Diodes Incorporated ZXRE1004EN8TA

Overview

ZXRE1004EN8TA from Diodes Incorporated is a 1.22 V micropower bandgap voltage reference IC with 4 µA typical knee current, 1% initial tolerance, and 20 ppm/°C typical temperature coefficient, housed in an SOT23-3 package. It operates stably from 8 µA to 20 mA supply current and supports precision analog functions in space-constrained, battery-powered systems.

For engineers reviewing the ZXRE1004EN8TA datasheet, ZXRE1004EN8TA pinout, ZXRE1004EN8TA application, or ZXRE1004EN8TA equivalent, key selection criteria include ultra-low quiescent current, tight thermal drift, capacitive-load immunity, and compatibility with legacy references such as LT1004 and LM385 in portable instrumentation and data acquisition signal chains.

Technical Context

The ZXRE1004EN8TA implements a two-terminal shunt-mode bandgap reference architecture, requiring external current sourcing and delivering a stable 1.22 V output across its 8 µA–20 mA operating range. Its unconditionally stable design tolerates unlimited capacitive loading without oscillation.

It achieves 20 ppm/°C typical temperature coefficient over –40°C to +85°C and maintains ±1 mV reverse breakdown voltage change from 8 µA to 1 mA supply current. Dynamic impedance is 0.2 Ω at 1 mA, enabling low-noise performance in high-resolution ADC/DAC biasing.

Key Specifications

Pinout & Package

SOT23-3 surface-mount package (1.12 mm height, 2.80–3.04 mm length, 2.10–2.64 mm width) with gull-wing leads; JEDEC MO-203AA compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1004CZ-1.2 and LM385B-1.2/NOPB, the ZXRE1004EN8TA delivers superior power efficiency (4 µA vs. ≥10 µA), lower thermal drift (20 vs. ≥50 ppm/°C), and smaller footprint (SOT23 vs. TO-92/SOIC), making it optimal for next-generation portable and battery-critical systems where size and energy budget are constrained.

Availability

ZXRE1004EN8TA is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, and portable communication devices requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for ZXRE1004EN8TA 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-efficiency power management, signal integrity, and precision analog solutions for industrial, computing, and consumer markets.

The ZXRE1004 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, high-stability analog signal conditioning in portable and energy-sensitive applications.

FAQ

What is the minimum operating current for stable regulation?

The ZXRE1004EN8TA achieves stable regulation at a typical knee current of 4 µA, with guaranteed operation starting at 8 µA across the full temperature range. Below 8 µA, output voltage may deviate beyond specifications due to insufficient bandgap bias current; design must ensure ≥8 µA sourcing under worst-case conditions.

Can it drive capacitive loads directly without external compensation?

Yes-the ZXRE1004EN8TA is unconditionally stable with any capacitive load, including large ceramic bypass capacitors (≥10 µF) commonly used on ADC or microcontroller reference inputs. No series resistor or isolation network is required, simplifying layout and improving transient response.

How does its 1.22 V reference compare to standard 1.25 V or 2.5 V references?

The 1.22 V output aligns with the intrinsic bandgap voltage of silicon at 25°C, minimizing curvature correction complexity and enabling higher inherent accuracy. It is optimized for low-voltage systems (e.g., 1.8 V or 3.3 V rails) where headroom is limited, unlike 2.5 V references that require ≥3 V supply and dissipate more power.

Is this part suitable for automotive applications?

The ZXRE1004EN8TA is not AEC-Q100 qualified and is not recommended for automotive safety-critical systems. Diodes offers automotive-grade alternatives (e.g., AP2112K) for such applications; consult Diodes' automotive product definitions page for qualified voltage references meeting PPAP and IATF 16949 requirements.