Texas Instruments TL4050A50QDCKR

Overview

TL4050A50QDCKR from Texas Instruments is a precision micropower shunt voltage reference with 5.0V nominal output, ±0.1% initial tolerance (max), 50ppm/°C temperature coefficient (max), 93μVRMS wideband noise, and operation across –40°C to 125°C. It serves as a stable voltage reference in high-accuracy data acquisition, battery-powered instrumentation, and automotive power-supply monitoring circuits.

For engineers reviewing the TL4050A50QDCKR datasheet, TL4050A50QDCKR pinout, TL4050A50QDCKR application, or TL4050A50QDCKR equivalent, key selection criteria include its A-grade accuracy, extended temperature qualification, low-noise performance, SC-70 package footprint, and shunt topology compatibility with high-impedance or capacitive-load systems.

Technical Context

The TL4050A50QDCKR implements a two-terminal shunt topology requiring no external output capacitor and remaining stable with all capacitive loads. Its internal bandgap core delivers tight initial accuracy and low thermal drift via curvature-compensated design.

It operates over cathode current range 56μA to 15mA with dynamic impedance of 0.5Ω at 1mA, enabling precise regulation under varying load and supply conditions while maintaining long-term stability of 120ppm after 1000 hours.

Key Specifications

Pinout & Package

TL4050A50QDCKR is housed in a 3-pin SC-70 (DCK) package - a space-saving 2.0mm × 2.1mm surface-mount outline with 0.65mm pitch - optimized for portable and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3050AIDBZR and ADR3450ARJZ-R7, TL4050A50QDCKR offers the best balance of A-grade accuracy, ultra-low minimum current, and SC-70 footprint - making it optimal for cost-sensitive, space-constrained, and battery-limited applications where 93μVRMS noise remains acceptable.

Availability

TL4050A50QDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, automotive electronics, and portable instrumentation requiring stable component supply with guaranteed long-term sourcing and consistent parametric performance.

Supply support for TL4050A50QDCKR 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

TL4050A50QDCKR belongs to the TL4050 precision shunt reference product line, engineered for high-accuracy, low-power, and extended-temperature applications in portable instrumentation, automotive subsystems, and industrial sensing.

FAQ

What is the operating temperature range for TL4050A50QDCKR?

The TL4050A50QDCKR is characterized for operation from –40°C to 125°C ambient temperature, meeting automotive extended-temperature requirements and supporting deployment in under-hood ECUs, industrial motor drives, and outdoor environmental sensors where thermal robustness is essential. This Q-grade rating distinguishes it from industrial-grade variants limited to 85°C maximum.

Does TL4050A50QDCKR require an output capacitor?

No, TL4050A50QDCKR does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads, including direct connection to ADC reference inputs or large bulk capacitance. Adding a capacitor may reduce high-frequency noise but is never necessary for loop stability - simplifying layout and reducing bill-of-materials cost.

What is the minimum cathode current needed for TL4050A50QDCKR to regulate properly?

The TL4050A50QDCKR requires a minimum cathode current of 56μA (typical) at 25°C, rising to 90μA across the full –40°C to 125°C range. Below this threshold, regulation degrades and output voltage deviates from 5.0V. Designers must size the series resistor (RS) to guarantee this minimum current under worst-case low-V_S/high-I_L conditions.

How does TL4050A50QDCKR compare to TL4050A50IDCKR?

TL4050A50QDCKR and TL4050A50IDCKR share identical electrical specifications except for temperature range: TL4050A50QDCKR is qualified from –40°C to 125°C (Q-grade), while TL4050A50IDCKR is rated only to 85°C (I-grade). Both use the same SC-70 package, A-grade accuracy, and 5.0V output - making the Q variant the sole choice for automotive, industrial, and high-reliability applications.

Can TL4050A50QDCKR be used as a replacement for TL4050B50QDCKR?

Yes, TL4050A50QDCKR can replace TL4050B50QDCKR in most designs because both share the same 5.0V output, SC-70 package, Q-grade temperature range, and pinout. The key difference is tighter initial tolerance: TL4050A50QDCKR guarantees ±0.1% vs. ±0.2% for the B-grade part. No layout or schematic changes are required, but system-level accuracy improves without hardware modification.