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

Diodes Incorporated ZRC500A02

Name: ZRC500A02
Brand: Diodes Incorporated
SKU: ZRC500A02
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC500A02

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZRC500A02.pdf

Description:: IC VREF SHUNT 2% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:3,678

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Product details

Overview

ZRC500A02 from Diodes Incorporated is a precision 5.0 V bandgap voltage reference with ±2% initial tolerance, 30 ppm/°C typical temperature coefficient, and 0.4 Ω typical slope resistance. It operates from 25 µA to 5 mA, requires no external capacitor, and achieves stable output in <10 µs-ideal for low-power instrumentation and battery-powered metering systems.

For engineers reviewing the ZRC500A02 datasheet, ZRC500A02 pinout, ZRC500A02 application, or ZRC500A02 equivalent, key selection criteria include knee current (19 µA typ), load stability without compensation, transient response under capacitive loads, and industrial temperature range (–40°C to +85°C) compliance.

Technical Context

The ZRC500A02 implements a two-terminal shunt reference topology using a bandgap-derived core, delivering fixed 5.0 V reverse breakdown with inherent thermal compensation. Its low 19 µA typical minimum operating current and 0.4 Ω dynamic impedance enable stable regulation even at microamp-level bias currents.

It exhibits monotonic reverse characteristics across –40°C to +85°C, with voltage drift bounded by 30 ppm/°C (typ) and 90 ppm/°C (max), and maintains regulation integrity up to 200 mA transient surge current due to rugged 20 V process design.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V ±2% at 150 µA - ensures accurate ADC/DAC biasing within tight system voltage margins
Temp Coefficient	30 ppm/°C typ - limits full-range drift to ±15 mV over –40°C to +85°C
Min Operating Current	19 µA typ - enables operation in ultra-low-power sleep modes
Slope Resistance	0.4 Ω typ - minimizes load-induced voltage shift under varying current draw
Transient Response	Stable in <10 µs - supports fast-switching power monitoring and sampling circuits
Capacitive Load Stability	Stable with any capacitive load - eliminates need for external compensation networks
Max Surge Current	200 mA - withstands ESD and inrush transients without degradation

Pinout & Package

E-Line (TO-92) 3-pin package (suffix R), with Pin 3 floating or connected to Pin 1 per datasheet revision. Device functions as a two-terminal shunt reference; only Anode and Cathode are active terminals.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference return path	Connected to system ground or low-impedance return; sets cathode voltage relative to this node
Cathode (Pin 2)	5.0 V output terminal	Delivers regulated 5.0 V when biased above breakdown; sinks current into Anode
Pin 3	No-connect / optional tie to Pin 1	Internally unconnected; may be bonded to Pin 1 for mechanical robustness or left floating

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCB layouts without stability-compensation components
Low knee current (19 µA typ)	Supports operation in energy-harvesting and coin-cell-powered systems where supply current is severely limited
Stable with capacitive loads	Allows direct connection to ADC input caps, LDO bypasses, or digital IC decoupling without oscillation risk
Fast transient recovery (<10 µs)	Meets timing-critical requirements in automated test equipment and high-speed data acquisition
Rugged 20 V process	Provides immunity to line transients and ESD events common in industrial field instrumentation

Applications

Battery-Powered Portable Meters

Industrial Process Instrumentation

Use Scenario: Handheld multimeters and clamp meters powered by single AA/AAA cells with intermittent high-current LCD backlighting.

IC Role / Device Role / Timing Role: Shunt voltage reference for 16-bit sigma-delta ADC front-end, providing stable 5.0 V reference during battery voltage sag.

Use Value: Maintains ±0.01% measurement accuracy across 0.9–1.6 V battery range due to low knee current and load insensitivity.

Use Scenario: 4–20 mA loop-powered pressure transmitters operating in oil & gas field environments.

IC Role / Device Role / Timing Role: Precision 5.0 V reference for DAC-based current loop control circuitry, exposed to –40°C to +85°C ambient swings.

Use Value: Delivers ≤±0.5 mV total error over temperature via 30 ppm/°C TC and 0.4 Ω slope resistance.

Portable Medical Diagnostic Devices

Energy Meter Reference Subsystem

Use Scenario: Battery-operated pulse oximeters requiring FDA-grade analog signal chain stability.

IC Role / Device Role / Timing Role: Reference source for photodiode transimpedance amplifier and ADC, active during 100 ms LED pulse bursts.

Use Value: Recovers to regulation in <10 µs after each pulse, eliminating settling delay in real-time SpO₂ calculation.

Use Scenario: DIN-rail mounted kWh meters with anti-tampering features and 10-year field life.

IC Role / Device Role / Timing Role: Primary voltage reference for metrology-grade polyphase energy measurement ASICs.

Use Value: Guarantees long-term stability with <100 µV rms wideband noise and no aging-related drift mechanisms.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDR	Adjustable output (2.5 V), higher min current (1 mA), 20 ppm/°C TC	Requires external resistor divider; less suitable for fixed 5.0 V, ultra-low-IQ systems	Choose when programmability or tighter TC outweighs IQ penalty
LM4040C50IDBZR	Fixed 5.0 V, 0.5% tolerance, 100 µA min current, 75 ppm/°C TC	Higher knee current limits use in sub-100 µA standby designs	Prefer for cost-sensitive, non-battery applications where 0.5% tolerance suffices

Compared with TL431ACDR and LM4040C50IDBZR, the ZRC500A02 uniquely balances ±2% tolerance, 19 µA knee current, and capacitor-free stability-making it optimal for compact, battery-constrained systems needing fixed 5.0 V without trimming or layout overhead.

Availability

ZRC500A02 is available at Aetrix Electronics and suitable for battery-powered portable meters, industrial process instrumentation, and energy meter reference subsystems requiring stable component supply across extended product lifecycles.

Supply support for ZRC500A02 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for industrial, computing, consumer, and communications markets.

The ZRC500 series belongs to Diodes' precision voltage reference product line, engineered specifically for space-constrained, low-power applications demanding high stability without external compensation components.

FAQ

Is the ZRC500A02 a two-terminal or three-terminal device?

The ZRC500A02 is functionally a two-terminal shunt voltage reference (Anode and Cathode). In its E-Line (TO-92) 3-pin package, Pin 3 is internally unconnected and may be left floating or tied to Pin 1 for mechanical reinforcement-no electrical role is assigned to it.

Can the ZRC500A02 drive a 1 µF ceramic capacitor directly?

Yes. The ZRC500A02 is explicitly characterized as stable with any capacitive load, including 1 µF ceramic capacitors, without requiring series resistance or external compensation-confirmed in the Transient Response and Typical Characteristics sections of the official datasheet.

What is the maximum continuous current the ZRC500A02 can sink?

The ZRC500A02 is recommended for continuous operation between 25 µA and 5 mA. While it withstands transient surges up to 200 mA, sustained current beyond 5 mA exceeds its specified operating range and risks thermal overstress, especially in SOT23 or TO-92 packages.

How does the ZRC500A02 compare to ZRC500A01 and ZRC500A03?

The ZRC500A02 differs solely in initial tolerance: ±2% (vs. ±1% for A01, ±3% for A03). All share identical temperature coefficient, slope resistance, knee current, package options, and transient performance-making them drop-in replacements where tolerance budget allows relaxation or tightening.

ZRC500A02 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):: 5V

Voltage - Output (Max):: -

Current - Output:: 5 mA

Tolerance:: ±2%

Temperature Coefficient:: 90ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 105µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 25 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

ZRC500A02 FAQ

1.How can I place an order for ZRC500A02 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC500A02 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 ZRC500A02 reliable?

The price and inventory of ZRC500A02 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC500A02 is usually 5 days.

3.What payment methods are accepted for ZRC500A02?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC500A02 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC500A02?

ZRC500A02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC500A02 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 ZRC500A02?

For technical support, including ZRC500A02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC500A02 requirements.

6.How does Aetrix verify that ZRC500A02 is sourced from the original manufacturer or authorized distributors?

All ZRC500A02 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 ZRC500A02 meets industry standards.

7.What is the process for return or replacement of ZRC500A02?

All ZRC500A02 units undergo pre-shipment inspection (PSI). If there is an issue with ZRC500A02, 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 ZRC500A02 part is unused and in its original packaging.

Return procedure for ZRC500A02:

1.Submit a request within 90 days.

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

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