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Texas Instruments TL4051C12QDCKR
- Part No.:
- TL4051C12QDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051C12QDCKR.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,401
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Product details
Overview
TL4051C12QDCKR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±0.5% initial tolerance (max), 50 ppm/°C temperature coefficient, 20 μVRMS wideband noise, and stable operation from 60 μA to 12 mA cathode current. It serves as a high-accuracy voltage reference in battery-powered instrumentation and automotive power-supply monitors.
For engineers reviewing the TL4051C12QDCKR datasheet, TL4051C12QDCKR pinout, TL4051C12QDCKR application, or TL4051C12QDCKR equivalent, key selection criteria include extended-temperature operation (–40°C to 125°C), SC-70-5 package compatibility, low-noise performance, and absence of required output capacitance for stability.
Technical Context
The TL4051C12QDCKR implements a bandgap-based shunt reference architecture optimized for micropower operation. Its internal circuit maintains regulation by sinking variable cathode current while holding the cathode-to-anode voltage at 1.225 V across load and supply variations.
It operates without external capacitors and remains stable under all capacitive loads due to inherent low dynamic impedance (0.5 Ω at 1 mA) and controlled phase margin. The device's thermal hysteresis is specified at 0.36 mV/V over –40°C to 125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V - provides stable reference point for ADCs, DACs, and comparator thresholds. |
| Initial Tolerance | ±0.5% max at 25°C - enables direct use in 12-bit systems without trimming. |
| Temp Coefficient | ±50 ppm/°C max - ensures ≤0.625 mV drift over full –40°C to 125°C range. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz) - supports high-resolution measurement circuits without added filtering. |
| Cathode Current Range | 60 μA to 12 mA - accommodates ultra-low-power sensor nodes and higher-current analog front-ends. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive and industrial control environments. |
| Dynamic Impedance | 0.5 Ω at 1 mA - minimizes output voltage shift under dynamic load transients. |
Pinout & Package
TL4051C12QDCKR is housed in a 5-pin SC-70 package (DCK). Pin 1 is Cathode, Pin 2 is Anode, Pin 3 is NC (no internal connection), Pin 4 is NC, and Pin 5 is Feedback (FB). Per TI documentation, pins 3 and 4 must be left unconnected; FB is unused in the fixed 1.225 V version but present for family compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Current sink node | Primary regulation terminal; voltage referenced to Anode; sinks all cathode current (IZ). |
| Anode (Pin 2) | Reference ground node | Return path for cathode current; defines 0 V reference for output voltage measurement. |
| NC (Pin 3) | No internal connection | Must remain unconnected; no electrical function or internal bond wire. |
| NC (Pin 4) | No internal connection | Must remain unconnected; no electrical function or internal bond wire. |
| Feedback (Pin 5) | Reference input (unused) | Internally tied to bandgap core; not connected in fixed-output variants; no external bias required. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output capacitor - reduces BOM count and PCB area in space-constrained designs. |
| Low 20 μVRMS noise | Enables <16-bit effective resolution in precision data acquisition without post-filtering. |
| 60 μA minimum cathode current | Supports operation in energy-harvesting and coin-cell-powered applications with sub-100 μA system budgets. |
| ±50 ppm/°C tempco | Guarantees <±1.5 mV total drift over full automotive temperature range - suitable for AEC-Q100-adjacent designs. |
| SC-70-5 package | 0.65 mm pitch, 2.0 × 1.25 mm footprint - enables high-density routing on compact PCBs. |
Applications
| Battery-Powered Instrumentation | Automotive Power-Supply Monitor |
|---|---|
Use Scenario: Portable multimeter measuring DC voltage with 0.1% accuracy requirement. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for 16-bit SAR ADC and digital calibration engine. Use Value: Enables single-supply operation from 3.3 V Li-ion cell while maintaining full-scale error <0.5 LSB over temperature. |
Use Scenario: Engine control unit monitoring 12 V battery rail during cold cranking (down to 6 V). IC Role / Device Role / Timing Role: Serves as precision reference for window comparator detecting undervoltage/overvoltage faults. Use Value: Delivers consistent trip points across –40°C to 125°C without recalibration, meeting ISO 16750-2 pulse test requirements. |
| Industrial Process Transmitter | Energy Meter Reference Subsystem |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in hazardous locations. IC Role / Device Role / Timing Role: Supplies reference voltage for current-loop DAC and sensor signal conditioning amplifier. Use Value: Maintains 0.5% linearity over 16-hour continuous operation with <120 ppm long-term stability. |
Use Scenario: Class 0.5 polyphase electricity meter requiring metrology-grade voltage reference. IC Role / Device Role / Timing Role: Sets gain and offset for 24-bit delta-sigma ADC measuring mains voltage. Use Value: Contributes <±0.02% error to overall meter accuracy budget, validated per IEC 62053-21. |
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 | 1.2 V output, ±0.2% initial tolerance, 50 ppm/°C, SOT-23-3, 50 μA min IZ | Higher initial accuracy but narrower temp range (–40°C to 125°C not guaranteed; rated –40°C to 105°C) | Select when tighter initial tolerance is prioritized over extended-temperature qualification. |
| LM4040C12IDCKR | 1.225 V output, ±0.5% tolerance, 100 ppm/°C, SC-70-5, 60 μA min IZ, 35 μVRMS noise | Higher tempco and noise; lower dynamic impedance (0.3 Ω); same package and pinout | Choose for cost-sensitive designs where 50 ppm/°C and 20 μVRMS are non-negotiable. |
Compared with REF3012AIDBZR and LM4040C12IDCKR, TL4051C12QDCKR uniquely delivers C-grade accuracy with automotive-grade temperature range and lowest noise in its SC-70 footprint-making it optimal for high-reliability, low-drift embedded sensing.
Availability
TL4051C12QDCKR is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive power-supply monitors, and industrial process transmitters requiring stable component supply with guaranteed extended-temperature performance.
Supply support for TL4051C12QDCKR 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-qualified components.
The TL4051 series was designed specifically for micropower, high-accuracy shunt reference applications in portable, industrial, and automotive systems where space, power, and thermal stability are critical constraints.
FAQ
What is the maximum cathode current rating for TL4051C12QDCKR?
The absolute maximum cathode current for TL4051C12QDCKR is 20 mA, but the recommended operating range is 60 μA to 12 mA. Operating above 12 mA risks exceeding thermal limits in the SC-70 package, especially at elevated ambient temperatures. The device's thermal impedance is 252 °C/W, so sustained 12 mA at 125°C ambient requires careful board-level thermal design.
Does TL4051C12QDCKR require an output capacitor for stability?
No, TL4051C12QDCKR does not require an output capacitor and is explicitly characterized as stable with all capacitive loads. This eliminates the need for external bypassing, simplifying layout and reducing bill-of-materials cost. If added for EMI filtering, any ceramic capacitor value may be used without risk of oscillation.
How does the feedback (FB) pin function in TL4051C12QDCKR?
In TL4051C12QDCKR, the FB pin (Pin 5) is internally connected to the bandgap reference core but is unused in the fixed 1.225 V configuration. It has no external function and must be left unconnected. This pin exists for mechanical and pinout compatibility with adjustable TL4051x variants, not for user access.
What is the long-term stability specification for TL4051C12QDCKR?
TL4051C12QDCKR exhibits 120 ppm long-term stability after 1000 hours of operation at 25°C with 100 μA cathode current. This value represents typical parametric drift under accelerated life testing conditions and supports reliability planning for 10+ year field deployments in industrial and automotive applications.
Is TL4051C12QDCKR pin-compatible with other SC-70 shunt references?
TL4051C12QDCKR uses a 5-pin SC-70 (DCK) package with unique pin 3 and pin 4 designated as NC. It is not pin-compatible with 3-pin SC-70 shunt references like LM4040 or REF30xx, nor with 5-pin adjustable variants that utilize the FB pin. Layout reuse requires verification against TI's DCK mechanical drawing SLMS194.
TL4051C12QDCKR 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:
- 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:
- SC-70-5
TL4051C12QDCKR FAQ
1.How can I place an order for TL4051C12QDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051C12QDCKR 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 TL4051C12QDCKR reliable?
The price and inventory of TL4051C12QDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051C12QDCKR is usually 5 days.
3.What payment methods are accepted for TL4051C12QDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051C12QDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051C12QDCKR?
TL4051C12QDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051C12QDCKR 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 TL4051C12QDCKR?
For technical support, including TL4051C12QDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051C12QDCKR requirements.
6.How does Aetrix verify that TL4051C12QDCKR is sourced from the original manufacturer or authorized distributors?
All TL4051C12QDCKR 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 TL4051C12QDCKR meets industry standards.
7.What is the process for return or replacement of TL4051C12QDCKR?
All TL4051C12QDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051C12QDCKR, 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 TL4051C12QDCKR part is unused and in its original packaging.
Return procedure for TL4051C12QDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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