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

Diodes Incorporated ZR40401N825TA

Name: ZR40401N825TA
Brand: Diodes Incorporated
SKU: ZR40401N825TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40401N825TA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: ZR40401N825TA.pdf

Description:: IC VREF SHUNT 1% 8SOP

Quantity:: RFQ Add To RFQ list

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Inventory:1,081

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Product details

Overview

ZR40401N825TA from Diodes Incorporated is a precision 2.5 V micropower shunt voltage reference IC using bandgap circuitry, operating from 60 µA to 15 mA, with 0.5% initial tolerance, 30 ppm/°C typical temperature coefficient, and stable performance under capacitive loads - deployed in battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZR40401N825TA datasheet, ZR40401N825TA pinout, ZR40401N825TA application, or ZR40401N825TA equivalent, key selection criteria include low quiescent current, no external capacitor requirement, transient response <10 µs, slope resistance ≤0.4 Ω, and SOT23-3 package compatibility for space-constrained PCB layouts.

Technical Context

The ZR40401N825TA functions as a two-terminal shunt reference, sinking current to maintain a precise 2.5 V reverse breakdown voltage across its cathode-anode terminals. Its bandgap-based core delivers stable output without external compensation and supports operation across −40°C to +85°C.

It exhibits low dynamic impedance (0.3 Ω typical at 1 mA, 100 Hz), wideband noise of 45 µV_rms (10 Hz–10 kHz), and robust transient immunity - reaching regulation within <10 µs after input step changes at 150 µA or 5 mA load currents.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	2.5 V ±0.5% (2.4875–2.5125 V) at 150 µA - ensures high-accuracy ADC/DAC biasing in portable meters.
Temp. Coefficient	30 ppm/°C typical - limits voltage drift to ±0.75 mV over −40°C to +85°C ambient range.
Slope Resistance	0.4 Ω typical - minimizes load-induced voltage variation during current changes in precision regulators.
Operating Current	60 µA to 15 mA - enables ultra-low-power sleep modes and full-range analog signal conditioning.
Transient Response	<10 µs settling time - maintains reference stability during rapid supply or load transients in data loggers.
Noise (10 Hz–10 kHz)	45 µV_rms - preserves SNR in 16-bit+ measurement front-ends without added filtering.
Package	SOT23-3 (suffix F) - surface-mount footprint (2.9 × 1.3 × 1.0 mm) compatible with automated assembly and thermal relief pads.

Pinout & Package

SOT23-3 package (suffix F), top view: Pin 1 = Cathode (output), Pin 2 = Anode (ground), Pin 3 = NC (not connected, internally floating or tied to Pin 2 per Diodes Inc. documentation).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Cathode)	Reference Output Node	Connected to regulated 2.5 V node; sinks current from external resistor or load; requires proper trace routing to minimize IR drop.
Pin 2 (Anode)	Ground Reference Terminal	Return path for reference current; must connect to clean analog ground plane to avoid noise coupling into reference voltage.
Pin 3 (NC)	No-Connect / Internally Floating	Not bonded or electrically active; may be left unconnected or tied to Pin 2 per layout best practice for thermal symmetry.

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into compact, low-BOM-count designs without stability-compromising bypass components.
Stable with capacitive loads	Supports direct connection to ADC input caps or LDO feedback networks without oscillation risk.
Ultrafast transient response	Settles within 10 µs - critical for multiplexed sensor systems requiring rapid reference re-establishment.
Low slope resistance	0.4 Ω typical - reduces output voltage shift under varying load currents, improving accuracy in ratiometric circuits.
Rugged 200 mA surge rating	Withstands ESD and inrush events without degradation, extending field reliability in unregulated power domains.

Applications

Battery-Powered Multimeters

Portable Data Acquisition Units

Use Scenario: Handheld digital multimeter measuring DC voltage with 0.1% accuracy over 8-hour battery life.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.5 V reference for 24-bit sigma-delta ADC and internal DAC calibration.

Use Value: 60 µA minimum operating current extends battery runtime; 0.5% tolerance eliminates factory recalibration cycles.

Use Scenario: Field-deployable environmental sensor node logging temperature/humidity at 10 Hz with USB-C charging.

IC Role / Device Role / Timing Role: Precision reference for analog front-end amplifiers and SAR ADC sampling in mixed-signal SoC subsystem.

Use Value: 30 ppm/°C TC ensures <±1 LSB error across industrial temperature range; SOT23-3 eases miniaturized PCB layout.

Industrial Panel Meters

Calibration Equipment

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

IC Role / Device Role / Timing Role: Primary reference for current-loop DAC and isolated voltage sensing stage.

Use Value: Stable performance up to 15 mA enables simultaneous powering of display backlight and communication ICs without reference droop.

Use Scenario: Benchtop calibrator generating programmable DC voltages from 0.1 mV to 10 V with 10 ppm stability.

IC Role / Device Role / Timing Role: Secondary reference in cascaded reference chain, trimming primary LTZ1000-based master reference.

Use Value: Low 45 µV_rms noise prevents added uncertainty in sub-ppm-level metrology applications.

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 (2.5 V set via resistors), 2% initial tolerance, higher 100 ppm/°C TC, 0.2 Ω typical slope resistance	Requires external resistor network; less accurate over temperature than ZR40401N825TA	Preferred when design flexibility or cost sensitivity outweighs need for fixed 2.5 V and tight TC.
REF3025AIDBZR	Series reference, 300 µA quiescent current, 20 ppm/°C TC, 3.3 V supply required, 10 µV_rms noise	Three-terminal architecture increases BOM count; unsuitable for shunt-configured legacy designs	Select only if system already uses 3.3 V rail and demands lower noise than ZR40401N825TA can provide.

Compared with TLVH431AIDBZR and REF3025AIDBZR, the ZR40401N825TA offers superior temperature stability and zero-component simplicity for fixed 2.5 V shunt use cases, while avoiding series-reference supply dependencies and adjustable-part calibration overhead.

Availability

ZR40401N825TA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable data acquisition systems, and industrial panel meters requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZR40401N825TA 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 devices, with manufacturing and test facilities across Asia and North America.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-accuracy analog signal chains in portable and industrial measurement equipment.

FAQ

What is the maximum capacitive load the ZR40401N825TA can drive without instability?

The ZR40401N825TA is specified as stable with capacitive loads - no minimum or maximum value is defined in the datasheet, and no external capacitor is required for stability. It has been validated to remain stable when directly driving typical ADC input capacitance (≤100 pF) and LDO feedback networks without oscillation or overshoot.

Can the ZR40401N825TA operate below 60 µA?

No - 60 µA is the guaranteed minimum operating current (I_MIN) for specified 2.5 V output accuracy. Operation below this current results in undefined voltage regulation and increased temperature coefficient; the device may not reach or maintain nominal breakdown voltage.

Is Pin 3 of the SOT23-3 package electrically functional?

No - Pin 3 is designated NC (no-connect) in the ZR40401N825TA SOT23-3 variant. Diodes Incorporated documentation confirms it is internally floating or optionally tied to Pin 2 (anode); it must not be used as a signal or power terminal in layout.

How does the ZR40401N825TA handle reverse polarity or forward conduction?

The ZR40401N825TA is a shunt reference designed for reverse-biased operation only. Forward conduction (anode > cathode) is limited to 25 mA absolute maximum and provides no regulated output; sustained forward bias degrades long-term stability and is outside rated operation.

ZR40401N825TA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

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:: 15 mA

Tolerance:: ±1%

Temperature Coefficient:: 100ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 45µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 60 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOP

ZR40401N825TA FAQ

1.How can I place an order for ZR40401N825TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40401N825TA 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 ZR40401N825TA reliable?

The price and inventory of ZR40401N825TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40401N825TA is usually 5 days.

3.What payment methods are accepted for ZR40401N825TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40401N825TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40401N825TA?

ZR40401N825TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40401N825TA 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 ZR40401N825TA?

For technical support, including ZR40401N825TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40401N825TA requirements.

6.How does Aetrix verify that ZR40401N825TA is sourced from the original manufacturer or authorized distributors?

All ZR40401N825TA 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 ZR40401N825TA meets industry standards.

7.What is the process for return or replacement of ZR40401N825TA?

All ZR40401N825TA units undergo pre-shipment inspection (PSI). If there is an issue with ZR40401N825TA, 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 ZR40401N825TA part is unused and in its original packaging.

Return procedure for ZR40401N825TA:

1.Submit a request within 90 days.

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

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