Texas Instruments TL4050C10QDBZR

Overview

TL4050C10QDBZR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V output with ±0.5% initial tolerance, 50ppm/°C temperature coefficient, 150μVRMS wideband noise, and operation across –40°C to 125°C. It serves as a stable voltage基准 in high-resolution ADC/DAC biasing, industrial power-supply monitoring, and battery-powered instrumentation.

For engineers reviewing the TL4050C10QDBZR datasheet, TL4050C10QDBZR pinout, TL4050C10QDBZR application, or TL4050C10QDBZR equivalent, key selection criteria include cathode current range (80–100μA min to 15mA max), dynamic impedance (0.7Ω at 1mA), thermal hysteresis (2.8mV), long-term stability (120ppm), and SOT-23-3 package compatibility with high-EMI environments.

Technical Context

The TL4050C10QDBZR operates as a two-terminal shunt reference requiring no external capacitor for stability and supporting all capacitive loads. Its internal bandgap architecture delivers low dynamic impedance (0.7Ω) and low noise (150μVRMS) over 10Hz–10kHz, enabling high-accuracy analog signal chains.

Designed for extended temperature operation (–40°C to 125°C), it maintains specified performance across its full cathode current range (80–100μA minimum to 15mA maximum) and exhibits thermal hysteresis of 2.8mV after cycling between –40°C and 125°C.

Key Specifications

Pinout & Package

TL4050C10QDBZR is housed in a SOT-23-3 package (DBZ) with 1.0mm pitch, 2.92mm × 1.3mm footprint, and thermal resistance θ_JA = 206°C/W. Pin 1 is Anode, Pin 2 is Cathode, Pin 3 is NC (no connection) - internally floating or tied to Pin 2 per TI recommendation to avoid parasitic Schottky conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3010AIDBZR and LM4040C10IDBZR, TL4050C10QDBZR uniquely combines extended temperature range (–40°C to 125°C), shunt topology independence from supply rails, and guaranteed 50ppm/°C tempco - making it the only option among the three qualified for automotive under-hood and high-reliability industrial control.

Availability

TL4050C10QDBZR is available at Aetrix Electronics and suitable for data-acquisition systems, industrial power-supply monitors, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL4050C10QDBZR 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 industrial-grade components.

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

FAQ

What is the minimum cathode current required for stable regulation of TL4050C10QDBZR?

The TL4050C10QDBZR requires a minimum cathode current of 80–100μA at 25°C, rising to 110μA across its full –40°C to 125°C operating range. This value ensures the internal bandgap circuit remains active and maintains 10V output within ±0.5% tolerance. Operating below this threshold risks output collapse or increased drift, especially at temperature extremes.

Does TL4050C10QDBZR require an output capacitor for stability?

No, TL4050C10QDBZR does not require an output capacitor for stability. Its design is inherently stable with all capacitive loads, including 0μF. Adding a capacitor may reduce high-frequency noise but introduces no risk of oscillation - a key advantage over series references that mandate specific ESR/C values.

How does the thermal hysteresis of TL4050C10QDBZR affect system calibration?

TL4050C10QDBZR exhibits 2.8mV thermal hysteresis - the non-recoverable voltage shift observed after cycling between –40°C and 125°C and returning to 25°C. In metrology-grade instruments, this represents a fixed offset that must be characterized during final calibration and compensated in firmware or hardware trimming to maintain sub-0.03% absolute accuracy.

Can TL4050C10QDBZR be used in high-EMI environments such as near motor drives or switching power supplies?

Yes, TL4050C10QDBZR is suitable for high-EMI environments. TI recommends connecting Pin 3 (NC) to Pin 2 (Cathode) to suppress parasitic Schottky conduction induced by electromagnetic coupling. Its shunt topology also avoids ground-loop sensitivity common in series references, improving noise immunity in noisy industrial settings.

What is the dynamic impedance of TL4050C10QDBZR and why does it matter in power-supply monitor circuits?

TL4050C10QDBZR has a dynamic impedance of 0.7Ω at 1mA cathode current. In power-supply monitor circuits, this low value ensures the reference voltage shifts less than 0.7mV for every 1mA change in load or cathode current - critical for maintaining accurate overvoltage/undervoltage detection thresholds despite varying load conditions or ripple currents.