQDCKR.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,270
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Product details
Overview
TL4051CQDCKR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.5% initial accuracy (C grade), 50ppm/°C temperature coefficient, 20μVRMS wideband noise, and stable operation from 60μA to 12mA cathode current. It operates across –40°C to 125°C and is used in high-accuracy battery-powered instrumentation and automotive power-supply monitors.
For engineers reviewing the TL4051CQDCKR datasheet, TL4051CQDCKR pinout, TL4051CQDCKR application, or TL4051CQDCKR equivalent, key selection criteria include extended-temperature-grade shunt reference stability, low-noise performance in space-constrained SC-70 packages, and compatibility with capacitive loads without external compensation.
Technical Context
The TL4051CQDCKR implements a bandgap-based shunt reference architecture optimized for micropower operation and thermal stability across automotive-grade temperature ranges. Its internal feedback loop maintains regulation with minimal cathode current while delivering low dynamic impedance (0.5Ω at 1mA) and predictable noise spectral density.
Unlike series references, it functions as a two-terminal device requiring only an external series resistor for biasing, enabling simple integration into voltage-monitoring circuits, ADC reference buffers, and adjustable regulator feedback networks where load current varies significantly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V ±6mV at 25°C (C grade); enables precise low-voltage ADC reference or comparator threshold setting |
| Initial Accuracy | ±0.5% max over 25°C; defines worst-case offset in calibration-critical systems like energy metering |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C; ensures <±0.625mV drift across full automotive range |
| Output Noise | 20μVRMS (10Hz–10kHz); supports high-resolution 16-bit+ data acquisition without added filtering |
| Cathode Current Range | 60μA to 12mA typical; allows operation from ultra-low-power sensor nodes to higher-current monitoring circuits |
| Dynamic Impedance | 0.5Ω at 1mA, 120Hz; minimizes output voltage perturbation during transient load changes |
| Long-Term Stability | 120ppm after 1000 hours; supports designs requiring multi-year calibration integrity |
Pinout & Package
TL4051CQDCKR is housed in a 5-pin SC-70 package (DCK), with pins 1, 2, and 3 forming the functional terminals; pins 4 and 5 are unused and internally disconnected. The device uses a standard SC-70 footprint measuring 2.0mm × 1.25mm × 0.9mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CATHODE (Pin 1) | Current sink terminal | Primary output node; connects to supply rail via series resistor and to load; regulates voltage by sinking variable current |
| ANODE (Pin 2) | Reference ground terminal | Return path for cathode current; must be connected to system ground or low-impedance reference plane |
| FB (Pin 3) | Feedback input (adjustable version only) | Not connected internally in TL4051CQDCKR (fixed 1.225V variant); left floating per datasheet guidance |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with all capacitive loads up to 10µF; eliminates BOM cost and layout area for bypass caps in portable designs |
| Micropower operation | 60μA typical minimum cathode current enables >10-year battery life in always-on monitoring applications |
| Extended temperature range | Rated for –40°C to +125°C ambient; qualified for under-hood automotive and industrial control environments |
| Low thermal hysteresis | 0.36mV/V over –40°C ↔ 125°C cycling; preserves accuracy after repeated thermal stress in field-deployed equipment |
| ESD robustness | ±2000V HBM rating; withstands handling and assembly without special ESD precautions beyond standard protocols |
Applications
| Battery-Powered Instrumentation | Automotive Power-Supply Monitor |
|---|---|
Use Scenario: Portable multimeter front-end using 16-bit sigma-delta ADC with ratiometric measurement. IC Role / Device Role / Timing Role: Precision 1.225V shunt reference providing stable excitation for ADC reference input and sensor bridge bias. Use Value: Enables ±0.01% measurement repeatability over temperature and battery discharge cycle due to tight initial tolerance and low tempco. |
Use Scenario: Real-time monitoring of 12V vehicle battery voltage during cold cranking and alternator transients. IC Role / Device Role / Timing Role: Shunt reference feeding comparator input to trigger low-voltage warning at 11.5V threshold. Use Value: Maintains accurate trip point across –40°C to 125°C engine bay conditions without calibration drift or capacitor dependency. |
| Energy Metering Reference | Industrial Process Controller |
Use Scenario: Revenue-grade electricity meter requiring metrology-grade voltage reference for current-sense amplifier gain calibration. IC Role / Device Role / Timing Role: Fixed 1.225V reference establishing known scale factor for isolated current transformer signal chain. Use Value: Delivers 120ppm long-term stability and <±0.5mV total error over 10-year service life, meeting IEC 62053-21 Class 0.2 requirements. |
Use Scenario: 4–20mA transmitter module converting RTD temperature readings in hazardous-area process loops. IC Role / Device Role / Timing Role: Low-noise shunt reference supplying excitation current and ADC reference for analog front-end. Use Value: 20μVRMS noise floor prevents quantization errors in 24-bit ADCs, ensuring <0.1°C resolution in temperature measurement. |
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, SOT-23-3 package, 50μA min current | Lower accuracy grade; not rated for 125°C operation; requires larger minimum current | Preferred for cost-sensitive industrial designs operating ≤85°C where 1.2V output suffices |
| MAX6008AEUR+T | Fixed 1.25V output, ±0.2% initial accuracy, 75ppm/°C, SOT-23-3, 35μA min current | Higher tempco; lower ESD rating (±1000V HBM); no 125°C qualification | Suitable for commercial-grade portable devices prioritizing ultra-low quiescent current over thermal stability |
Compared with TL4051CQDCKR, REF3012AIDBZR offers tighter initial accuracy but lacks extended-temperature qualification, while MAX6008AEUR+T provides lower operating current at the expense of thermal drift and ruggedness-making TL4051CQDCKR the optimal choice for automotive and high-reliability industrial use cases demanding both precision and environmental resilience.
Availability
TL4051CQDCKR is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive power-supply monitors, and energy metering applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TL4051CQDCKR 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 series was designed specifically for high-stability, low-power shunt reference applications in harsh environments-including automotive, industrial control, and portable test equipment-where reliability across wide temperature extremes is non-negotiable.
FAQ
What is the operating temperature range for TL4051CQDCKR?
The TL4051CQDCKR is characterized for operation from –40°C to +125°C ambient temperature, qualifying it for under-hood automotive, industrial control, and outdoor deployed equipment applications. This extended range is confirmed in Section 5.5 of the TI datasheet (SLOS487A) under TL4051x12Q electrical characteristics.
Does TL4051CQDCKR require an output capacitor for stability?
No, TL4051CQDCKR does not require an output capacitor for stability. As stated in Section 7.1 and Feature list, it is stable with all capacitive loads and needs no external capacitor-enabling direct connection to ADC reference inputs or comparator thresholds without added components.
What is the minimum cathode current needed for TL4051CQDCKR to regulate properly?
The TL4051CQDCKR requires a minimum cathode current of 60μA (typical) and 65μA (max over temperature) to maintain regulation. This value is specified in Table 5.5 (TL4051x12Q Electrical Characteristics) and enables ultra-low-power operation in always-on sensing nodes.
Is TL4051CQDCKR pin-compatible with other TL4051 variants in SC-70 packages?
Yes, TL4051CQDCKR shares identical SC-70 (DCK) pinout and footprint with all other TL4051xQDCKR variants (e.g., TL4051AQDCKR, TL4051BQDCKR). Pin 1 = CATHODE, Pin 2 = ANODE, Pin 3 = FB (NC for fixed versions), Pins 4–5 = no connect-confirmed in Section 4 (Pin Configuration) and Package Addendum.
What is the long-term stability specification for TL4051CQDCKR?
TL4051CQDCKR exhibits 120ppm long-term stability after 1000 hours of operation at 25°C, as measured under constant 100μA cathode current. This parameter is listed in Tables 5.4–5.7 and supports designs requiring calibration integrity over multi-year field deployment.
TL4051CQDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 75 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TL4051CQDCKR FAQ
1.How can I place an order for TL4051CQDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051CQDCKR 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 TL4051CQDCKR reliable?
The price and inventory of TL4051CQDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051CQDCKR is usually 5 days.
3.What payment methods are accepted for TL4051CQDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051CQDCKR transactions.
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4.How is shipping managed for TL4051CQDCKR?
TL4051CQDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051CQDCKR 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 TL4051CQDCKR?
For technical support, including TL4051CQDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051CQDCKR requirements.
6.How does Aetrix verify that TL4051CQDCKR is sourced from the original manufacturer or authorized distributors?
All TL4051CQDCKR 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 TL4051CQDCKR meets industry standards.
7.What is the process for return or replacement of TL4051CQDCKR?
All TL4051CQDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051CQDCKR, 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 TL4051CQDCKR part is unused and in its original packaging.
Return procedure for TL4051CQDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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