My Inquiry
My Account
Texas Instruments TL4051BQDCKT
- Part No.:
- TL4051BQDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051BQDCKT.pdf
- Description:
- IC VREF SHUNT ADJ 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,747
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL4051BQDCKT 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 operation across –40°C to 125°C. It delivers stable reference voltage in low-current, space-constrained applications such as battery-powered instrumentation and automotive sensor signal conditioning.
For engineers reviewing the TL4051BQDCKT datasheet, TL4051BQDCKT pinout, TL4051BQDCKT application, or TL4051BQDCKT equivalent, key selection criteria include guaranteed 60μA minimum cathode current, stability with all capacitive loads, SC-70 package compatibility, and extended-temperature qualification for harsh-environment designs.
Technical Context
The TL4051BQDCKT operates as a two-terminal shunt reference, regulating voltage by sinking adjustable cathode current while maintaining a precise 1.225V reverse breakdown voltage. Its internal bandgap core achieves tight initial tolerance and low thermal drift via curvature-compensated design.
It requires no external output capacitor and remains stable under all capacitive load conditions due to inherent low dynamic impedance (0.5Ω typical at 1mA) and high phase margin. The device supports both fixed-output and adjustable configurations-though TL4051BQDCKT is the fixed 1.225V variant in SC-70 packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V ±0.2% at 100μA, enabling direct replacement of legacy 1.2V references with tighter tolerance. |
| Temp Coefficient | Max 50ppm/°C over –40°C to 125°C, ensuring ≤±0.625mV drift across full operating range. |
| Min Cathode Current | 60μA typical, allowing ultra-low-power biasing in energy-harvesting or coin-cell systems. |
| Output Noise | 20μVRMS (10Hz–10kHz), critical for high-resolution ADC reference and precision audio circuits. |
| Dynamic Impedance | 0.5Ω at 1mA/120Hz, minimizing load-induced voltage variation in varying-current applications. |
| Operating Temp | –40°C to +125°C, qualified for under-hood automotive, industrial control, and downhole equipment. |
| ESD Rating | ±2000V HBM, supporting robust handling in automated assembly without special ESD precautions. |
Pinout & Package
TL4051BQDCKT is packaged in the SC-70 (DCK) 5-pin outline, though only three terminals are electrically active: Cathode, Anode, and NC (no-connect). Pin 1 is Cathode, Pin 2 is Anode, and Pins 3–5 are unused and must remain unconnected per TI specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Current-sink output terminal | Connects to regulated node; sinks all reference and load current; voltage referenced to Anode. |
| Anode (Pin 2) | Reference ground/reference return | Common return path; must be tied to system ground or lowest potential point in shunt configuration. |
| Pins 3–5 | No-connect (NC) | Internally unconnected; must be left floating-no PCB trace or solder mask required. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Eliminates need for output bypass capacitor-reduces BOM count and board area in compact designs. |
| Wide cathode current range | Operates from 60μA to 12mA, supporting both micropower sensing and higher-current analog front-ends. |
| Low thermal hysteresis | 0.36mV/V after –40°C ↔ 125°C cycling, preserving calibration integrity in thermally cycled systems. |
| Extended temperature grade | Qualified to 125°C ambient, enabling use in engine control units, power inverters, and industrial motor drives. |
| Low long-term drift | 120ppm shift after 1000 hours at 25°C, reducing recalibration frequency in metrology-grade instruments. |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and air quality over weeks on single coin cell. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225V for 16-bit SAR ADC and low-noise op-amp signal chain. Use Value: 60μA min cathode current enables >10-year battery life; 20μVRMS noise ensures <0.01% measurement error. | Use Scenario: Occupant detection and HVAC control sensors mounted near vehicle dashboard with wide ambient swings. IC Role / Device Role / Timing Role: Precision reference for bridge amplifier and microcontroller ADC in seat occupancy and cabin air quality modules. Use Value: 50ppm/°C tempco and –40°C to 125°C rating maintain ±0.5mV accuracy across full automotive thermal profile. |
| Industrial Process Transmitters | Energy Meter Reference Subsystem |
Use Scenario: 4–20mA loop-powered pressure/flow transmitters deployed in chemical plants with ambient extremes. IC Role / Device Role / Timing Role: Two-terminal shunt reference establishing excitation voltage for RTD/bridge sensors and ADC reference. Use Value: Stable operation down to 60μA allows full functionality even at lowest loop current; no output cap simplifies conformal coating. | Use Scenario: Class 0.2 smart electricity meters requiring metrology-grade voltage reference for polyphase energy calculation. IC Role / Device Role / Timing Role: Primary shunt reference for isolation amplifier input stage and sigma-delta ADC reference buffer. Use Value: 0.2% initial tolerance and 120ppm long-term drift meet IEC 62053-22 accuracy requirements without trimming. |
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, SOT-23-3, –40°C to 125°C | 10mV lower nominal output; same tempco and accuracy but higher 100μA min cathode current | Choose when 1.2V matches existing resistor-divider ratios or legacy layout; verify 100μA bias sufficiency. |
| ADR3412ARJZ-R7 | Fixed 1.2V output, ±0.1% initial accuracy, 30ppm/°C, SOT-23-5, –40°C to 125°C | Tighter tolerance and lower tempco, but requires 150μA min cathode current and has different pinout | Prefer for highest-accuracy metrology where 150μA bias is available; not drop-in due to pin assignment and current demand. |
Compared with REF3012AIDBZR and ADR3412ARJZ-R7, TL4051BQDCKT offers identical temperature range and accuracy grade but uniquely supports 60μA minimum cathode current in SC-70 packaging-enabling smaller footprint and lower power in constrained designs where 1.225V output is acceptable.
Availability
TL4051BQDCKT is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin electronics, and industrial process transmitters requiring stable component supply with extended-temperature qualification and low-power performance.
Supply support for TL4051BQDCKT 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 high-accuracy, low-power shunt reference applications in space-constrained and thermally demanding environments-including automotive, energy metering, and portable test equipment.
FAQ
What is the output voltage tolerance and temperature coefficient of TL4051BQDCKT?
TL4051BQDCKT has a fixed 1.225V output with ±0.2% initial tolerance (B grade) at 25°C and a maximum average temperature coefficient of 50ppm/°C over –40°C to 125°C. This means its output varies no more than ±0.625mV across the full temperature range, making it suitable for applications requiring stable reference under thermal stress.
Does TL4051BQDCKT require an external output capacitor for stability?
No, TL4051BQDCKT does not require an external output capacitor. It is internally compensated and stable with all capacitive loads-from zero to unlimited capacitance-eliminating the need for bypass caps and simplifying layout in noise-sensitive or space-limited designs.
What is the minimum cathode current required for proper operation of TL4051BQDCKT?
TL4051BQDCKT requires a minimum cathode current of 60μA (typical) to maintain regulation. At currents below this threshold, output voltage may deviate beyond specifications. Designers must ensure the external bias resistor supplies ≥60μA under worst-case low-voltage, high-temperature conditions.
Which package type and pin count does TL4051BQDCKT use?
TL4051BQDCKT uses the SC-70 (DCK) package with 5 physical pins, but only Pins 1 (Cathode) and 2 (Anode) are functional. Pins 3–5 are no-connect and must remain unconnected on the PCB per Texas Instruments' datasheet guidance.
Is TL4051BQDCKT qualified for automotive applications?
Yes, TL4051BQDCKT is qualified for extended temperature operation from –40°C to +125°C and carries Q-grade marking, meeting AEC-Q100 stress-test requirements for automotive under-hood and cabin electronics. Its 50ppm/°C tempco and 0.2% initial accuracy support ASIL-B–compatible sensor signal chains.
TL4051BQDCKT 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:
- ±0.2%
- 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
TL4051BQDCKT FAQ
1.How can I place an order for TL4051BQDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051BQDCKT 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 TL4051BQDCKT reliable?
The price and inventory of TL4051BQDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051BQDCKT is usually 5 days.
3.What payment methods are accepted for TL4051BQDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051BQDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051BQDCKT?
TL4051BQDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051BQDCKT 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 TL4051BQDCKT?
For technical support, including TL4051BQDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051BQDCKT requirements.
6.How does Aetrix verify that TL4051BQDCKT is sourced from the original manufacturer or authorized distributors?
All TL4051BQDCKT 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 TL4051BQDCKT meets industry standards.
7.What is the process for return or replacement of TL4051BQDCKT?
All TL4051BQDCKT units undergo pre-shipment inspection (PSI). If there is an issue with TL4051BQDCKT, 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 TL4051BQDCKT part is unused and in its original packaging.
Return procedure for TL4051BQDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051BQDCKT Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
