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Texas Instruments TL4051B12QDCKR
- Part No.:
- TL4051B12QDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051B12QDCKR.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,760
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Product details
Overview
TL4051B12QDCKR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.2% initial accuracy (B grade), 50ppm/°C temperature coefficient, 20μVRMS wideband noise, and operation across –40°C to 125°C. It serves as a stable voltage reference in high-accuracy data acquisition, battery-powered instrumentation, and automotive power-supply monitors.
For engineers reviewing the TL4051B12QDCKR datasheet, TL4051B12QDCKR pinout, TL4051B12QDCKR application, or TL4051B12QDCKR equivalent, key selection factors include its extended-temperature qualification, ultra-low 60μA typical cathode current requirement, stability with all capacitive loads, and SC-70-5 package compatibility for space-constrained designs.
Technical Context
The TL4051B12QDCKR implements a bandgap-based shunt reference architecture optimized for low quiescent current and minimal thermal drift. Its internal circuitry maintains regulation via cathode-anode reverse breakdown, with feedback path integrated into the die for precise 1.225V output without external components.
It operates over a 60μA–12mA cathode current range and delivers stable performance under varying load capacitance - eliminating need for output bypass capacitors while maintaining <0.5Ω dynamic impedance at 1mA and 120Hz. Thermal hysteresis is specified at 0.36mV/V over –40°C to 125°C cycling.
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 tolerance. |
| Initial Accuracy | ±0.2% max at 25°C (B grade); ensures system-level calibration stability without post-manufacture trimming. |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C; supports high-precision measurement in automotive and industrial environments. |
| Noise (10Hz–10kHz) | 20μVRMS typical; minimizes voltage perturbation in sensitive ADC reference and audio bias applications. |
| Min Cathode Current | 60μA typical; allows operation from microamp-level supplies in energy-harvesting and ultra-low-power IoT nodes. |
| Dynamic Impedance | 0.5Ω at 1mA, 120Hz; provides fast transient response and low output impedance for driving ADC reference inputs. |
| Operating Temp Range | –40°C to 125°C (Q-grade); qualified for under-hood automotive, motor control, and industrial edge computing. |
Pinout & Package
TL4051B12QDCKR is packaged in SC-70-5 (DCK), a 5-pin surface-mount package with 0.65mm pitch and exposed pad for thermal enhancement. Pin 1 is Cathode, Pin 2 is Anode, Pin 3 is NC (no internal connection; must be left floating or tied to Anode per EMI guidance), Pin 4 is NC, Pin 5 is Feedback (FB) - though unused in fixed-output variants like TL4051B12QDCKR.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Connects to regulated 1.225V output; sinks cathode current (60μA–12mA) to maintain voltage regulation. |
| Anode (Pin 2) | Ground/reference return | Common return path for cathode current; must be connected to system ground or low-impedance reference plane. |
| NC (Pin 3) | No internal connection | Must remain unconnected or tied to Anode per TI EMI mitigation guidance; not functional in fixed-output mode. |
| NC (Pin 4) | No internal connection | Unused terminal; no electrical function; leave unconnected per datasheet layout guidance. |
| FB (Pin 5) | Adjustable reference input | Internally tied to bandgap core; inactive in fixed 1.225V variants - no external connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates mandatory output capacitor, reducing BOM count and PCB area in compact sensor nodes and portable meters. |
| Ultra-low 60μA typical cathode current | Enables use in battery-operated systems with multi-year runtime, including smart utility meters and wireless sensor transceivers. |
| 50ppm/°C tempco over full range | Ensures ≤0.625mV drift across –40°C to 125°C, critical for uncalibrated field instruments and automotive engine control modules. |
| 20μVRMS broadband noise | Supports 16-bit+ ADC accuracy without additional filtering; suitable for precision weigh scales and medical analog front-ends. |
| SC-70-5 package (2.0 × 1.25 × 0.9 mm) | Provides 30% smaller footprint than SOT-23-3 while maintaining thermal performance via exposed pad for heatsinking. |
Applications
| Automotive Power-Supply Monitor | Portable Precision Data Logger |
|---|---|
Use Scenario: Monitoring 12V battery rail in ADAS ECUs during cold cranking and load-dump events. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225V reference for ADC-based voltage sensing circuitry. Use Value: ±0.2% accuracy and –40°C to 125°C operation ensure consistent measurement across vehicle lifetime and environmental extremes. |
Use Scenario: Battery-powered environmental sensor node logging temperature/humidity with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Low-noise, micropower reference enabling high-resolution analog-to-digital conversion without depleting coin-cell energy. Use Value: 20μVRMS noise and 60μA cathode current minimize signal corruption and extend operational life beyond 5 years. |
| Industrial Process Controller | Energy Meter Reference Subsystem |
Use Scenario: Analog input module in PLC measuring 4–20mA loop signals with galvanic isolation. IC Role / Device Role / Timing Role: Isolated-side reference source for isolated ΣΔ ADC, rejecting common-mode noise on field wiring. Use Value: 50ppm/°C tempco and 0.36mV/V thermal hysteresis maintain calibration integrity across factory floor temperature swings. |
Use Scenario: Revenue-grade electricity meter requiring metrology-grade voltage reference for polyphase energy calculation. IC Role / Device Role / Timing Role: Primary reference for anti-aliasing filter and ADC in Class 0.2 metering IC interface. Use Value: Long-term stability of 120ppm over 1000 hours ensures compliance with IEC 62053-21 accuracy requirements. |
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% accuracy, 50ppm/°C, SOT-23-3, 50μA min current, but only rated –40°C to 85°C. | Limited to industrial ambient; unsuitable for under-hood automotive or high-temp industrial enclosures. | Choose when cost sensitivity outweighs extended temperature need and SC-70 footprint is not required. |
| ADR3412ARJZ-R7 | 1.2V output, ±0.1% accuracy, 30ppm/°C, 12μA max supply current, but requires 1.8V+ supply and is series-type (not shunt). | Not a drop-in shunt replacement; demands different topology, higher minimum supply voltage, and external capacitor. | Select only if system already uses series references and tighter initial accuracy justifies redesign effort and cost premium. |
Compared with REF3012AIDBZR and ADR3412ARJZ-R7, TL4051B12QDCKR uniquely combines Q-grade temperature range, SC-70-5 packaging, and true shunt topology - enabling direct integration into existing 1.2V reference circuits without layout changes or supply voltage adjustments.
Availability
TL4051B12QDCKR is available at Aetrix Electronics and suitable for automotive power-supply monitoring, portable precision data loggers, and industrial process controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL4051B12QDCKR 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TL4051 product line was designed specifically for precision, low-power shunt reference applications where space, thermal performance, and extended-temperature reliability are critical - targeting automotive subsystems, portable instrumentation, and energy metering.
FAQ
What is the operating temperature range of the TL4051B12QDCKR?
The TL4051B12QDCKR is qualified for operation from –40°C to 125°C, meeting the extended temperature requirements of automotive under-hood applications and industrial control systems. This Q-grade rating is confirmed in Section 5.5 of the TI datasheet and distinguishes it from I-grade variants limited to –40°C to 85°C.
Does the TL4051B12QDCKR require an output capacitor?
No, the TL4051B12QDCKR does not require an output capacitor for stability. As stated in Section 7.1 of the datasheet, it is designed to remain stable with all capacitive loads - including zero capacitance - making it ideal for space-constrained and ultra-low-power designs where minimizing passive components is essential.
What is the minimum cathode current needed for regulation in TL4051B12QDCKR?
The TL4051B12QDCKR requires a minimum cathode current of 60μA (typical) and 65μA (max over temperature) to maintain regulation. This value is specified in Table 5.5 under "IZ,min" and enables reliable operation in micropower systems such as battery-backed sensors and energy-harvesting nodes.
How does the TL4051B12QDCKR differ from adjustable TL4051 variants?
The TL4051B12QDCKR is a fixed-output variant with 1.225V nominal voltage and no functional FB pin. Adjustable versions (e.g., TL4051BQDCKR) use the FB pin to set output via external resistors and exhibit different electrical characteristics - including higher ΔVREF/ΔVKA sensitivity below 2.5V. The TL4051B12QDCKR simplifies design by eliminating external resistor networks and associated layout complexity.
Is the TL4051B12QDCKR pin-compatible with other SC-70-5 shunt references?
No - TL4051B12QDCKR has a unique 5-pin SC-70 configuration with two NC pins and an inactive FB pin, differing from standard 3-pin shunt references. Direct pin compatibility is not claimed; layout adaptation is required when replacing devices such as REF3012 or LM4040 in SC-70-3 packages due to differing pin count and assignment.
TL4051B12QDCKR 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:
- ±0.2%
- 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
TL4051B12QDCKR FAQ
1.How can I place an order for TL4051B12QDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051B12QDCKR 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 TL4051B12QDCKR reliable?
The price and inventory of TL4051B12QDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051B12QDCKR is usually 5 days.
3.What payment methods are accepted for TL4051B12QDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051B12QDCKR transactions.
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4.How is shipping managed for TL4051B12QDCKR?
TL4051B12QDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051B12QDCKR 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 TL4051B12QDCKR?
For technical support, including TL4051B12QDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051B12QDCKR requirements.
6.How does Aetrix verify that TL4051B12QDCKR is sourced from the original manufacturer or authorized distributors?
All TL4051B12QDCKR 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 TL4051B12QDCKR meets industry standards.
7.What is the process for return or replacement of TL4051B12QDCKR?
All TL4051B12QDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051B12QDCKR, 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 TL4051B12QDCKR part is unused and in its original packaging.
Return procedure for TL4051B12QDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051B12QDCKR Tags
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