Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated ZRC250A02STOA

Name: ZRC250A02STOA
Brand: Diodes Incorporated
SKU: ZRC250A02STOA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ZRC250A02STOA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZRC250A02STOA.pdf

Description:: IC VREF SHUNT 2% TO92

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,978

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ZRC250A02STOA from Diodes Incorporated is a precision 2.5 V bandgap voltage reference IC with ±2% initial tolerance, 30 ppm/°C typical temperature coefficient, and 0.4 Ω typical slope resistance. It operates stably from 20 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 test equipment.

For engineers reviewing the ZRC250A02STOA datasheet, ZRC250A02STOA pinout, ZRC250A02STOA application, or ZRC250A02STOA equivalent, key selection criteria include knee current (15 µA typ), load stability with capacitive outputs, TC performance across –40°C to +85°C, and SOT23-3 package compatibility in space-constrained designs.

Technical Context

The ZRC250A02STOA implements a two-terminal shunt reference architecture using a curvature-compensated bandgap core, enabling stable 2.5 V output without series pass elements or external compensation. Its low 0.4 Ω dynamic impedance and 60 µV_rms wideband noise (10 Hz–10 kHz) support high-accuracy ADC/DAC biasing and precision analog signal conditioning.

Designed for direct connection between supply rail and ground, it functions as a programmable current sink with reverse breakdown behavior-operating current flows from anode to cathode. The device maintains regulation under capacitive loads up to 1 µF and withstands transient currents up to 200 mA due to rugged 20 V process technology.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.5 V ±2% at 150 µA, ensuring accurate DAC/ADC reference scaling in 3.3 V systems
Temp Coefficient	30 ppm/°C typical, limiting drift to ±1.25 mV over –40°C to +85°C operating range
Slope Resistance	0.4 Ω typical, minimizing output voltage shift under load current variations
Knee Current	15 µA typical, enabling stable regulation down to ultra-low-power sleep modes
Transient Response	Stabilizes in <10 µs after step load, supporting fast-sampling data acquisition
Noise (10 Hz–10 kHz)	60 µV_rms, suitable for 16-bit+ precision measurement front-ends
Operating Current Range	20 µA to 5 mA, covering both standby and active measurement phases

Pinout & Package

SOT23-3 package (suffix "F"), 1.3 mm × 2.9 mm footprint, surface-mount compatible. Pin 1 = Anode (input), Pin 2 = Cathode (output/reference node), Pin 3 = NC (no connect, internally floating or tied to Pin 1 per marking variant).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Current input terminal	Connected to unregulated supply rail; sinks regulated current into cathode
Pin 2 (Cathode)	Reference output node	Provides stable 2.5 V relative to ground; serves as precision bias point
Pin 3 (NC)	Non-connected terminal	Internally isolated or bonded to Pin 1 per manufacturing variant; no external connection required

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference design in PCB area-constrained layouts
Low knee current (15 µA typ)	Supports operation in energy-harvesting and coin-cell-powered devices
Stable with capacitive loads	Eliminates need for isolation resistors when driving ADC sample-and-hold inputs
Rugged 200 mA surge rating	Withstands ESD events and power-rail transients without derating or protection circuitry
Industrial temperature range	Validated operation from –40°C to +85°C ensures reliability in field-deployed instruments

Applications

Portable Multimeter Front-End

Battery-Managed IoT Sensor Node

Use Scenario: High-impedance voltage measurement channel in handheld DMM requiring stable 2.5 V reference for 200 mV full-scale range.

IC Role / Device Role / Timing Role: Two-terminal shunt reference providing ratiometric scaling for 24-bit sigma-delta ADC.

Use Value: 30 ppm/°C TC and 60 µV_rms noise enable ±0.01% measurement accuracy across ambient temperature swings.

Use Scenario: Power-supply monitoring in BLE-enabled environmental sensor with coin-cell battery life target >5 years.

IC Role / Device Role / Timing Role: Low-current reference for ADC-based battery voltage telemetry during deep-sleep cycles.

Use Value: 15 µA knee current allows continuous reference biasing while drawing <1 µA average system current in sleep mode.

Programmable Logic Controller Analog Input Module

Calibration-Traceable Test Fixture

Use Scenario: 4–20 mA loop-powered analog input stage requiring stable excitation and reference for current-to-voltage conversion.

IC Role / Device Role / Timing Role: Precision shunt reference establishing gain-setting node for op-amp transimpedance amplifier.

Use Value: 0.4 Ω slope resistance limits gain error to <0.02% over 4–20 mA input range variation.

Use Scenario: Benchtop calibration source for verifying multimeter accuracy against NIST-traceable standards.

IC Role / Device Role / Timing Role: Primary voltage reference in self-contained calibration instrument with manual/automated test sequencing.

Use Value: ±2% initial tolerance and <10 µs transient recovery allow rapid step-response verification per ANSI/IEEE C37.90.1.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431AIDBZR	Adjustable output (2.5 V set via resistors); higher 100 ppm/°C max TC; 0.2 Ω typical R_s	Requires external resistor network; better for variable-reference designs but adds layout area and tolerance stack-up	Select when programmability or tighter slope resistance outweighs fixed-voltage simplicity
LM4040C25IDBZR	Fixed 2.5 V; 100 ppm/°C max TC; 0.5 Ω typical R_s; requires ≥60 µA min current	Higher knee current limits use in sub-50 µA systems; wider TC impacts wide-temperature deployments	Select when cost sensitivity dominates and ambient temperature stays near 25°C

Compared with TLVH431AIDBZR and LM4040C25IDBZR, the ZRC250A02STOA offers the lowest knee current and tightest TC among SOT23 shunt references, making it optimal for battery-critical and thermally variable instrumentation where minimal external components and guaranteed low-current regulation are mandatory.

Availability

ZRC250A02STOA is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered test equipment, and industrial analog input modules requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZRC250A02STOA 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 power management, signal integrity, and connectivity applications.

The ZRC250 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability analog subsystems in portable and industrial measurement equipment.

FAQ

Is ZRC250A02STOA a three-terminal or two-terminal device?

ZRC250A02STOA is functionally a two-terminal shunt voltage reference: current enters the anode (Pin 1) and exits the cathode (Pin 2). Pin 3 is internally not connected and may be left unconnected on the PCB. Its operation does not require a third control or ground-referenced terminal.

Can ZRC250A02STOA drive a 1000 pF capacitive load without oscillation?

Yes-the ZRC250A02STOA is explicitly characterized as stable with capacitive loads up to 1 µF, including 1000 pF. No series isolation resistor is needed, unlike many competing shunt references that require external damping networks for stability.

What is the maximum safe reverse current before degradation occurs?

The absolute maximum reverse current is 25 mA per datasheet. However, the device is rated for transient surges up to 200 mA due to its rugged 20 V process. Continuous operation above 5 mA increases self-heating and should be avoided unless thermal design accommodates the resulting power dissipation.

Does ZRC250A02STOA require a minimum load current to maintain regulation?

No-it regulates down to 15 µA typical knee current and remains stable from 20 µA to 5 mA. Unlike some references needing minimum load for loop stability, the ZRC250A02STOA's bandgap design achieves regulation without external loading, enabling true zero-load standby operation.

ZRC250A02STOA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

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

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 2.5V

Voltage - Output (Max):: -

Current - Output:: 5 mA

Tolerance:: ±2%

Temperature Coefficient:: 90ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 60µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 20 µA

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92

ZRC250A02STOA FAQ

1.How can I place an order for ZRC250A02STOA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC250A02STOA 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 ZRC250A02STOA reliable?

The price and inventory of ZRC250A02STOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC250A02STOA is usually 5 days.

3.What payment methods are accepted for ZRC250A02STOA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC250A02STOA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC250A02STOA?

ZRC250A02STOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC250A02STOA 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 ZRC250A02STOA?

For technical support, including ZRC250A02STOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC250A02STOA requirements.

6.How does Aetrix verify that ZRC250A02STOA is sourced from the original manufacturer or authorized distributors?

All ZRC250A02STOA 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 ZRC250A02STOA meets industry standards.

7.What is the process for return or replacement of ZRC250A02STOA?

All ZRC250A02STOA units undergo pre-shipment inspection (PSI). If there is an issue with ZRC250A02STOA, 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 ZRC250A02STOA part is unused and in its original packaging.

Return procedure for ZRC250A02STOA:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…