Texas Instruments TL4050A10IDBZR

Overview

TL4050A10IDBZR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V output with ±0.1% initial tolerance (A grade), 50ppm/°C max temperature coefficient, 150μVRMS wideband noise, 0.7Ω dynamic impedance at 1mA, and operation across –40°C to 85°C. It serves as a stable reference in high-resolution ADCs, battery-powered instrumentation, and industrial power-supply monitors where low drift and minimal quiescent current are critical.

For engineers reviewing the TL4050A10IDBZR datasheet, TL4050A10IDBZR pinout, TL4050A10IDBZR application, or TL4050A10IDBZR equivalent, this page delivers verified electrical specifications, SOT-23-3 terminal mapping, real-world use cases in data acquisition and energy management, and two validated alternative parts with documented performance trade-offs.

Technical Context

The TL4050A10IDBZR operates as a two-terminal shunt reference requiring no external capacitor for stability and maintaining regulation over cathode currents from 100μA to 15mA. Its bandgap-based core achieves tight initial accuracy and low thermal hysteresis (2.8mV) while supporting all capacitive loads without oscillation risk.

Designed for industrial temperature range (–40°C to 85°C), it features low dynamic impedance (0.7Ω @ 1mA), 150μVRMS noise (10Hz–10kHz), and long-term stability of 120ppm after 1000 hours - enabling direct replacement of higher-power references in space-constrained, low-noise analog signal chains.

Key Specifications

Pinout & Package

SOT-23-3 package (DBZ) with gull-wing leads, 1.9mm pitch, and 1.1mm height. RoHS-compliant, halogen-free, and rated for 252°C reflow peak temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050A10IDBZR, REF3010AIDBZR trades 0.1% accuracy for lower noise and higher drive capability, while ADR3410ARJZ-R7 offers better temperature stability and noise at the cost of added capacitance and non-drop-in pin compatibility.

Availability

TL4050A10IDBZR is available at Aetrix Electronics and suitable for portable instrumentation, industrial power-supply monitors, and energy metering applications requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for TL4050A10IDBZR 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 and embedded processing technologies, with over 90 years of innovation in precision analog ICs and power management solutions.

The TL4050 series belongs to TI's precision voltage reference product line, engineered for high-accuracy, low-drift, micropower operation in data acquisition, test equipment, and industrial control systems where reliability and parametric consistency are critical.

FAQ

What is the minimum cathode current required for TL4050A10IDBZR to maintain regulation?

The TL4050A10IDBZR requires a minimum cathode current of 100μA typical (103μA maximum over –40°C to +85°C) to sustain 10V regulation. Below this threshold, output voltage drops nonlinearly; design must ensure series resistor RS provides ≥103μA even at lowest supply voltage and highest load current. This value is confirmed in Section 5.10 of the TI datasheet.

Does TL4050A10IDBZR require an output capacitor for stability?

No, TL4050A10IDBZR does not require an output capacitor for stability. Its internal architecture is inherently stable with all capacitive loads, including 0μF. Adding a capacitor (e.g., 100nF) may reduce high-frequency noise but is never mandatory - a key advantage over many series references. This is explicitly stated in the "Features" and "Application Information" sections of the official datasheet.

What is the thermal hysteresis specification for TL4050A10IDBZR?

The thermal hysteresis of TL4050A10IDBZR is 2.8mV, defined as the difference between VZ measured at 25°C after cycling to –40°C versus after cycling to +125°C. This parameter quantifies reversible voltage shift due to thermal history and directly impacts repeatability in systems undergoing repeated temperature excursions, such as outdoor industrial controllers.

Can TL4050A10IDBZR be used in automotive under-hood applications?

TL4050A10IDBZR is rated for –40°C to +85°C ambient operation (I-grade), making it suitable for automotive cabin and infotainment modules but not under-hood environments exceeding 85°C. For under-hood use, TI recommends the Q-grade variant TL4050A10QDBZR (–40°C to +125°C), which shares identical electrical specs but is qualified to extended temperature standards.

How does the dynamic impedance of TL4050A10IDBZR affect ADC reference performance?

With a dynamic impedance of 0.7Ω at 1mA, TL4050A10IDBZR limits voltage droop to ≤700μV during 1mA transient load steps - critical when driving switched-capacitor ADC inputs. This low impedance prevents reference settling errors that would otherwise degrade effective resolution in multiplexed or high-speed sampling systems.