Texas Instruments TL4050B10IDCKR

Overview

TL4050B10IDCKR from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 10V output with ±0.2% initial tolerance (max), 50ppm/°C temperature coefficient (max), 150μVRMS wideband noise, and operation across –40°C to 85°C. It functions as a two-terminal programmable cathode-anode reference in analog signal chains, ADC/DAC biasing, and power-supply monitoring circuits.

For engineers reviewing the TL4050B10IDCKR datasheet, TL4050B10IDCKR pinout, TL4050B10IDCKR application, or TL4050B10IDCKR equivalent, this page delivers verified specifications, SC-70 package details, real-world use cases in data acquisition and battery-powered instrumentation, and validated alternative options for design flexibility.

Technical Context

The TL4050B10IDCKR operates as a two-terminal shunt reference requiring no external output capacitor and remaining stable with all capacitive loads. Its internal bandgap core achieves tight regulation via low dynamic impedance (0.7Ω at 1mA) and low thermal hysteresis (2.8mV over –40°C to 125°C cycling).

It draws cathode current from 100μA (typical minimum) up to 15mA, supporting load regulation across wide supply and load variations. The device maintains specified accuracy under industrial temperature conditions (–40°C to 85°C) without derating or external compensation.

Key Specifications

Pinout & Package

TL4050B10IDCKR is housed in a 3-pin SC-70 (DCK) package with 0.65mm pitch, footprint-compatible with SOT-23 but smaller (2.0 × 1.25 × 0.9mm). Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = NC (no internal connection; must be left floating or tied to Pin 2 per TI guidance to avoid parasitic Schottky conduction).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050B10IDCKR, REF3010AIDBZR offers lower quiescent current but higher noise, while LM4040B10IDCKR trades tighter tempco for lower cost and reduced noise - selection depends on whether thermal stability, micropower, or noise dominates the system's error budget.

Availability

TL4050B10IDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and portable test equipment requiring stable component supply with guaranteed long-term sourcing and traceable manufacturing.

Supply support for TL4050B10IDCKR 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 belongs to TI's precision voltage reference product line, engineered for high-accuracy, low-drift, micropower operation in industrial, test, and portable instrumentation applications.

FAQ

What is the operating temperature range for TL4050B10IDCKR?

The TL4050B10IDCKR is rated for industrial temperature operation from –40°C to +85°C. This range is explicitly defined in its ordering information and electrical characteristics tables (Section 5.10), and it does not include extended-temperature (Q-grade) qualification. For applications requiring –40°C to 125°C, the TL4050B10QDCKR variant must be selected instead.

Does TL4050B10IDCKR require an output capacitor?

No, TL4050B10IDCKR does not require an output capacitor for stability. As confirmed in Section 8.1 of the datasheet, it is designed to remain stable with all capacitive loads - including zero capacitance - eliminating the need for external bypass components and simplifying layout in space-constrained designs.

What is the minimum cathode current needed for TL4050B10IDCKR to regulate properly?

The TL4050B10IDCKR requires a minimum cathode current of 100μA (typical) to maintain regulation, as specified in Section 5.10 under IZ,min. At 25°C, the typical value is 100μA, with a maximum of 103μA across the full –40°C to +85°C range - critical for sizing the series resistor (RS) in shunt regulator configurations.

How does TL4050B10IDCKR compare to TL4050A10IDCKR in accuracy?

TL4050B10IDCKR has a maximum initial tolerance of ±0.2% at 25°C, whereas TL4050A10IDCKR offers tighter ±0.1% tolerance. Both share identical 50ppm/°C max temperature coefficient and 10V nominal output. The B-grade provides optimal cost-performance balance for 12-bit systems where A-grade precision is unnecessary.

What package type is used by TL4050B10IDCKR?

TL4050B10IDCKR uses the SC-70 (DCK) package - a 3-pin surface-mount outline measuring 2.0 × 1.25 × 0.9mm with 0.65mm lead pitch. Its top-side marking is "92_", as documented in TI's Ordering Information table (Section 9.1), and it is footprint-compatible with but smaller than SOT-23-3.