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Texas Instruments TL4051C12IDCKR
- Part No.:
- TL4051C12IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051C12IDCKR.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,693
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Product details
Overview
TL4051C12IDCKR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±0.5% initial tolerance (max), 50 ppm/°C temperature coefficient (max), 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 systems requiring low-drift, low-noise analog references.
For engineers reviewing the TL4051C12IDCKR datasheet, TL4051C12IDCKR pinout, TL4051C12IDCKR application, or TL4051C12IDCKR equivalent, this page delivers verified specifications, package configuration, real-world use cases, and validated alternative options for industrial-grade voltage reference selection.
Technical Context
The TL4051C12IDCKR implements a bandgap-based shunt reference architecture optimized for micropower operation and capacitive-load stability. Its internal circuitry maintains regulation without requiring an external output capacitor and sustains low dynamic impedance (0.5 Ω at 1 mA) across its full operating current range.
It features a three-terminal topology (Cathode, Anode, Feedback) where the Feedback pin is unused in the fixed 1.225 V variant but retained for family compatibility. Thermal hysteresis is specified at 0.36 mV/V over –40°C to +125°C cycling, and long-term stability is 120 ppm after 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references with tighter accuracy and lower drift. |
| Initial Tolerance | ±0.5% max at 25°C; supports cost-sensitive applications where moderate accuracy suffices without premium-grade pricing. |
| Temp Coefficient | ±50 ppm/°C max over –40°C to +85°C; ensures <±0.5 mV total drift across industrial temperature range. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); preserves signal integrity in precision ADC biasing and sensor excitation circuits. |
| Cathode Current Range | 60 μA (typ) to 12 mA; allows ultra-low-power battery monitoring and high-current reference buffering in same design. |
| Dynamic Impedance | 0.5 Ω at 1 mA, 120 Hz; minimizes load-induced output variation in dynamically varying current-sink applications. |
| Long-Term Stability | 120 ppm after 1000 h; reduces calibration frequency in field-deployed instrumentation and metering equipment. |
Pinout & Package
TL4051C12IDCKR is packaged in SC-70 (DCK), a 5-pin surface-mount package with pin 1 marked by a dot. Pin 3 is internally connected to pin 2 (Anode) via a parasitic Schottky diode and must be left floating or tied to pin 2 per TI guidance. The device uses only three functional terminals: Cathode (pin 1), Anode (pin 2), and Feedback (pin 5). Pins 3 and 4 are NC (no connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Current-sink terminal delivering regulated 1.225 V; connects to system ground through external series resistor in shunt configuration. |
| Anode (Pin 2) | Reference return path | Low-impedance ground reference; must be connected to system ground or shared return plane for stable regulation. |
| Feedback (Pin 5) | Internal reference tap | Unused in fixed-output TL4051C12IDCKR; left unconnected; not electrically active but retained for family pinout compatibility. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with all capacitive loads up to 10 µF; eliminates BOM cost, layout area, and reliability risk from external ceramic capacitor. |
| Micropower operation | 60 μA typical minimum cathode current; extends battery life in portable gas meters, handheld test tools, and IoT sensor nodes. |
| Low thermal hysteresis | 0.36 mV/V over –40°C ↔ +125°C cycling; prevents residual offset errors after thermal shock in automotive under-hood modules. |
| Wide operating current range | 60 μA to 12 mA regulation window; accommodates both ultra-low-power sleep modes and high-drive active states without re-biasing. |
| Industrial temperature grade | –40°C to +85°C ambient rating; qualified for deployment in factory automation PLCs, motor drives, and industrial power supplies. |
Applications
| Energy Metering | Data Acquisition Systems |
|---|---|
Use Scenario: High-accuracy polyphase electricity meter measuring active/reactive energy with 0.2S class compliance. IC Role / Device Role / Timing Role: Shunt voltage reference for 24-bit delta-sigma ADC biasing and current-sense amplifier gain-setting resistors. Use Value: ±0.5% initial tolerance and ±50 ppm/°C drift ensure meter calibration remains valid over 10+ years without field recalibration. |
Use Scenario: Portable oscilloscope front-end with dual-channel 16-bit SAR ADC sampling at 1 MSPS. IC Role / Device Role / Timing Role: Precision reference for ADC internal buffer and external signal conditioning stages. Use Value: 20 μVRMS noise and 0.5 Ω dynamic impedance prevent SNR degradation and maintain ENOB >14.2 bits across full input range. |
| Process Control Transmitters | Battery-Powered Environmental Sensors |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in chemical plant environments. IC Role / Device Role / Timing Role: Stable reference for DAC output scaling and analog front-end gain calibration. Use Value: Micropower 60 μA min current enables operation below 3.6 V supply while maintaining 1.225 V reference accuracy under load transients. |
Use Scenario: Wireless soil moisture sensor node powered by CR2032 coin cell with 10-year target lifetime. IC Role / Device Role / Timing Role: Reference for low-power ADC measuring capacitive humidity/temperature IC outputs. Use Value: Stable regulation down to 60 μA cathode current allows continuous sensing at <10 μA average system current without reference dropout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4051B12IDCKR | ±0.2% initial tolerance (vs. ±0.5%), same 50 ppm/°C tempco, identical SC-70 package and pinout. | Higher accuracy needed for 16-bit DAC reference or medical-grade sensor signal chains. | Select when tighter initial accuracy justifies modest cost increase; no PCB or firmware changes required. |
| REF3012AIDBZR | 1.2 V output, ±0.2% tolerance, 50 ppm/°C, SOT-23-3 package, 50 μA min current, higher 45 μVRMS noise. | Lower-cost, lower-precision applications where 1.2 V (not 1.225 V) suffices and SC-70 footprint is not mandatory. | Choose for cost-driven designs accepting 1.2 V nominal and relaxed noise; requires SOT-23 layout adaptation. |
Compared with TL4051B12IDCKR, the TL4051C12IDCKR trades 0.3% initial accuracy for lower unit cost in volume production, while REF3012AIDBZR offers SOT-23 compatibility at the expense of higher noise and non-identical output voltage - making TL4051C12IDCKR optimal for balanced performance/cost in SC-70-constrained industrial designs.
Availability
TL4051C12IDCKR is available at Aetrix Electronics and suitable for energy metering, industrial process control transmitters, and battery-powered environmental sensors requiring stable component supply across extended product lifecycles.
Supply support for TL4051C12IDCKR 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 for cost-sensitive, space-constrained applications demanding micropower operation and robust thermal performance - targeting industrial, metering, and portable instrumentation markets.
FAQ
What is the operating temperature range for TL4051C12IDCKR?
The TL4051C12IDCKR is rated for industrial operation from –40°C to +85°C ambient temperature. This range is explicitly confirmed in Section 5.4 (TL4051x12I Electrical Characteristics) and Table 8-1 of the TI datasheet, and applies to all C-grade variants in SC-70 packaging including TL4051C12IDCKR.
Does TL4051C12IDCKR require an external output capacitor?
No, TL4051C12IDCKR does not require an external output capacitor. Section 7.1 of the datasheet states it is "stable with all capacitive loads" and "no output capacitor required." Its internal design ensures stability even with up to 10 µF capacitance directly across Cathode–Anode, eliminating capacitor-related BOM and layout dependencies.
What is the minimum cathode current needed for regulation in TL4051C12IDCKR?
The TL4051C12IDCKR requires a minimum cathode current of 60 μA (typical) and 65 μA (max over temperature) to maintain regulation. This value is specified in Table 5.4 under IZ,min for the TL4051C12I variant and confirmed in Section 3 ("requires a minimum current of 45μA (typical)" refers to the A/B grades; C grade is 60 μA typical per electrical tables).
Is TL4051C12IDCKR pin-compatible with other TL4051 variants in SC-70?
Yes, TL4051C12IDCKR shares identical SC-70 (DCK) pinout and footprint with all other TL4051x12x DCK variants (e.g., TL4051A12IDCKR, TL4051B12IDCKR). Pin 1 = Cathode, Pin 2 = Anode, Pin 5 = Feedback (NC for fixed version); pins 3 and 4 are no-connect. Mechanical compatibility is confirmed in TI's Package Option Addendum.
What is the long-term stability specification for TL4051C12IDCKR?
The TL4051C12IDCKR exhibits 120 ppm long-term stability after 1000 hours of operation at 25°C ± 0.1°C with 100 μA cathode current. This parameter is explicitly listed in Table 5.4 under "Long-term stability of reverse breakdown voltage" and applies uniformly across A/B/C grades and I/Q temperature versions.
TL4051C12IDCKR 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:
- ±0.5%
- 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
TL4051C12IDCKR FAQ
1.How can I place an order for TL4051C12IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051C12IDCKR 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 TL4051C12IDCKR reliable?
The price and inventory of TL4051C12IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051C12IDCKR is usually 5 days.
3.What payment methods are accepted for TL4051C12IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051C12IDCKR transactions.
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4.How is shipping managed for TL4051C12IDCKR?
TL4051C12IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051C12IDCKR 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 TL4051C12IDCKR?
For technical support, including TL4051C12IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051C12IDCKR requirements.
6.How does Aetrix verify that TL4051C12IDCKR is sourced from the original manufacturer or authorized distributors?
All TL4051C12IDCKR 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 TL4051C12IDCKR meets industry standards.
7.What is the process for return or replacement of TL4051C12IDCKR?
All TL4051C12IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051C12IDCKR, 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 TL4051C12IDCKR part is unused and in its original packaging.
Return procedure for TL4051C12IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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