Texas Instruments TL4050C25IDCKR

Overview

TL4050C25IDCKR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 2.5 V output with ±13 mV (±0.5%) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, 41 μVRMS typical wideband noise, 60 μA typical minimum cathode current, and stable operation across –40°C to 85°C ambient temperature - used in high-resolution ADC biasing and portable power-supply monitoring.

For engineers reviewing the TL4050C25IDCKR datasheet, TL4050C25IDCKR pinout, TL4050C25IDCKR application, or TL4050C25IDCKR equivalent, key selection criteria include shunt reference operating current range (60 μA to 15 mA), low-noise performance for 12-bit+ data acquisition, SC-70 package thermal resistance (252°C/W), and compatibility with capacitive loads without external stabilization.

Technical Context

The TL4050C25IDCKR functions as a two-terminal shunt reference, sinking cathode current to maintain a precise 2.5 V reverse breakdown voltage across its terminals. Its internal bandgap core achieves stability via low dynamic impedance (0.3 Ω at 1 mA) and tight thermal hysteresis (0.7 mV over –40°C to 125°C cycling).

It operates without an output capacitor and remains stable under all capacitive load conditions. The device's wide cathode current range (60 μA to 15 mA) enables use in both ultra-low-power sensor nodes and higher-current analog front-ends, while its 50 ppm/°C tempco ensures accuracy across industrial temperature spans.

Key Specifications

Pinout & Package

TL4050C25IDCKR is housed in a 3-pin SC-70 (DCK) package - a 2.0 mm × 1.25 mm surface-mount outline with 0.65 mm pitch - optimized for space-constrained PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050C25IDCKR, REF3025AIDBZR offers better initial accuracy but demands an output capacitor and uses SOT-23-3, while LM4040C25IDCKR matches the SC-70 footprint and tolerance grade but introduces twice the thermal drift - making TL4050C25IDCKR optimal for stable, capacitor-free, low-drift 2.5 V referencing.

Availability

TL4050C25IDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply with guaranteed long-term sourcing and consistent parametric performance.

Supply support for TL4050C25IDCKR 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 digital signal technologies, with decades of leadership in precision analog ICs and reference solutions.

The TL4050 series belongs to TI's precision shunt voltage reference product line, engineered for high-accuracy, low-power, capacitor-free operation in portable instrumentation, industrial sensing, and energy-efficient data conversion systems.

FAQ

What is the maximum cathode current rating for TL4050C25IDCKR?

The absolute maximum cathode current for TL4050C25IDCKR is 15 mA, as specified in the Absolute Maximum Ratings table. Operating continuously above this level risks exceeding the device's thermal limits and may cause permanent damage. For reliable long-term operation, design cathode current within the recommended 60 μA to 15 mA range, with derating advised above 85°C ambient.

Does TL4050C25IDCKR require an external output capacitor?

No, TL4050C25IDCKR does not require an external output capacitor and is explicitly designed to remain stable with all capacitive loads - including zero capacitance. This eliminates BOM cost and board space associated with bypass capacitors. While adding one is permissible per TI's application notes, it provides no stability benefit and may slightly degrade noise performance if poorly selected.

What is the thermal hysteresis specification for TL4050C25IDCKR?

The thermal hysteresis of TL4050C25IDCKR is 0.7 mV, defined as the difference between the 25°C output voltage measured after cycling to –40°C versus after cycling to 125°C. This value is consistent across all grades (A/B/C) and voltage options, and reflects the device's ability to retain output repeatability after thermal stress - critical for calibration-critical instrumentation using TL4050C25IDCKR.

Can TL4050C25IDCKR be used in automotive applications?

TL4050C25IDCKR is rated for –40°C to +85°C operation and is not qualified to AEC-Q200 or automotive temperature grades (–40°C to +125°C). For automotive use, TI recommends the Q-grade variant TL4050C25QDCKR, which is characterized across –40°C to +125°C and carries appropriate qualification documentation. Using TL4050C25IDCKR in under-hood environments risks parametric shift beyond specification.

What is the top-side marking for TL4050C25IDCKR?

The top-side marking for TL4050C25IDCKR is "84_", where the underscore denotes a site-specific character not included in the base marking. This marking appears on the SC-70 package and aligns with TI's standard ordering information table. It enables visual identification on assembled PCBs and supports traceability during inspection and rework.