Texas Instruments TL4050B50IDBZTG4

Overview

TL4050B50IDBZTG4 from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 5.0V output with ±0.2% initial tolerance (max), 50ppm/°C temperature coefficient (max), 93μVRMS wideband noise, and operation across –40°C to 125°C. It functions as a two-terminal voltage reference in analog signal chains, ADC/DAC biasing, and power-supply monitoring circuits where low quiescent current and high stability are critical.

For engineers reviewing the TL4050B50IDBZTG4 datasheet, TL4050B50IDBZTG4 pinout, TL4050B50IDBZTG4 application, or TL4050B50IDBZTG4 equivalent, key selection criteria include cathode current range (74μA min to 15mA max), dynamic impedance (0.5Ω at 1mA), thermal hysteresis (1.4mV), long-term stability (120ppm/1000h), and SOT-23-3 package compatibility with high-noise environments.

Technical Context

The TL4050B50IDBZTG4 operates as a two-terminal shunt reference requiring no external output capacitor and remaining stable with all capacitive loads. Its internal bandgap core delivers fixed 5.0V reverse breakdown voltage with tight initial accuracy and low drift over temperature and operating current.

It features low dynamic impedance (0.5Ω) and low wideband noise (93μVRMS), enabling high-resolution data acquisition and precision instrumentation. The device supports cathode currents from 74μA (min) up to 15mA while maintaining specified voltage regulation and thermal performance across its full –40°C to 125°C extended temperature range.

Key Specifications

Pinout & Package

TL4050B50IDBZTG4 is housed in a 3-pin SOT-23-3 package (DBZ) with standard pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC (no internal connection; must be left floating or tied to Pin 2 per TI design guidance).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050B50QDBZR, TL4050B50IDBZTG4 offers identical electrical specs but smaller packaging for evaluation; versus REF3050AIDBZR, it provides true two-terminal simplicity and lower operating current at the cost of slightly higher noise-making it optimal for shunt-regulated, battery-sensitive designs.

Availability

TL4050B50IDBZTG4 is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and automotive electronics requiring stable component supply with guaranteed long-term sourcing and traceable manufacturing.

Supply support for TL4050B50IDBZTG4 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 precision reference design expertise.

The TL4050 product line delivers micropower shunt voltage references optimized for high-accuracy, low-drift applications in portable, industrial, and automotive systems where space, power, and thermal stability are critical.

FAQ

What is the output voltage and initial accuracy of TL4050B50IDBZTG4?

TL4050B50IDBZTG4 provides a nominal 5.0V output voltage with ±0.2% initial tolerance (maximum) at 25°C. This specification is verified across production lots and ensures ≤10mV absolute error in precision analog circuits, making TL4050B50IDBZTG4 suitable for 12-bit data acquisition and calibrated sensor interfaces where reference accuracy directly impacts measurement fidelity.

Does TL4050B50IDBZTG4 require an external output capacitor?

No, TL4050B50IDBZTG4 does not require an external output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads-including direct connection to ADC input capacitors or long PCB traces-eliminating the need for additional components and simplifying layout in compact designs where TL4050B50IDBZTG4 serves as the primary voltage reference.

What is the operating temperature range of TL4050B50IDBZTG4?

TL4050B50IDBZTG4 is characterized for operation across –40°C to 125°C, meeting extended temperature requirements for under-hood automotive, industrial motor control, and outdoor energy metering applications. This range is explicitly confirmed in the TL4050x50Q datasheet section and applies to TL4050B50IDBZTG4 as a Q-grade variant, ensuring reliable performance where ambient extremes challenge conventional references.

How much current does TL4050B50IDBZTG4 draw in normal operation?

TL4050B50IDBZTG4 draws a minimum cathode current of 74μA (typical) at 25°C and operates up to 15mA maximum. Its wide 74μA–15mA range allows flexible biasing in both ultra-low-power battery systems and higher-current precision supplies-enabling TL4050B50IDBZTG4 to serve as a reference in everything from wearable health monitors to programmable logic controller analog inputs.

What package type and pin configuration does TL4050B50IDBZTG4 use?

TL4050B50IDBZTG4 uses the SOT-23-3 (DBZ) package with Pin 1 = Cathode, Pin 2 = Anode, and Pin 3 = NC (no internal connection). Per TI's application note, Pin 3 must be left floating or tied to Pin 2 to avoid unintended conduction through the internal parasitic Schottky diode-ensuring correct two-terminal shunt reference behavior in all implementations using TL4050B50IDBZTG4.