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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

Diodes Incorporated ZRC330A01

Name: ZRC330A01
Brand: Diodes Incorporated
SKU: ZRC330A01
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC330A01

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZRC330A01.pdf

Description:: IC VREF SHUNT 1% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:3,346

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Product details

Overview

ZRC330A01 from Diodes Incorporated is a precision 3.3 V bandgap voltage reference IC with ±1% initial tolerance, 15 µA typical knee current, and 0.6 Ω typical slope resistance, designed for low-power analog signal conditioning in battery-powered instrumentation and data acquisition systems.

For engineers reviewing the ZRC330A01 datasheet, ZRC330A01 pinout, ZRC330A01 application, or ZRC330A01 equivalent, key selection criteria include reverse breakdown stability across −40°C to +85°C, capacitor-free operation, microsecond-scale transient response, and compatibility with capacitive loads up to 25 mA.

Technical Context

The ZRC330A01 implements a bandgap-based reverse-biased Zener topology optimized for low-knee-current operation, achieving stable 3.3 V reference output without external compensation. Its slope resistance of 0.6 Ω (typ) and dynamic impedance of 0.5–1.2 Ω (100 Hz, 1 mA) enable high PSRR and low noise in precision feedback paths.

It operates over 20 µA to 5 mA supply current, with thermal coefficient of 15–50 ppm/°C across full industrial temperature range. Transient recovery settles within <5 µs, supporting fast-switching power monitoring and ADC reference applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.30 V ±1% at 150 µA, ensuring accurate biasing for 12-bit+ ADCs and DACs
Knee Current	15 µA typical, enabling reliable start-up in ultra-low-power sleep modes
Slope Resistance	0.6 Ω typical, minimizing load-induced voltage shift under varying current draw
Tempco	15–50 ppm/°C, supporting stable reference performance across −40°C to +85°C
Noise (10 Hz–10 kHz)	43 µV_rms, suitable for high-resolution measurement front-ends
Capacitive Load Stability	Stable with any capacitive load-no external capacitor required for regulation

Pinout & Package

E-Line (TO-92 style), 3-pin package with pin 1 floating or connected to pin 3 per datasheet connection diagram. Pinout validated per official Diodes Incorporated ZRC330 series documentation.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode (floating or tied to Pin 3)	Provides optional internal connection path to cathode for enhanced thermal symmetry
Pin 2	Cathode (output)	Delivers regulated 3.3 V reference; connects to load or feedback node
Pin 3	Cathode / Anode tie point	Internally bonded to Pin 2; externally configurable to Pin 1 per layout requirements

Key Features

Feature	Design Value
No external capacitor required	Eliminates BOM cost and PCB area for stabilization, simplifying layout in space-constrained designs
Microsecond transient response	Reaches stable output in <5 µs, enabling use in fast-sampling data acquisition and burst-mode systems
Low knee current (15 µA typ)	Ensures reliable turn-on and regulation even under ultra-low quiescent current conditions
Stable with capacitive loads	Supports direct connection to ADC reference inputs, LDO feedback nodes, and crystal oscillator bias networks

Applications

Battery-Powered Instrumentation

Precision Data Acquisition

Use Scenario: Handheld multimeter with 16-bit SAR ADC requiring stable reference during intermittent wake cycles.

IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and analog front-end biasing.

Use Value: 15 µA knee current ensures regulation at standby current levels; ±1% tolerance maintains measurement accuracy across temperature.

Use Scenario: Industrial sensor node logging thermocouple and RTD signals via sigma-delta ADC.

IC Role / Device Role / Timing Role: Low-noise reference source for ADC reference input and PGA gain-setting network.

Use Value: 43 µV_rms wideband noise and 0.6 Ω slope resistance minimize code spread and offset drift in high-resolution conversions.

Portable Test Equipment

Crystal Oscillator Bias Network

Use Scenario: Portable oscilloscope probe calibration module operating from coin-cell battery.

IC Role / Device Role / Timing Role: Precision reference for DAC-controlled offset adjustment and gain calibration circuitry.

Use Value: Capacitor-free stability allows compact layout near sensitive analog sections; 5 µs settling supports automated self-calibration sequences.

Use Scenario: Low-power TCXO module requiring stable bias voltage for oscillator core transistors.

IC Role / Device Role / Timing Role: Regulated bias supply for varactor tuning and amplifier stages in oscillator loop.

Use Value: 3.3 V ±1% output and low tempco ensure frequency stability over temperature; rugged 200 mA surge rating handles startup transients.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV431AIDBZR	Adjustable shunt reference (1.24–6 V); 0.5% tolerance; higher 80 µA min cathode current	Requires external resistor divider; less suitable for fixed 3.3 V systems without trimming	Choose when adjustable output or tighter tolerance is needed, accepting higher minimum current
REF3033AIDBZR	3.3 V series reference; 0.2% tolerance; 50 µA typical IQ; requires 1 µF output capacitor	Higher accuracy but larger solution size and added capacitor BOM item	Prefer for metrology-grade accuracy where board space and capacitor count are acceptable

Compared with TLV431AIDBZR and REF3033AIDBZR, the ZRC330A01 offers lowest system-level component count (capacitor-free), smallest footprint (E-Line TO-92), and lowest knee current-making it optimal for ultra-compact, battery-limited applications where ±1% absolute accuracy suffices.

Availability

ZRC330A01 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable test equipment, and precision data acquisition systems requiring stable component supply and long-term lifecycle support.

Supply support for ZRC330A01 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 low-power, space-constrained applications demanding stable 3.3 V references without external compensation.

FAQ

Is the ZRC330A01 a shunt or series voltage reference?

The ZRC330A01 is a shunt voltage reference, operating in reverse breakdown mode like a precision Zener diode. It regulates by sinking current through its cathode terminal while maintaining a stable 3.3 V across its terminals, requiring an external current-limiting resistor in series with the supply.

Can the ZRC330A01 drive a 10 nF capacitive load without oscillation?

Yes-the ZRC330A01 is explicitly characterized as stable with any capacitive load and requires no external capacitor for regulation. Its internal design provides inherent phase margin, verified across 0–100 nF loads in the official datasheet's stability plots.

What is the maximum continuous current the ZRC330A01 can sink in E-Line package?

In the E-Line (TO-92) 3-pin package, the ZRC330A01 has a maximum continuous power dissipation of 500 mW at 25°C ambient. At 3.3 V output, this corresponds to ~151 mA continuous cathode current, though recommended operating current remains 20 µA–5 mA for optimal accuracy and stability.

Does the ZRC330A01 require derating above 25°C ambient temperature?

Yes-thermal derating applies per the datasheet's power dissipation curves. For the E-Line package, allowable power drops linearly from 500 mW at 25°C to zero at 125°C junction temperature, implying ~6.25 mW/°C derating slope. Designers must calculate junction temperature using θ_JA = 250°C/W (E-Line).

ZRC330A01 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: E-Line-3

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 3.3V

Voltage - Output (Max):: -

Current - Output:: 5 mA

Tolerance:: ±1%

Temperature Coefficient:: 50ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 43µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 20 µA

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: E-Line (TO-92 compatible)

ZRC330A01 FAQ

1.How can I place an order for ZRC330A01 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC330A01 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ZRC330A01 reliable?

The price and inventory of ZRC330A01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC330A01 is usually 5 days.

3.What payment methods are accepted for ZRC330A01?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC330A01 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC330A01?

ZRC330A01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC330A01 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ZRC330A01?

For technical support, including ZRC330A01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC330A01 requirements.

6.How does Aetrix verify that ZRC330A01 is sourced from the original manufacturer or authorized distributors?

All ZRC330A01 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZRC330A01 meets industry standards.

7.What is the process for return or replacement of ZRC330A01?

All ZRC330A01 units undergo pre-shipment inspection (PSI). If there is an issue with ZRC330A01, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ZRC330A01 part is unused and in its original packaging.

Return procedure for ZRC330A01:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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