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

Diodes Incorporated ZRC500A02STZ

Name: ZRC500A02STZ
Brand: Diodes Incorporated
SKU: ZRC500A02STZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC500A02STZ

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZRC500A02STZ.pdf

Description:: IC VREF SHUNT 2% TO92

Quantity:: RFQ Add To RFQ list

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Inventory:1,282

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Product details

Overview

ZRC500A02STZ from Diodes Incorporated is a precision 5.0 V bandgap voltage reference IC 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 stabilization capacitor, and achieves stable output in <10 µs-ideal for low-power portable instrumentation and battery-powered metering systems.

For engineers reviewing the ZRC500A02STZ datasheet, ZRC500A02STZ pinout, ZRC500A02STZ application, or ZRC500A02STZ equivalent, key selection criteria include knee current (19 µA typ), load stability without external capacitance, transient response under 10 µs, TC performance across –40°C to +85°C, and SOT23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The ZRC500A02STZ implements a two-terminal shunt-reference topology with internal bandgap core, delivering regulated 5.0 V reverse breakdown voltage across its anode–cathode terminals. Its low 19 µA typical minimum operating current enables operation in ultra-low-power sensor front-ends and energy-harvesting circuits.

It exhibits inherent capacitive-load stability up to 10 nF and maintains regulation under transient currents up to 200 mA due to rugged 20 V process design. Slope resistance of 0.4 Ω (typ) ensures tight line regulation over 25 µA–5 mA operating range, with wideband noise of 105 µV_rms (10 Hz–10 kHz).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V ±2% at 150 µA - ensures accurate ADC/DAC biasing in 5 V systems
Temp Coefficient	30 ppm/°C typ - supports <±10 mV drift over –40°C to +85°C
Min Operating Current	19 µA typ - enables use in microamp-level standby circuits
Slope Resistance	0.4 Ω typ - delivers <2 mV output change per 5 mA load shift
Transient Response	<10 µs settling - suitable for fast-switching power monitoring and sampling triggers
Capacitive Load Stability	Stable with 0–10 nF - eliminates need for external compensation capacitor
Wideband Noise	105 µV_rms (10 Hz–10 kHz) - meets precision analog signal chain requirements

Pinout & Package

Package: SOT23-3 (suffix "F"), 3-pin surface-mount plastic package with standard pinout orientation.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference current sink input	Connects to system ground or current source; sets operating point via external resistor
Cathode (Pin 2)	5.0 V regulated output	Provides stable 5.0 V reference node; decoupling optional due to intrinsic stability
No Connect (Pin 3)	Unused terminal	Internally floating or tied to Pin 1 per package variant; must be left unconnected per ZRC500F series datasheet

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference design in space-limited layouts
19 µA typical knee current	Supports operation in sub-50 µA supply rails common in IoT sensor nodes
30 ppm/°C tempco	Meets industrial-grade accuracy without calibration over full temperature range
<10 µs transient settling	Allows direct integration into high-speed data acquisition trigger paths
Stable with 10 nF capacitive load	Permits local bypassing without risk of oscillation or overshoot

Applications

Battery-Powered Portable Instruments

Industrial Data Acquisition Front-Ends

Use Scenario: Handheld multimeter with auto-ranging ADC requiring stable 5 V reference during battery voltage sag.

IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing excitation and scaling reference for 16-bit SAR ADC.

Use Value: Maintains ±2 mV output accuracy from 3.0 V to 4.2 V battery input via simple resistor bias, eliminating LDO dependency.

Use Scenario: PLC analog input module measuring 4–20 mA loop signals with cold-junction compensation.

IC Role / Device Role / Timing Role: Precision reference for 24-bit delta-sigma ADC and thermocouple amplifier gain-setting network.

Use Value: 30 ppm/°C TC ensures <±0.5 °C measurement error over –25°C to +70°C ambient without software correction.

Energy-Metering IC Biasing

Low-Power Sensor Signal Conditioning

Use Scenario: Residential smart electricity meter using metrology SoC with integrated ADC requiring clean 5 V reference.

IC Role / Device Role / Timing Role: Primary voltage reference for active energy calculation engine and real-time clock oscillator bias.

Use Value: 105 µV_rms noise floor prevents degradation of 0.1% kWh accuracy specification under EMI-rich distribution panel environments.

Use Scenario: Wireless temperature node with MEMS sensor and ultra-low-power MCU in deep-sleep mode.

IC Role / Device Role / Timing Role: Wake-up-triggered reference source enabling ADC conversion only when needed.

Use Value: 19 µA knee current allows continuous reference bias from coin-cell battery for >5 years at 1-sample-per-minute duty cycle.

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 two external resistors); 50 ppm/°C max TC; 0.22 Ω typical slope resistance	Requires resistor network for 5 V setup; higher TC limits high-temp accuracy	Preferred where adjustable output or tighter slope resistance is critical, but adds layout area and BOM count
LM4040C50IDBZR	Fixed 5.0 V shunt reference; 100 ppm/°C max TC; 0.5 Ω typical slope resistance; 70 µA min operating current	Higher knee current reduces suitability for sub-100 µA systems; wider TC increases calibration burden	Valid for cost-sensitive designs where 100 ppm/°C drift is acceptable and board space permits larger SOT23 footprint

Compared with TL431ACDBVR and LM4040C50IDBZR, the ZRC500A02STZ offers lowest knee current (19 µA) and best TC (30 ppm/°C typ) in fixed 5 V SOT23 format-making it optimal for battery life–critical, high-accuracy analog sensing where minimal external components are mandatory.

Availability

ZRC500A02STZ is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial data acquisition modules, and energy-metering systems requiring stable component supply with guaranteed long-term continuity.

Supply support for ZRC500A02STZ 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, headquartered in Plano, Texas, serving industrial, computing, consumer, and communications markets since 1959.

The ZRC500 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability shunt references in portable and battery-operated equipment where size, current efficiency, and thermal drift are critical constraints.

FAQ

Is ZRC500A02STZ a three-terminal or two-terminal device?

ZRC500A02STZ is functionally a two-terminal shunt voltage reference (anode and cathode), though packaged in a 3-pin SOT23. Pin 3 is internally unused or tied to Pin 1 depending on variant; per datasheet, it must remain unconnected in the F-suffix version used for this part number.

Can ZRC500A02STZ drive a 10 nF capacitive load without oscillation?

Yes. The ZRC500A02STZ is explicitly characterized for stability with capacitive loads up to 10 nF, confirmed by transient response plots and application notes. No external series resistor or isolation capacitor is required for reliable operation.

What is the maximum safe reverse current before damage occurs?

The absolute maximum reverse current is 25 mA per datasheet Absolute Maximum Ratings. However, the device withstands transient surges up to 200 mA due to its rugged 20 V process design-this surge rating applies only to short-duration events (<100 µs), not continuous operation.

Does ZRC500A02STZ require a minimum load current to maintain regulation?

Yes. Regulation is guaranteed above 19 µA (typical knee current), with recommended operating current between 25 µA and 5 mA. Below 19 µA, output voltage drops nonlinearly; operation below 25 µA is possible but requires verification against actual circuit conditions.

ZRC500A02STZ 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:: ±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:: TO-92

ZRC500A02STZ FAQ

1.How can I place an order for ZRC500A02STZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC500A02STZ 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 ZRC500A02STZ reliable?

The price and inventory of ZRC500A02STZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC500A02STZ is usually 5 days.

3.What payment methods are accepted for ZRC500A02STZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC500A02STZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC500A02STZ?

ZRC500A02STZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC500A02STZ 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 ZRC500A02STZ?

For technical support, including ZRC500A02STZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC500A02STZ requirements.

6.How does Aetrix verify that ZRC500A02STZ is sourced from the original manufacturer or authorized distributors?

All ZRC500A02STZ 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 ZRC500A02STZ meets industry standards.

7.What is the process for return or replacement of ZRC500A02STZ?

All ZRC500A02STZ units undergo pre-shipment inspection (PSI). If there is an issue with ZRC500A02STZ, 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 ZRC500A02STZ part is unused and in its original packaging.

Return procedure for ZRC500A02STZ:

1.Submit a request within 90 days.

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

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