Diodes Incorporated ZRC330N801TA

Overview

ZRC330N801TA from Diodes Incorporated is a precision 3.3 V bandgap voltage reference IC in SO8 package, with ±1% initial tolerance, 15 µA typical knee current, 0.6 Ω typical slope resistance, and stable operation from 20 µA to 5 mA-used in crystal oscillator biasing, portable instrumentation, and low-power data acquisition systems.

For engineers reviewing the ZRC330N801TA datasheet, ZRC330N801TA pinout, ZRC330N801TA application, or ZRC330N801TA equivalent, key selection criteria include reverse breakdown voltage stability (3.30 V @ 150 µA), temperature coefficient (15 ppm/°C), capacitive load immunity, transient response (<5 µs settling), and SO8 thermal performance (625 mW at 25°C).

Technical Context

The ZRC330N801TA implements a two-terminal bandgap-based shunt reference architecture, operating as a precision reverse-biased Zener-like device with inherent low dynamic impedance (0.5–1.2 Ω) and wideband noise of 43 µV_rms (10 Hz–10 kHz). It requires no external stabilization capacitor and maintains regulation across capacitive loads up to 10 nF.

Its rugged 20 V process enables transient survival up to 200 mA, while its 15–25 mA absolute maximum reverse current rating supports robust overcurrent handling. The device achieves stable output within microseconds due to low internal capacitance and optimized junction design.

Key Specifications

Pinout & Package

SO8 package (suffix N8), surface-mount, 8-pin small outline integrated circuit with exposed pad for thermal enhancement. Pin 1 = Anode (input), Pin 2 = Cathode (output/reference node), Pins 3–8 = NC or thermal pad tie (per Diodes Inc. drawing ZRC330-N8).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL431ACDR and REF3033AIDBZR, the ZRC330N801TA offers lowest operating current, smallest footprint, and highest transient immunity-but lacks adjustability and has higher initial tolerance than REF3033AIDBZR.

Availability

ZRC330N801TA is available at Aetrix Electronics and suitable for crystal oscillator biasing, portable instrumentation, and precision data acquisition systems requiring stable component supply with guaranteed long-term continuity.

Supply support for ZRC330N801TA 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 space-constrained, battery-operated systems demanding micropower operation, rapid turn-on, and robust transient tolerance.

FAQ

What is the minimum operating current for stable regulation?

The ZRC330N801TA achieves stable regulation at a minimum operating current of 15 µA (typical knee current), with guaranteed performance starting at 20 µA across the full −40°C to +85°C temperature range. Below 20 µA, output voltage may deviate beyond ±1% tolerance, especially at temperature extremes.

Can it drive a 10 nF capacitive load without oscillation?

Yes-the ZRC330N801TA is explicitly characterized as capacitive-load stable up to 10 nF without external compensation. This is confirmed by transient response testing and stability plots in the official datasheet (Issue 2, Figure 1-43), making it suitable for direct connection to ADC input capacitors and crystal oscillator tanks.

Is the SO8 package thermally enhanced?

Yes-the SO8 package (suffix N8) features an exposed thermal pad on the underside, designated as Pin 8. When soldered to a ≥100 mm² copper pour tied to internal ground planes, it enables the full 625 mW power dissipation rating at 25°C ambient, critical for sustained 5 mA operation in enclosed enclosures.

How does its noise performance compare to series references?

At 43 µV_rms (10 Hz–10 kHz), the ZRC330N801TA's noise is comparable to mid-tier series references like REF3033 (40 µV_rms). Its shunt topology avoids PSRR limitations but introduces current-source noise coupling; careful PCB layout (short traces, local decoupling) is essential to maintain this level in mixed-signal systems.