Texas Instruments TL4050B50IDCKR

Overview

TL4050B50IDCKR from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 5.0 V output with ±0.2% initial tolerance (max), 50 ppm/°C temperature coefficient (max), 93 μV_RMS wideband noise, and operation from 60 μA to 15 mA cathode current. It serves as a high-accuracy voltage基准 in portable data-acquisition systems requiring low quiescent current and minimal board space.

For engineers reviewing the TL4050B50IDCKR datasheet, TL4050B50IDCKR pinout, TL4050B50IDCKR application, or TL4050B50IDCKR equivalent, key selection criteria include its SC-70 package footprint, industrial-grade (–40°C to 85°C) temperature rating, absence of required output capacitor, and compatibility with ADC/DAC reference inputs in battery-powered instrumentation.

Technical Context

The TL4050B50IDCKR operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 5.0 V reverse breakdown voltage across its terminals. Its internal bandgap core achieves stability via low dynamic impedance (0.5 Ω at 1 mA, 120 Hz) and thermal hysteresis of only 1.4 mV over –40°C to 125°C cycling.

It functions without external compensation, remains stable with any capacitive load, and supports design flexibility through three accuracy grades (A/B/C) and two temperature ranges (I/Q). The B-grade variant balances cost and performance for non-safety-critical industrial measurement applications.

Key Specifications

Pinout & Package

TL4050B50IDCKR is housed in a 3-pin SC-70 (DCK) package - a 2.0 mm × 2.1 mm surface-mount outline with gull-wing leads, optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3050AIDBZR and LM4040B50IDCKR, TL4050B50IDCKR offers the lowest thermal drift and lowest minimum operating current in the SC-70 footprint - making it optimal for battery longevity and high-accuracy portable instrumentation where layout space is constrained.

Availability

TL4050B50IDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and portable instrumentation requiring stable component supply, long-term parametric consistency, and RoHS-compliant packaging.

Supply support for TL4050B50IDCKR 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.

TL4050B50IDCKR belongs to the TL4050 precision shunt reference product line, engineered for high-accuracy, low-power, and capacitor-free operation in portable and industrial measurement systems.

FAQ

What is the output voltage and tolerance of TL4050B50IDCKR?

TL4050B50IDCKR provides a nominal 5.0 V output voltage with a maximum initial tolerance of ±0.2% at 25°C. Over the full industrial temperature range (–40°C to +85°C), its total error-including initial tolerance, temperature drift (≤50 ppm/°C), and thermal hysteresis (1.4 mV)-remains within ±0.35% of 5.0 V, making TL4050B50IDCKR suitable for 12-bit measurement systems.

Does TL4050B50IDCKR require an output capacitor?

No, TL4050B50IDCKR does not require an output capacitor for stability. It is explicitly designed to remain stable with any capacitive load, including direct connection to ADC reference inputs or large bulk capacitance. Adding a capacitor may reduce high-frequency noise but is never mandatory - simplifying layout and reducing BOM count for TL4050B50IDCKR implementations.

What is the minimum cathode current needed for TL4050B50IDCKR to regulate properly?

The minimum cathode current for TL4050B50IDCKR is 60 μA typical (up to 80 μA over temperature), as specified in the TL4050x50I Electrical Characteristics table. Below this threshold, regulation degrades and output voltage drops. This ultra-low requirement enables TL4050B50IDCKR to operate in energy-harvesting and multi-year battery applications where average current must stay below 100 μA.

How does TL4050B50IDCKR compare to TL4050A50IDCKR in terms of accuracy?

TL4050B50IDCKR has a maximum initial tolerance of ±0.2%, while TL4050A50IDCKR offers ±0.1%. Both share identical temperature coefficient (50 ppm/°C max), noise (93 μV_RMS), and dynamic impedance (0.5 Ω). TL4050B50IDCKR trades 0.1% absolute accuracy for lower cost - making TL4050B50IDCKR ideal for applications where ±0.2% meets system-level error budgets, such as industrial process monitors or mid-tier test equipment.

What package type and pin configuration does TL4050B50IDCKR use?

TL4050B50IDCKR uses the SC-70 (DCK) 3-pin package: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = No Connect (NC). TI specifies that Pin 3 must remain floating to prevent unintended conduction through an internal parasitic diode. This SC-70 footprint measures 2.0 mm × 2.1 mm - 30% smaller than SOT-23 - enabling high-density layouts where TL4050B50IDCKR replaces larger references.