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Texas Instruments TL4051AIDCKT
- Part No.:
- TL4051AIDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051AIDCKT.pdf
- Description:
- IC VREF SHUNT ADJ 0.1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,771
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Product details
Overview
TL4051AIDCKT from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±0.1% initial accuracy (A grade), 50 ppm/°C temperature coefficient, 20 μVRMS wideband noise, and stable operation from 60 μA to 12 mA 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 TL4051AIDCKT datasheet, TL4051AIDCKT pinout, TL4051AIDCKT application, or TL4051AIDCKT equivalent, key selection criteria include its low-noise shunt topology, SOT-23-3 package compatibility, guaranteed minimum cathode current of 60 μA (typical), and absence of required output capacitance - critical for space-constrained, low-power analog signal chains.
Technical Context
The TL4051AIDCKT implements a bandgap-based shunt reference architecture with internal feedback and trimming for tight initial tolerance and low thermal drift. Its dynamic impedance remains ≤0.5 Ω at 1 mA (120 Hz), enabling stable regulation under varying load conditions without external compensation.
It features a dedicated cathode-anode configuration with no separate reference or feedback pins - unlike adjustable variants - and requires no output capacitor due to inherent stability with all capacitive loads, simplifying layout in sensitive measurement systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V - provides stable reference for ADCs, DACs, and comparators without external resistors. |
| Initial Accuracy | ±0.1% max at 25°C - ensures minimal calibration burden in precision sensor interfaces and metering applications. |
| Temp Coefficient | 50 ppm/°C max - maintains <±0.5 mV drift over –40°C to +85°C, suitable for industrial-grade instrumentation. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz) - supports high-resolution (≥16-bit) data acquisition without added filtering. |
| Cathode Current Range | 60 μA (typ) to 12 mA - enables ultra-low-power operation (e.g., 1.225 V @ 60 μA = 73.5 μW) and robust drive capability. |
| Dynamic Impedance | 0.5 Ω at 1 mA - minimizes output voltage perturbation during transient load changes in regulated supplies. |
| Long-Term Stability | 120 ppm (1000 h) - ensures reference integrity over product lifetime without recalibration. |
Pinout & Package
TL4051AIDCKT is housed in a 5-pin SC-70 package (DCK), but functions as a 3-terminal shunt device: Cathode (Pin 1), Anode (Pin 2), and NC (Pin 3). Pin 4 and Pin 5 are internally unused and must be left unconnected per TI documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Connected to supply rail via series resistor; sinks current to maintain precise 1.225 V across load. |
| Anode (Pin 2) | Ground reference terminal | Must be tied to system ground; forms return path for cathode current and defines reference potential. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; electrically isolated - no routing or grounding required on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.225 V output | Eliminates external resistor divider, reducing BOM count and layout sensitivity in compact designs. |
| Stable with all capacitive loads | Removes need for output bypass capacitor - critical for noise-sensitive applications like audio and metrology. |
| Low 60 μA typical operating current | Enables multi-year battery life in portable sensors and IoT edge nodes powered by coin cells or energy harvesters. |
| SC-70 package (2.0 × 1.25 mm) | Reduces board area by >30% vs. SOT-23-3 while maintaining thermal performance (θJA = 252°C/W). |
| Industrial temperature range | Validated operation from –40°C to +85°C ensures reliability in automotive cabin modules and factory automation hardware. |
Applications
| Data Acquisition Systems | Power-Supply Monitors |
|---|---|
|
Use Scenario: High-resolution (16–24-bit) SAR and delta-sigma ADC front-ends in portable multimeters and environmental sensors. IC Role / Device Role / Timing Role: Provides stable, low-noise reference voltage for ADC conversion accuracy and linearity. Use Value: 20 μVRMS noise and ±0.1% tolerance directly enable <±1 LSB error without post-conversion calibration. |
Use Scenario: Real-time monitoring of DC bus voltages in telecom rectifiers and server PSUs. IC Role / Device Role / Timing Role: Shunt reference in comparator-based overvoltage/undervoltage detection circuits. Use Value: Stable 1.225 V threshold with 50 ppm/°C drift ensures consistent trip points across ambient temperature swings. |
| Portable Instrumentation | Battery-Powered Equipment |
|
Use Scenario: Handheld gas analyzers and pH meters requiring microamp-level standby current. IC Role / Device Role / Timing Role: Precision reference for analog front-end gain-setting and offset correction. Use Value: 60 μA typical cathode current allows continuous reference biasing from a CR2032 cell for >5 years. |
Use Scenario: Smart home sensors (temperature, occupancy) using low-power MCUs with integrated ADCs. IC Role / Device Role / Timing Role: External reference for MCU ADC to improve measurement repeatability vs. internal bandgap. Use Value: Fixed 1.225 V output eliminates resistor tolerance errors and improves end-product test yield. |
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 accuracy, 50 ppm/°C, 35 μVRMS noise, SOT-23-3 package | Higher noise and looser tolerance than TL4051AIDCKT; lacks SC-70 option | Choose when SOT-23-3 footprint is mandatory and 1.2 V (vs. 1.225 V) is acceptable for system headroom. |
| ADR3412ARJZ-R7 | 1.2 V output, ±0.1% initial accuracy, 30 ppm/°C, 12 μVRMS noise, SOT-23-5 package | Lower noise and tempco, but higher 100 μA min cathode current and no SC-70 variant | Prefer for ultra-low-drift applications where 100 μA bias current is sustainable and 1.2 V suffices. |
Compared with REF3012AIDBZR and ADR3412ARJZ-R7, TL4051AIDCKT offers the unique combination of 1.225 V output, SC-70 packaging, and sub-100 μA operating current - making it optimal for miniaturized, battery-critical systems where reference voltage headroom and board area are constrained.
Availability
TL4051AIDCKT is available at Aetrix Electronics and suitable for data-acquisition systems, portable instrumentation, and battery-powered equipment requiring stable component supply, long-term calibration integrity, and RoHS-compliant packaging.
Supply support for TL4051AIDCKT 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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and high-volume manufacturing.
The TL4051 series was developed for cost-sensitive, space-constrained applications demanding micropower operation and high initial accuracy - particularly in portable test gear, energy metering, and automotive subsystems.
FAQ
What is the output voltage tolerance of TL4051AIDCKT at 25°C?
The TL4051AIDCKT has a maximum initial output voltage tolerance of ±0.1% at 25°C, corresponding to ±1.225 mV around its nominal 1.225 V output. This A-grade specification is verified across production lots and is documented in Section 5.4 of the TI datasheet SLOS487A.
Does TL4051AIDCKT require an output capacitor for stability?
No, TL4051AIDCKT does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads, including direct connection to ADC input capacitors or long PCB traces - a key advantage over many competing references that mandate minimum 1–10 nF bypassing.
What is the minimum cathode current needed for TL4051AIDCKT to regulate properly?
The TL4051AIDCKT requires a minimum cathode current of 60 μA (typical) and 65 μA (max over temperature) to maintain regulation within specifications. Below this, output voltage may deviate beyond the ±0.1% tolerance band, especially at temperature extremes.
Which package type does TL4051AIDCKT use, and how many pins are functional?
TL4051AIDCKT uses the SC-70-5 (DCK) package, but only three pins are functional: Cathode (Pin 1), Anode (Pin 2), and NC (Pin 3). Pins 4 and 5 are internally unconnected and must remain floating per TI's mechanical documentation and application notes.
Can TL4051AIDCKT operate across the full industrial temperature range?
Yes, TL4051AIDCKT is characterized for continuous operation from –40°C to +85°C. Its 50 ppm/°C maximum temperature coefficient and validated electrical characteristics across this range make it suitable for industrial control panels, outdoor sensor nodes, and automotive cabin electronics.
TL4051AIDCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
TL4051AIDCKT FAQ
1.How can I place an order for TL4051AIDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051AIDCKT 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 TL4051AIDCKT reliable?
The price and inventory of TL4051AIDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051AIDCKT is usually 5 days.
3.What payment methods are accepted for TL4051AIDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051AIDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051AIDCKT?
TL4051AIDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051AIDCKT 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 TL4051AIDCKT?
For technical support, including TL4051AIDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051AIDCKT requirements.
6.How does Aetrix verify that TL4051AIDCKT is sourced from the original manufacturer or authorized distributors?
All TL4051AIDCKT 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 TL4051AIDCKT meets industry standards.
7.What is the process for return or replacement of TL4051AIDCKT?
All TL4051AIDCKT units undergo pre-shipment inspection (PSI). If there is an issue with TL4051AIDCKT, 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 TL4051AIDCKT part is unused and in its original packaging.
Return procedure for TL4051AIDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051AIDCKT Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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