Texas Instruments TL4050B10IDBZR

Overview

TL4050B10IDBZR from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 10V output with ±0.2% initial tolerance (max), 50ppm/°C temperature coefficient (max), 150μVRMS wideband noise, and operation from –40°C to 85°C. It requires no output capacitor, supports cathode currents from 100μA to 15mA, and serves as a primary reference in high-resolution ADCs and industrial power-supply monitors.

For engineers reviewing the TL4050B10IDBZR datasheet, TL4050B10IDBZR pinout, TL4050B10IDBZR application, or TL4050B10IDBZR equivalent, key selection criteria include its 10V fixed output, B-grade accuracy, SOT-23-3 package compatibility, low-noise performance in battery-powered instrumentation, and thermal hysteresis of 2.8mV over –40°C to 125°C cycling.

Technical Context

The TL4050B10IDBZR operates as a two-terminal shunt reference, sinking current through its cathode to maintain a precise 10V reverse breakdown voltage across anode-to-cathode terminals. Its internal bandgap architecture ensures stability across 100μA–15mA cathode current and –40°C to 85°C ambient temperature.

It exhibits 0.7Ω typical dynamic impedance at 1mA, 150μVRMS noise (10Hz–10kHz), and thermal hysteresis of 2.8mV - critical for repeatable measurements in process control and energy metering where long-term drift and thermal history affect calibration integrity.

Key Specifications

Pinout & Package

SOT-23-3 package (DBZ): ultra-compact 2.92mm × 1.3mm surface-mount outline with gull-wing leads, optimized for space-constrained PCB layouts in portable and modular systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3010AIDBZR and ADR3410ARJZ-R7, TL4050B10IDBZR offers superior noise performance and unconditional capacitive-load stability at the expense of slightly relaxed initial tolerance - making it optimal for ruggedized, space-constrained industrial sensing where reliability trumps marginal accuracy gains.

Availability

TL4050B10IDBZR is available at Aetrix Electronics and suitable for industrial process control, portable data acquisition, and automotive battery monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL4050B10IDBZR 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 over 90 years of innovation in precision analog ICs.

The TL4050 series targets cost-sensitive, space-constrained applications demanding micropower shunt references with guaranteed stability - especially in portable instrumentation, industrial sensors, and automotive subsystems where SOT-23 footprint and zero-output-capacitor operation are critical.

FAQ

What is the minimum cathode current required for stable operation of TL4050B10IDBZR?

The TL4050B10IDBZR requires a minimum cathode current of 100μA at 25°C (103μA over full –40°C to 85°C range) to maintain regulation within specifications. This value is confirmed in Section 5.10 of the TI datasheet under "IZ,min" for the TL4050B10I variant. Operating below this threshold risks output voltage deviation exceeding ±0.2% tolerance.

Does TL4050B10IDBZR require an external output capacitor for stability?

No, TL4050B10IDBZR does not require an external output capacitor. As stated in Section 8.1 and Feature list, it is designed to be stable with all capacitive loads - including 0pF - eliminating the need for bypass capacitors in most applications. Adding capacitance may reduce noise but is never mandatory for loop stability.

What is the thermal hysteresis specification for TL4050B10IDBZR?

The thermal hysteresis of TL4050B10IDBZR is 2.8mV, defined as the difference between its 25°C output voltage measured after cycling to –40°C versus after cycling to 125°C. This value is explicitly listed in Table 5.10 and applies to the TL4050B10I grade, directly confirming repeatability behavior in thermally cycled environments like automotive ECUs.

Can TL4050B10IDBZR be used in applications requiring operation beyond 85°C ambient?

No - TL4050B10IDBZR is rated for –40°C to 85°C ambient operation (industrial grade, "I" suffix). For extended temperature use up to 125°C, the Q-grade variant TL4050B10QDBZR must be selected. The "I" and "Q" variants differ in characterization and screening; substituting TL4050B10IDBZR above 85°C violates recommended operating conditions and risks parametric shift or failure.

How does the noise performance of TL4050B10IDBZR compare to other 10V shunt references?

TL4050B10IDBZR delivers 150μVRMS wideband noise (10Hz–10kHz), which is lower than REF3010AIDBZR (210μVRMS) but higher than ADR3410ARJZ-R7 (105μVRMS). This places TL4050B10IDBZR in the mid-tier for noise among 10V shunt references - sufficient for 16-bit systems but limiting for 18-bit+ precision digitization unless filtered externally.