Diodes Incorporated ZXRE4041ER

Overview

ZXRE4041ER from Diodes Incorporated is a precision micropower bandgap voltage reference delivering 1.225 V ±0.5% (C grade), with 20 ppm/°C typical temperature coefficient, 30 µA minimum operating current, and unconditional stability into capacitive loads - used in portable A/D converters and battery-powered instrumentation.

For engineers reviewing the ZXRE4041ER datasheet, ZXRE4041ER pinout, ZXRE4041ER application, or ZXRE4041ER equivalent, key selection criteria include knee current (30 µA), reverse dynamic impedance (0.2–0.6 Ω), wideband noise (60 µV_rms), tolerance grade compatibility, and SOT23-3 footprint constraints.

Technical Context

The ZXRE4041ER operates as a shunt-mode voltage reference, requiring an external current source and load resistor to establish bias; its bandgap core achieves stable 1.225 V output across –40°C to +125°C with minimal drift. It maintains regulation from 30 µA to 12 mA supply current without oscillation.

No internal series pass element or enable logic is present - functionality relies entirely on two-terminal operation (anode/cathode), with Pin 1 floating or tied to Pin 2 for enhanced stability per application note guidance. Reverse breakdown behavior defines reference accuracy and thermal performance.

Key Specifications

Pinout & Package

SOT23-3 package: 3-pin surface-mount plastic case (JEDEC TO-236AB), 2.80–3.04 mm length, 2.10–2.64 mm width, 1.12 mm max height; 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 ZXRE4041ER offers superior fixed-voltage accuracy (±0.5%), lowest noise (60 µV_rms), and true SOT23-3 pin compatibility - making it optimal for space-constrained, high-stability analog subsystems where reference simplicity and predictability are critical.

Availability

ZXRE4041ER 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 sourcing.

Supply support for ZXRE4041ER 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, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The ZXRE4041ER belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-accuracy analog signal conditioning in portable and space-constrained applications.

FAQ

What is the recommended external bias resistor value for ZXRE4041ER at 3.3 V supply?

At 3.3 V supply, a 15 kΩ resistor delivers ~137 µA bias current - well above the 30 µA knee and within the 12 mA absolute maximum. This ensures stable regulation while minimizing self-heating error (<0.1°C rise). For ultra-low-power use, 68 kΩ yields ~44 µA and remains robust across temperature.

Can ZXRE4041ER drive a 10 nF capacitor directly without oscillation?

Yes - the ZXRE4041ER is unconditionally stable into any capacitive load, including 10 nF ceramic capacitors. Its internal design eliminates the need for series resistance or isolation inductor, unlike many competing references that require ≥100 Ω damping for stability beyond 100 pF.

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

The C-grade (±0.5%) tolerance contributes ≤±6.1 mV initial error at 1.225 V, which dominates total reference uncertainty before tempco and noise. In factory-calibrated systems, this allows single-point trim to achieve <±0.1% full-scale accuracy over temperature, reducing test time and calibration hardware cost.

Is ZXRE4041ER compatible with lead-free reflow profiles?

Yes - the ZXRE4041ER uses standard SnAgCu (SAC305) compatible termination finish and meets JEDEC J-STD-020D moisture sensitivity level 1 (MSL-1), supporting peak reflow temperatures up to 260°C for 30 seconds without degradation to electrical parameters or package integrity.