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

Diodes Incorporated ZRC500A01STZ

Name: ZRC500A01STZ
Brand: Diodes Incorporated
SKU: ZRC500A01STZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC500A01STZ

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: ZRC500A01STZ.pdf

Description:: IC VREF SHUNT 1% TO92

Quantity:: RFQ Add To RFQ list

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Inventory:2,663

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Product details

Overview

ZRC500A01STZ 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. It operates from 25 µA to 5 mA, requires no external stabilization capacitor, and achieves stable output in <10 µs-ideal for low-power portable instrumentation and battery-powered metering systems.

For engineers reviewing the ZRC500A01STZ datasheet, ZRC500A01STZ pinout, ZRC500A01STZ application, or ZRC500A01STZ equivalent, key selection criteria include knee current (19 µA typ), load stability without capacitors, transient response time (<10 µs), TC performance across –40°C to +85°C, and SOT23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The ZRC500A01STZ implements a two-terminal shunt reference topology with internal bandgap core, delivering regulated 5.0 V reverse breakdown voltage at 150 µA test current. Its low 0.4 Ω dynamic impedance and 105 µV_rms wideband noise (10 Hz–10 kHz) support high-accuracy analog measurement front-ends.

It maintains regulation over 25 µA–5 mA operating current and withstands transient surges up to 200 mA due to rugged 20 V process design. Temperature drift is characterized across –40°C to +85°C with guaranteed 90 ppm/°C max TC.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.00 V ±1% at 150 µA - ensures accurate ADC/DAC biasing in precision data acquisition
Temp Coefficient	30 ppm/°C typ, 90 ppm/°C max - enables stable reference over industrial temperature range
Knee Current	19 µA typ - allows operation in ultra-low-power sleep modes of battery devices
Slope Resistance	0.4 Ω typ - minimizes output voltage shift under varying load currents
Transient Response	Stable in <10 µs - supports fast wake-up and sampling cycles in portable test gear
Noise (10Hz–10kHz)	105 µV_rms - preserves signal integrity in high-resolution 16-bit+ measurement systems
Package	SOT23-3 - surface-mount footprint compatible with automated assembly and compact PCBs

Pinout & Package

SOT23-3 package: small-outline transistor outline with gull-wing leads, 1.3 mm × 2.9 mm body, 0.95 mm height, JEDEC MO-178 compliant.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Current sink input	Connects to supply rail via series resistor; sets operating current into device
Cathode (Pin 2)	Reference output	Provides stable 5.0 V output referenced to Anode; used as precision bias node
NC / Floating (Pin 3)	No connection	Internally unconnected; must remain floating per datasheet - not tied to Anode or Cathode

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-limited designs without stability-compromising layout constraints
Low knee current (19 µA typ)	Permits reliable regulation even when driven by high-impedance sources or micro-power bias networks
Stable with capacitive loads	Supports direct buffering with op-amps or driving ADC reference inputs without oscillation risk
Rugged 200 mA surge rating	Withstands ESD transients and inrush events in field-deployed instrumentation without derating
Industrial temp range (–40°C to +85°C)	Validated performance across full operating envelope - no derating needed for outdoor or factory-floor use

Applications

Battery-Powered Multimeters

Portable Data Loggers

Use Scenario: Handheld digital multimeter requiring stable 5.0 V reference for 200 kSps SAR ADC and LCD bias generation.

IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing primary system reference voltage.

Use Value: ±1% initial accuracy and 30 ppm/°C TC ensure calibrated measurement accuracy across battery discharge cycle and ambient temperature shifts.

Use Scenario: Solar-powered environmental sensor node logging temperature/humidity with 16-bit sigma-delta ADC.

IC Role / Device Role / Timing Role: Low-current precision reference enabling sub-10 µA sleep-mode operation while maintaining reference readiness.

Use Value: 19 µA knee current and <10 µs wake-up allow rapid transition from deep sleep to accurate measurement without warm-up delay.

Industrial Panel Meters

Calibration Equipment

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

IC Role / Device Role / Timing Role: Primary voltage reference for isolated analog front-end and DAC-based output scaling.

Use Value: 0.4 Ω slope resistance and 105 µV_rms noise preserve 0.1% full-scale accuracy despite supply ripple and load variations.

Use Scenario: Benchtop calibration source generating traceable 5.0 V outputs for lab-grade DMM verification.

IC Role / Device Role / Timing Role: Stable shunt reference used in feedback path of precision op-amp reference buffer.

Use Value: Guaranteed 90 ppm/°C max TC and no external capacitor requirement simplify metrology-grade layout and long-term drift management.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDBVR	Adjustable 2.5 V reference (requires external resistors); 20 ppm/°C TC; 0.22 Ω typical impedance	Requires external feedback network; better for programmable references but adds component count and layout sensitivity	Choose when adjustable output or tighter TC is required, and board area permits resistor network
LM4040C50IDBZR	Fixed 5.0 V; 50 ppm/°C max TC; 15 µA min cathode current; SC70-3 package	Higher TC and lower surge rating (50 mA); smaller SC70 footprint but less rugged for industrial transients	Choose for ultra-compact designs where 50 ppm/°C TC is acceptable and surge immunity is secondary

Compared with TL431ACDBVR and LM4040C50IDBZR, ZRC500A01STZ offers superior surge robustness (200 mA), simpler fixed-voltage implementation, and lower knee current than LM4040 - making it optimal for rugged, low-power, fixed-reference applications where reliability and minimal BOM count are critical.

Availability

ZRC500A01STZ is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable test equipment, and industrial metering systems requiring stable component supply with consistent parametric performance across production batches.

Supply support for ZRC500A01STZ 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.

ZRC500A01STZ belongs to the ZRC series of precision shunt voltage references, designed specifically for low-power, high-stability applications in portable and battery-operated measurement equipment.

FAQ

What is the minimum operating current for stable regulation?

The ZRC500A01STZ achieves stable regulation at a typical knee current of 19 µA, with guaranteed operation starting at 25 µA per datasheet specifications. Below 25 µA, output voltage may deviate beyond ±1% tolerance, especially at temperature extremes. For reliable low-current operation, design with ≥25 µA anode current under all conditions.

Can ZRC500A01STZ drive capacitive loads directly?

Yes - the ZRC500A01STZ is internally compensated and stable with capacitive loads up to at least 1 µF, as confirmed by manufacturer characterization. No external capacitor is required for stability, and it remains immune to oscillation when driving ADC reference inputs, op-amp buffers, or bypass caps typical in portable instrumentation.

Is Pin 3 (SOT23-3) electrically connected internally?

No - Pin 3 in the SOT23-3 package (suffix "STZ") is internally unconnected (NC) and must remain floating. It is not tied to Anode or Cathode. Connecting Pin 3 to any potential violates the datasheet specification and may degrade TC performance or cause unexpected regulation behavior.

How does ZRC500A01STZ handle transient overcurrent events?

The ZRC500A01STZ uses a 20 V process technology and is rated to withstand transient currents up to 200 mA without damage or parameter shift. This ruggedness is validated per absolute maximum ratings and enables reliable operation in environments with ESD, inductive kickback, or power-rail disturbances common in industrial field equipment.

ZRC500A01STZ Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Series:: -

Packaging:: Tape & Box (TB)

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:: TO-92

ZRC500A01STZ FAQ

1.How can I place an order for ZRC500A01STZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC500A01STZ 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 ZRC500A01STZ reliable?

The price and inventory of ZRC500A01STZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC500A01STZ is usually 5 days.

3.What payment methods are accepted for ZRC500A01STZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC500A01STZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC500A01STZ?

ZRC500A01STZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC500A01STZ 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 ZRC500A01STZ?

For technical support, including ZRC500A01STZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC500A01STZ requirements.

6.How does Aetrix verify that ZRC500A01STZ is sourced from the original manufacturer or authorized distributors?

All ZRC500A01STZ 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 ZRC500A01STZ meets industry standards.

7.What is the process for return or replacement of ZRC500A01STZ?

All ZRC500A01STZ units undergo pre-shipment inspection (PSI). If there is an issue with ZRC500A01STZ, 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 ZRC500A01STZ part is unused and in its original packaging.

Return procedure for ZRC500A01STZ:

1.Submit a request within 90 days.

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

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