Texas Instruments TL4050A10IDCKR

Overview

TL4050A10IDCKR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V output with ±0.1% initial tolerance (A grade), 50ppm/°C max temperature coefficient, 150μVRMS wideband noise, 0.7Ω dynamic impedance at 1mA, and operation across –40°C to 85°C. It serves as a stable reference in high-resolution ADCs, battery-powered instrumentation, and industrial power-supply monitors where low quiescent current and load-capacitance immunity are critical.

For engineers reviewing the TL4050A10IDCKR datasheet, TL4050A10IDCKR pinout, TL4050A10IDCKR application, or TL4050A10IDCKR equivalent, this page delivers verified specifications, SOT-23-3 pin mapping, real-world use cases in data acquisition and energy management, and two validated alternative parts with technical and application-level distinctions.

Technical Context

The TL4050A10IDCKR 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 initial accuracy and low thermal drift via curvature-compensated design, enabling stable 10V regulation over cathode currents from 100μA to 15mA.

It features low dynamic impedance (0.7Ω at 1mA, 120Hz) and low wideband noise (150μVRMS, 10Hz–10kHz), making it suitable for 12-bit+ data converters and precision analog front-ends where reference stability directly impacts system ENOB and long-term calibration integrity.

Key Specifications

Pinout & Package

TL4050A10IDCKR is housed in a SC-70 (DCK) 3-pin package - identical footprint and pinout to SOT-23-3 - with pin 1 (Anode), pin 2 (Cathode), and pin 3 (NC/Not Connected). Pin 3 must remain floating or tied to pin 2 per TI's parasitic diode constraint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050A10IDCKR, REF3010AIDBZR trades 0.1% initial accuracy for 4× lower noise and 2× lower IQ, while LM4040C10IDCKR sacrifices 5× higher initial error and 2× higher tempco to reduce BOM cost-making each viable only in distinct accuracy-power-cost trade-off zones.

Availability

TL4050A10IDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, portable instrumentation, and energy management units requiring stable component supply, long-lifecycle support, and guaranteed traceability for industrial OEM programs.

Supply support for TL4050A10IDCKR 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 reference design and high-volume manufacturing.

The TL4050 series was developed for cost-sensitive, space-constrained applications demanding micropower operation, zero-output-capacitor stability, and A-grade accuracy-targeting portable test equipment, industrial sensors, and battery-powered data loggers.

FAQ

What is the minimum cathode current required for stable operation of TL4050A10IDCKR?

The TL4050A10IDCKR requires a minimum cathode current of 100μA (typical) and up to 103μA across its full –40°C to 85°C operating range. This low current enables ultra-low-power designs such as battery-operated multimeters and wireless sensor nodes where standby current must remain below 150μA. Operating below this threshold risks output voltage deviation and instability.

Does TL4050A10IDCKR require an output capacitor for stability?

No, TL4050A10IDCKR does not require an output capacitor for stability-it is explicitly designed to remain stable with all capacitive loads, including direct connection to ADC input capacitors or long PCB traces. Adding a capacitor may reduce high-frequency noise but is never necessary for loop stability, simplifying layout and reducing BOM count.

What is the thermal hysteresis specification for TL4050A10IDCKR?

The TL4050A10IDCKR exhibits 2.8mV thermal hysteresis-the difference between its 25°C output voltage after cycling to –40°C versus after cycling to 125°C. This low hysteresis ensures repeatable calibration in field-deployed instruments that undergo repeated thermal cycling, such as environmental monitoring stations or automotive diagnostic tools.

How does the dynamic impedance of TL4050A10IDCKR affect ADC performance?

With a dynamic impedance of 0.7Ω at 1mA and 120Hz, TL4050A10IDCKR introduces <700μV output shift under 1mA transient load changes. In 12-bit ADC applications (LSB = 2.44mV at 10V), this ensures reference-induced error remains below 0.3 LSB-even during fast sampling or multiplexed channel switching-preserving effective resolution.

Can TL4050A10IDCKR be used in automotive under-hood applications?

TL4050A10IDCKR is rated for –40°C to +85°C (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 TL4050A10QDCKR (–40°C to 125°C) is required-TL4050A10IDCKR must not be substituted without thermal derating validation.