Texas Instruments TL4050B41IDCKR

Overview

TL4050B41IDCKR from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 4.096V output with ±0.2% initial tolerance (max), 50ppm/°C temperature coefficient (max), 93μVRMS wideband noise, and operation from –40°C to 85°C. It requires only 52μA minimum cathode current and supports up to 15mA, enabling use in high-resolution 12-bit data-acquisition systems where LSB = 1mV with 5V supplies.

For engineers reviewing the TL4050B41IDCKR datasheet, TL4050B41IDCKR pinout, TL4050B41IDCKR application, or TL4050B41IDCKR equivalent, key selection criteria include output accuracy over temperature, low-noise performance for ADC/DAC biasing, micropower operation for battery-powered instrumentation, and SC-70 package compatibility with space-constrained PCB layouts.

Technical Context

The TL4050B41IDCKR operates as a two-terminal shunt reference, sinking cathode current to maintain a precise reverse breakdown voltage across its terminals. Its internal bandgap-derived core achieves tight initial tolerance and low thermal drift without external components.

It exhibits low dynamic impedance (0.5Ω at 1mA, 120Hz), stable performance with any capacitive load (no output capacitor required), and robust ESD protection (±2000V HBM). The device is characterized across the industrial temperature range (–40°C to 85°C) and specified for long-term stability (120ppm after 1000 hours).

Key Specifications

Pinout & Package

TL4050B41IDCKR is housed in a 3-pin SC-70 (DCK) package - a 2.0mm × 2.1mm surface-mount outline with 0.65mm pitch - optimized for high-density PCBs and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050A41IDCKR, the TL4050B41IDCKR trades 0.1% initial accuracy for lower cost while retaining identical noise, tempco, and package; versus REF3040AIDBZR, it offers true shunt operation with no minimum load requirement and zero external components, simplifying design at the expense of supply-side isolation.

Availability

TL4050B41IDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered instrumentation requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for TL4050B41IDCKR 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 broad industrial portfolio coverage.

The TL4050 series belongs to TI's precision voltage reference product line, engineered specifically for high-accuracy, low-power shunt regulation in space- and energy-constrained applications such as portable instrumentation and industrial sensing.

FAQ

What is the output voltage tolerance of TL4050B41IDCKR at 25°C?

The TL4050B41IDCKR has a maximum initial output voltage tolerance of ±0.2% at 25°C, corresponding to ±8.2mV around the nominal 4.096V output. This specification is verified per TI's electrical characteristics table for the B-grade industrial-temperature variant and applies under 100μA cathode current test conditions.

Does TL4050B41IDCKR require an output capacitor for stability?

No, TL4050B41IDCKR does not require an output capacitor for stability. Its design is inherently stable with all capacitive loads, including direct connection to ADC reference inputs or large ceramic bypass caps. An external capacitor may be added for additional noise filtering but is never necessary for loop stability.

What is the minimum cathode current needed for TL4050B41IDCKR to regulate properly?

The TL4050B41IDCKR requires a minimum cathode current of 52μA (typical) at 25°C to maintain regulation. Over the full industrial temperature range (–40°C to 85°C), the guaranteed minimum is 73μA. Operation below this current results in loss of specified output voltage accuracy and increased temperature sensitivity.

How does TL4050B41IDCKR compare to TL4050A41IDCKR in terms of accuracy?

TL4050B41IDCKR provides ±0.2% initial tolerance versus ±0.1% for TL4050A41IDCKR - a 0.1% absolute difference in worst-case deviation. Both share identical 4.096V output, 50ppm/°C tempco, 93μVRMS noise, SC-70 packaging, and operating temperature range, making them drop-in replacements where the tighter A-grade tolerance is not required.

Can TL4050B41IDCKR be used in automotive under-hood applications?

TL4050B41IDCKR is rated for –40°C to +85°C operation (industrial grade), which covers most automotive cabin and infotainment applications but not under-hood environments requiring 125°C operation. For extended temperature use, the Q-grade variant TL4050B41QDCKR is specified from –40°C to +125°C and shares identical electrical performance.