Texas Instruments TL4050A41QDCKT

Overview

TL4050A41QDCKT from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 4.096V output with ±0.1% initial tolerance and ±50ppm/°C temperature coefficient across –40°C to 125°C. It operates from 68μA minimum cathode current up to 15mA, exhibits 93μVRMS wideband noise, and maintains low dynamic impedance (0.5Ω) - enabling high-accuracy ADC/DAC biasing in battery-powered data-acquisition systems.

For engineers reviewing the TL4050A41QDCKT datasheet, TL4050A41QDCKT pinout, TL4050A41QDCKT application, or TL4050A41QDCKT equivalent, this page delivers verified specifications, SOT-23-3 terminal mapping, automotive-grade thermal performance, and validated alternatives for precision analog design under extended temperature constraints.

Technical Context

The TL4050A41QDCKT functions as a two-terminal shunt reference requiring no external capacitor for stability and supporting all capacitive loads. Its internal bandgap architecture achieves tight initial accuracy and low thermal drift via curvature-compensated design, with thermal hysteresis limited to 1.148mV over –40°C to 125°C cycling.

It operates in a wide cathode current range (68μA to 15mA), delivering consistent 4.096V output with <10mV total variation across current and temperature extremes. Dynamic impedance remains ≤0.5Ω at 1mA/120Hz, ensuring minimal load-induced voltage shift in precision sensor front-ends and energy-monitoring circuits.

Key Specifications

Pinout & Package

TL4050A41QDCKT uses the SC-70 (DCK) 3-pin surface-mount package, measuring 2.0mm × 1.25mm × 0.9mm. Pin 1 is Anode, Pin 2 is Cathode, and Pin 3 is NC (no internal connection); per TI documentation, Pin 3 must remain floating or tied to Pin 2 due to parasitic Schottky diode.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050A41QDCKT, REF3040AIDBZR trades 0.1% accuracy for lower cost and broader volume availability, while MAX6008AEUR+T improves temperature stability but sacrifices automotive temperature range - making TL4050A41QDCKT the sole option meeting both ±0.1% and –40°C to 125°C requirements in one device.

Availability

TL4050A41QDCKT is available at Aetrix Electronics and suitable for automotive electronics, precision data-acquisition systems, and industrial energy management applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TL4050A41QDCKT 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 decades of expertise in precision reference design and automotive-qualified components.

The TL4050 series was developed specifically for high-accuracy, low-power shunt reference needs in harsh-environment applications - emphasizing thermal stability, micropower operation, and robustness across industrial and automotive temperature ranges.

FAQ

What is the operating temperature range of TL4050A41QDCKT?

The TL4050A41QDCKT is characterized for operation from –40°C to 125°C ambient temperature. This extended range qualifies it for under-hood automotive applications and industrial control environments where thermal stress exceeds standard industrial limits. Its electrical parameters - including output voltage, temperature coefficient, and dynamic impedance - are guaranteed across this full span.

Does TL4050A41QDCKT require an output capacitor?

No, TL4050A41QDCKT does not require an output capacitor for stability. It is designed to remain stable with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks. Adding capacitance may reduce noise but is never necessary for loop stability - simplifying layout and reducing component count in compact designs.

How is TL4050A41QDCKT used in a shunt regulator configuration?

In a shunt regulator setup, TL4050A41QDCKT connects between system ground (Anode, Pin 1) and a regulated node (Cathode, Pin 2). A series resistor (RS) sets total current from the unregulated supply to meet both load current (IL) and minimum cathode current (68μA). RS is calculated using RS = (VS − 4.096V) / (IL + IZ), ensuring IZ stays within 68μA–15mA.

What is the significance of the 'Q' suffix in TL4050A41QDCKT?

The 'Q' suffix in TL4050A41QDCKT denotes qualification for the extended temperature range of –40°C to 125°C, distinct from the 'I' grade (–40°C to 85°C). This designation reflects full characterization and testing across the wider thermal envelope, including parameter validation for output voltage, tempco, and long-term stability - critical for automotive and industrial deployments.

Can TL4050A41QDCKT replace TL4050A41IDCKT in existing designs?

TL4050A41QDCKT can replace TL4050A41IDCKT in designs requiring operation above 85°C ambient, as both share identical electrical specs, pinout, and SC-70 package. However, the Q-grade version undergoes additional thermal screening and is rated for higher junction temperatures. No PCB changes are needed, but thermal validation above 85°C is recommended to confirm system-level reliability.