Texas Instruments TL4050B10QDBZT

Overview

TL4050B10QDBZT from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V output with ±0.2% initial tolerance (max), 50ppm/°C temperature coefficient (max), 150μVRMS wideband noise, and stable operation from –40°C to 125°C. It functions as a two-terminal reference in analog signal chains, ADC/DAC biasing, and power-supply monitoring circuits where high accuracy and thermal stability are required.

For engineers reviewing the TL4050B10QDBZT datasheet, TL4050B10QDBZT pinout, TL4050B10QDBZT application, or TL4050B10QDBZT equivalent, this page provides verified electrical specifications, SOT-23-3 terminal mapping, real-world use cases in data acquisition and automotive systems, and validated alternative options for design flexibility under extended temperature conditions.

Technical Context

The TL4050B10QDBZT operates as a two-terminal shunt reference requiring no external output capacitor and remains stable across all capacitive loads. Its internal bandgap core delivers low dynamic impedance (0.7Ω at 1mA) and tight voltage regulation over cathode current (100μA to 15mA) and full industrial-to-automotive temperature range.

It features a parasitic Schottky diode between pins 2 and 3 in the SOT-23-3 package, mandating that pin 3 be left floating or tied to pin 2. Thermal hysteresis is specified at 2.8mV over –40°C to 125°C cycling, and long-term stability is 120ppm after 1000 hours at 25°C.

Key Specifications

Pinout & Package

SOT-23-3 package (DBZ suffix), surface-mount, 1.3mm × 2.9mm footprint, rated for 206°C/W junction-to-ambient thermal resistance. Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC (no connection - must float or tie to Pin 2 due to internal Schottky diode).

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5010IDR and LM4040B10IDCKR, TL4050B10QDBZT offers the optimal balance of 50ppm/°C drift, 150μVRMS noise, and micropower operation in the smallest SOT-23-3 footprint-making it ideal for automotive and portable instrumentation where thermal performance and size are critical.

Availability

TL4050B10QDBZT is available at Aetrix Electronics and suitable for industrial process control, automotive diagnostics, and portable test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TL4050B10QDBZT 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 and embedded processing technologies, with leadership in precision analog ICs and automotive-grade components.

The TL4050 series belongs to TI's precision voltage reference product line, engineered for high-accuracy, low-drift, and micropower operation in demanding industrial, automotive, and instrumentation applications.

FAQ

What is the maximum cathode current rating for TL4050B10QDBZT?

The absolute maximum cathode current for TL4050B10QDBZT is 15mA, as specified in the Absolute Maximum Ratings table. Operating above this limit risks permanent damage. The recommended operating range is 100μA to 15mA, with minimum cathode current guaranteed at 100μA typical and 110μA maximum across –40°C to 125°C. TL4050B10QDBZT must maintain current within this window to ensure stable 10V output regulation.

Does TL4050B10QDBZT require an external output capacitor?

No, TL4050B10QDBZT does not require an external output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads, including direct connection to ADC reference inputs or large bulk capacitance. Adding a capacitor may reduce high-frequency noise but is never necessary for loop stability - a key advantage over many competing shunt references.

What is the thermal hysteresis specification for TL4050B10QDBZT?

TL4050B10QDBZT has a thermal hysteresis of 2.8mV, defined as the difference in 10V output measured at 25°C after cycling from –40°C versus after cycling from 125°C. This parameter directly impacts repeatability in systems undergoing repeated thermal cycles, such as automotive ECUs or outdoor industrial controllers. TL4050B10QDBZT's 2.8mV value reflects its optimized die construction for minimal memory effect.

Can TL4050B10QDBZT be used in a series-reference configuration?

No, TL4050B10QDBZT is strictly a two-terminal shunt voltage reference and cannot operate as a series reference. It sinks current from a higher-voltage source through an external resistor (RS) to establish the 10V reference at its cathode. Attempting to use it in series mode violates its functional architecture and will result in incorrect or unstable output. TL4050B10QDBZT must always be connected with cathode as output and anode as ground reference.

What is the ESD rating of TL4050B10QDBZT?

TL4050B10QDBZT is rated for ±2000V per the Human Body Model (HBM) ESD standard, as confirmed in Section 5.2 of the datasheet. This rating applies to all pins except the feedback node (not present in TL4050B10QDBZT). No additional ESD protection circuitry is required during PCB handling or assembly, provided standard ESD-safe practices are followed. TL4050B10QDBZT's robustness simplifies layout and reduces bill-of-materials cost.