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

Diodes Incorporated ZRC330A03

Name: ZRC330A03
Brand: Diodes Incorporated
SKU: ZRC330A03
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC330A03

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZRC330A03.pdf

Description:: IC VREF SHUNT 3% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:1,716

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Product details

Overview

ZRC330A03 from Diodes Incorporated is a precision 3.3 V bandgap voltage reference IC in E-Line (TO-92 style) package, with ±3% initial tolerance, 15 µA typical knee current, 0.6 Ω typical slope resistance, and stable operation from 20 µA to 5 mA - used as a low-power reference in portable instrumentation and crystal oscillator bias networks.

For engineers reviewing the ZRC330A03 datasheet, ZRC330A03 pinout, ZRC330A03 application, or ZRC330A03 equivalent, key selection factors include knee current (15 µA), temperature coefficient (15–50 ppm/°C), dynamic impedance (0.5–1.2 Ω), noise (43 µV_rms, 10 Hz–10 kHz), and capacitive-load stability without external compensation.

Technical Context

The ZRC330A03 implements a two-terminal shunt voltage reference topology using a bandgap-derived core, operating in reverse breakdown mode with no external capacitor required for stability. It maintains regulation across load currents from 15 µA to 25 mA and supports transient recovery in under 5 µs.

Its slope resistance of 0.6 Ω (typ.) and dynamic impedance of 0.5 Ω at 1 mA (100 Hz) enable tight output regulation under varying load conditions, while its 43 µV_rms wideband noise and 15–50 ppm/°C tempco support precision analog signal chains in battery-powered systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.30 V ±3% at IR = 150 µA - defines nominal reference level for ADC/DAC biasing and oscillator tuning
Knee Current	15 µA typical - minimum current to initiate stable regulation; enables ultra-low-power wake-up circuits
Slope Resistance	0.6 Ω typical - low incremental resistance ensures <1 mV output shift per 1 mA load change
Tempco	15–50 ppm/°C - determines worst-case drift over −40°C to +85°C industrial range
Noise (10 Hz–10 kHz)	43 µV_rms - limits resolution in high-gain sensor front-ends and precision DAC references
Dynamic Impedance	0.5 Ω at 1 mA, 100 Hz - ensures stability under AC load modulation in PLL and clock buffer circuits

Pinout & Package

E-Line (3-pin TO-92 style) package with pin 1 floating or connected to pin 3; device operates as a two-terminal shunt reference - anode and cathode only - with pin 2 serving as cathode output terminal.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode (floating or tied to Pin 3)	Internal connection optional; when tied, forms common-anode configuration for dual-reference designs
Pin 2	Cathode / Output	Reference voltage node (3.3 V); connects to load and feedback network
Pin 3	Anode (floating or tied to Pin 1)	Current input node; reverse-biased junction establishes regulated voltage at Pin 2

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCB layouts without stability-compensation components
Low knee current (15 µA)	Supports micropower sleep-mode operation in battery-backed real-time clocks and sensor nodes
Capacitive-load stability	Remains stable driving up to 10 nF loads - simplifies interface with ceramic decoupling and crystal oscillator tanks
Transient response <5 µs	Allows fast wake-up from low-power states without reference settling delay in data acquisition triggers

Applications

Battery-Powered Multimeters

Crystal Oscillator Bias Networks

Use Scenario: Handheld digital multimeter requiring stable 3.3 V reference for 16-bit ADC conversion across −10°C to +50°C ambient.

IC Role / Device Role / Timing Role: Two-terminal shunt reference providing excitation voltage for precision resistor-divider scaling and ADC internal reference path.

Use Value: 15 µA knee current extends battery life beyond 1 year; 43 µV_rms noise avoids digitization dither in DC voltage measurement mode.

Use Scenario: Low-jitter 10 MHz TCXO module where reference voltage sets oscillator core bias point and temperature compensation curve.

IC Role / Device Role / Timing Role: Stable DC bias source for varactor diode control and op-amp offset trimming in analog temperature compensation circuitry.

Use Value: 0.6 Ω slope resistance minimizes frequency pulling due to supply ripple; capacitive-load stability eliminates need for isolation RC networks.

Portable Data Loggers

Industrial Sensor Signal Conditioners

Use Scenario: Solar-charged environmental logger sampling thermistor and humidity sensors every 5 minutes, powered by Li-SOCl₂ cell.

IC Role / Device Role / Timing Role: Micropower voltage reference for ratiometric sensor excitation and ADC reference in intermittent-sampling architecture.

Use Value: Operation down to 20 µA enables full system sleep current <100 µA; 50 ppm/°C max tempco meets ±0.1°C temperature accuracy spec.

Use Scenario: 4–20 mA loop-powered pressure transmitter with HART modulation, requiring stable reference for DAC and current-sense amplifier.

IC Role / Device Role / Timing Role: Shunt reference supplying precise 3.3 V to sigma-delta ADC and microcontroller analog peripherals within tight power budget.

Use Value: 25 mA absolute max rating withstands transient surges on 24 V loop; SO8-compatible footprint allows drop-in upgrade from legacy references.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431AIDBZR	Adjustable (2.5 V base), 0.5% initial tol, 0.2 Ω slope resistance, requires external resistors for 3.3 V setting	Higher precision but adds two 1% resistors and layout area; not pin-compatible	Preferred when tighter tolerance or programmability outweighs board space and BOM count constraints
LM4040C33IDBZR	Fixed 3.3 V, ±0.5% tol, 0.5 Ω slope resistance, 65 ppm/°C tempco, requires 1 nF bypass cap for stability	Lower noise (20 µV_rms) but higher tempco and mandatory capacitor limit use in ultra-compact layouts	Chosen for metrology-grade accuracy where capacitor placement is feasible and tempco is compensated digitally

Compared with TLVH431AIDBZR and LM4040C33IDBZR, the ZRC330A03 offers lowest knee current and zero-capacitor operation - critical for space- and energy-constrained designs - while trading off absolute accuracy and tempco for simplicity and ruggedness up to 200 mA surge.

Availability

ZRC330A03 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable test equipment, and crystal oscillator bias networks requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZRC330A03 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 where shunt topology, micropower operation, and capacitor-free stability are design priorities.

FAQ

What is the minimum operating current for reliable regulation of ZRC330A03?

The ZRC330A03 achieves stable regulation at a typical knee current of 15 µA, with guaranteed operation starting at 20 µA per datasheet limits. Below 15 µA, output voltage drops nonlinearly; design margin should maintain ≥20 µA under all operating conditions including temperature extremes and aging.

Can ZRC330A03 drive a 10 nF capacitive load without oscillation?

Yes - the ZRC330A03 is explicitly characterized for capacitive-load stability up to 10 nF without external compensation, as confirmed in the "Capacitive-Load Stability" section of the datasheet and validated in typical application circuits driving crystal oscillator tanks and ADC sample-hold capacitors.

How does the 0.6 Ω slope resistance affect output voltage accuracy under load variation?

A 0.6 Ω slope resistance means a 0.6 mV change in output voltage per 1 mA change in cathode current. For example, a 2 mA load step causes ≤1.2 mV shift - well within ±10 mV total error budget for most 12-bit systems, eliminating need for post-regulation buffering in many cases.

Is ZRC330A03 suitable for use in automotive under-hood environments?

No - the ZRC330A03 is rated for −40°C to +85°C industrial temperature range and lacks AEC-Q100 qualification, extended tempco characterization, or automotive-grade screening. It is appropriate for commercial and industrial equipment but not for under-hood automotive applications requiring −40°C to +125°C operation and PPAP compliance.

ZRC330A03 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:: ±3%

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)

ZRC330A03 FAQ

1.How can I place an order for ZRC330A03 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC330A03 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 ZRC330A03 reliable?

The price and inventory of ZRC330A03 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC330A03 is usually 5 days.

3.What payment methods are accepted for ZRC330A03?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC330A03 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC330A03?

ZRC330A03 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC330A03 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 ZRC330A03?

For technical support, including ZRC330A03 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC330A03 requirements.

6.How does Aetrix verify that ZRC330A03 is sourced from the original manufacturer or authorized distributors?

All ZRC330A03 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 ZRC330A03 meets industry standards.

7.What is the process for return or replacement of ZRC330A03?

All ZRC330A03 units undergo pre-shipment inspection (PSI). If there is an issue with ZRC330A03, 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 ZRC330A03 part is unused and in its original packaging.

Return procedure for ZRC330A03:

1.Submit a request within 90 days.

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

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