Texas Instruments TL4050C50IDBZT

Overview

TL4050C50IDBZT from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 5.0V output with ±25mV (±0.5%) initial tolerance at 25°C, 50ppm/°C max temperature coefficient, 93μVRMS wideband noise, and stable operation from 56μA to 15mA cathode current - used in high-accuracy ADC biasing and portable power-supply monitoring.

For engineers reviewing the TL4050C50IDBZT datasheet, TL4050C50IDBZT pinout, TL4050C50IDBZT application, or TL4050C50IDBZT equivalent, key selection criteria include industrial-grade (–40°C to 85°C) operation, SOT-23-3 package compatibility, low-noise performance for 12-bit data acquisition, and shunt topology suitability for space-constrained, low-quiescent-current designs.

Technical Context

The TL4050C50IDBZT operates as a two-terminal shunt reference requiring no external capacitor for stability and maintaining regulation across capacitive loads up to 100nF. Its internal bandgap core achieves tight initial accuracy and low thermal drift via curvature-compensated design.

It functions within a cathode current range of 56μA (min) to 15mA (max), with dynamic impedance of 0.5Ω at 1mA/120Hz and thermal hysteresis of 1.4mV over –40°C to 125°C cycling - enabling reliable reference performance in battery-powered instrumentation and automotive sensor interfaces.

Key Specifications

Pinout & Package

SOT-23-3 package (DBZ) with 1.0mm pitch, 2.92mm × 1.3mm footprint, and 1.1mm height - optimized for automated placement and high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3050AIDBZR and LM4040C50IDBZR, TL4050C50IDBZT delivers balanced performance: tighter tempco than LM4040C50IDBZR for wider ambient operation, and lower cost than REF3050AIDBZR while maintaining adequate noise and stability for 12-bit applications.

Availability

TL4050C50IDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply with guaranteed long-term continuity.

Supply support for TL4050C50IDBZT 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, designed specifically for low-power, high-accuracy applications including portable instrumentation, sensor signal conditioning, and energy-efficient power monitoring.

FAQ

What is the operating temperature range for TL4050C50IDBZT?

The TL4050C50IDBZT is rated for industrial temperature operation from –40°C to +85°C. It is not qualified for the extended –40°C to +125°C range (which applies to Q-grade variants like TL4050C50QDBZT). This makes TL4050C50IDBZT suitable for indoor industrial controls and consumer test equipment but not under-hood automotive applications.

Does TL4050C50IDBZT require an output capacitor?

No, TL4050C50IDBZT does not require an output capacitor for stability. It is explicitly designed to remain stable with all capacitive loads, including up to 100nF, eliminating the need for external bypass components. This simplifies layout and reduces BOM count in compact, low-power designs.

What is the minimum cathode current needed for TL4050C50IDBZT to regulate properly?

The TL4050C50IDBZT requires a minimum cathode current of 56μA at 25°C (80μA over full –40°C to +85°C range) to maintain regulation. Below this, output voltage deviates beyond specification. Designers must size the series resistor (RS) to ensure this current is met even at worst-case low input voltage and high load current.

How does the noise performance of TL4050C50IDBZT compare to other 5V shunt references?

TL4050C50IDBZT delivers 93μVRMS wideband noise (10Hz–10kHz), which is higher than REF3050AIDBZR (42μVRMS) but comparable to LM4040C50IDBZR (41μVRMS). Its noise level is sufficient for 12-bit systems (LSB = 1.22mV at 5V), where reference noise contributes <1% of total error budget.

Can TL4050C50IDBZT be used in place of TL4050A50IDBZT or TL4050B50IDBZT?

Yes, TL4050C50IDBZT can substitute for TL4050A50IDBZT or TL4050B50IDBZT in applications tolerant of ±0.5% initial accuracy. However, it offers looser tolerance (±0.5% vs. ±0.1% or ±0.2%) and identical tempco (50ppm/°C), so system-level calibration or margin analysis is required before replacement in high-accuracy designs.