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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

Texas Instruments TL4050A25QDCKR

Name: TL4050A25QDCKR
Brand: Texas Instruments
SKU: TL4050A25QDCKR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TL4050A25QDCKR

Manufacturer:: Texas Instruments

Category:: Voltage Reference

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: TL4050A25QDCKR.pdf

Description:: IC VREF SHUNT 0.1% SC70-5

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Product details

Overview

TL4050A25QDCKR from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 2.5 V output with ±0.1% initial tolerance and ±50 ppm/°C temperature coefficient across –40°C to 125°C. It operates from 60 μA to 15 mA cathode current, exhibits 41 μV_RMS wideband noise, and requires no output capacitor. It serves as a high-accuracy reference in battery-powered data-acquisition systems and automotive power-supply monitors.

For engineers reviewing the TL4050A25QDCKR datasheet, TL4050A25QDCKR pinout, TL4050A25QDCKR application, or TL4050A25QDCKR equivalent, key selection criteria include extended-temperature operation, low dynamic impedance (0.3 Ω), thermal hysteresis (0.7 mV), long-term stability (120 ppm), and compatibility with all capacitive loads without external compensation.

Technical Context

The TL4050A25QDCKR functions as a two-terminal shunt reference, sinking cathode current to maintain a precise 2.5 V reverse breakdown voltage. Its internal bandgap core achieves tight initial accuracy and low drift via curvature-compensated design, enabling stable regulation under varying load and supply conditions.

It features ultra-low 41 μV_RMS noise (10 Hz–10 kHz) and 0.3 Ω dynamic impedance at 1 mA, supporting high-resolution ADC/DAC biasing. The device is characterized for full-range operation from –40°C to 125°C and remains stable with any capacitive load-no external capacitor required.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.5 V nominal; enables direct interface with 2.5 V ADC references and rail-to-rail input stages.
Initial Tolerance	±0.1% at 25°C; supports 12-bit+ system accuracy without trimming.
Temp Coefficient	±50 ppm/°C over –40°C to 125°C; ensures ≤0.7 mV total drift across full automotive temperature range.
Noise (10 Hz–10 kHz)	41 μV_RMS; contributes <0.02 LSB error in 16-bit, 2.5 V full-scale systems.
Dynamic Impedance	0.3 Ω at 1 mA; minimizes output voltage shift under fast load transients.
Cathode Current Range	60 μA to 15 mA; supports micropower sensor nodes and higher-current analog front-ends.
Thermal Hysteresis	0.7 mV; limits calibration repeatability error after thermal cycling.

Pinout & Package

TL4050A25QDCKR is housed in a SC-70 (DCK) 3-pin package: anode (pin 1), cathode (pin 2), and NC (pin 3). Pin 3 is internally unconnected but must be left floating or tied to pin 2 per TI guidance to avoid parasitic Schottky conduction.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference ground node	Connects to system ground; forms return path for cathode current and defines output voltage reference point.
Cathode (Pin 2)	Output terminal	Sinks regulated current; voltage at this pin is 2.5 V above anode when biased within operating current range.
NC (Pin 3)	No-connect terminal	Internally unconnected; must remain floating or be shorted to pin 2 to prevent unintended conduction via parasitic diode.

Key Features

Feature	Design Value
Extended temperature operation	Rated for –40°C to 125°C ambient; qualified for under-hood automotive and industrial control applications.
No-output-capacitor stability	Stable with any capacitive load; eliminates BOM cost, board space, and reliability risk of external bypass caps.
Low micropower startup	Typical minimum cathode current = 60 μA; enables use in energy-harvesting and coin-cell-powered systems.
Low thermal hysteresis	0.7 mV max; preserves calibration integrity after repeated thermal excursions in test equipment and process controllers.
High ESD robustness	±2000 V HBM rating; withstands handling and assembly without special precautions beyond standard ESD protocols.

Applications

Data-Acquisition Systems	Automotive Power-Supply Monitors
Use Scenario: High-resolution 16-bit SAR ADC in portable environmental sensor node powered by Li-ion battery. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for ADC conversion, directly determining full-scale accuracy and differential nonlinearity. Use Value: ±0.1% tolerance and 41 μV_RMS noise ensure <0.01% total unadjusted error and <0.5 LSB noise floor at 2.5 V FS.	Use Scenario: Real-time monitoring of 12 V battery voltage and 5 V MCU rail in ADAS domain controller. IC Role / Device Role / Timing Role: Serves as precision shunt reference in resistor-divider feedback network for supervisory IC or microcontroller ADC input. Use Value: ±50 ppm/°C tempco and 125°C rating guarantee consistent measurement accuracy across engine bay thermal profiles.
Industrial Process Controllers	Precision Audio Signal Conditioning
Use Scenario: 4–20 mA loop transmitter with HART modulation requiring stable analog front-end biasing. IC Role / Device Role / Timing Role: Supplies reference voltage for DAC-based current output stage and op-amp gain-setting networks. Use Value: 0.3 Ω dynamic impedance prevents output droop during HART frequency bursts; long-term stability (120 ppm/1000 h) reduces recalibration frequency.	Use Scenario: Low-noise microphone preamplifier stage in studio-grade audio interface with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Sets DC bias point and reference level for instrumentation amplifiers and anti-alias filters. Use Value: 41 μV_RMS noise contributes negligible addition to system SNR; no-output-capacitor operation avoids capacitor-induced distortion or aging effects.

Data-Acquisition Systems

Automotive Power-Supply Monitors

Use Scenario: High-resolution 16-bit SAR ADC in portable environmental sensor node powered by Li-ion battery.

IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for ADC conversion, directly determining full-scale accuracy and differential nonlinearity.

Use Value: ±0.1% tolerance and 41 μV_RMS noise ensure <0.01% total unadjusted error and <0.5 LSB noise floor at 2.5 V FS.

Use Scenario: Real-time monitoring of 12 V battery voltage and 5 V MCU rail in ADAS domain controller.

IC Role / Device Role / Timing Role: Serves as precision shunt reference in resistor-divider feedback network for supervisory IC or microcontroller ADC input.

Use Value: ±50 ppm/°C tempco and 125°C rating guarantee consistent measurement accuracy across engine bay thermal profiles.

Industrial Process Controllers

Precision Audio Signal Conditioning

Use Scenario: 4–20 mA loop transmitter with HART modulation requiring stable analog front-end biasing.

IC Role / Device Role / Timing Role: Supplies reference voltage for DAC-based current output stage and op-amp gain-setting networks.

Use Value: 0.3 Ω dynamic impedance prevents output droop during HART frequency bursts; long-term stability (120 ppm/1000 h) reduces recalibration frequency.

Use Scenario: Low-noise microphone preamplifier stage in studio-grade audio interface with 24-bit delta-sigma ADC.

IC Role / Device Role / Timing Role: Sets DC bias point and reference level for instrumentation amplifiers and anti-alias filters.

Use Value: 41 μV_RMS noise contributes negligible addition to system SNR; no-output-capacitor operation avoids capacitor-induced distortion or aging effects.

Equivalent & Alternatives

The following parts are listed as comparable options for similar shunt voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
REF3025AIDBZR	2.5 V, ±0.2% initial tolerance, 50 ppm/°C, SOT-23-3, 50 μA min I_Z	Lower grade accuracy; rated only to 85°C ambient	Select when industrial-temp operation suffices and ±0.2% tolerance meets system budget.
ADR3425ARJZ-R7	2.5 V, ±0.1% initial tolerance, 30 ppm/°C, SOT-23-5, 100 μA min I_Z, 12 μV_RMS noise	Lower noise and tempco, but higher minimum current and 5-pin package	Select when ultra-low noise (<15 μV_RMS) and tighter tempco are critical, and layout allows SOT-23-5.

Compared with REF3025AIDBZR, TL4050A25QDCKR offers extended temperature range and tighter initial tolerance; compared with ADR3425ARJZ-R7, it delivers lower minimum operating current and simpler 3-pin interface at the expense of higher noise and wider tempco.

Availability

TL4050A25QDCKR is available at Aetrix Electronics and suitable for automotive electronics, industrial process controls, and battery-powered data-acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL4050A25QDCKR 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, power management, and signal chain solutions.

The TL4050 series belongs to TI's precision voltage reference product line, engineered for high-accuracy, low-power, and extended-temperature applications in automotive, industrial, and portable instrumentation systems.

FAQ

What is the operating temperature range of TL4050A25QDCKR?

The TL4050A25QDCKR is specified for operation from –40°C to +125°C ambient temperature. This extended temperature range is validated per its Q-grade qualification and makes TL4050A25QDCKR suitable for under-hood automotive applications, industrial motor drives, and outdoor process instrumentation where thermal extremes are encountered.

Does TL4050A25QDCKR require an external output capacitor?

No, TL4050A25QDCKR does not require an external output capacitor for stability. Its architecture is designed to remain stable with any capacitive load-including PCB trace capacitance and downstream ADC input capacitance-eliminating the need for external bypass components and simplifying layout in space-constrained designs.

What is the minimum cathode current needed for TL4050A25QDCKR to regulate properly?

The TL4050A25QDCKR requires a minimum cathode current of 60 μA (typical) at 25°C, rising to 65 μA across the full –40°C to 125°C range. Maintaining I_Z ≥65 μA ensures the device remains in regulation and meets its specified tolerance and tempco performance throughout its operating temperature envelope.

How does TL4050A25QDCKR compare to TL4050A25IDCKR?

TL4050A25QDCKR and TL4050A25IDCKR share identical electrical specifications except for temperature rating: TL4050A25QDCKR is qualified for –40°C to 125°C, while TL4050A25IDCKR is limited to –40°C to 85°C. Both use the same SC-70 package, 2.5 V output, ±0.1% tolerance, and 41 μV_RMS noise-making TL4050A25QDCKR the direct upgrade for extended-temperature deployments.

What is the thermal hysteresis specification for TL4050A25QDCKR?

The thermal hysteresis of TL4050A25QDCKR is 0.7 mV, defined as the difference between its 25°C output voltage measured after cycling to –40°C versus after cycling to 125°C. This low hysteresis value ensures repeatable calibration and minimal measurement drift in equipment subjected to repeated thermal stress, such as automated test systems and field-deployed sensors.

TL4050A25QDCKR 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):: 2.5V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±0.1%

Temperature Coefficient:: 50ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 41µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 65 µA

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-5

TL4050A25QDCKR FAQ

1.How can I place an order for TL4050A25QDCKR through Aetrix?

Please submit a Request for Quotation (RFQ) for TL4050A25QDCKR 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 TL4050A25QDCKR reliable?

The price and inventory of TL4050A25QDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A25QDCKR is usually 5 days.

3.What payment methods are accepted for TL4050A25QDCKR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050A25QDCKR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TL4050A25QDCKR?

TL4050A25QDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TL4050A25QDCKR 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 TL4050A25QDCKR?

For technical support, including TL4050A25QDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A25QDCKR requirements.

6.How does Aetrix verify that TL4050A25QDCKR is sourced from the original manufacturer or authorized distributors?

All TL4050A25QDCKR 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 TL4050A25QDCKR meets industry standards.

7.What is the process for return or replacement of TL4050A25QDCKR?

All TL4050A25QDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A25QDCKR, 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 TL4050A25QDCKR part is unused and in its original packaging.

Return procedure for TL4050A25QDCKR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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