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Texas Instruments TL4051BQDCKR
- Part No.:
- TL4051BQDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051BQDCKR.pdf
- Description:
- IC VREF SHUNT ADJ 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:14,736
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Product details
Overview
TL4051BQDCKR 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 125°C and is used in high-accuracy data-acquisition systems and battery-powered instrumentation.
For engineers reviewing the TL4051BQDCKR datasheet, TL4051BQDCKR pinout, TL4051BQDCKR application, or TL4051BQDCKR equivalent, key selection factors include its SC-70 package footprint, extended temperature rating, low-noise performance at microamp bias currents, and compatibility with all capacitive loads without external stabilization.
Technical Context
The TL4051BQDCKR implements a bandgap-based shunt reference architecture optimized for micropower operation. Its internal circuitry delivers stable 1.225V output with minimal dynamic impedance (0.5Ω at 1mA) and maintains tight regulation over cathode current (60μA–12mA) and temperature (–40°C to 125°C).
It features a dedicated feedback terminal (FB) enabling adjustable configurations, though TL4051BQDCKR is the fixed-output variant. The device exhibits low thermal hysteresis (0.36mV/V) and long-term stability (120ppm after 1000h), supporting metrology-grade applications where drift must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V - provides stable reference for ADCs, DACs, and sensor signal chains without external resistor network. |
| Initial Accuracy | ±0.2% max (B grade) - ensures ≤2.45mV absolute error at 25°C, critical for 12-bit+ measurement systems. |
| Temp Coefficient | 50ppm/°C max - contributes ≤62.5μV/°C drift over full –40°C to 125°C range, enabling high-stability designs. |
| Output Noise | 20μVRMS (10Hz–10kHz) - low enough to avoid degrading SNR in precision audio and instrumentation front-ends. |
| Cathode Current Range | 60μA to 12mA - supports ultra-low-power sensor nodes (e.g., 60μA enables >10-year coin-cell life) and higher-current regulators. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive, industrial control, and energy metering environments. |
| Dynamic Impedance | 0.5Ω at 1mA - minimizes load-induced output variation, improving regulation in dynamically varying current sinks. |
Pinout & Package
TL4051BQDCKR is packaged in SC-70 (DCK), a 5-pin surface-mount package with 0.65mm pitch. Pin 1 is Cathode, Pin 2 is Anode, Pin 3 is NC (no internal connection), Pin 4 is FB (Feedback), and Pin 5 is NC. Per TI documentation, Pin 3 must be left open or connected to Anode in high-EMI environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Source of regulated 1.225V; connects to external current-setting resistor and load return path. |
| Anode (Pin 2) | Ground reference | Low-impedance return for cathode current; must be tied to system ground with minimal trace inductance. |
| NC (Pin 3) | No internal connection | Must remain unconnected or tied to Anode per EMI mitigation guidance; not usable as signal or power pin. |
| FB (Pin 4) | Internal reference tap | Enables adjustable configuration via external divider; unused in fixed-output TL4051BQDCKR but electrically present. |
| NC (Pin 5) | No internal connection | Unused pad; no electrical function-leave floating or connect to ground only if required by PCB layout rules. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output capacitor-reduces BOM count and board space in space-constrained portable designs. |
| Low 20μVRMS noise | Preserves signal integrity in high-resolution analog front-ends, avoiding post-processing filtering overhead. |
| 60μA minimum cathode current | Enables operation from microamp-level bias sources, ideal for wake-up circuits and ultra-low-power IoT sensors. |
| 50ppm/°C tempco (max) | Ensures predictable, bounded drift across automotive and industrial temperature ranges without calibration. |
| SC-70 package (DCK) | 0.65mm pitch, 2.0 × 1.25mm footprint-supports high-density layouts while maintaining manufacturability on standard SMT lines. |
Applications
| Data-Acquisition Systems | Automotive Electronics |
|---|---|
Use Scenario: High-resolution 16-bit ADC in portable multimeter with battery operation. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for ADC conversion, directly determining absolute measurement accuracy. Use Value: ±0.2% initial tolerance and 50ppm/°C drift ensure <±0.02% total error over temperature, meeting Class I metering requirements. |
Use Scenario: Battery monitoring unit in 12V vehicle electrical system with under-hood placement. IC Role / Device Role / Timing Role: Supplies reference voltage for fuel gauge IC and voltage supervisor during cold cranking and hot idle conditions. Use Value: Operation from –40°C to 125°C and 60μA min current enable reliable startup and sensing even at extreme ambient temperatures. |
| Energy Management/Metering | Battery-Powered Equipment |
Use Scenario: Revenue-grade electricity meter requiring long-term calibration stability. IC Role / Device Role / Timing Role: Reference source for isolated current/voltage sensing ADCs in polyphase metering SoCs. Use Value: 120ppm long-term stability (1000h) and 0.36mV/V thermal hysteresis minimize recalibration frequency and field drift. |
Use Scenario: Wireless environmental sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Low-power voltage reference for op-amp signal conditioning and SAR ADC sampling. Use Value: 60μA operating current extends battery life beyond 5 years in periodic wake-up mode, validated across full temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4051BIDCKR | Same SC-70 package and 1.225V output, but rated for –40°C to 85°C industrial range (not extended temp). | Not suitable for under-hood automotive or high-temp industrial enclosures exceeding 85°C ambient. | Select TL4051BQDCKR when operation above 85°C is required; otherwise TL4051BIDCKR offers cost parity for commercial-grade use. |
| REF3012AIDBZR | Fixed 1.2V output, ±0.2% accuracy, 50ppm/°C, but SOT-23-3 package and 50μA min current-lower noise (12μVRMS) but no FB pin. | Lacks adjustable capability and has different pinout; SC-70 vs SOT-23 footprint requires PCB redesign. | Choose REF3012AIDBZR only if 1.2V (not 1.225V) suffices and lower noise is prioritized over temperature range and FB flexibility. |
Compared with TL4051BIDCKR and REF3012AIDBZR, TL4051BQDCKR uniquely combines extended temperature operation (–40°C to 125°C), fixed 1.225V output matching legacy systems, SC-70 packaging, and FB pin availability-making it optimal for next-generation automotive and industrial references where thermal robustness and design continuity matter.
Availability
TL4051BQDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, automotive electronics, and energy management/metering applications requiring stable component supply, extended temperature qualification, and low-noise precision referencing.
Supply support for TL4051BQDCKR 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 was designed specifically for micropower, high-accuracy shunt reference applications in portable, automotive, and industrial systems where size, stability, and low quiescent current are critical.
FAQ
What is the output voltage tolerance of TL4051BQDCKR at 25°C?
The TL4051BQDCKR has a maximum initial output voltage tolerance of ±0.2% at 25°C, corresponding to ±2.45mV around the nominal 1.225V output. This specification is guaranteed across production lots and verified per TI's electrical test conditions in the datasheet.
Does TL4051BQDCKR require an external output capacitor?
No, TL4051BQDCKR does not require an external output capacitor. It is internally compensated and stable with all capacitive loads-including zero capacitance-eliminating the need for bypass components and simplifying layout in space-constrained designs.
What is the minimum cathode current needed for TL4051BQDCKR to regulate properly?
The TL4051BQDCKR requires a minimum cathode current of 60μA (typical) to maintain regulation. At 25°C, the datasheet specifies 39μA minimum, rising to 65μA across the full –40°C to 125°C operating range-designers must ensure this current is met under worst-case conditions.
How does the temperature coefficient of TL4051BQDCKR affect long-term accuracy?
The TL4051BQDCKR has a maximum average temperature coefficient of 50ppm/°C. Over a 165°C span (–40°C to 125°C), this contributes up to ±8.25mV drift relative to 1.225V-less than 0.67% of full scale-making it suitable for applications demanding consistent accuracy across wide thermal excursions.
Is TL4051BQDCKR pin-compatible with other TL4051 variants in SC-70 packages?
Yes, TL4051BQDCKR shares identical SC-70 (DCK) pinout and footprint with all other TL4051xQDCKR variants (e.g., TL4051AQDCKR, TL4051CQDCKR). Pin assignments-Cathode (1), Anode (2), NC (3), FB (4), NC (5)-are consistent across grades and output types in this package.
TL4051BQDCKR 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:
- 70 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TL4051BQDCKR FAQ
1.How can I place an order for TL4051BQDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051BQDCKR 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 TL4051BQDCKR reliable?
The price and inventory of TL4051BQDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051BQDCKR is usually 5 days.
3.What payment methods are accepted for TL4051BQDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051BQDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051BQDCKR?
TL4051BQDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051BQDCKR 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 TL4051BQDCKR?
For technical support, including TL4051BQDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051BQDCKR requirements.
6.How does Aetrix verify that TL4051BQDCKR is sourced from the original manufacturer or authorized distributors?
All TL4051BQDCKR 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 TL4051BQDCKR meets industry standards.
7.What is the process for return or replacement of TL4051BQDCKR?
All TL4051BQDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051BQDCKR, 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 TL4051BQDCKR part is unused and in its original packaging.
Return procedure for TL4051BQDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051BQDCKR Tags
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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