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Texas Instruments TL4051AQDCKT
- Part No.:
- TL4051AQDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4051AQDCKT.pdf
- Description:
- IC VREF SHUNT ADJ 0.1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,820
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Product details
Overview
TL4051AQDCKT from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.1% initial accuracy (A grade), 50ppm/°C temperature coefficient, 20μVRMS wideband noise, and operation across –40°C to 125°C. It delivers stable reference voltage in low-current, high-accuracy analog signal chains for battery-powered instrumentation and automotive power-supply monitors.
For engineers reviewing the TL4051AQDCKT datasheet, TL4051AQDCKT pinout, TL4051AQDCKT application, or TL4051AQDCKT equivalent, key selection criteria include its guaranteed 60μA minimum cathode current, stability with all capacitive loads (no output capacitor required), and SC-70 package compatibility with space-constrained PCB layouts.
Technical Context
The TL4051AQDCKT implements a bandgap-based shunt reference architecture with internal feedback control, enabling precise regulation without external components. Its design supports operation from 60μA to 12mA cathode current while maintaining ≤50ppm/°C drift over –40°C to 125°C and ≤0.1% initial tolerance at 25°C.
It features ultra-low dynamic impedance (0.5Ω at 1mA, 120Hz), thermal hysteresis of 0.36mV/V, and long-term stability of 120ppm after 1000 hours - all verified under extended temperature conditions per Q-grade qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V reverse breakdown voltage at 100μA cathode current |
| Initial Accuracy | ±0.1% max at 25°C - enables high-resolution ADC/DAC biasing without calibration |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C - ensures <±0.62mV drift across full operating range |
| Noise (10Hz–10kHz) | 20μVRMS typical - minimizes contribution to system noise floor in precision measurement |
| Min Cathode Current | 60μA typical (65μA max over temperature) - supports ultra-low-power sensor nodes |
| Dynamic Impedance | 0.5Ω at 1mA, 120Hz - maintains regulation during fast load transients |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
TL4051AQDCKT is housed in a 5-pin SC-70 (DCK) package with exposed pad for thermal performance. Pin 1 is Cathode, Pin 2 is Anode, Pin 3 is NC (must be left open or tied to Anode per EMI guidance), Pin 4 is Feedback (FB), and Pin 5 is VREF. The device uses a shunt topology requiring external series resistor for current setting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Connects to regulated voltage rail; sinks total cathode current (IZ) |
| Anode (Pin 2) | Ground reference | Return path for cathode current; must be low-impedance to maintain accuracy |
| NC (Pin 3) | No-connect terminal | Must remain unconnected or tied to Anode - parasitic Schottky diode exists between Pins 2–3 |
| Feedback (Pin 4) | Adjustable reference input | Used only in adjustable versions; unused in TL4051AQDCKT (fixed 1.225V variant) |
| VREF (Pin 5) | Internal reference tap | Not user-accessible; internal connection to bandgap core - no external connection required |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.225V output | Eliminates external resistor divider, reducing BOM count and layout sensitivity in compact designs |
| No output capacitor required | Stable with all capacitive loads - simplifies filtering in noise-sensitive data-acquisition front-ends |
| 60μA min cathode current | Enables operation from microamp-level supplies - ideal for energy-harvesting and battery-backed systems |
| SC-70-5 package | 0.65mm pitch, 2.0 × 1.25mm footprint - fits high-density routing in portable medical and test equipment |
| Q-grade temperature range | –40°C to +125°C qualification - meets AEC-Q100 stress requirements for automotive power management ICs |
Applications
| Portable Data Loggers | Automotive Battery Monitors |
|---|---|
|
Use Scenario: Continuous voltage logging in remote environmental sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for 16-bit SAR ADC sampling supply rails and internal bandgap calibration. Use Value: 60μA minimum operating current extends battery life beyond 5 years; ±0.1% accuracy ensures <±0.5mV absolute error in cell-voltage reporting. |
Use Scenario: Real-time monitoring of 12V lead-acid and 48V Li-ion battery packs in ADAS ECUs. IC Role / Device Role / Timing Role: Serves as precision reference for current-sense amplifier gain-setting and voltage-divider scaling in high-side sensing circuits. Use Value: ±50ppm/°C tempco guarantees <±1.2mV drift over engine bay temperature swings; Q-grade rating ensures reliability at 125°C ambient. |
| Industrial Process Transmitters | Precision Audio DAC Biasing |
|
Use Scenario: 4–20mA loop-powered field transmitters measuring pressure, flow, or temperature. IC Role / Device Role / Timing Role: Supplies reference voltage to voltage-to-current converter op-amps and microcontroller ADC inputs. Use Value: 20μVRMS low-noise performance prevents quantization errors in 24-bit sigma-delta converters; stable regulation supports HART communication overlay. |
Use Scenario: High-fidelity audio DAC modules in studio-grade headphone amplifiers and digital mixers. IC Role / Device Role / Timing Role: Generates ultra-stable bias for DAC internal reference buffers and analog output stage DC offset nulling. Use Value: 0.5Ω dynamic impedance suppresses supply-induced distortion; fixed 1.225V eliminates trim-pot drift affecting channel balance and THD+N. |
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 package | Lower accuracy grade; lacks Q-temp qualification (only –40°C to 85°C) | Acceptable for cost-sensitive industrial controls where 1.2V suffices and extended temp not required |
| MAX6008AEUR+T | Fixed 1.25V output, ±0.1% accuracy, 30ppm/°C, SC-70-5, but 100μA min cathode current | Higher minimum current limits use in sub-100μA systems; no Q-grade option available | Preferred when lower tempco is critical and supply can support >100μA bias current |
Compared with TL4051AQDCKT, REF3012AIDBZR trades accuracy and temperature range for lower cost and smaller footprint, while MAX6008AEUR+T offers tighter tempco at the expense of higher quiescent current - making TL4051AQDCKT optimal for Q-grade, low-IZ, fixed-1.225V applications.
Availability
TL4051AQDCKT is available at Aetrix Electronics and suitable for automotive battery monitors, portable data loggers, industrial process transmitters, and precision audio DAC biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL4051AQDCKT 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog ICs and automotive-qualified components.
The TL4051 series was designed specifically for high-accuracy, low-power shunt reference applications in harsh environments - emphasizing micropower operation, extended temperature resilience, and robustness against capacitive loading and EMI.
FAQ
What is the output voltage tolerance of TL4051AQDCKT over its full operating temperature range?
The TL4051AQDCKT has a maximum reverse breakdown voltage tolerance of ±7.4mV over –40°C to 125°C, corresponding to ±0.6% of nominal 1.225V output. This is derived from the TL4051A12Q specification table, where full-range tolerance is specified as –7.4mV to +7.4mV at IZ = 100μA. The TL4051AQDCKT is the A-grade, Q-temperature version of the fixed 1.225V device.
Does TL4051AQDCKT require an external output capacitor for stability?
No, TL4051AQDCKT does not require an external output capacitor. Its internal design ensures stability with all capacitive loads, including direct connection to large bypass caps or ADC input capacitance. This eliminates risk of oscillation and reduces bill-of-materials in precision analog signal paths.
What is the minimum cathode current needed for TL4051AQDCKT to maintain regulation?
The TL4051AQDCKT requires a minimum cathode current of 65μA across its full operating temperature range (–40°C to 125°C). At 25°C, typical minimum current is 60μA. This value is specified in the TL4051x12Q Electrical Characteristics table under IZ,min for the A-grade device.
Can TL4051AQDCKT be used in place of adjustable TL4051 variants?
No - TL4051AQDCKT is a fixed-output (1.225V) variant and lacks the feedback (FB) pin functionality required for adjustable configurations. Its pinout includes dedicated VREF and NC terminals instead of FB, and internal resistor networks are trimmed for fixed output. Substitution would require circuit redesign.
Is TL4051AQDCKT qualified for automotive applications?
Yes, TL4051AQDCKT is qualified for automotive use: it is a Q-grade device rated for –40°C to +125°C operation, carries TI's automotive qualification documentation, and meets requirements for under-hood power management, battery monitoring, and ADAS subsystems where precision voltage references are critical.
TL4051AQDCKT 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:
- ±0.1%
- 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
TL4051AQDCKT FAQ
1.How can I place an order for TL4051AQDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051AQDCKT 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 TL4051AQDCKT reliable?
The price and inventory of TL4051AQDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051AQDCKT is usually 5 days.
3.What payment methods are accepted for TL4051AQDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051AQDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051AQDCKT?
TL4051AQDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051AQDCKT 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 TL4051AQDCKT?
For technical support, including TL4051AQDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051AQDCKT requirements.
6.How does Aetrix verify that TL4051AQDCKT is sourced from the original manufacturer or authorized distributors?
All TL4051AQDCKT 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 TL4051AQDCKT meets industry standards.
7.What is the process for return or replacement of TL4051AQDCKT?
All TL4051AQDCKT units undergo pre-shipment inspection (PSI). If there is an issue with TL4051AQDCKT, 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 TL4051AQDCKT part is unused and in its original packaging.
Return procedure for TL4051AQDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051AQDCKT Tags
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