Texas Instruments TL4050C41IDCKT

Overview

TL4050C41IDCKT from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 4.096V output with ±0.5% initial tolerance (C grade), 50ppm/°C temperature coefficient, 93μVRMS wideband noise, 52–73μA minimum cathode current, and operation across –40°C to 85°C. It serves as the accuracy-critical voltage reference in 12-bit data-acquisition systems, battery-powered instrumentation, and industrial power-supply monitors.

For engineers reviewing the TL4050C41IDCKT datasheet, TL4050C41IDCKT pinout, TL4050C41IDCKT application, or TL4050C41IDCKT equivalent, key selection criteria include its SC-70 package footprint, shunt topology requiring no output capacitor, low dynamic impedance (0.5Ω), thermal hysteresis of 1.148mV, and compatibility with ADC/DAC reference inputs demanding LSB-level stability.

Technical Context

The TL4050C41IDCKT operates as a two-terminal shunt reference, sinking cathode current to maintain a precise reverse breakdown voltage at its cathode terminal relative to anode. Its internal bandgap-derived core achieves tight initial accuracy and low drift via curvature-compensated design.

It functions without external compensation-stable with all capacitive loads-and maintains regulation over cathode currents from 52μA to 15mA. The device's low 93μVRMS noise and 0.5Ω dynamic impedance support high-resolution analog signal chains where reference integrity directly limits system ENOB.

Key Specifications

Pinout & Package

TL4050C41IDCKT is housed in a 3-pin SC-70 (DCK) package: compact (2.0 × 1.25 × 0.9 mm), surface-mount, lead-free, and RoHS-compliant. Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC (no internal connection; must be left floating or tied to Pin 2 per TI guidance due to parasitic Schottky diode).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050B41IDCKT, TL4050C41IDCKT trades 0.3% initial accuracy for lower cost in volume production; versus REF3040AIDBZR, it offers simpler biasing and zero dropout but lacks sourcing capability-making it optimal for low-current, space-constrained shunt reference roles.

Availability

TL4050C41IDCKT is available at Aetrix Electronics and suitable for data-acquisition systems, portable instrumentation, and industrial power-supply monitors requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.

Supply support for TL4050C41IDCKT 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 leadership 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 TL4050C41IDCKT?

The TL4050C41IDCKT is rated for industrial temperature operation from –40°C to +85°C. This range is confirmed in Section 5.6 (TL4050x41I Electrical Characteristics) of the datasheet and applies to all C-grade variants in SC-70 packaging. It does not support the extended –40°C to +125°C range offered by Q-grade versions like TL4050C41QDCKT.

Does TL4050C41IDCKT require an output capacitor?

No, TL4050C41IDCKT 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 zero capacitance-eliminating the need for external bypass components and simplifying layout in noise-sensitive applications.

What is the minimum cathode current needed for TL4050C41IDCKT to regulate properly?

The TL4050C41IDCKT requires a minimum cathode current of 52μA (typical) at 25°C, rising to 73μA maximum across the full –40°C to +85°C range. This value is specified in Table 5.6 under "IZ,min" and defines the lowest bias current that guarantees regulation within tolerance and tempco specifications.

How does the noise performance of TL4050C41IDCKT compare to other 4.096V references?

TL4050C41IDCKT delivers 93μVRMS wideband noise (10Hz–10kHz), as measured at 100μA cathode current. This is higher than the 41μVRMS of the 2.5V TL4050C25IDCKT but optimized for its 4.096V bandgap architecture. For 12-bit systems, this noise contributes <0.1 LSB RMS, making it suitable for most precision measurement applications without additional filtering.

Can TL4050C41IDCKT be used as a direct replacement for TL4050A41IDCKT?

TL4050C41IDCKT is pin-compatible and functionally identical to TL4050A41IDCKT in SC-70 packaging, but with relaxed initial tolerance (±0.5% vs. ±0.1%) and same tempco (±50ppm/°C). It is not a drop-in replacement where 0.1% accuracy is required-but is fully interchangeable where cost-driven tolerance budgets allow ±0.5%.