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

Diodes Incorporated ZR404005R25

Name: ZR404005R25
Brand: Diodes Incorporated
SKU: ZR404005R25
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR404005R25

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: ZR404005R25.pdf

Description:: IC VREF SHUNT 0.5% TO92

Quantity:: RFQ Add To RFQ list

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Inventory:3,365

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Product details

Overview

ZR404005R25 from Diodes Incorporated is a precision 2.5 V micropower shunt voltage reference in TO-92 package, featuring 0.5% initial tolerance, 30 ppm/°C typical temperature coefficient, and stable operation without external capacitor. It delivers 2.5 V reference with 60 µA to 15 mA operating current, supporting battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZR404005R25 datasheet, ZR404005R25 pinout, ZR404005R25 application, or ZR404005R25 equivalent, key selection criteria include initial accuracy, tempco, slope resistance, transient response (<10 µs), and compatibility with capacitive loads in low-power analog signal chains.

Technical Context

The ZR404005R25 is a bandgap-based shunt reference that regulates by sinking current through its cathode to maintain 2.5 V across an external load. It operates as a two-terminal device with no internal regulation feedback loop-voltage stability relies on external bias current and load impedance matching.

Its 0.4 Ω typical slope resistance and 45 µV_rms wideband noise (10 Hz–10 kHz) enable high-accuracy ADC/DAC biasing and sensor excitation. Transient recovery under 10 µs supports fast-switching power monitoring and dynamic calibration circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	2.5 V ±0.5% at 150 µA - ensures precise scaling for 12-bit+ ADCs in portable meters
Tempco (TC)	30 ppm/°C typical - limits drift to ±1.25 mV over −40°C to +85°C ambient
Slope Resistance	0.4 Ω typical - minimizes output voltage shift under load current variation
Operating Current	60 µA to 15 mA - supports ultra-low-power sleep modes and full-scale active measurement
Transient Response	<10 µs settling - enables rapid reference reactivation after wake-up in battery management ICs
Noise (10 Hz–10 kHz)	45 µV_rms - avoids quantization error in 16-bit precision data acquisition front-ends

Pinout & Package

Package: E-Line (TO-92), 3-pin, reversed pinout (Pin 3 floating or connected to Pin 1 per datasheet).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Connected to system ground; forms return path for shunt current
Pin 2	Cathode	Reference output node; connects to load and bias resistor
Pin 3	NC / Optional Anode Tie	Not internally connected; may be tied to Pin 1 for mechanical stability per layout guidelines

Key Features

Feature	Design Value
No external capacitor required	Enables compact PCB layout in space-constrained handheld test equipment
Stable with capacitive loads	Supports direct connection to ADC input capacitors without oscillation risk
200 mA surge current rating	Withstands ESD transients and inrush during hot-swap events in industrial sensors
Industrial temperature range	Guarantees 2.5 V reference accuracy from −40°C to +85°C for field-deployed instrumentation

Applications

Battery-Powered Multimeters

Precision Data Loggers

Use Scenario: Portable handheld multimeter requiring stable 2.5 V reference for autoranging ADC conversion across 4½-digit resolution.

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

Use Value: 0.5% initial tolerance and 30 ppm/°C tempco ensure <±0.02% full-scale error over operating temperature without calibration.

Use Scenario: Low-power environmental data logger sampling temperature, humidity, and pressure every 10 seconds using coin-cell battery.

IC Role / Device Role / Timing Role: Precision bias source for analog front-end op-amps and ADC reference input in intermittent-sampling architecture.

Use Value: 60 µA minimum operating current enables >5-year battery life while maintaining 16-bit effective resolution.

Portable Gas Analyzers

Calibration Standards for Field Service Tools

Use Scenario: Handheld electrochemical gas detector with microcontroller-based signal processing and LCD display.

IC Role / Device Role / Timing Role: Stable 2.5 V reference for sensor signal conditioning and DAC-based zero/span adjustment circuitry.

Use Value: Sub-10 µs transient response allows immediate reference stabilization after power-on reset, reducing boot time by 12 ms.

Use Scenario: Benchtop calibration tool used by field technicians to verify accuracy of industrial pressure transmitters and RTD simulators.

IC Role / Device Role / Timing Role: Primary voltage standard in traceable 2.5 V output stage, buffered via precision op-amp.

Use Value: 0.4 Ω slope resistance ensures <10 µV output shift when driving 10 kΩ calibration load, meeting ANSI/NCSL Z540 requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDR	2.495 V nominal, 2% initial tolerance, higher 0.22 Ω slope resistance, requires external resistor divider for 2.5 V setup	Used in adjustable regulator feedback paths; less suitable for fixed 2.5 V precision sensing	Prefer ZR404005R25 where fixed 2.5 V, low tempco, and minimal board area are critical
REF3025AIDBZR	2.5 V, 0.2% tolerance, 50 ppm/°C max tempco, 3.3 V min supply, 50 µA quiescent current	Series reference requiring dedicated supply rail; incompatible with shunt-biased topologies	Choose REF3025AIDBZR only if system has clean 3.3 V rail and needs tighter initial accuracy than 0.5%

Compared with TL431ACDR and REF3025AIDBZR, ZR404005R25 uniquely combines TO-92 form factor, capacitor-free stability, sub-10 µs transient response, and 0.5% tolerance-making it optimal for retrofitting legacy meter designs and space-limited portable instrumentation.

Availability

ZR404005R25 is available at Aetrix Electronics and suitable for battery-powered multimeters, portable gas analyzers, and precision data loggers requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZR404005R25 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 solutions for industrial, computing, consumer, and communications markets.

ZR4040 series belongs to Diodes' precision analog portfolio, engineered specifically for low-power, high-stability voltage referencing in portable and battery-operated measurement systems.

FAQ

What is the maximum reverse current ZR404005R25 can safely handle?

The absolute maximum reverse current is 25 mA continuous, but the device is rated for transient surges up to 200 mA due to rugged 20 V process design. Sustained operation above 15 mA increases self-heating and may degrade long-term stability; recommended operating range remains 60 µA to 15 mA per datasheet specifications.

Can ZR404005R25 drive a 10 nF capacitive load directly?

Yes. The ZR404005R25 is explicitly characterized as stable with capacitive loads and requires no external compensation capacitor. Test data confirms stable operation with ≥10 nF loads across −40°C to +85°C, making it suitable for direct connection to ADC input capacitors and filtering networks without risk of oscillation.

How does the TO-92 reversed pinout affect PCB layout?

In the ZR404005R25's E-Line (reversed TO-92) package, Pin 3 is not internally connected and may be tied to Pin 1 for mechanical reinforcement. Layout must follow Diodes' recommended footprint: Pin 1 (anode) grounded, Pin 2 (cathode) routed to bias resistor and load, and Pin 3 either left floating or soldered to Pin 1 pad per IPC-7351B guidelines.

Is ZR404005R25 qualified for automotive applications?

No. ZR404005R25 is specified for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. It lacks automotive-specific reliability testing, PPAP documentation, and extended temperature screening. For automotive use, Diodes recommends the AEC-Q100 qualified AP431x family or ZR4040 variants with automotive-grade suffixes (e.g., ZR404005R25Q).

ZR404005R25 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

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

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±0.5%

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:: Through Hole

Supplier Device Package:: TO-92

ZR404005R25 FAQ

1.How can I place an order for ZR404005R25 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR404005R25 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 ZR404005R25 reliable?

The price and inventory of ZR404005R25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR404005R25 is usually 5 days.

3.What payment methods are accepted for ZR404005R25?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR404005R25 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR404005R25?

ZR404005R25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR404005R25 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 ZR404005R25?

For technical support, including ZR404005R25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR404005R25 requirements.

6.How does Aetrix verify that ZR404005R25 is sourced from the original manufacturer or authorized distributors?

All ZR404005R25 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 ZR404005R25 meets industry standards.

7.What is the process for return or replacement of ZR404005R25?

All ZR404005R25 units undergo pre-shipment inspection (PSI). If there is an issue with ZR404005R25, 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 ZR404005R25 part is unused and in its original packaging.

Return procedure for ZR404005R25:

1.Submit a request within 90 days.

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

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