Texas Instruments TL4050C10IDCKR

Overview

TL4050C10IDCKR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V output with ±0.5% initial tolerance (max), 50ppm/°C temperature coefficient, 150μVRMS wideband noise, 0.7Ω dynamic impedance at 1mA, and stable operation from 80μA to 15mA cathode current - used in high-resolution ADC/DAC biasing and industrial power-supply monitoring.

For engineers reviewing the TL4050C10IDCKR datasheet, TL4050C10IDCKR pinout, TL4050C10IDCKR application, or TL4050C10IDCKR equivalent, key selection criteria include its C-grade accuracy, SC-70 package footprint, no-output-capacitor stability, low quiescent current, and extended industrial temperature range (–40°C to 85°C).

Technical Context

The TL4050C10IDCKR operates as a two-terminal shunt reference, requiring only an external series resistor to regulate voltage across a load. Its internal bandgap core delivers stable 10V reverse breakdown with thermal hysteresis of 2.8mV over –40°C to 125°C cycling.

It maintains regulation across cathode currents from 80μA (min) to 15mA while exhibiting low dynamic impedance (0.7Ω @ 1mA, 120Hz) and minimal voltage drift versus current (≤23mV over 1–15mA). No external capacitor is needed for stability, even with heavy capacitive loads.

Key Specifications

Pinout & Package

TL4050C10IDCKR is housed in a 3-pin SC-70 (DCK) package - ultra-compact surface-mount footprint (2.0 × 2.1 × 0.9 mm) optimized for space-constrained PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050C10IDCKR, TL4050B10IDCKR improves initial accuracy by 0.3% at modest cost increase, while REF3010AIDBZR shifts to series architecture - altering bias network design but offering enable functionality and slightly lower noise.

Availability

TL4050C10IDCKR is available at Aetrix Electronics and suitable for industrial process monitoring, precision data-acquisition systems, and automotive cabin electronics requiring stable component supply with guaranteed long-term sourcing.

Supply support for TL4050C10IDCKR 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, embedded processing, and connectivity technologies, with decades of expertise in precision analog ICs.

The TL4050 series was designed specifically for cost-sensitive, space-constrained applications demanding micropower shunt references with guaranteed stability and low noise - targeting industrial, test equipment, and portable instrumentation markets.

FAQ

What is the minimum cathode current required for TL4050C10IDCKR to maintain regulation?

The TL4050C10IDCKR requires a minimum cathode current of 80μA (typical) and up to 103μA across its full operating temperature range (–40°C to +85°C). Below this threshold, the device exits regulation and output voltage drops nonlinearly. Designers must size the series bias resistor to guarantee ≥103μA under worst-case low-voltage, high-temperature conditions. This value is confirmed in Section 5.10 of the TL4050 datasheet.

Does TL4050C10IDCKR require an output capacitor for stability?

No, TL4050C10IDCKR does not require an output capacitor for stability - it is internally compensated and remains stable with all capacitive loads, including >10μF ceramic or tantalum capacitors placed directly at the cathode. An output capacitor may be added for additional noise filtering, but it introduces no risk of oscillation. This behavior is explicitly verified in Section 8.1 and Figure 6-1 of the official TI datasheet.

What is the thermal hysteresis specification for TL4050C10IDCKR?

The thermal hysteresis of TL4050C10IDCKR is 2.8mV, defined as the difference between the 25°C output voltage measured after thermal cycling from –40°C versus after cycling from 125°C. This parameter reflects mechanical stress memory in the silicon and directly impacts repeatability in systems undergoing repeated temperature excursions. It is specified in Table 5.10 and applies across all C-grade 10V variants.

How does the noise performance of TL4050C10IDCKR compare to lower-voltage variants in the same family?

TL4050C10IDCKR exhibits 150μVRMS wideband noise (10Hz–10kHz), higher than the 41μVRMS of the 2.5V TL4050C25 variant and 93μVRMS of the 4.096V/5V versions. This scaling follows fundamental device physics: higher breakdown voltage references inherently generate more thermal and shot noise. System designers using TL4050C10IDCKR in noise-sensitive applications should consider post-filtering or oversampling to mitigate this effect.

Can TL4050C10IDCKR be used in automotive under-hood applications?

TL4050C10IDCKR is rated for –40°C to +85°C operation (industrial grade), making it suitable for automotive cabin and infotainment systems but not under-hood environments exceeding 85°C. For under-hood use, the Q-grade variant TL4050C10QDCKR is required - qualified to –40°C to +125°C with identical electrical specs. The "I" suffix in TL4050C10IDCKR explicitly denotes industrial temperature range compliance.