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Texas Instruments TL4051BIDCKR
- Part No.:
- TL4051BIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051BIDCKR.pdf
- Description:
- IC VREF SHUNT ADJ 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,371
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Product details
Overview
TL4051BIDCKR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.2% initial accuracy (B 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 TL4051BIDCKR datasheet, TL4051BIDCKR pinout, TL4051BIDCKR application, or TL4051BIDCKR equivalent, key selection criteria include its SC-70-5 package footprint, absence of required output capacitor, compatibility with all capacitive loads, and suitability for battery-powered instrumentation requiring long-term stability and low thermal hysteresis (0.36mV/V).
Technical Context
The TL4051BIDCKR implements a bandgap-based shunt reference architecture optimized for micropower operation, delivering stable 1.225V output without external components. Its low dynamic impedance (0.5Ω at 1mA) and tight tolerance ensure consistent regulation under varying load and supply conditions.
Designed for industrial ambient temperatures (–40°C to 85°C), it maintains performance across full operating current range (60μA–12mA) with no minimum output capacitance requirement-enabling direct integration into space-constrained, low-noise analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V - provides precise, factory-trimmed reference for ADC/DAC biasing and sensor excitation. |
| Initial Accuracy | ±0.2% max at 25°C - ensures system-level calibration accuracy without post-manufacture trimming. |
| Temp Coefficient | 50ppm/°C max - limits output drift to ≤62.5μV/°C over –40°C to 85°C, critical for unheated industrial environments. |
| Output Noise | 20μVRMS (10Hz–10kHz) - supports high-resolution (≥18-bit) data acquisition without added filtering. |
| Cathode Current Range | 60μA to 12mA - enables operation from ultra-low-power sleep modes up to active regulation in power supplies. |
| Thermal Hysteresis | 0.36mV/V - guarantees repeatable voltage after thermal cycling, essential for metrology-grade equipment. |
| Dynamic Impedance | 0.5Ω at 1mA - minimizes load-induced output variation in precision current-sense feedback loops. |
Pinout & Package
TL4051BIDCKR is packaged in SC-70-5 (DCK), a 5-pin surface-mount package with 0.65mm pitch and 2.0mm × 1.25mm footprint. Pin 1 is Cathode, Pin 2 is Anode, Pin 3 is NC (no internal connection), Pin 4 is Feedback (FB), and Pin 5 is Anode (tied internally to Pin 2). The NC pin must remain unconnected per TI design guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Source/sink point for cathode current; connects to resistor divider or load in shunt regulator topology. |
| Anode (Pin 2) | Ground reference terminal | Common return path for reference current; electrically tied to Pin 5 in DCK package. |
| NC (Pin 3) | No internal connection | Must be left floating; not bonded internally-connection risks parasitic leakage or EMI coupling. |
| Feedback (Pin 4) | Reference input for adjustable mode | Used only in adjustable variants; unused in TL4051BIDCKR (fixed 1.225V version) but remains accessible. |
| Anode (Pin 5) | Redundant anode terminal | Internally connected to Pin 2; provides second solder point for improved thermal and mechanical reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output bypass capacitor-reduces BOM count and PCB area in portable designs. |
| Low 20μVRMS noise | Enables direct use in 18-bit+ SAR ADC references without external low-noise LDO or RC filtering. |
| 60μA minimum cathode current | Supports operation in energy-harvesting systems and coin-cell-powered sensors with sub-100μA quiescent budgets. |
| 0.36mV/V thermal hysteresis | Ensures <±10ppm repeatability after environmental cycling-critical for field-deployed test equipment calibration. |
| SC-70-5 package | 2.0mm × 1.25mm footprint saves >40% board space vs. SOT-23-3 while maintaining thermal performance (θJA = 252°C/W). |
Applications
| Data Acquisition Systems | Industrial Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution 24-bit delta-sigma ADC front-end in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for ADC internal gain stage and external sensor signal conditioning. Use Value: Enables ±0.005% full-scale measurement accuracy over –40°C to 70°C ambient, meeting IEC 61000-6-2 immunity requirements. |
Use Scenario: Secondary-side voltage monitoring in isolated 48V telecom DC-DC converters with remote sense capability. IC Role / Device Role / Timing Role: Shunt reference in optocoupler feedback loop to regulate output within ±0.5% over line/load/transient conditions. Use Value: Maintains regulation accuracy despite 100nF–10μF output capacitance variations and 100kHz switching noise. |
| Precision Audio Converters | Battery-Powered Portable Meters |
Use Scenario: Reference source for 192kHz/24-bit audio DAC in professional field recorder with dual Li-ion battery supply. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift bias for DAC's internal voltage-to-current conversion stage. Use Value: Limits THD+N degradation to <–110dB across battery discharge (3.0V–4.2V), preserving dynamic range. |
Use Scenario: Calibration reference in handheld multimeter with auto-ranging ohmmeter and thermocouple inputs. IC Role / Device Role / Timing Role: Primary voltage standard for self-calibration routines executed during power-up and periodic maintenance. Use Value: Achieves 0.01% resistance measurement accuracy over 10-year field life with <120ppm long-term stability. |
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% accuracy, 50ppm/°C, SC-70-3 package (3 pins), higher 50μVRMS noise. | Lacks FB pin and NC pin; incompatible with circuits requiring SC-70-5 layout or feedback path access. | Select when board space is constrained to 3-pin footprint and 1.2V (not 1.225V) suffices for ADC VREF scaling. |
| ADR3412ARJZ-R7 | Fixed 1.2V output, ±0.1% accuracy, 30ppm/°C, 12μVRMS noise, SOT-23-5 package, higher 100μA min current. | Requires 100nF output capacitor for stability; not stable with arbitrary capacitive loads. | Choose for ultra-low-noise (<15μVRMS) applications where capacitor addition is acceptable and tighter initial tolerance justifies cost premium. |
Compared with REF3012AIDBZR and ADR3412ARJZ-R7, TL4051BIDCKR offers unique 1.225V output, SC-70-5 pinout with dedicated FB/NC terminals, and capacitor-free stability-making it optimal for legacy-compatible designs needing exact voltage matching and layout flexibility.
Availability
TL4051BIDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, industrial power-supply monitors, and battery-powered portable meters requiring stable component supply across extended production lifecycles.
Supply support for TL4051BIDCKR 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 over 50 years of innovation in precision analog ICs.
The TL4051 series was designed specifically for micropower, high-accuracy shunt reference applications in space-constrained industrial, test, and portable instrumentation-emphasizing low noise, zero-output-capacitor operation, and robust thermal performance.
FAQ
What is the output voltage tolerance of TL4051BIDCKR over temperature?
The TL4051BIDCKR has a maximum initial accuracy of ±0.2% at 25°C and a temperature coefficient of 50ppm/°C. Over the full –40°C to 85°C operating range, its total output variation remains within ±0.35% (including initial error and worst-case drift), verified per TI's TL4051B12I electrical characteristics table.
Does TL4051BIDCKR require an output capacitor for stability?
No, TL4051BIDCKR does not require an output capacitor. It is explicitly designed to be stable with all capacitive loads-from 0pF to >10μF-eliminating the need for external bypass components and simplifying layout in noise-sensitive applications.
What is the minimum cathode current needed for TL4051BIDCKR to regulate properly?
The TL4051BIDCKR requires a minimum cathode current of 60μA (typical) to maintain regulation. At 25°C, its specified IZ,min is 39μA, but the full-range guaranteed minimum is 65μA-ensuring reliable startup and regulation across –40°C to 85°C.
How does the SC-70-5 package of TL4051BIDCKR differ from SOT-23 versions?
TL4051BIDCKR uses SC-70-5 (DCK), which adds a dedicated Feedback (Pin 4) and redundant Anode (Pin 5) versus SOT-23-3. This enables future design reuse with adjustable variants and improves thermal dissipation (θJA = 252°C/W vs. 206°C/W for DBZ), though Pin 3 is NC and must remain unconnected.
Can TL4051BIDCKR be used in automotive applications?
TL4051BIDCKR is rated for –40°C to 85°C industrial operation and is not AEC-Q200 qualified. For automotive applications requiring extended temperature range (–40°C to 125°C), TI recommends TL4051B12QDCKR-the Q-grade variant with identical SC-70-5 packaging and performance specs.
TL4051BIDCKR 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:
- ±0.2%
- 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
TL4051BIDCKR FAQ
1.How can I place an order for TL4051BIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051BIDCKR 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 TL4051BIDCKR reliable?
The price and inventory of TL4051BIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051BIDCKR is usually 5 days.
3.What payment methods are accepted for TL4051BIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051BIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051BIDCKR?
TL4051BIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051BIDCKR 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 TL4051BIDCKR?
For technical support, including TL4051BIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051BIDCKR requirements.
6.How does Aetrix verify that TL4051BIDCKR is sourced from the original manufacturer or authorized distributors?
All TL4051BIDCKR 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 TL4051BIDCKR meets industry standards.
7.What is the process for return or replacement of TL4051BIDCKR?
All TL4051BIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051BIDCKR, 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 TL4051BIDCKR part is unused and in its original packaging.
Return procedure for TL4051BIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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