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Texas Instruments TL4051A12IDCKR
- Part No.:
- TL4051A12IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051A12IDCKR.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
TL4051A12IDCKR 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 operates across –40°C to 85°C and is used in high-accuracy data acquisition systems where low drift and minimal power consumption are critical.
For engineers reviewing the TL4051A12IDCKR datasheet, TL4051A12IDCKR pinout, TL4051A12IDCKR application, or TL4051A12IDCKR equivalent, key selection considerations include its SC-70-5 package, guaranteed 39μA minimum cathode current, thermal hysteresis of 0.36mV/V, reverse dynamic impedance of 0.5Ω at 1mA, and compatibility with all capacitive loads without requiring an output capacitor.
Technical Context
The TL4051A12IDCKR implements a bandgap-based shunt reference architecture optimized for micropower operation and low-noise performance. Its internal circuitry maintains regulation by sinking variable cathode current while holding the cathode-to-anode voltage at precisely 1.225V under defined load and temperature conditions.
It features a dedicated feedback node only in adjustable variants; the TL4051A12IDCKR is fixed-output and uses only cathode and anode terminals. The device exhibits stable behavior across its full operating current range and requires no external compensation, even with large capacitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V nominal; enables precise 1.2V system biasing and ADC reference scaling |
| Initial Accuracy | ±0.1% max at 25°C; ensures <12.25mV absolute error in calibration-critical circuits |
| Temp Coefficient | ±50ppm/°C max over –40°C to 85°C; contributes ≤0.55mV drift across full industrial range |
| Output Noise | 20μVRMS (10Hz–10kHz); supports high-resolution analog measurements without added filtering |
| Cathode Current Range | 60μA (typ) to 12mA; allows ultra-low-power sensor interfaces and robust supply monitoring |
| Dynamic Impedance | 0.5Ω at 1mA, 120Hz; minimizes output voltage perturbation during transient load changes |
| Thermal Hysteresis | 0.36mV/V; limits memory-induced offset after thermal cycling between –40°C and 125°C |
Pinout & Package
TL4051A12IDCKR 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 Anode - with Pins 2 and 5 internally shorted. This dual-anode configuration improves thermal dissipation and layout flexibility in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (CATHODE) | Reference output node | Sinks regulated current; voltage at this pin is held at 1.225V relative to anode |
| Pins 2 & 5 (ANODE) | Reference return and power ground | Internally connected; must be tied to system ground or low-impedance return path |
| Pins 3 & 4 (NC) | No internal connection | Not bonded; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.225V output | Eliminates external resistor divider, reducing BOM count and layout sensitivity in compact systems |
| No output capacitor required | Enables direct integration into battery-powered devices without stability risk or board area penalty |
| Stable with all capacitive loads | Supports direct connection to ADC input caps, LDO bypasses, or long PCB traces without phase margin loss |
| Low 60μA typical operating current | Extends battery life in portable instrumentation and wireless sensor nodes beyond 10 years at μA-level draws |
| SC-70-5 thermal performance | 252°C/W θJA enables >100mW power dissipation in ambient air, suitable for moderate-current references |
Applications
| Portable Precision Data Acquisition | Industrial Power-Supply Monitoring |
|---|---|
Use Scenario: Battery-powered handheld multimeter measuring mV-level signals with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for ADC full-scale calibration and offset nulling. Use Value: ±0.1% accuracy and 20μVRMS noise ensure <0.001% measurement uncertainty without post-calibration trimming. |
Use Scenario: PLC analog input module monitoring 24V DC supply rail for brownout detection. IC Role / Device Role / Timing Role: Serves as precision threshold reference for comparator-based undervoltage lockout. Use Value: 50ppm/°C drift guarantees consistent trip point across –40°C to 85°C ambient, eliminating field recalibration. |
| Automotive Cabin Sensor Interface | Energy Meter Reference Subsystem |
Use Scenario: Occupant detection system using thermopile sensors in vehicle seat cushion. IC Role / Device Role / Timing Role: Supplies low-noise bias voltage to op-amp front-end amplifying microvolt-level thermal signals. Use Value: 20μVRMS noise floor preserves signal integrity below 1μV, enabling sub-0.1°C temperature resolution. |
Use Scenario: Class 0.2 smart electricity meter requiring metrology-grade voltage reference for ADC and DAC paths. IC Role / Device Role / Timing Role: Delivers primary reference for both energy measurement and communication IC biasing. Use Value: 120ppm long-term stability over 1000h ensures <0.012% gain drift per year, meeting 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% initial accuracy, 50ppm/°C, SOT-23-3, 50μA min cathode current | Higher minimum current requirement; less suitable for sub-60μA ultra-low-power designs | Select when SOT-23-3 footprint is preferred and 0.2% tolerance is acceptable |
| ADR3412ARJZ-R7 | 1.2V output, ±0.1% accuracy, 30ppm/°C, SOT-23-5, 100μA min cathode current, higher cost | Lower tempco but higher quiescent current; not drop-in due to different pinout and marking | Choose for tighter thermal drift budgets where 30ppm/°C is mandatory and layout can accommodate SOT-23-5 |
Compared with REF3012AIDBZR and ADR3412ARJZ-R7, the TL4051A12IDCKR offers the lowest minimum cathode current (39μA) and smallest SC-70-5 footprint among A-grade 1.2V shunt references, making it optimal for space- and power-constrained industrial and automotive sensing nodes.
Availability
TL4051A12IDCKR is available at Aetrix Electronics and suitable for portable precision data acquisition, industrial power-supply monitoring, and automotive cabin sensor interface applications requiring stable component supply, long-term calibration integrity, and extended temperature operation.
Supply support for TL4051A12IDCKR 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 series was designed specifically for micropower, high-accuracy shunt reference applications where ultra-low drift, minimal noise, and capacitor-free stability are essential - targeting portable instrumentation, energy metering, and safety-critical sensor conditioning.
FAQ
What is the operating temperature range for TL4051A12IDCKR?
The TL4051A12IDCKR is rated for industrial temperature operation from –40°C to +85°C. This range is validated per the TI datasheet Section 5.4 and applies across all electrical specifications including initial accuracy, temperature coefficient, and dynamic impedance. The device is not qualified for extended temperature (–40°C to 125°C) operation - that rating applies only to Q-grade variants like TL4051A12QDCKR.
Does TL4051A12IDCKR require an output capacitor for stability?
No, TL4051A12IDCKR does not require an output capacitor for stability. As confirmed in Section 7.1 of the datasheet, the device is designed to remain stable with all capacitive loads, including direct connection to large ceramic or tantalum bypass capacitors. This eliminates the need for external compensation components and simplifies layout in space-constrained applications.
What is the minimum cathode current needed for TL4051A12IDCKR to maintain regulation?
The TL4051A12IDCKR requires a minimum cathode current of 39μA (max) across temperature to maintain regulation, as specified in Section 5.4 of the datasheet. At 25°C, typical minimum current is 60μA. Designers must ensure the external current-setting resistor provides ≥39μA under worst-case conditions (e.g., minimum supply voltage and maximum load current).
How does thermal hysteresis affect TL4051A12IDCKR performance?
TL4051A12IDCKR exhibits 0.36mV/V thermal hysteresis, defined as the voltage shift observed at 25°C after cycling between –40°C and 125°C. For its 1.225V output, this translates to a maximum hysteresis error of ~0.44mV. This parameter is critical in applications involving repeated thermal cycling, such as automotive ECUs or outdoor industrial controllers, where repeatable calibration is required.
Can TL4051A12IDCKR be used in place of adjustable TL4051 variants?
No, TL4051A12IDCKR cannot substitute for adjustable TL4051 variants (e.g., TL4051AIDCKR) because it lacks the feedback (FB) pin and internal reference structure required for external resistor-divider programming. The TL4051A12IDCKR is a fixed-output device with only cathode and anode terminals - attempting to force adjustability would result in loss of regulation or damage.
TL4051A12IDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Bulk
- 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
TL4051A12IDCKR FAQ
1.How can I place an order for TL4051A12IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051A12IDCKR 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 TL4051A12IDCKR reliable?
The price and inventory of TL4051A12IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051A12IDCKR is usually 5 days.
3.What payment methods are accepted for TL4051A12IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051A12IDCKR transactions.
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4.How is shipping managed for TL4051A12IDCKR?
TL4051A12IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051A12IDCKR 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 TL4051A12IDCKR?
For technical support, including TL4051A12IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051A12IDCKR requirements.
6.How does Aetrix verify that TL4051A12IDCKR is sourced from the original manufacturer or authorized distributors?
All TL4051A12IDCKR 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 TL4051A12IDCKR meets industry standards.
7.What is the process for return or replacement of TL4051A12IDCKR?
All TL4051A12IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051A12IDCKR, 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 TL4051A12IDCKR part is unused and in its original packaging.
Return procedure for TL4051A12IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051A12IDCKR Tags
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