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Texas Instruments TL4051CIDCKR
- Part No.:
- TL4051CIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051CIDCKR.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,796
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Product details
Overview
TL4051CIDCKR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.5% initial accuracy (C 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 TL4051CIDCKR datasheet, TL4051CIDCKR pinout, TL4051CIDCKR application, or TL4051CIDCKR equivalent, this page delivers verified specifications, package mapping to SC-70 (DCK), functional pin roles, real-world use cases, and validated alternative options for industrial and portable designs requiring low-drift, low-noise voltage references.
Technical Context
The TL4051CIDCKR implements a bandgap-based shunt reference architecture with internal feedback control, delivering a stable 1.225V output without external capacitors. Its dynamic impedance is 0.5Ω at 1mA/120Hz, and it maintains <±10.1mV total output variation over full temperature and current range.
Designed for adjustable or fixed-voltage configurations, the C-grade variant targets cost-sensitive applications where ±0.5% initial tolerance and 50ppm/°C drift are acceptable. It features 70–150nA feedback current and supports output voltages up to 10V when configured as adjustable, though TL4051CIDCKR itself is the fixed 1.225V version in SC-70 packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V - provides stable reference for ADCs, DACs, and comparators without external resistors. |
| Initial Accuracy | ±0.5% max (C grade) - ensures ≤6.13mV absolute error at 25°C for calibration-critical systems. |
| Temp Coefficient | 50ppm/°C max - contributes ≤0.41mV drift over –40°C to 85°C ambient range. |
| Output Noise | 20μVRMS (10Hz–10kHz) - minimizes signal corruption in precision analog front-ends. |
| Cathode Current Range | 60μA to 12mA - enables ultra-low-power sensor nodes and robust operation under varying load conditions. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and metering. |
| Dynamic Impedance | 0.5Ω at 1mA - maintains tight regulation despite rapid load transients in switching power supplies. |
Pinout & Package
TL4051CIDCKR is packaged in SC-70 (DCK), a 5-pin surface-mount package with 1.25mm × 2.1mm footprint and 0.65mm pitch. Pin 1 is Cathode, Pin 2 is Anode, Pin 3 is NC (no connection, must be left floating or tied to Anode per TI guidance), Pins 4–5 are unused thermal pads (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Source of regulated 1.225V; connects to external resistor and load; carries total cathode current (IZ + IL). |
| Anode (Pin 2) | Ground reference terminal | Return path for cathode current; must be connected to system ground or low-impedance return plane. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; TI recommends leaving floating or tying to Anode to reduce EMI susceptibility near transformers or switching noise sources. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with all capacitive loads - eliminates BOM cost and layout area for bypass caps in space-constrained portable designs. |
| Ultra-low minimum cathode current | 60μA typical - enables operation from microamp-level bias sources, extending battery life in IoT sensors. |
| Low dynamic impedance | 0.5Ω at 1mA - suppresses output perturbation during fast load steps, critical for SAR ADC reference stability. |
| Low wideband noise | 20μVRMS (10Hz–10kHz) - preserves SNR in 16-bit+ data converters without additional filtering. |
| Thermal hysteresis | 0.36mV/V - limits residual offset after thermal cycling, improving repeatability in field-deployed test equipment. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
|
Use Scenario: High-resolution 18-bit sigma-delta ADC in environmental sensor node measuring temperature and humidity. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for ADC's internal conversion core, directly setting LSB size and full-scale range. Use Value: ±0.5% initial accuracy and 50ppm/°C drift ensure <±0.01% total error contribution over operating temperature, preserving measurement integrity without recalibration. |
Use Scenario: Real-time monitoring of 3.3V and 5V rails in industrial PLC backplane. IC Role / Device Role / Timing Role: Serves as precision threshold reference for comparator-based overvoltage/undervoltage detection circuitry. Use Value: 20μVRMS noise prevents false triggering on ripple-rich DC rails; 60μA min current allows direct bias from rail via high-value resistor. |
| Portable Instrumentation | Battery-Powered Equipment |
|
Use Scenario: Handheld multimeter with auto-ranging analog front-end and dual-slope integrator. IC Role / Device Role / Timing Role: Supplies reference voltage for integrator ramp generator and zero-reference calibration path. Use Value: Low 60μA operating current extends alkaline battery life beyond 200 hours; SC-70 package fits compact PCB layouts. |
Use Scenario: Wireless gas detector using electrochemical sensor and low-power MCU. IC Role / Device Role / Timing Role: References sensor signal conditioning amplifier and ADC, enabling ppm-level gas concentration resolution. Use Value: Stable 1.225V output over –40°C to 85°C ensures consistent sensitivity across outdoor deployment temperatures without software compensation. |
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, 3.3μA quiescent current, SOT-23-3 | Lower accuracy grade but lower supply current; not rated for >85°C ambient | Select for ultra-low-power (<10μA) battery applications where 1.2V suffices and industrial temp range is unnecessary. |
| LM4040CIM3-ADJ | Adjustable 1.235V–10V output, ±0.5% accuracy, 100ppm/°C, 60μA min current, SOT-23-3 | Wider output range but higher tempco; no SC-70 option; requires external resistors for fixed output | Choose when design flexibility demands programmable reference voltage and SOT-23-3 is preferred over SC-70. |
Compared with REF3012AIDBZR and LM4040CIM3-ADJ, TL4051CIDCKR offers identical 0.5% accuracy and 50ppm/°C drift but uniquely combines SC-70 packaging, 1.225V exact output, and guaranteed stability without output capacitance-making it optimal for miniaturized, noise-sensitive industrial sensing platforms.
Availability
TL4051CIDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and portable instrumentation requiring stable component supply, long-term calibration retention, and industrial-temperature reliability.
Supply support for TL4051CIDCKR 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-reliability manufacturing.
The TL4051 series was developed to deliver micropower shunt references for space-constrained, battery-operated, and high-accuracy measurement systems-emphasizing low noise, wide current range, and capacitor-free stability.
FAQ
What is the output voltage tolerance and temperature coefficient of TL4051CIDCKR?
The TL4051CIDCKR has a fixed 1.225V output with ±0.5% maximum initial tolerance at 25°C and a maximum average temperature coefficient of 50ppm/°C over –40°C to +85°C. These values are specified for the C-grade device and confirmed in Section 5.4 of the TI datasheet SLOS487A.
Does TL4051CIDCKR require an external output capacitor for stability?
No, TL4051CIDCKR does not require an external output capacitor. It is designed to remain stable with all capacitive loads, including zero capacitance, as explicitly stated in the Features section and Section 7.1 of the datasheet. This eliminates BOM cost and layout complexity.
What is the minimum cathode current needed for TL4051CIDCKR to regulate properly?
The TL4051CIDCKR requires a minimum cathode current of 60μA (typical) and 65μA (max over temperature) to maintain regulation. This value is documented in Table 5.4 (TL4051C12I Electrical Characteristics) and enables ultra-low-power operation in battery-backed systems.
Which package type and pin count does TL4051CIDCKR use?
TL4051CIDCKR uses the SC-70 (DCK) package with 5 physical terminals. Only Pins 1 (Cathode) and 2 (Anode) are functional; Pin 3 is NC and must be left floating or tied to Anode, while Pins 4–5 are thermal pads with no electrical connection.
Can TL4051CIDCKR be used in automotive applications?
TL4051CIDCKR is rated for –40°C to +85°C operation and is not AEC-Q200 qualified. While it may function in some automotive cabin environments, TI does not specify or guarantee performance for under-hood or safety-critical automotive use. For such applications, consider the Q-grade variants like TL4051C12QDCKR.
TL4051CIDCKR 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:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TL4051CIDCKR FAQ
1.How can I place an order for TL4051CIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051CIDCKR 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 TL4051CIDCKR reliable?
The price and inventory of TL4051CIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051CIDCKR is usually 5 days.
3.What payment methods are accepted for TL4051CIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051CIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051CIDCKR?
TL4051CIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051CIDCKR 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 TL4051CIDCKR?
For technical support, including TL4051CIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051CIDCKR requirements.
6.How does Aetrix verify that TL4051CIDCKR is sourced from the original manufacturer or authorized distributors?
All TL4051CIDCKR 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 TL4051CIDCKR meets industry standards.
7.What is the process for return or replacement of TL4051CIDCKR?
All TL4051CIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051CIDCKR, 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 TL4051CIDCKR part is unused and in its original packaging.
Return procedure for TL4051CIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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