Texas Instruments TL4050C10IDBZR

Overview

TL4050C10IDBZR from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 10V output with ±0.5% initial tolerance (max), 50ppm/°C temperature coefficient, 150μVRMS wideband noise, 0.7Ω dynamic impedance at 1mA, and operation across –40°C to 85°C. It serves as the voltage reference in high-resolution ADCs, battery-powered instrumentation, and industrial power-supply monitors where low quiescent current and capacitive-load stability are critical.

For engineers reviewing the TL4050C10IDBZR datasheet, TL4050C10IDBZR pinout, TL4050C10IDBZR application, or TL4050C10IDBZR equivalent, this page provides verified specifications, SOT-23-3 terminal mapping, real-world use cases in data acquisition and energy management, and validated alternative options for cost-performance trade-offs.

Technical Context

The TL4050C10IDBZR operates as a two-terminal shunt reference requiring only an external series resistor to regulate cathode current between 100μA (min) and 15mA (max). Its internal bandgap core achieves 10V reverse breakdown with thermal hysteresis of 2.8mV over –40°C to 125°C cycling.

No output capacitor is required-stability is guaranteed across all capacitive loads due to low dynamic impedance (0.7Ω typical at 1mA) and inherent phase margin. The device draws only 100μA typical minimum cathode current, enabling use in ultra-low-power systems such as portable test equipment and remote sensors.

Key Specifications

Pinout & Package

SOT-23-3 package (DBZ) with 1.4mm × 2.9mm footprint and 1.1mm height; compatible with standard pick-and-place and reflow processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050B10IDBZR, the TL4050C10IDBZR trades 0.3% initial accuracy for lower unit cost and identical thermal performance; compared with REF3010AIDBZR, it retains true shunt functionality and wider operating current range but lacks supply-rejection capability.

Availability

TL4050C10IDBZR is available at Aetrix Electronics and suitable for data-acquisition systems, industrial power-supply monitors, and portable instrumentation requiring stable component supply with consistent parametric performance across production lots.

Supply support for TL4050C10IDBZR 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 since 1930.

The TL4050 series was designed for cost-sensitive, space-constrained applications needing stable shunt references-targeting portable instrumentation, industrial sensors, and battery-powered data loggers.

FAQ

What is the minimum cathode current required for TL4050C10IDBZR to regulate properly?

The TL4050C10IDBZR requires a minimum cathode current of 100μA typical (103μA max over temperature) to maintain regulation within specification. Below this threshold, output voltage deviates from 10V; design RS to ensure IZ ≥ 100μA under worst-case low-VS and high-IL conditions. This value is confirmed in Section 5.10 of the TL4050 datasheet for the C-grade 10V industrial variant.

Can TL4050C10IDBZR be used with large output capacitors?

Yes-TL4050C10IDBZR is explicitly designed to remain stable with all capacitive loads, including ceramic, tantalum, and electrolytic capacitors up to 10µF. No output capacitor is required, but adding one does not risk oscillation. This behavior stems from its low dynamic impedance (0.7Ω) and internal compensation, as stated in the "Stable with all capacitive loads" feature and Section 8.1 of the datasheet.

What is the thermal hysteresis specification for TL4050C10IDBZR?

The thermal hysteresis of TL4050C10IDBZR is 2.8mV maximum, defined as the difference between VZ measured at 25°C after cycling to –40°C versus after cycling to 125°C. This parameter directly impacts long-term calibration stability in field-deployed equipment subject to repeated temperature extremes, and is specified in Table 5.10 of the official TL4050 datasheet.

Is TL4050C10IDBZR pin-compatible with other TL4050 variants?

Yes-TL4050C10IDBZR uses the SOT-23-3 (DBZ) package and shares identical pinout (Anode-Pin1, Cathode-Pin2, NC-Pin3) with all TL4050x10I/TL4050x10Q variants in DBZ packaging. Mechanical compatibility is confirmed in TI's Package Drawing SLMS152 and Ordering Table 9-1, which lists TL4050C10IDBZR, TL4050B10IDBZR, and TL4050A10IDBZR under the same DBZ footprint.

Does TL4050C10IDBZR require a heatsink in 15mA operation?

No-TL4050C10IDBZR dissipates a maximum of 150mW (10V × 15mA) in SOT-23-3 (θJA = 206°C/W). At TA = 85°C, junction temperature reaches ~116°C-within the 150°C absolute max rating. Derating is not required for continuous operation at full current; thermal performance is validated in Absolute Maximum Ratings (Section 5.1) and TI's thermal modeling for DBZ packages.