Diodes Incorporated ZXRE4041CFTC

Overview

ZXRE4041CFTC from Diodes Incorporated is a precision micropower bandgap voltage reference delivering 1.225 V ±0.5% at 100 µA, with 20 ppm/°C typical temperature coefficient and 30 µA minimum operating current. It operates over –40°C to +125°C in SOT23-3 package and is used in battery-powered instrumentation and portable A/D converters where low quiescent current and tight initial tolerance are critical.

For engineers reviewing the ZXRE4041CFTC datasheet, ZXRE4041CFTC pinout, ZXRE4041CFTC application, or ZXRE4041CFTC equivalent, key selection criteria include knee current (30 µA), load stability under capacitive conditions, reverse dynamic impedance (0.2–0.6 Ω), noise performance (60 µV_rms, 10 Hz–10 kHz), and SOT23-3 pin compatibility with LM4041 series references.

Technical Context

The ZXRE4041CFTC implements a two-terminal shunt topology with internal bandgap core, requiring external cathode-to-anode biasing and capable of sinking up to 12 mA. Its unconditionally stable design tolerates unlimited capacitive loading without oscillation, eliminating need for output isolation resistors.

It achieves precision via curvature-corrected bandgap architecture, delivering 1.225 V nominal output with TC = 20 ppm/°C (typ) over full industrial temperature range and maintaining regulation down to 30 µA anode current - enabling ultra-low-power sensor biasing and energy-harvesting supply monitoring.

Key Specifications

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 2.80 × 2.64 × 1.12 mm body, gull-wing leads, RoHS-compliant green molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM4041CIM3X-ADJ and MAX6008AEUR+T, the ZXRE4041CFTC offers optimal balance of fixed 1.225 V accuracy, SOT23-3 drop-in compatibility, and proven stability with large capacitive loads - making it preferred for cost-sensitive, high-volume portable instrumentation where layout reuse and calibration simplicity are critical.

Availability

ZXRE4041CFTC is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition systems, and portable communication devices requiring stable component supply with guaranteed long-term availability.

Supply support for ZXRE4041CFTC 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, serving industrial, computing, consumer, and communications markets since 1966.

The ZXRE4041 belongs to Diodes' precision reference product line, engineered specifically for micropower, high-stability shunt references in space- and energy-constrained portable electronics.

FAQ

What is the maximum capacitive load the ZXRE4041CFTC can drive without instability?

The ZXRE4041CFTC is unconditionally stable and supports unlimited capacitive loading - verified per datasheet Figure 7 and application note AN-4041. No series resistance or isolation components are required, even with ≥10 µF ceramic or tantalum output capacitors. This eliminates phase-margin concerns in compact, high-density PCB layouts common in portable devices.

Can ZXRE4041CFTC replace LM4041CIM3X in existing designs?

Yes - ZXRE4041CFTC is pin-for-pin and functionally compatible with LM4041CIM3X in SOT23-3 footprint. Both share identical pinout (Anode–Cathode–NC), 1.225 V nominal output, and shunt topology. Minor differences include lower knee current (30 µA vs. 60 µA) and improved tempco (20 ppm/°C typ vs. 50 ppm/°C max), enabling direct substitution without layout or schematic changes.

How does the 0.5% tolerance affect system-level calibration?

With 0.5% initial tolerance at 25°C and 100 µA, ZXRE4041CFTC contributes ≤±6.1 mV error to a 1.225 V reference rail. In 16-bit systems (e.g., 65536 LSB full scale), this equates to <±40 LSB offset - manageable via single-point software calibration at room temperature, avoiding costly laser trimming or multi-point compensation routines.

Is ZXRE4041CFTC qualified for automotive applications?

No - ZXRE4041CFTC is rated for industrial temperature range (–40°C to +125°C) but is not AEC-Q200 qualified. It lacks automotive-specific reliability testing (e.g., HTOL, TCT, ESD HBM ≥2 kV), and Diodes' official documentation positions it for portable, computing, and industrial instrumentation - not automotive ECUs or ADAS subsystems.