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

Diodes Incorporated ZRC250A01

Name: ZRC250A01
Brand: Diodes Incorporated
SKU: ZRC250A01
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC250A01

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZRC250A01.pdf

Description:: IC VREF SHUNT 1% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:2,712

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Product details

Overview

ZRC250A01 from Diodes Incorporated is a precision 2.5 V micropower voltage reference IC using bandgap architecture, with ±1% initial tolerance, 30 ppm/°C typical temperature coefficient, and stable operation from 20 µA to 5 mA supply current. It requires no external capacitor, achieves <10 µs transient settling, and is rated for industrial temperature range (−40°C to +85°C), commonly used in battery-powered instrumentation and portable test equipment.

For engineers reviewing the ZRC250A01 datasheet, ZRC250A01 pinout, ZRC250A01 application, or ZRC250A01 equivalent, key selection criteria include knee current (15 µA typ), slope resistance (0.4 Ω typ), reverse dynamic impedance (0.3 Ω at 1 mA), wideband noise (60 µV_rms), and stability under capacitive loads without compensation.

Technical Context

The ZRC250A01 operates as a two-terminal shunt voltage reference, sinking current to maintain a precise 2.5 V across its terminals. Its bandgap core delivers low drift and high PSRR, with slope resistance of 0.4 Ω enabling tight regulation under varying load currents from 15 µA to 25 mA.

It exhibits fast transient response (<10 µs stabilization after step load), operates without external capacitance, and maintains stability with capacitive loads up to 1 µF - critical for low-power sensor front-ends and ADC reference rails where board space and component count are constrained.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.500 V ±1% (tight initial accuracy enables direct use in 12-bit ADC references without trimming)
Tempco (TC)	30 ppm/°C typical (low drift supports stable measurements over −40°C to +85°C industrial range)
Knee Current	15 µA typical (enables reliable start-up and regulation in ultra-low-power wake-up circuits)
Slope Resistance	0.4 Ω typical (minimizes output voltage shift under load current changes up to 5 mA)
Transient Settling	<10 µs (supports fast-sampling systems requiring rapid reference stabilization after power-on or mode switch)
Wideband Noise	60 µV_rms (10 Hz–10 kHz; suitable for precision analog signal chains without added filtering)
Max Operating Current	25 mA absolute maximum (robustness against surge events in battery-backed systems)

Pinout & Package

E-Line (TO-92 style) 3-pin package with pin 3 floating or connected to pin 1 per datasheet; mechanical outline matches standard TO-92 but optimized for surface-mount compatibility.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Current sink input	Connects to regulated rail; device sinks current to clamp voltage at 2.5 V
Cathode (Pin 2)	Reference output / ground reference	Provides stable 2.5 V node; must be tied to system ground or low-impedance return path
Pin 3	NC or tied to Pin 1	Unused terminal; datasheet permits connection to Pin 1 to reduce thermal resistance or improve layout symmetry

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference design in space-constrained PCB layouts (e.g., wearable sensor nodes)
Low knee current (15 µA typ)	Allows operation in always-on monitoring circuits powered by coin cells or energy harvesters
Stable with capacitive loads	Supports direct connection to ADC input caps or op-amp feedback networks without oscillation risk
30 ppm/°C tempco	Meets accuracy requirements for Class I portable multimeters and handheld calibration tools
0.4 Ω slope resistance	Reduces output error to <2 mV when load current varies between 100 µA and 3 mA

Applications

Battery-Powered Multimeters

Portable Data Loggers

Use Scenario: Handheld digital multimeter operating from two AA cells with auto-ranging ADC and LCD display.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.5 V reference for 16-bit sigma-delta ADC conversion.

Use Value: ±1% tolerance and 30 ppm/°C drift ensure measurement accuracy remains within 0.1% full-scale over temperature without calibration.

Use Scenario: Solar-powered environmental sensor node logging temperature/humidity every 5 minutes.

IC Role / Device Role / Timing Role: Precision reference for low-power SAR ADC sampling analog sensor outputs.

Use Value: 15 µA knee current allows continuous reference biasing during sleep mode, reducing wake-up latency and improving timestamp accuracy.

Industrial Panel Meters

Medical Vital Sign Monitors

Use Scenario: DIN-rail mounted 4–20 mA loop-powered process indicator with local display.

IC Role / Device Role / Timing Role: Reference source for isolated 24-bit delta-sigma ADC measuring loop current via shunt resistor.

Use Value: 0.4 Ω slope resistance minimizes gain error variation across 4–20 mA span, maintaining <0.02% linearity.

Use Scenario: Portable ECG monitor with lead-off detection and real-time waveform display.

IC Role / Device Role / Timing Role: Stable reference for analog front-end PGA and anti-aliasing filter biasing.

Use Value: 60 µV_rms wideband noise prevents degradation of SNR in sub-µV biopotential signal acquisition.

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 output (2.5 V set via resistors); higher 2 mA min cathode current; 20 ppm/°C TC	Requires two external resistors; less suitable for fixed-voltage, ultra-low-current designs	Prefer when adjustable reference or higher current drive is needed
REF3025AIDBZR	Series reference; 50 µA quiescent current; 75 ppm/°C max TC; requires bypass cap	Higher power consumption; not shunt-based; needs external 1 µF capacitor	Choose for lower noise (25 µV_rms) and tighter TC spec in non-space-constrained layouts

Compared with TL431ACDBVR and REF3025AIDBZR, the ZRC250A01 offers lowest knee current and zero external components for fixed 2.5 V, making it optimal for battery life-critical, minimalist shunt reference designs where board area is premium.

Availability

ZRC250A01 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable test equipment, and industrial panel meters requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZRC250A01 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, with design centers across Asia and manufacturing in Taiwan and China.

The ZRC250 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-accuracy shunt reference applications in portable and industrial instrumentation where minimal external components and robust thermal performance are essential.

FAQ

What is the minimum operating current for reliable regulation of ZRC250A01?

The ZRC250A01 achieves stable regulation at a typical knee current of 15 µA, with guaranteed operation starting at 13 µA (min) per datasheet. Below this, output voltage deviates nonlinearly; design margin recommends ≥20 µA for full-spec performance across temperature and unit-to-unit variation.

Can ZRC250A01 drive a 1000 pF capacitive load without oscillation?

Yes - the ZRC250A01 is explicitly characterized as stable with capacitive loads up to 1 µF, including 1000 pF. Its internal compensation and low 0.4 Ω slope resistance eliminate need for series isolation resistors or external damping networks in typical ADC reference or op-amp biasing configurations.

How does ZRC250A01 compare to ZRC250F01 in SOT23 package?

ZRC250A01 (E-Line TO-92) and ZRC250F01 (SOT23) share identical electrical specs (±1% tolerance, 30 ppm/°C TC, 15 µA knee current), differing only in package: E-Line offers higher power dissipation (500 mW vs. 330 mW) and through-hole/SMT hybrid mounting flexibility, while SOT23 provides smaller footprint for ultra-dense layouts.

Is ZRC250A01 qualified for automotive applications?

No - ZRC250A01 is specified for industrial temperature range (−40°C to +85°C) and lacks AEC-Q200 qualification or extended temperature grading. For automotive use, Diodes offers the AP431x family with AEC-Q100 qualification and −40°C to +125°C operation, though with higher minimum current and different topology.

ZRC250A01 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: E-Line-3

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

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

Voltage - Output (Max):: -

Current - Output:: 5 mA

Tolerance:: ±1%

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:: E-Line (TO-92 compatible)

ZRC250A01 FAQ

1.How can I place an order for ZRC250A01 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC250A01 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 ZRC250A01 reliable?

The price and inventory of ZRC250A01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC250A01 is usually 5 days.

3.What payment methods are accepted for ZRC250A01?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC250A01 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC250A01?

ZRC250A01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC250A01 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 ZRC250A01?

For technical support, including ZRC250A01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC250A01 requirements.

6.How does Aetrix verify that ZRC250A01 is sourced from the original manufacturer or authorized distributors?

All ZRC250A01 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 ZRC250A01 meets industry standards.

7.What is the process for return or replacement of ZRC250A01?

All ZRC250A01 units undergo pre-shipment inspection (PSI). If there is an issue with ZRC250A01, 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 ZRC250A01 part is unused and in its original packaging.

Return procedure for ZRC250A01:

1.Submit a request within 90 days.

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

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