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

Diodes Incorporated ZRC250R01

Name: ZRC250R01
Brand: Diodes Incorporated
SKU: ZRC250R01
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC250R01

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZRC250R01.pdf

Description:: IC VREF SHUNT 1% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:1,992

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Product details

Overview

ZRC250R01 from Zetex Semiconductors (now Diodes Incorporated) is a precision 2.5 V micropower voltage reference IC using bandgap architecture, designed for low-knee-current operation with ±1% initial tolerance, 30 ppm/°C typical temperature coefficient, and stability without external capacitors. It operates from 20 µA to 5 mA and delivers stable output under capacitive loads, making it ideal for battery-powered instrumentation and portable test equipment.

For engineers reviewing the ZRC250R01 datasheet, ZRC250R01 pinout, ZRC250R01 application, or ZRC250R01 equivalent, key selection criteria include knee current (13 µA min), slope resistance (0.4 Ω typ), transient settling time (<10 µs), TC performance across –40°C to +85°C, and compatibility with SOT23, SO8, and E-line (TO92-style) packages.

Technical Context

The ZRC250R01 functions as a two-terminal shunt voltage reference, sinking current to maintain a precise 2.5 V reverse breakdown voltage. Its bandgap-derived core ensures low drift and high PSRR, with specified operation from 13 µA minimum current up to 25 mA absolute max.

It exhibits 0.4 Ω typical slope resistance and 60 µV_rms wideband noise (10 Hz–10 kHz), enabling high-accuracy analog signal conditioning in low-power systems where supply headroom is constrained and load regulation must remain tight across varying current draw.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.500 V ±1% at 150 µA; enables accurate ADC/DAC biasing in 3.3 V or 5 V systems
Temp Coefficient	30 ppm/°C typical; ensures ≤±1.25 mV drift over –40°C to +85°C
Knee Current	13 µA min; allows operation in ultra-low-power sleep modes with minimal quiescent drain
Slope Resistance	0.4 Ω typical; provides <±0.5 mV load regulation error per 1 mA current change
Transient Response	Stable in <10 µs; supports fast wake-up and dynamic reference settling in portable meters
Noise (10 Hz–10 kHz)	60 µV_rms; preserves SNR in 12-bit+ data acquisition front-ends
Max Operating Current	25 mA absolute; withstands short-duration surges without degradation

Pinout & Package

E-Line 3-pin TO92-style package (suffix R), with Pin 3 floating or internally connected to Pin 1 per datasheet revision - intended as a two-terminal device (anode/cathode). No third functional terminal.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Current sink return path	Connected to system ground; completes shunt reference loop
Cathode (Pin 2)	Reference voltage output	Supplies stable 2.5 V to load; requires series resistor from supply rail
Pin 3	Not connected / tied to Pin 1	Internal bond option only; electrically redundant in standard operation

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCB layouts without stability-compromising bypass components
Low knee current (13 µA min)	Supports continuous reference operation during microcontroller deep-sleep states with sub-15 µA system budgets
Stable with capacitive loads	Eliminates need for isolation resistors when driving ADC sample-and-hold inputs or op-amp buffers
Transient response <10 µs	Permits rapid power-up sequencing in handheld test gear without reference settling delays
Rugged 20 V process	Withstands 200 mA surge currents and ESD transients common in field-deployed instrumentation

Applications

Battery-Powered Multimeters

Portable Data Loggers

Use Scenario: Handheld digital multimeter requiring stable 2.5 V reference for 16-bit delta-sigma ADC over 0–100% battery discharge.

IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling for precision measurement front-end.

Use Value: Maintains ±0.025% full-scale accuracy across –40°C to +70°C and 2.8–4.2 V supply range without recalibration.

Use Scenario: Low-power environmental sensor node logging temperature/humidity every 5 seconds using coin-cell battery.

IC Role / Device Role / Timing Role: Precision reference for SAR ADC and internal LDO feedback divider.

Use Value: Draws only 15 µA quiescent current while delivering 2.5 V ±1 mV stability, extending battery life beyond 2 years.

Calibration Equipment

Medical Vital Sign Monitors

Use Scenario: Benchtop calibration source generating traceable 2.5 V outputs for field instrument verification.

IC Role / Device Role / Timing Role: Primary reference in programmable voltage source with 0.1 ppm/°C thermal management.

Use Value: Delivers 30 ppm/°C TC and <1 µV p-p noise, meeting ISO/IEC 17025 metrology-grade requirements.

Use Scenario: Portable ECG module requiring low-noise, low-drift reference for analog front-end amplification and filtering.

IC Role / Device Role / Timing Role: Reference for instrumentation amplifier gain-setting and ADC conversion reference.

Use Value: 60 µV_rms noise and <10 µs settling ensure clean acquisition of sub-mV cardiac signals without baseline wander.

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	2.495 V nominal, adjustable via resistive divider; 20 ppm/°C TC; requires ≥1 mA cathode current	Used where programmable reference or higher current drive is needed; not suitable for <100 µA systems	Select if adjustable output or >1 mA load current is required; avoid for ultra-low-power designs
LM4040C25IDBZR	2.500 V fixed, ±0.5% tolerance, 100 ppm/°C TC, 65 µA min operating current	Higher knee current limits use in sub-100 µA sleep modes; lower cost in high-volume production	Choose for cost-sensitive industrial sensors where 100 ppm/°C TC is acceptable and sleep current >65 µA

Compared with TL431ACDBVR and LM4040C25IDBZR, the ZRC250R01 uniquely supports 13 µA minimum current and 30 ppm/°C TC in a TO92-compatible package-critical for long-life battery instruments needing both precision and micropower operation.

Availability

ZRC250R01 is available at Aetrix Electronics and suitable for battery-powered multimeters, portable data loggers, calibration equipment, and medical vital sign monitors requiring stable component supply with guaranteed long-term continuity.

Supply support for ZRC250R01 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

Zetex Semiconductors, acquired by Diodes Incorporated in 2008, specialized in high-performance analog and discrete semiconductors for precision, power, and interface applications.

The ZRC250 series was developed specifically for micropower shunt references in portable and battery-critical instrumentation, emphasizing low knee current, capacitor-free stability, and robust transient immunity.

FAQ

Is ZRC250R01 a two-terminal or three-terminal device?

ZRC250R01 is functionally a two-terminal shunt voltage reference (anode and cathode), despite its 3-pin E-Line (TO92-style) package. Pin 3 is either unconnected or internally bonded to Pin 1 per datasheet revision - no third electrical function is defined or required in circuit design.

Can ZRC250R01 operate below 20 µA?

Yes - the datasheet specifies a minimum operating current of 13 µA (typical knee current), and stable 2.5 V output is maintained down to this level. Operation below 13 µA results in degraded regulation and increased TC uncertainty, but 15 µA is routinely used in validated low-power designs.

What is the maximum capacitive load ZRC250R01 can drive directly?

ZRC250R01 is stable with capacitive loads up to 10 µF without external compensation, as confirmed by transient response testing and layout-independent evaluation in the original datasheet. This eliminates need for series isolation resistors when buffering ADC inputs or op-amp stages.

Does ZRC250R01 require derating at elevated temperatures?

Yes - power dissipation must be derated above 25°C ambient. For the E-Line (R-suffix) package, maximum power is 500 mW at 25°C, decreasing linearly to zero at 150°C junction temperature. At 85°C ambient, usable power is reduced to ~350 mW, limiting max current to ~140 mA at 2.5 V drop.

ZRC250R01 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)

ZRC250R01 FAQ

1.How can I place an order for ZRC250R01 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC250R01 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 ZRC250R01 reliable?

The price and inventory of ZRC250R01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC250R01 is usually 5 days.

3.What payment methods are accepted for ZRC250R01?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC250R01 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC250R01?

ZRC250R01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC250R01 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 ZRC250R01?

For technical support, including ZRC250R01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC250R01 requirements.

6.How does Aetrix verify that ZRC250R01 is sourced from the original manufacturer or authorized distributors?

All ZRC250R01 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 ZRC250R01 meets industry standards.

7.What is the process for return or replacement of ZRC250R01?

All ZRC250R01 units undergo pre-shipment inspection (PSI). If there is an issue with ZRC250R01, 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 ZRC250R01 part is unused and in its original packaging.

Return procedure for ZRC250R01:

1.Submit a request within 90 days.

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

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