Diodes Incorporated ZRC330F03TA

Overview

ZRC330F03TA from Diodes Incorporated is a precision 3.3 V bandgap voltage reference IC in SOT23-3 package, featuring ±3% initial tolerance, 15 µA typical knee current, 0.6 Ω typical slope resistance, and stable operation without external capacitor-used in low-power precision analog signal conditioning and crystal oscillator biasing.

For engineers reviewing the ZRC330F03TA datasheet, ZRC330F03TA pinout, ZRC330F03TA application, or ZRC330F03TA equivalent, key selection criteria include knee current (15 µA), temperature coefficient (15–50 ppm/°C), dynamic impedance (0.5–1.2 Ω), noise (75 µV_rms, 10 Hz–10 kHz), and industrial temperature range (−40°C to +85°C).

Technical Context

The ZRC330F03TA implements a bandgap-based reverse-breakdown architecture optimized for micropower operation, delivering stable 3.3 V reference voltage with no external stabilization capacitor required. Its low knee current enables reliable startup at 15 µA, while slope resistance of 0.6 Ω ensures minimal load regulation error across 20 µA–5 mA operating range.

Thermal stability is achieved via internal curvature compensation, yielding 15–50 ppm/°C average TC over −40°C to +85°C. Wideband noise is specified at 75 µV_rms (10 Hz–10 kHz), supporting high-resolution ADC biasing and low-jitter oscillator applications.

Key Specifications

Pinout & Package

Package: SOT23-3 (JEDEC MO-178AA), surface-mount, green molding compound (Br/Sb-free). Dimensions: 2.9 mm × 1.3 mm × 1.0 mm (L × W × H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV431AIDBZR and MAX6003EUR+T, ZRC330F03TA offers the lowest knee current (15 µA) and simplest implementation (no resistors or enable logic), making it optimal for always-on, space-limited, low-cost precision reference roles where ±3% accuracy suffices.

Availability

ZRC330F03TA is available at Aetrix Electronics and suitable for battery-powered portable meters, precision crystal oscillator biasing, and industrial data acquisition front-ends requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZRC330F03TA 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, cost-optimized components for industrial, computing, and consumer markets.

The ZRC330 series belongs to Diodes' precision voltage reference product line, engineered specifically for micropower, capacitor-free operation in space- and current-constrained analog subsystems.

FAQ

What is the minimum operating current for stable regulation of ZRC330F03TA?

The ZRC330F03TA achieves stable regulation at a typical knee current of 15 µA, with guaranteed operation starting at 20 µA across the full industrial temperature range. Below 20 µA, output voltage may deviate beyond ±3% tolerance due to insufficient bandgap bias current.

Can ZRC330F03TA drive capacitive loads without oscillation?

Yes-the ZRC330F03TA is internally compensated and stable with capacitive loads up to at least 1 µF, as confirmed by Diodes' datasheet test conditions and typical transient response waveforms. No external compensation capacitor is required for standard crystal oscillator or ADC reference applications.

How does the 3% tolerance affect system-level accuracy in a 12-bit ADC design?

With a 3.3 V reference and ±3% tolerance, the absolute voltage error is ±99 mV, contributing ±123 LSBs of full-scale error in a 12-bit (4096-step) system. For high-accuracy measurements, this must be calibrated out or combined with gain/offset trimming; it is acceptable for non-calibrated industrial monitoring where ±0.5% system accuracy is sufficient.

Is ZRC330F03TA compatible with lead-free reflow profiles?

Yes-ZRC330F03TA uses a green (halogen-free) molding compound and meets JEDEC J-STD-020D moisture sensitivity level 1 (MSL-1), supporting standard Pb-free reflow profiles with peak temperatures up to 260°C and 60-second duration above 217°C.