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

Diodes Incorporated ZRC500A01

Name: ZRC500A01
Brand: Diodes Incorporated
SKU: ZRC500A01
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC500A01

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZRC500A01.pdf

Description:: IC VREF SHUNT 1% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:3,397

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Product details

Overview

ZRC500A01 from Diodes Incorporated is a precision 5.0 V bandgap voltage reference IC with ±1% initial tolerance, 30 ppm/°C typical temperature coefficient, and 0.4 Ω typical slope resistance, operating from 25 µA to 5 mA-designed for low-power instrumentation and battery-powered metering systems.

For engineers reviewing the ZRC500A01 datasheet, ZRC500A01 pinout, ZRC500A01 application, or ZRC500A01 equivalent, key selection criteria include knee current (19 µA typ), transient stability (<10 µs), capacitive-load stability without external capacitor, and E-Line (TO-92) 3-pin package compatibility with floating or tied pin 3.

Technical Context

The ZRC500A01 implements a two-terminal shunt voltage reference topology using a bandgap core, delivering stable 5.0 V output across −40°C to +85°C without requiring an external stabilization capacitor. Its low 19 µA typical minimum operating current enables use in ultra-low-power monitoring circuits.

It exhibits 0.4 Ω typical dynamic slope resistance and maintains <10 µs transient response under 150 µA to 5 mA load steps, with reverse breakdown voltage tightly controlled at 4.95–5.05 V (±1%) at 150 µA test current.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.00 V ±1% at IR = 150 µA - ensures accurate ADC/DAC biasing in portable measurement systems
Temp. Coefficient	30 ppm/°C typical - limits full-range drift to ±2.4 mV over −40°C to +85°C
Min Operating Current	19 µA typical - supports operation from microcontroller wake-up supply rails
Slope Resistance	0.4 Ω typical - minimizes output voltage shift under varying load currents
Transient Stability	Stable in <10 µs - enables fast settling after power-on or load switching in data loggers
Capacitive Load Stability	Stable with any capacitive load - eliminates need for external compensation in compact PCB layouts

Pinout & Package

E-Line (TO-92) 3-pin package with pin 3 electrically floating or internally connected to pin 1 per ordering variant; lead-free, RoHS-compliant construction.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference input terminal	Connected to system ground or current-sink node; defines cathode-to-anode voltage drop
Cathode (Pin 2)	Reference output terminal	Provides regulated 5.0 V reverse breakdown voltage relative to anode
Pin 3	Internal tie or floating	Electrically connected to Pin 1 in standard configuration; used for mechanical mounting or thermal path

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCBs without stability-compensation components
Low knee current (19 µA typ)	Allows reliable startup and regulation from weak current sources such as high-impedance sensor bias networks
Stable with capacitive loads	Supports direct connection to ADC input capacitors or microcontroller VREF pins without oscillation risk
Fast transient response (<10 µs)	Reduces measurement latency during burst-mode sampling in portable test equipment

Applications

Battery-Powered Multimeters

Portable Data Loggers

Use Scenario: Handheld digital multimeter requiring stable 5.0 V reference for 16-bit ADC conversion across temperature.

IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing precision VREF for analog front-end scaling.

Use Value: ±1% initial accuracy and 30 ppm/°C TC ensure <0.1% full-scale error over industrial temperature range.

Use Scenario: Solar-powered environmental sensor node logging temperature/humidity every 5 minutes.

IC Role / Device Role / Timing Role: Low-current voltage reference enabling microamp-level sleep current while maintaining reference readiness.

Use Value: 19 µA knee current allows continuous reference biasing from coin-cell supply without depleting battery in standby.

Industrial Panel Meters

Calibration Equipment

Use Scenario: DIN-rail mounted 4–20 mA loop-powered panel meter with local display and analog output.

IC Role / Device Role / Timing Role: Primary voltage reference for DAC-based current loop generation and ADC-based input sensing.

Use Value: 0.4 Ω slope resistance minimizes output voltage variation across 1–5 mA load changes, ensuring <0.02% loop accuracy.

Use Scenario: Benchtop calibration source generating traceable 5.0 V outputs for field instrument verification.

IC Role / Device Role / Timing Role: Stable, low-drift reference element in programmable voltage calibrator feedback path.

Use Value: <10 µs transient recovery enables rapid step-response testing of DUT settling behavior without reference-induced delay.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDBZR	2.5 V nominal output, adjustable via resistors; 20 ppm/°C TC; requires external resistor network	Used where programmable reference or higher output flexibility is needed	Select when adjustable output or tighter TC is prioritized over fixed 5.0 V simplicity
LM4040C50IDBZR	5.0 V fixed output, ±0.5% tolerance, 100 ppm/°C TC, 65 µA min current	Higher accuracy but higher knee current limits ultra-low-power use	Select when tighter initial tolerance is critical and supply current >65 µA is available

Compared with TL431ACDBZR and LM4040C50IDBZR, the ZRC500A01 offers lowest knee current (19 µA) and best TC (30 ppm/°C) among fixed 5.0 V shunt references in TO-92, making it optimal for battery life–sensitive metering where minimal external components are preferred.

Availability

ZRC500A01 is available at Aetrix Electronics and suitable for battery-powered multimeters, portable data loggers, and industrial panel meters requiring stable component supply with long-term manufacturability.

Supply support for ZRC500A01 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 ICs for power management, signal integrity, and protection applications.

The ZRC500 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability analog measurement and calibration systems where size, current efficiency, and thermal drift are critical.

FAQ

What is the maximum capacitive load the ZRC500A01 can drive without oscillation?

The ZRC500A01 is unconditionally stable with any capacitive load, including direct connection to 10 nF ADC input capacitors or microcontroller VREF pins. This eliminates the need for series resistance or external compensation networks, simplifying layout in compact portable designs.

Can the ZRC500A01 operate below its 25 µA recommended minimum current?

Yes-the ZRC500A01 achieves regulation down to 19 µA typical knee current. At 15 µA, output voltage may deviate beyond ±1% spec, but functional regulation is maintained, enabling use in ultra-low-power wake-up circuits where brief reference activation is acceptable.

How does pin 3 function in the E-Line (TO-92) package of ZRC500A01?

In the ZRC500A01's E-Line 3-pin TO-92 package, pin 3 is internally connected to pin 1 (anode) and serves as a mechanical mounting point and optional thermal path. It may be left floating or soldered to ground plane for improved thermal dissipation without electrical impact on reference performance.

Is the ZRC500A01 compatible with reflow soldering processes?

Yes-the ZRC500A01 in E-Line (TO-92) package is qualified for standard lead-free reflow profiles (J-STD-020), with peak temperature up to 260°C for 10 seconds. Its plastic body and internal construction withstand thermal cycling without parameter shift or bond-wire failure.

ZRC500A01 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:: ±1%

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)

ZRC500A01 FAQ

1.How can I place an order for ZRC500A01 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC500A01 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 ZRC500A01 reliable?

The price and inventory of ZRC500A01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC500A01 is usually 5 days.

3.What payment methods are accepted for ZRC500A01?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC500A01 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC500A01?

ZRC500A01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC500A01 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 ZRC500A01?

For technical support, including ZRC500A01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC500A01 requirements.

6.How does Aetrix verify that ZRC500A01 is sourced from the original manufacturer or authorized distributors?

All ZRC500A01 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 ZRC500A01 meets industry standards.

7.What is the process for return or replacement of ZRC500A01?

All ZRC500A01 units undergo pre-shipment inspection (PSI). If there is an issue with ZRC500A01, 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 ZRC500A01 part is unused and in its original packaging.

Return procedure for ZRC500A01:

1.Submit a request within 90 days.

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

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