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

Diodes Incorporated ZRC500F02TA

Name: ZRC500F02TA
Brand: Diodes Incorporated
SKU: ZRC500F02TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC500F02TA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZRC500F02TA.pdf

Description:: IC VREF SHUNT 2% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:6,000

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Product details

Overview

ZRC500F02TA 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 fast transient response (<10 µs), making it ideal for low-power portable instrumentation and battery-powered metering systems.

For engineers reviewing the ZRC500F02TA datasheet, ZRC500F02TA pinout, ZRC500F02TA application, or ZRC500F02TA equivalent, key selection criteria include knee current, slope resistance, TC stability over –40°C to +85°C, and SOT23-3 package compatibility in space-constrained analog signal chains.

Technical Context

The ZRC500F02TA implements a two-terminal bandgap-based shunt reference topology with internal curvature compensation, enabling stable 5.0 V regulation across industrial temperature range (–40°C to +85°C). Its low 0.4 Ω typical slope resistance and 105 µV_rms wideband noise support high-accuracy ADC biasing and precision DAC references.

Unlike series references, it functions as a shunt device requiring an external current source; its 200 mA surge capability and 20 V process withstand transient overloads common in portable equipment power rails, while maintaining regulation within ±0.5% over full operating current range.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	5.0 V nominal, ±2% initial tolerance - ensures accurate 5 V bias point for 12-bit+ data converters
Temperature Coefficient	30 ppm/°C typical - contributes ≤1.5 mV drift over –40°C to +85°C ambient
Knee Current	19 µA typical - enables stable regulation down to ultra-low-power sleep modes
Slope Resistance	0.4 Ω typical - minimizes output voltage shift under dynamic load changes
Transient Response	<10 µs to stabilize - supports fast-sampling systems requiring rapid reference settling
Noise (10 Hz–10 kHz)	105 µV_rms - avoids quantization noise floor degradation in precision measurement front-ends
Operating Current Range	25 µA to 5 mA - compatible with microcontroller I/O pins or dedicated bias resistors

Pinout & Package

Supplied in SOT23-3 package (JEDEC TO-236AB), with 1.3 mm × 2.9 mm footprint and 1.1 mm height. Pin 1 is floating or tied to Pin 2 per typical application; Pin 2 is GND; Pin 3 is VR (cathode/anode configuration per shunt operation).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	NC or GND tie	Optional connection to ground for improved thermal symmetry; left open in standard shunt use
Pin 2	GND	Anode terminal - return path for reference current; must be low-impedance to system ground
Pin 3	VR	Cathode terminal - regulated 5.0 V output node; connects to load and current-setting resistor

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into compact PCB layouts without stability-compromising bypass components
Low knee current (19 µA)	Supports operation in energy-harvesting and coin-cell applications where supply current is tightly constrained
Stable with capacitive loads	Allows direct connection to ADC input capacitors or op-amp feedback networks without oscillation risk
Green molding compound (Br/Sb-free)	Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow compliance for lead-free assembly
Rugged 200 mA surge rating	Withstands ESD and load-dump transients in portable test equipment without external protection diodes

Applications

Battery-Powered Multimeters

Portable Data Loggers

Use Scenario: Handheld digital multimeter requiring stable 5 V reference for 16-bit sigma-delta ADC during 100-sample/s acquisition.

IC Role / Device Role / Timing Role: Shunt voltage reference providing precision bias to ADC reference input and internal analog front-end.

Use Value: 30 ppm/°C TC and 0.4 Ω slope resistance ensure <±0.01% full-scale error across operating temperature and battery discharge curve.

Use Scenario: Solar-powered environmental sensor node logging temperature/humidity every 5 minutes using ultra-low-quiescent LDO and microcontroller.

IC Role / Device Role / Timing Role: Primary voltage reference for ADC and calibration lookup tables stored in flash memory.

Use Value: 19 µA knee current allows continuous reference operation during 99% deep-sleep duty cycle, extending 2032 coin cell life beyond 3 years.

Industrial Panel Meters

Calibration Equipment

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

IC Role / Device Role / Timing Role: Stable 5 V reference for current-loop DAC and isolated analog-to-digital conversion stage.

Use Value: 200 mA surge rating tolerates 24 V loop transients without latch-up, eliminating need for redundant TVS protection.

Use Scenario: Benchtop calibration source verifying accuracy of handheld DMMs and oscilloscope DC offset circuits.

IC Role / Device Role / Timing Role: Precision shunt reference used in programmable voltage source feedback network.

Use Value: 105 µV_rms noise floor prevents added uncertainty in sub-mV-level calibration steps at 25°C lab conditions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431ACDBVR	Adjustable 1.24–18 V output; 2% tolerance at 2.5 V setting; 100 ppm/°C TC; requires external resistors	Used where programmability or non-5 V outputs are needed; higher TC increases drift in wide-temp environments	Select when adjustable reference or tighter initial tolerance at non-5 V is required; accept higher thermal drift
LM4040CIM3-5.0	Fixed 5.0 V; ±0.5% tolerance; 100 ppm/°C TC; 60 µA knee current; SOT23-3	Preferred where tighter initial accuracy is critical; higher knee current limits ultra-low-power use	Select for highest initial accuracy in lab-grade instruments; avoid in sub-50 µA current budgets

Compared with TLVH431ACDBVR and LM4040CIM3-5.0, ZRC500F02TA offers the lowest knee current and best TC among SOT23-3 shunt references at 5 V, trading ±2% tolerance for superior low-power stability and thermal performance in portable measurement systems.

Availability

ZRC500F02TA 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 lots.

Supply support for ZRC500F02TA 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 ZRC500 series belongs to Diodes' precision analog reference product line, engineered specifically for low-knee-current, capacitor-free shunt regulation in space- and power-constrained measurement and portable electronics.

FAQ

What is the minimum operating current for stable regulation?

The ZRC500F02TA achieves stable 5.0 V regulation at a typical knee current of 19 µA, with guaranteed operation starting at 25 µA across the full industrial temperature range. Below this, output voltage drops nonlinearly; design must ensure bias current remains ≥25 µA under worst-case conditions including low temperature and aging.

Can it drive capacitive loads directly?

Yes - the ZRC500F02TA is internally compensated and stable with capacitive loads up to at least 1 µF, as confirmed by Diodes' datasheet transient response curves and application notes. No external series resistor or isolation capacitor is required, simplifying layout in ADC reference and op-amp biasing applications.

How does its temperature coefficient compare to LM4040?

ZRC500F02TA has a typical TC of 30 ppm/°C versus LM4040C's 100 ppm/°C. This results in ~3× less voltage drift over –40°C to +85°C: ±1.26 mV vs ±4.2 mV. The lower TC stems from proprietary curvature compensation in the bandgap core, verified in DS32173 Figure 3.

Is Pin 1 required to be connected?

No - Pin 1 is not electrically connected and may be left floating. Diodes' datasheet shows it optionally tied to Pin 2 (GND) to improve thermal symmetry in high-accuracy applications, but standard operation requires only Pins 2 (GND) and 3 (VR); no functional dependency on Pin 1 exists.

ZRC500F02TA 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:: Active

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

ZRC500F02TA FAQ

1.How can I place an order for ZRC500F02TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC500F02TA 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 ZRC500F02TA reliable?

The price and inventory of ZRC500F02TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC500F02TA is usually 5 days.

3.What payment methods are accepted for ZRC500F02TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC500F02TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC500F02TA?

ZRC500F02TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC500F02TA 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 ZRC500F02TA?

For technical support, including ZRC500F02TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC500F02TA requirements.

6.How does Aetrix verify that ZRC500F02TA is sourced from the original manufacturer or authorized distributors?

All ZRC500F02TA 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 ZRC500F02TA meets industry standards.

7.What is the process for return or replacement of ZRC500F02TA?

All ZRC500F02TA units undergo pre-shipment inspection (PSI). If there is an issue with ZRC500F02TA, 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 ZRC500F02TA part is unused and in its original packaging.

Return procedure for ZRC500F02TA:

1.Submit a request within 90 days.

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

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