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

Diodes Incorporated ZR40401F25TA

Name: ZR40401F25TA
Brand: Diodes Incorporated
SKU: ZR40401F25TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40401F25TA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZR40401F25TA.pdf

Description:: IC VREF SHUNT 1% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,274

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Product details

Overview

ZR40401F25TA from Diodes Incorporated is a precision 2.5 V micropower shunt voltage reference in SOT23-3 package, featuring 1% initial tolerance, 30 ppm/°C typical temperature coefficient, 0.4 Ω typical slope resistance, stable operation from 60 µA to 15 mA, and sub-10 µs transient response-used in battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZR40401F25TA datasheet, ZR40401F25TA pinout, ZR40401F25TA application, or ZR40401F25TA equivalent, key selection criteria include low operating current, capacitor-free stability, industrial temperature range (−40°C to +85°C), tight tolerance, and robust transient immunity up to 200 mA surge current.

Technical Context

The ZR40401F25TA is a bandgap-based shunt reference that regulates by sinking current through its cathode to maintain a precise 2.5 V across its terminals. It requires no external stabilization capacitor and remains stable with capacitive loads up to 1 µF.

Its rugged 20 V process enables survival of 200 mA transient currents, while its low 0.4 Ω dynamic impedance ensures minimal output voltage variation under load changes. The device achieves thermal stability via curvature-compensated bandgap design yielding 30 ppm/°C typical TC over −40°C to +85°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.5 V ±1% at 150 µA - tight initial accuracy for calibration-critical circuits
Temp Coefficient	30 ppm/°C typical - ensures ≤±2.5 mV drift over full −40°C to +85°C range
Slope Resistance	0.4 Ω typical - maintains <1 mV output shift per 2.5 mA load change
Operating Current	60 µA to 15 mA - supports ultra-low-power sleep modes and high-accuracy active measurement
Transient Response	<10 µs settling - enables fast wake-up and sampling in duty-cycled systems
Max Surge Current	200 mA - withstands ESD and supply rail transients without damage
Noise (10 Hz–10 kHz)	45 µV_rms - suitable for 16-bit ADC reference without added filtering

Pinout & Package

Package: SOT23-3 (suffix F), surface-mount, 3-pin plastic package with standard footprint and thermal pad compatibility.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference ground return path	Connected to system GND; carries full cathode sink current
Cathode (Pin 2)	Regulated output node	2.5 V reference point; connects to load and feedback networks
NC / Floating (Pin 3)	No internal connection	Unused terminal; electrically isolated per datasheet - must not be tied to any potential

Key Features

Feature	Design Value
Capacitor-free stability	Operates stably with no external bypass capacitor - reduces BOM count and PCB area
Ultra-low minimum current	60 µA start-up threshold - enables use in microamp-level energy harvesting nodes
High transient immunity	Withstands 200 mA surge without latch-up - eliminates need for series current-limiting resistors in noisy environments
Low noise performance	45 µV_rms broadband noise - supports direct coupling to precision SAR and delta-sigma ADCs
Wide operating current range	60 µA to 15 mA dynamic range - accommodates both standby and full-speed operation in same design

Applications

Battery-Powered Multimeters

Portable Gas Analyzers

Use Scenario: Handheld digital multimeter requiring stable 2.5 V reference for 4½-digit ADC conversion across varying battery voltage (2.8–4.2 V).

IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling reference for dual-slope integrator and SAR ADC.

Use Value: 1% initial tolerance and 30 ppm/°C TC ensure <0.02% full-scale error over temperature and battery discharge cycle.

Use Scenario: Compact gas sensor module powered by coin cell, performing periodic electrochemical sensor biasing and analog front-end digitization.

IC Role / Device Role / Timing Role: Precision voltage reference for sensor excitation and ADC reference in ultra-low-duty-cycle sampling architecture.

Use Value: 60 µA minimum operating current enables >5-year shelf life on CR2032; sub-10 µs wake-up supports rapid sensor readout.

Industrial Data Loggers

Medical Patient Monitors

Use Scenario: Remote environmental logger deployed in unregulated enclosures, recording temperature, humidity, and pressure using 16-bit sigma-delta ADCs.

IC Role / Device Role / Timing Role: Primary reference source for multi-channel analog input subsystem, shared across multiplexed sensor signal chains.

Use Value: 0.4 Ω slope resistance minimizes cross-channel crosstalk during channel switching; 45 µV_rms noise preserves ENOB >15.5 bits.

Use Scenario: Portable ECG monitor with lead-off detection, analog front-end gain control, and real-time waveform digitization.

IC Role / Device Role / Timing Role: Stable 2.5 V reference for programmable-gain amplifier biasing and 12-bit ADC conversion.

Use Value: Industrial −40°C to +85°C rating ensures clinical reliability across transport, storage, and bedside use; no external cap simplifies medical-grade layout.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431ACDBVR	Adjustable (2.5 V set via resistors); 2% initial tolerance; 90 ppm/°C TC; requires external resistor network	Used where programmability or cost-driven BOM reduction outweighs fixed-voltage simplicity	Select when reference voltage flexibility or lower unit cost justifies added component count and reduced accuracy
REF3025AIDBZR	Series reference; 0.2% initial tolerance; 50 ppm/°C TC; requires ≥1.5 mA quiescent current; needs output capacitor	Preferred in high-precision, low-noise systems where load regulation and PSRR matter more than quiescent current	Select when absolute accuracy and PSRR >70 dB are critical, and 1.5 mA minimum current is acceptable

Compared with TLVH431ACDBVR and REF3025AIDBZR, the ZR40401F25TA offers superior micropower operation (60 µA min), fixed 2.5 V output without external components, and best-in-class transient immunity-making it optimal for space-constrained, battery-sensitive applications where simplicity and ruggedness are prioritized over programmability or ultra-high accuracy.

Availability

ZR40401F25TA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable test equipment, and industrial data acquisition systems requiring stable component supply with guaranteed long-term availability.

Supply support for ZR40401F25TA 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, specializing in power management, signal integrity, and precision analog solutions for industrial, computing, and consumer markets.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability applications in portable and harsh-environment instrumentation where size, current efficiency, and thermal robustness are critical.

FAQ

Is ZR40401F25TA a shunt or series voltage reference?

ZR40401F25TA is a shunt voltage reference. It operates by sinking current from a higher-voltage supply through an external resistor into its cathode (Pin 2), maintaining a stable 2.5 V between cathode and anode (Pin 1). Its anode connects directly to system ground, and it does not regulate supply voltage like a series reference.

Can ZR40401F25TA drive capacitive loads without oscillation?

Yes. The ZR40401F25TA is internally compensated and stable with capacitive loads up to at least 1 µF, as confirmed in the datasheet's typical characteristics and application notes. No external capacitor is required for stability, making it ideal for compact layouts with local decoupling near ADCs or sensors.

What is the maximum safe reverse current for continuous operation?

The absolute maximum continuous reverse current is 25 mA, but the recommended operating range is 60 µA to 15 mA. Operation above 15 mA increases self-heating and may degrade long-term stability; sustained current above 25 mA risks permanent damage even if within power dissipation limits.

Does Pin 3 (SOT23) require connection or grounding?

No. Pin 3 in the SOT23 package (suffix F) is internally unconnected (NC) and must remain floating. Connecting it to ground, supply, or any other node violates the device's electrical specification and may cause unpredictable behavior or parametric shift. The datasheet explicitly states it is "floating or connected to pin 2" only in alternate configurations-not applicable to ZR40401F25TA.

ZR40401F25TA 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:: 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:: SOT-23-3

ZR40401F25TA FAQ

1.How can I place an order for ZR40401F25TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40401F25TA 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 ZR40401F25TA reliable?

The price and inventory of ZR40401F25TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40401F25TA is usually 5 days.

3.What payment methods are accepted for ZR40401F25TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40401F25TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40401F25TA?

ZR40401F25TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40401F25TA 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 ZR40401F25TA?

For technical support, including ZR40401F25TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40401F25TA requirements.

6.How does Aetrix verify that ZR40401F25TA is sourced from the original manufacturer or authorized distributors?

All ZR40401F25TA 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 ZR40401F25TA meets industry standards.

7.What is the process for return or replacement of ZR40401F25TA?

All ZR40401F25TA units undergo pre-shipment inspection (PSI). If there is an issue with ZR40401F25TA, 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 ZR40401F25TA part is unused and in its original packaging.

Return procedure for ZR40401F25TA:

1.Submit a request within 90 days.

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

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