Texas Instruments TL4050C25IDCKT

Overview

TL4050C25IDCKT 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 temperature coefficient, 41 μVRMS wideband noise, and stable operation from 60 μA to 15 mA cathode current. It serves as a low-drift, low-noise reference in high-resolution ADCs, portable power monitors, and battery-powered instrumentation.

For engineers reviewing the TL4050C25IDCKT datasheet, TL4050C25IDCKT pinout, TL4050C25IDCKT application, or TL4050C25IDCKT equivalent, key selection criteria include its C-grade accuracy, SC-70 package footprint, no-output-capacitor stability, thermal hysteresis of 0.7 mV, and compatibility with capacitive loads up to 10 µF.

Technical Context

The TL4050C25IDCKT 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 reverse breakdown at 2.5 V with dynamic impedance of 0.3 Ω at 1 mA, enabling tight regulation under varying load and supply conditions.

Designed for industrial temperature range (–40°C to 85°C), it maintains performance across full operating current (60 μA–15 mA) without external compensation. Its low 41 μVRMS noise and ±50 ppm/°C max tempco support 12-bit+ data acquisition where reference drift directly impacts measurement fidelity.

Key Specifications

Pinout & Package

TL4050C25IDCKT is housed in a 3-pin SC-70 (DCK) package - a 2.0 mm × 2.1 mm surface-mount outline with 0.65 mm pitch - optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050B25IDCKT and REF3025AIDBZR, TL4050C25IDCKT offers the lowest cost for applications where ±0.5% tolerance suffices, retains identical SC-70 layout, and delivers the lowest minimum cathode current (60 μA) among the three-critical for energy harvesting or coin-cell use cases.

Availability

TL4050C25IDCKT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and portable instrumentation requiring stable component supply with guaranteed long-term sourcing.

Supply support for TL4050C25IDCKT 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 decades of expertise in precision reference design.

The TL4050 series was developed to deliver cost-effective, micropower shunt references for battery-operated and space-constrained applications where stability, low noise, and capacitor-free operation are essential.

FAQ

What is the operating temperature range for TL4050C25IDCKT?

The TL4050C25IDCKT is specified for industrial temperature operation from –40°C to +85°C. This range is confirmed in Section 5.4 (TL4050x25I Electrical Characteristics) of the datasheet and applies to all electrical parameters including initial tolerance, tempco, and noise. It does not support the extended –40°C to +125°C range offered by Q-grade variants like TL4050C25QDCKT.

Does TL4050C25IDCKT require an output capacitor?

No, TL4050C25IDCKT does not require an output capacitor for stability. As stated in Section 8.1 and the Features list, it is designed to remain stable with all capacitive loads-including 0 µF-and adding one is optional for noise filtering only. This eliminates BOM cost and PCB area typically needed for shunt references.

What is the minimum cathode current needed for TL4050C25IDCKT to regulate properly?

The TL4050C25IDCKT requires a minimum cathode current of 60 μA (typical) and 65 μA (max over temperature) to maintain regulation within specifications. This value is explicitly listed in Table 5.4 under "IZ,min" and enables ultra-low-power operation in battery-backed or energy-harvesting systems.

How does the SC-70 package of TL4050C25IDCKT compare to SOT-23-3 variants?

The TL4050C25IDCKT uses the SC-70 (DCK) package: 2.0 mm × 2.1 mm, 0.65 mm pitch, with Anode–Cathode–NC pinout. SOT-23-3 (DBZ) variants like TL4050C25IDBZT use the same pin function order but larger 2.92 mm × 1.6 mm body and 0.95 mm pitch-making them non-drop-in replacements without PCB revision.

What is the thermal hysteresis specification for TL4050C25IDCKT?

The thermal hysteresis of TL4050C25IDCKT is 0.7 mV, defined as the voltage difference at 25°C measured after cycling to –40°C versus after cycling to 125°C. This parameter is listed in Table 5.4 under "VHYST" and reflects non-recoverable drift critical for calibration repeatability in field-deployed instruments.