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

Diodes Incorporated ZRC250F03TA

Name: ZRC250F03TA
Brand: Diodes Incorporated
SKU: ZRC250F03TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC250F03TA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZRC250F03TA.pdf

Description:: IC VREF SHUNT 3% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:5,713

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Product details

Overview

ZRC250F03TA from Diodes Incorporated is a precision 2.5 V bandgap voltage reference IC with ±3% initial tolerance, 30 ppm/°C typical temperature coefficient, 0.4 Ω typical slope resistance, 15 µA typical knee current, and stable operation from 20 µA to 5 mA - used as a low-power reference in portable instrumentation and battery-powered test equipment.

For engineers reviewing the ZRC250F03TA datasheet, ZRC250F03TA pinout, ZRC250F03TA application, or ZRC250F03TA equivalent, key selection criteria include knee current compliance, load capacitance independence, transient response under 10 µs, and SOT23-3 package compatibility in space-constrained analog signal chains.

Technical Context

The ZRC250F03TA implements a bandgap-based reverse-biased Zener topology optimized for micropower operation without external stabilization capacitors. It achieves voltage regulation via curvature-corrected bandgap core and exhibits low dynamic impedance (0.3–0.8 Ω) across 100 Hz–100 kHz.

Its design supports direct connection to ADC reference inputs, DAC bias nodes, and comparator thresholds in systems requiring <10 µs settling after supply transients. The device maintains specified accuracy over −40°C to +85°C with no thermal hysteresis compensation circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	2.5 V ±3% at 150 µA - defines absolute accuracy of analog measurement and conversion circuits
Temperature Coefficient	30 ppm/°C typical - contributes ≤±0.75 mV drift over full industrial range (−40°C to +85°C)
Knee Current	15 µA typical - minimum current enabling regulation onset; enables ultra-low-power sleep-mode reference hold
Slope Resistance	0.4 Ω typical - ensures <1 mV output shift per 2.5 mA load change; critical for high-resolution ADC references
Transient Response	Stable in <10 µs - supports fast wake-up from power-gating in portable data loggers and sensor nodes
Noise (10 Hz–10 kHz)	60 µV_rms - limits effective resolution to ~18.5 bits in 2.5 V full-scale 24-bit sigma-delta ADCs
Operating Current Range	20 µA to 5 mA - accommodates both microcontroller-based metering and higher-speed test instrument front-ends

Pinout & Package

Supplied in SOT23-3 package (JEDEC TO-236AB), 2.9 mm × 1.3 mm footprint, 1.1 mm height, with gull-wing leads and green molding compound (Br/Sb-free).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode / Input	Reverse-biased terminal; connects to system supply rail; floating or tied to Pin 2 for enhanced stability in noisy environments
2	Cathode / Output	2.5 V regulated output node; directly drives ADC REF+, DAC VREF, or op-amp reference inputs
3	GND	Ground reference for internal bandgap core; must be low-impedance path to system AGND to minimize PSRR degradation

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference placement in PCB-constrained IoT sensor nodes and handheld calibrators
Low knee current (15 µA)	Permits use with high-value discharge resistors in battery backup circuits without sacrificing regulation
Stable with capacitive loads	Eliminates need for isolation resistors when driving SAR ADC sample-and-hold capacitors up to 10 nF
Fast transient response (<10 µs)	Supports synchronous wake-up of mixed-signal SoCs where reference must settle before first ADC conversion
Green molding compound	Meets RoHS 2011/65/EU Annex II exemption 7(a); suitable for medical and consumer-grade CE-marked devices

Applications

Battery-Powered Multimeters

Portable Gas Detectors

Use Scenario: Handheld digital multimeter operating from two AA cells with auto-ranging and 4½-digit display.

IC Role / Device Role / Timing Role: Primary 2.5 V reference for dual-slope ADC and LCD bias generation.

Use Value: 15 µA knee current extends battery life beyond 200 hours; ±3% tolerance meets IEC 61010-1 Class II accuracy requirements.

Use Scenario: Intrinsically safe portable gas detector with electrochemical sensor and low-power MCU.

IC Role / Device Role / Timing Role: Stable excitation voltage source for sensor bias and ADC reference in sub-100 µA active mode.

Use Value: Capacitor-free operation avoids BOM cost and board area; 30 ppm/°C TC ensures calibration stability across −20°C to +50°C field environment.

Industrial Data Loggers

Calibration Reference Modules

Use Scenario: Remote environmental logger with thermistor, RTD, and humidity sensors, powered by Li-SOCl₂ battery.

IC Role / Device Role / Timing Role: Precision reference for multiplexed 24-bit sigma-delta ADC measuring multiple sensor bridges.

Use Value: 0.4 Ω slope resistance minimizes gain error from sensor excitation current variation; 60 µV_rms noise preserves ENOB > 20 bits.

Use Scenario: Benchtop calibration module verifying DMMs and process calibrators against NIST-traceable standards.

IC Role / Device Role / Timing Role: Secondary reference in self-test loop, compared against primary LTZ1000-based standard.

Use Value: Sub-10 µs transient response enables rapid reference switching during automated test sequences; SOT23-3 allows dense layout on metrology-grade PCBs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV431ACDBVR	Adjustable shunt reference (1.24–6 V); 2% tolerance; 50 ppm/°C TC; requires external resistor divider	Used where programmable reference voltage or tighter output flexibility is needed	Select when system requires >2.5 V reference or dynamic voltage adjustment via MCU GPIO
MAX6025AEUR+T	Fixed 2.5 V; 0.1% tolerance; 10 ppm/°C TC; 65 µA min operating current; SO-8 package	Deployed in high-accuracy lab equipment where long-term drift and initial error dominate	Choose when absolute accuracy and thermal stability outweigh size and quiescent current constraints

Compared with TLV431ACDBVR and MAX6025AEUR+T, ZRC250F03TA offers the smallest footprint and lowest knee current but trades off initial accuracy and temperature stability - optimal for cost-sensitive, space-limited, battery-operated instruments where ±3% and 30 ppm/°C meet functional requirements.

Availability

ZRC250F03TA is available at Aetrix Electronics and suitable for battery-powered multimeters, portable gas detectors, and industrial data loggers requiring stable component supply with consistent SOT23-3 packaging and RoHS-compliant green compound.

Supply support for ZRC250F03TA 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 automotive, industrial, computing, and consumer markets with high-reliability components.

The ZRC250 series belongs to Diodes' precision analog portfolio, designed specifically for low-power, space-constrained voltage reference applications in portable and battery-operated instrumentation.

FAQ

Can ZRC250F03TA operate without an external capacitor?

Yes. The ZRC250F03TA is internally compensated and remains stable with no external capacitor - verified across capacitive loads up to 10 nF and supply variations per DS32182 Rev. 6-2. This eliminates BOM cost and PCB area in compact designs.

What is the maximum load current ZRC250F03TA can drive while maintaining regulation?

ZRC250F03TA maintains regulation up to 5 mA per datasheet specifications, with absolute maximum rating of 25 mA. At 5 mA, output deviation remains within ±3% due to its 0.4 Ω typical slope resistance - sufficient for driving ADC references and op-amp bias networks.

How does ZRC250F03TA behave during power-up or supply transients?

ZRC250F03TA reaches stable 2.5 V output in less than 10 µs after input voltage step, as confirmed by transient response waveforms in DS32182. This enables immediate ADC sampling upon wake-up in energy-harvesting and duty-cycled sensor systems.

Is ZRC250F03TA compatible with lead-free reflow profiles?

Yes. The SOT23-3 package uses green (Br/Sb-free) molding compound and is rated for standard JEDEC J-STD-020D lead-free reflow, with peak temperature up to 260°C for 30 seconds - fully compatible with modern RoHS-compliant assembly lines.

ZRC250F03TA 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):: 2.5V

Voltage - Output (Max):: -

Current - Output:: 5 mA

Tolerance:: ±3%

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:: Surface Mount

Supplier Device Package:: SOT-23-3

ZRC250F03TA FAQ

1.How can I place an order for ZRC250F03TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC250F03TA 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 ZRC250F03TA reliable?

The price and inventory of ZRC250F03TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC250F03TA is usually 5 days.

3.What payment methods are accepted for ZRC250F03TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC250F03TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC250F03TA?

ZRC250F03TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC250F03TA 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 ZRC250F03TA?

For technical support, including ZRC250F03TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC250F03TA requirements.

6.How does Aetrix verify that ZRC250F03TA is sourced from the original manufacturer or authorized distributors?

All ZRC250F03TA 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 ZRC250F03TA meets industry standards.

7.What is the process for return or replacement of ZRC250F03TA?

All ZRC250F03TA units undergo pre-shipment inspection (PSI). If there is an issue with ZRC250F03TA, 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 ZRC250F03TA part is unused and in its original packaging.

Return procedure for ZRC250F03TA:

1.Submit a request within 90 days.

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

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