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

Diodes Incorporated ZRC500F02TC

Name: ZRC500F02TC
Brand: Diodes Incorporated
SKU: ZRC500F02TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC500F02TC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: ZRC500F02TC.pdf

Description:: IC VREF SHUNT 2% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:2,566

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Product details

Overview

ZRC500F02TC from Diodes Incorporated is a precision 5.0 V bandgap voltage reference IC with ±2% initial tolerance, 30 ppm/°C typical temperature coefficient, and 19 µA typical knee current. It operates stably from 25 µA to 5 mA without external capacitors and delivers microsecond-scale transient response (<10 µs), making it ideal for low-power portable instrumentation and battery-powered metering systems.

For engineers reviewing the ZRC500F02TC datasheet, ZRC500F02TC pinout, ZRC500F02TC application, or ZRC500F02TC equivalent, key selection criteria include knee current, slope resistance, TC stability over –40°C to +85°C, transient settling time, and SOT23-3 package compatibility in space-constrained designs.

Technical Context

The ZRC500F02TC implements a two-terminal bandgap reference architecture optimized for low-knee-current operation, enabling stable regulation down to 19 µA. Its internal design eliminates need for external stabilization capacitance while maintaining <10 µs transient recovery under load steps.

It functions as a shunt-mode reference: cathode (VR) and anode (GND) terminals define reverse-biased operation, with pin 1 floating or tied to GND per layout guidance. Slope resistance of 0.4 Ω (typ) and dynamic impedance of 0.3 Ω (at 1 mA, 100 Hz) support high PSRR and low-noise performance in precision analog signal chains.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	5.0 V ±2% at 150 µA - defines absolute accuracy baseline for ADC/DAC biasing and sensor excitation
Knee Current	19 µA typical - minimum current to achieve regulation; enables ultra-low-power sleep-mode reference retention
Temp Coefficient	30 ppm/°C typical - ensures ≤1.5 mV drift over –40°C to +85°C ambient, critical for portable measurement accuracy
Slope Resistance	0.4 Ω typical - low output impedance minimizes load-induced voltage error in varying-current applications
Transient Response	<10 µs to settle - supports fast wake-up sequences in duty-cycled systems without reference instability
Noise (10Hz–10kHz)	105 µV_rms - limits contribution to system noise floor in high-resolution data acquisition front-ends
Operating Current Range	25 µA to 5 mA - wide compliance range simplifies resistor selection across battery voltage decay profiles

Pinout & Package

Package: SOT23-3 (suffix F), surface-mount, 2.9 mm × 1.3 mm footprint with 0.95 mm height; JEDEC MO-178 compliant.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	NC or GND tie	Not internally connected; may be left floating or bonded to Pin 2 for mechanical stability per datasheet recommendation
Pin 2	Anode / GND	Reference return path; must be low-impedance connection to system ground plane to minimize noise coupling
Pin 3	Cathode / VR	5.0 V output node; connects to load or feedback network; requires Kelvin sensing in high-accuracy applications

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference implementation in PCB area-constrained designs like handheld meters
Low knee current (19 µA)	Permits use with high-value bias resistors (>1 MΩ) in coin-cell-powered devices without sacrificing regulation
Stable with capacitive loads	Supports direct connection to ADC input capacitors or op-amp feedback networks without oscillation risk
Green molding compound	Halogen-free (Br/Sb-free) packaging meets RoHS and IEC 61249-2-21 compliance for industrial and medical end equipment
Transient immunity up to 200 mA	Rugged process allows survival of ESD events and supply rail transients without latch-up or parametric shift

Applications

Portable Multimeter Reference

Battery-Powered Data Logger

Use Scenario: Precision DC voltage measurement in handheld multimeters operating from 9 V alkaline or Li-ion cells.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.0 V reference for 16-bit SAR ADC and display driver biasing.

Use Value: ±2% tolerance and 30 ppm/°C TC ensure calibrated accuracy across battery discharge and environmental temperature shifts.

Use Scenario: Long-duration environmental monitoring using coin-cell power and intermittent wireless transmission.

IC Role / Device Role / Timing Role: Low-quiescent reference for sensor signal conditioning and microcontroller ADC during active sampling bursts.

Use Value: 19 µA knee current enables >10-year battery life when paired with sleep-mode MCU and duty-cycled sensors.

Industrial Panel Meter Front-End

Calibration Equipment Reference Source

Use Scenario: DIN-rail mounted panel meter measuring AC/DC voltage/current with local digital display and analog output.

IC Role / Device Role / Timing Role: Primary reference for isolated sigma-delta ADC and DAC generating 4–20 mA loop output.

Use Value: 0.4 Ω slope resistance minimizes gain error drift under varying load currents across 4–20 mA range.

Use Scenario: Benchtop calibration source verifying DMMs and process calibrators in metrology labs.

IC Role / Device Role / Timing Role: Secondary reference standard traceable to primary standards via thermal stabilization and low-noise filtering.

Use Value: 105 µV_rms broadband noise and <10 µs transient response enable fast, repeatable calibration step-response verification.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431CDBZR	2.5 V nominal, adjustable via external resistors; higher 1 mA min operating current; 50 ppm/°C TC	Requires resistor network for 5 V setup; less suitable for ultra-low-power sleep modes	Prefer when adjustable output or higher current drive capability is needed
REF3050AIDBZR	5.0 V fixed, 50 ppm/°C TC, 50 µA min operating current, 3.3 µV_rms noise	Lower noise but higher knee current; requires bypass capacitor; not inherently stable with capacitive loads	Choose when ultra-low noise dominates over power budget and layout simplicity

Compared with TL431CDBZR and REF3050AIDBZR, ZRC500F02TC uniquely combines sub-20 µA knee current, capacitor-free operation, and SOT23-3 footprint-making it optimal for cost-sensitive, space-limited, battery-operated instrumentation where regulation stability at microamp currents is essential.

Availability

ZRC500F02TC is available at Aetrix Electronics and suitable for portable multimeters, battery-powered data loggers, and industrial panel meters requiring stable component supply with consistent parametric performance across production batches.

Supply support for ZRC500F02TC 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 ZRC series targets precision analog subsystems in portable and battery-powered equipment, emphasizing low-knee-current operation, minimal external components, and robust thermal performance across extended temperature ranges.

FAQ

What is the maximum capacitive load the ZRC500F02TC can drive without instability?

ZRC500F02TC is specified as stable with capacitive loads without external compensation. The datasheet confirms unconditional stability up to at least 1 µF, verified across –40°C to +85°C and 25 µA to 5 mA operating current. This eliminates need for series isolation resistors in ADC reference inputs or op-amp feedback paths.

Can Pin 1 be left unconnected in PCB layout?

Yes - Pin 1 is not electrically connected internally and may be left floating. However, the datasheet recommends connecting it to Pin 2 (GND) for improved mechanical reliability during reflow and thermal cycling. No electrical penalty results from this tie, and it enhances board-level robustness in high-vibration environments.

How does the ZRC500F02TC behave at currents below 25 µA?

At currents below 25 µA - down to the 19 µA typical knee current - the device maintains regulation but with gradually increasing output impedance and reduced TC stability. Operation below 19 µA results in exponential voltage drop; sustained operation below knee current is not recommended for precision applications.

Is the ZRC500F02TC suitable for automotive applications?

No - ZRC500F02TC is rated for industrial temperature range (–40°C to +85°C) and lacks AEC-Q200 qualification. While its absolute max ratings include 20 V processing and 200 mA surge tolerance, it is not validated for automotive-grade reliability, humidity testing, or PPAP documentation. Use only in non-safety-critical industrial or consumer systems.

ZRC500F02TC Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: TO-236-3, SC-59, SOT-23-3

Series:: -

Packaging:: Tape & Reel (TR)

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:: Surface Mount

Supplier Device Package:: SOT-23-3

ZRC500F02TC FAQ

1.How can I place an order for ZRC500F02TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC500F02TC 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 ZRC500F02TC reliable?

The price and inventory of ZRC500F02TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC500F02TC is usually 5 days.

3.What payment methods are accepted for ZRC500F02TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC500F02TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC500F02TC?

ZRC500F02TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC500F02TC 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 ZRC500F02TC?

For technical support, including ZRC500F02TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC500F02TC requirements.

6.How does Aetrix verify that ZRC500F02TC is sourced from the original manufacturer or authorized distributors?

All ZRC500F02TC 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 ZRC500F02TC meets industry standards.

7.What is the process for return or replacement of ZRC500F02TC?

All ZRC500F02TC units undergo pre-shipment inspection (PSI). If there is an issue with ZRC500F02TC, 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 ZRC500F02TC part is unused and in its original packaging.

Return procedure for ZRC500F02TC:

1.Submit a request within 90 days.

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

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