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Texas Instruments TL4051AIDCKR
- Part No.:
- TL4051AIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051AIDCKR.pdf
- Description:
- IC VREF SHUNT ADJ 0.1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,506
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Product details
Overview
TL4051AIDCKR 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, battery-powered instrumentation, and power-supply monitoring circuits.
For engineers reviewing the TL4051AIDCKR datasheet, TL4051AIDCKR pinout, TL4051AIDCKR application, or TL4051AIDCKR equivalent, key selection criteria include initial tolerance, thermal drift performance, low-noise operation at micropower currents, and compatibility with capacitive loads without external stabilization.
Technical Context
The TL4051AIDCKR implements a bandgap-based shunt reference architecture with internal feedback and trimming for tight initial accuracy and low temperature drift. Its design enables stable regulation with no output capacitor required and supports all capacitive load conditions.
It features a 3-terminal SC-70 package configuration (CATHODE, ANODE, FB) where the FB pin enables adjustable versions; however, TL4051AIDCKR is the fixed 1.225V variant, so FB is internally connected and unused externally. The device maintains <0.5Ω dynamic impedance at 1mA and exhibits 120ppm long-term stability after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V ±0.1% at 25°C - ensures precise biasing for ADCs, DACs, and sensor signal chains |
| Initial Accuracy | ±0.1% max (A grade) - enables high-resolution measurement systems without calibration |
| Temp Coefficient | 50ppm/°C max - guarantees ≤0.625mV drift over –40°C to 85°C ambient range |
| Output Noise | 20μVRMS (10Hz–10kHz) - minimizes error in precision analog front-ends |
| Cathode Current Range | 60μA to 12mA - supports ultra-low-power portable designs and higher-current regulation |
| Dynamic Impedance | 0.5Ω at 1mA - provides strong rejection of supply ripple and load transients |
| Long-Term Stability | 120ppm (1000h @ 25°C) - ensures consistent reference performance over product lifetime |
Pinout & Package
TL4051AIDCKR is housed in a 5-pin SC-70 (DCK) package with three active terminals: CATHODE (Pin 1), ANODE (Pin 2), and FB (Pin 3). Pins 4 and 5 are NC (no connection) and must remain unconnected. The FB pin is internally tied to the reference node and not accessible in the fixed-output variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (CATHODE) | Reference output node | Current-sinking terminal; connects to regulated voltage node and sets output via external series resistor |
| Pin 2 (ANODE) | Ground reference | Low-impedance return path; must be connected to system ground or lowest potential point |
| Pin 3 (FB) | Internal reference tap | Internally connected to bandgap core; not user-accessible in TL4051AIDCKR (fixed 1.225V version) |
| Pins 4 & 5 | No connection | Unused; must be left floating - no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost, PCB area, and layout sensitivity |
| Micropower operation | 60μA typical minimum cathode current - extends battery life in portable and IoT sensors |
| Low thermal hysteresis | 0.36mV/V over –40°C ↔ 125°C cycling - preserves accuracy after thermal stress in industrial environments |
| High ESD robustness | ±2000V HBM - withstands handling and board-level assembly without special precautions |
| Wide operating current range | 60μA to 12mA - accommodates both ultra-low-power sleep modes and active high-precision measurement phases |
Applications
| Portable Data Loggers | Industrial Power-Supply Monitors |
|---|---|
|
Use Scenario: Battery-powered environmental sensor nodes logging temperature, humidity, and pressure with 16-bit ADCs. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for ADC conversion and sensor excitation. Use Value: Enables ±0.01% measurement repeatability over temperature and battery discharge cycles due to 50ppm/°C drift and 0.1% initial tolerance. |
Use Scenario: Real-time monitoring of 3.3V/5V/12V rails in PLC power modules with fault reporting. IC Role / Device Role / Timing Role: Serves as precision shunt reference in comparator-based overvoltage/undervoltage detection circuitry. Use Value: Delivers reliable trip-point accuracy under varying load and ambient conditions, supported by low dynamic impedance (0.5Ω) and noise immunity. |
| Medical Instrumentation | Energy Metering Front-Ends |
|
Use Scenario: Portable ECG and pulse oximetry devices requiring low-noise analog signal conditioning. IC Role / Device Role / Timing Role: Supplies clean, low-drift reference for op-amp gain stages and ADC reference inputs. Use Value: 20μVRMS noise floor prevents degradation of microvolt-level biopotential signals during digitization. |
Use Scenario: Class 0.2 and 0.5 electricity meters measuring voltage and current channels with metrology-grade ADCs. IC Role / Device Role / Timing Role: Acts as primary voltage reference for polyphase energy measurement ICs (e.g., ADE7953, MCP3911). Use Value: 120ppm long-term stability ensures meter calibration remains valid over 10+ years without field recalibration. |
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 TL4051AIDCKR's 5-pin SC-70) | Lacks FB pin; lower initial accuracy but smaller footprint and lower cost | Select when 1.2V suffices and space constraints favor 3-pin SC-70; verify 0.2% tolerance meets system error budget |
| LM4040A12IDCKR | Fixed 1.2V output, ±0.1% initial accuracy, 100ppm/°C, SC-70-5 package, 60μA–15mA range | Higher tempco (100ppm/°C vs 50ppm/°C); same pin count but different pinout (CATHODE/ANODE/NC) | Choose if tighter initial tolerance is critical but thermal drift is less constrained; confirm layout compatibility with LM4040 pin mapping |
Compared with REF3012AIDBZR and LM4040A12IDCKR, TL4051AIDCKR uniquely delivers 1.225V output with A-grade 0.1% accuracy and 50ppm/°C drift in a 5-pin SC-70 - making it optimal for systems requiring exact 1.225V references (e.g., legacy ADCs, calibrated sensor bridges) where thermal stability dominates over footprint.
Availability
TL4051AIDCKR is available at Aetrix Electronics and suitable for portable instrumentation, industrial power-supply monitors, and medical sensor applications requiring stable component supply, long-term calibration integrity, and extended temperature operation.
Supply support for TL4051AIDCKR 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 industrial-grade components.
The TL4051 series belongs to TI's precision voltage reference product line, designed specifically for high-accuracy, low-power, and thermally stable applications in data acquisition, test equipment, and energy metering systems.
FAQ
What is the output voltage tolerance and temperature coefficient of TL4051AIDCKR?
TL4051AIDCKR has a fixed 1.225V output with ±0.1% maximum initial tolerance at 25°C and a maximum average temperature coefficient of 50ppm/°C over –40°C to 85°C. These values are guaranteed per the A-grade specification in the official TI datasheet SLOS487A.
Does TL4051AIDCKR require an external output capacitor for stability?
No, TL4051AIDCKR does not require an external output capacitor. It is explicitly designed to remain stable with all capacitive loads, including direct connection to large bulk capacitance on the cathode node - eliminating the need for bypass caps in most implementations.
What is the minimum cathode current needed for proper operation of TL4051AIDCKR?
The minimum cathode current for TL4051AIDCKR is 60μA (typical) and 65μA (max over temperature). Operation below this current may result in degraded accuracy or loss of regulation, especially at temperature extremes.
How is the FB pin used in TL4051AIDCKR?
In TL4051AIDCKR, the FB pin (Pin 3) is internally connected to the reference node and not accessible for external adjustment. This part is the fixed 1.225V variant; only adjustable versions (e.g., TL4051AIxxx) expose FB for external resistor-divider programming.
What package type and pin count does TL4051AIDCKR use?
TL4051AIDCKR uses the SC-70-5 (DCK) package with five physical pins. Only Pins 1 (CATHODE), 2 (ANODE), and 3 (FB) are functional; Pins 4 and 5 are no-connect and must remain unconnected on the PCB.
TL4051AIDCKR 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:
- ±0.1%
- 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
TL4051AIDCKR FAQ
1.How can I place an order for TL4051AIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051AIDCKR 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 TL4051AIDCKR reliable?
The price and inventory of TL4051AIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051AIDCKR is usually 5 days.
3.What payment methods are accepted for TL4051AIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051AIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051AIDCKR?
TL4051AIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051AIDCKR 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 TL4051AIDCKR?
For technical support, including TL4051AIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051AIDCKR requirements.
6.How does Aetrix verify that TL4051AIDCKR is sourced from the original manufacturer or authorized distributors?
All TL4051AIDCKR 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 TL4051AIDCKR meets industry standards.
7.What is the process for return or replacement of TL4051AIDCKR?
All TL4051AIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051AIDCKR, 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 TL4051AIDCKR part is unused and in its original packaging.
Return procedure for TL4051AIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051AIDCKR Tags
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TL431AIDBZR
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TL431BQDBZR
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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AZ431LBNTR-G1
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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