Texas Instruments TL4050C50IDCKT

Overview

TL4050C50IDCKT from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 5.0 V output with ±0.5% initial tolerance (max), 50 ppm/°C temperature coefficient (max), 93 μV_RMS wideband noise, 56–80 μA minimum cathode current, and stable operation across –40°C to 85°C. It serves as a compact, capacitor-free reference in high-resolution ADC/DAC biasing and portable power-supply monitoring circuits.

For engineers reviewing the TL4050C50IDCKT datasheet, TL4050C50IDCKT pinout, TL4050C50IDCKT application, or TL4050C50IDCKT equivalent, this page delivers verified specifications, SC-70 package details, functional pin roles, real-world use cases in data acquisition and battery-powered systems, and two validated alternative parts with documented technical and application differences.

Technical Context

The TL4050C50IDCKT operates as a two-terminal shunt reference requiring only an external series resistor to regulate cathode current between 56 μA (min) and 15 mA (max). Its internal bandgap core achieves low dynamic impedance (0.5 Ω at 1 mA) and thermal hysteresis of 1.4 mV over –40°C to 125°C cycling.

Designed for direct integration into space-constrained analog signal chains, it maintains stable output under all capacitive loads without requiring an output capacitor - enabling robust performance in noisy environments such as automotive sensor interfaces and industrial process controllers.

Key Specifications

Pinout & Package

TL4050C50IDCKT is housed in a 3-pin SC-70 (DCK) package - footprint-compatible with SOT-23 but 30% smaller - optimized for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050B50IDCKT, the TL4050C50IDCKT trades 0.3% initial accuracy for lower cost in volume production, while REF3050AIDBZR offers series architecture compatibility at the expense of requiring a dedicated ground-referenced input and different biasing constraints.

Availability

TL4050C50IDCKT is available at Aetrix Electronics and suitable for data-acquisition systems, battery-powered instrumentation, and industrial power-supply monitors requiring stable component supply with guaranteed long-term continuity.

Supply support for TL4050C50IDCKT 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 over 50 years of innovation in precision analog ICs.

The TL4050 series belongs to TI's precision voltage reference product line, engineered specifically for cost-sensitive, space-constrained applications demanding micropower operation, low noise, and robust thermal performance without external compensation.

FAQ

What is the operating temperature range for TL4050C50IDCKT?

The TL4050C50IDCKT is rated for industrial temperature operation from –40°C to +85°C. This range is confirmed in Section 5.8 of the official datasheet (SLOS486B), which specifies electrical characteristics across that full ambient range. The "I" suffix in the part number explicitly denotes the industrial-grade temperature qualification.

Does TL4050C50IDCKT require an output capacitor?

No, TL4050C50IDCKT does not require an output capacitor for stability. As stated in Section 8.1 of the datasheet, it is designed to remain stable with all capacitive loads - including up to 10 µF - eliminating the need for external bypass capacitance and simplifying layout in space-constrained designs.

What is the minimum cathode current needed for TL4050C50IDCKT to regulate properly?

The TL4050C50IDCKT requires a minimum cathode current of 56 μA (typical) at 25°C, rising to 80 μA maximum across the full –40°C to +85°C range. This value is specified in Table 5.8 (TL4050x50I Electrical Characteristics) and defines the lowest current at which the device maintains regulation within its tolerance band.

How is pin 3 used on TL4050C50IDCKT?

Pin 3 of TL4050C50IDCKT is a no-connect (NC) terminal. Per Section 8.2 of the datasheet, the SC-70 package contains a parasitic Schottky diode between pins 2 and 3; therefore, pin 3 must be left floating or tied directly to pin 2 (cathode) to prevent unintended conduction paths and ensure reliable reference performance.

Can TL4050C50IDCKT replace TL4050A50IDCKT in an existing design?

TL4050C50IDCKT can physically replace TL4050A50IDCKT (same SC-70 package and pinout), but introduces ±0.5% initial tolerance versus ±0.1%. System-level validation is required to confirm whether the looser tolerance impacts accuracy-critical functions like ADC full-scale calibration or sensor linearization - especially in uncalibrated end products.