Texas Instruments TL4050B41IDCKT

Overview

TL4050B41IDCKT from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 4.096V output with ±0.2% initial tolerance (max), 50ppm/°C temperature coefficient (max), 93μVRMS wideband noise, and stable operation from 68μA to 15mA cathode current across –40°C to 85°C. It serves as the voltage reference in 12-bit data-acquisition systems requiring 1mV LSB resolution.

For engineers reviewing the TL4050B41IDCKT datasheet, TL4050B41IDCKT pinout, TL4050B41IDCKT application, or TL4050B41IDCKT equivalent, key selection criteria include industrial-temperature shunt reference performance, SC-70 package compatibility, low-noise stability under capacitive loads, and direct integration with ADCs like ADS7842 without external compensation.

Technical Context

The TL4050B41IDCKT 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 circuitry achieves tight initial accuracy and low thermal drift via curvature-compensated design.

It exhibits low dynamic impedance (0.5Ω at 1mA, 120Hz), supports full-range operation from 68μA minimum cathode current up to 15mA, and remains stable with any capacitive load - eliminating mandatory output capacitance while maintaining <1.2mV output variation over 1mA–15mA current changes.

Key Specifications

Pinout & Package

TL4050B41IDCKT is packaged in SC-70 (DCK) - a 3-pin, surface-mount, space-saving package measuring 2.0mm × 2.1mm × 0.9mm with gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3041AIDBZR and ADR3440ARJZ-R7, TL4050B41IDCKT uniquely supports true shunt operation with no minimum input voltage constraint, delivers proven stability under all capacitive loads, and provides optimal cost-performance balance for industrial 12-bit data acquisition without redesigning bias networks.

Availability

TL4050B41IDCKT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered instrumentation requiring stable component supply across extended production lifecycles.

Supply support for TL4050B41IDCKT 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 company specializing in analog, embedded processing, and logic ICs, with leadership in precision analog signal chains and power management.

TL4050B41IDCKT belongs to TI's precision shunt voltage reference product line, engineered for high-accuracy, low-drift, and micropower operation in industrial, test, and portable measurement systems.

FAQ

What is the operating temperature range for TL4050B41IDCKT?

The TL4050B41IDCKT is characterized for industrial temperature operation from –40°C to +85°C. This range is explicitly defined in TI's ordering information and electrical characteristics tables for the "I" grade (e.g., TL4050B41I variants), making it suitable for factory automation, power supplies, and commercial instrumentation environments.

Does TL4050B41IDCKT require an output capacitor?

No, TL4050B41IDCKT does not require an output capacitor. Its architecture is inherently stable with all capacitive loads - including 0μF - as confirmed in the datasheet's "Stable with all capacitive loads; No output capacitor required" feature list and Section 8.1. This eliminates BOM cost and layout constraints in compact designs.

What is the minimum cathode current needed for TL4050B41IDCKT to regulate properly?

The TL4050B41IDCKT requires a minimum cathode current of 68μA (typical) and 73μA (max over temperature) to maintain regulation within specification. This value is specified in Table 5.6 (TL4050x41I Electrical Characteristics) and enables reliable operation in ultra-low-power sensor interfaces and battery-backed systems.

Can TL4050B41IDCKT be used with a 12-bit ADC such as the ADS7842?

Yes, TL4050B41IDCKT is specifically designed for use with 12-bit data-acquisition systems like the ADS7842. Its 4.096V output enables exactly 1mV LSB resolution when paired with a 5V digital supply, as documented in Figure 8-2 and Section 8.3 of the datasheet.

What package type is TL4050B41IDCKT supplied in, and what are its key mechanical features?

TL4050B41IDCKT uses the SC-70 (DCK) package: a 3-pin, gull-wing, surface-mount outline measuring 2.0mm × 2.1mm × 0.9mm. Pin 1 is Anode, Pin 2 is Cathode, and Pin 3 is NC - which must remain floating or tied to Pin 2 to avoid parasitic conduction, per Section 8.2 of the datasheet.