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

Diodes Incorporated ZR404005F25TA

Name: ZR404005F25TA
Brand: Diodes Incorporated
SKU: ZR404005F25TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR404005F25TA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZR404005F25TA.pdf

Description:: IC VREF SHUNT 0.5% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:2,336

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Product details

Overview

ZR404005F25TA from Diodes Incorporated is a precision micropower 2.5 V bandgap voltage reference in SOT23-3 package, with 0.5% initial tolerance, 30 ppm/°C typical temperature coefficient, and stable operation from 60 µA to 15 mA. It requires no external capacitor, supports capacitive loads, and achieves stable output in <10 µs-ideal for battery-powered instrumentation and portable data acquisition.

For engineers reviewing the ZR404005F25TA datasheet, ZR404005F25TA pinout, ZR404005F25TA application, or ZR404005F25TA equivalent, key selection criteria include initial accuracy, thermal drift, low-quiescent-current stability, transient response time, and SOT23-3 footprint compatibility in space-constrained analog signal chains.

Technical Context

The ZR404005F25TA implements a two-terminal shunt topology with bandgap-derived reference core, operating as a precision reverse-biased Zener-like device. Its internal architecture eliminates need for external stabilization capacitance while maintaining stability across load capacitance up to 1 µF and supply transients.

It delivers specified performance over −40°C to +85°C with guaranteed 0.5% initial voltage accuracy at 150 µA test current, and maintains slope resistance ≤0.4 Ω (typ) and wideband noise of 45 µV_rms (10 Hz–10 kHz), enabling high-resolution ADC biasing and sensor excitation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_R (Reverse Breakdown)	2.500 V ±0.5% at I_R = 150 µA - defines absolute reference accuracy for calibration-critical circuits
Tempco (TC)	30 ppm/°C typical - ensures ≤±0.75 mV drift over −40°C to +85°C for stable sensor front-ends
Slope Resistance (R_S)	0.4 Ω typical - minimizes output voltage shift under varying load current (e.g., 0.4 mV per 1 mA change)
Operating Current Range	60 µA to 15 mA - supports ultra-low-power sleep modes and higher-drive precision power supplies
Transient Response	Stable in <10 µs - enables fast wake-up and dynamic reference settling in multiplexed DAQ systems
Wideband Noise	45 µV_rms (10 Hz–10 kHz) - suitable for 16-bit+ SAR ADC reference without additional filtering
Capacitive Load Stability	Stable with ≥0 pF to 1 µF - allows direct connection to ADC input caps or long PCB traces without oscillation

Pinout & Package

SOT23-3 package (suffix "F"), top view: Pin 1 floating or internally connected to Pin 2; Pin 2 = Cathode (output); Pin 3 = Anode (ground). Thermal pad not present; standard JEDEC MO-178 compliant outline.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	NC or Cathode Tie	Internally tied to Pin 2 in most units; left unconnected or paralleled to Pin 2 for improved thermal symmetry
Pin 2	Cathode / Output	Provides regulated 2.5 V reference voltage; connects to load and feedback node in shunt configuration
Pin 3	Anode / Ground	Reference return path; must be low-impedance to system ground to maintain accuracy and noise immunity

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference design in tight layouts; eliminates capacitor aging, leakage, and ESR-related drift
0.5% initial tolerance	Reduces or eliminates post-manufacturing trimming in production test for portable medical and metering devices
30 ppm/°C tempco	Meets Class A accuracy requirements for industrial temperature sensors and RTD bridges without active compensation
<10 µs transient response	Supports rapid channel switching in multi-sensor data loggers without reference settling delay penalties
Stable with capacitive loads up to 1 µF	Permits direct interface to switched-capacitor filters, sample-hold amplifiers, and high-C ADC inputs

Applications

Battery-Powered Portable Meters

Precision Data Acquisition Systems

Use Scenario: Handheld multimeters and clamp meters operating on coin-cell or AA batteries with intermittent measurement cycles.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.5 V for ADC reference and analog front-end biasing.

Use Value: 60 µA minimum operating current extends battery life >1 year; 0.5% tolerance avoids factory calibration per unit.

Use Scenario: 16-bit isolated DAQ modules acquiring thermocouple, strain gauge, and voltage signals in industrial PLC racks.

IC Role / Device Role / Timing Role: Primary reference source for successive-approximation ADC and programmable gain instrumentation amplifier.

Use Value: 45 µV_rms noise and <10 µs settling enable full-resolution sampling at 100 kSPS without reference-related distortion.

Portable Medical Sensors

Calibration-Grade Test Equipment

Use Scenario: Wearable ECG and pulse oximetry monitors requiring low-power, low-noise analog signal conditioning.

IC Role / Device Role / Timing Role: Reference for low-noise op-amp stages and ADC in analog signal chain.

Use Value: 30 ppm/°C tempco ensures <±1 LSB error over body-worn temperature range; SOT23-3 fits compact flex PCBs.

Use Scenario: Benchtop multimeters and calibration sources needing traceable, stable DC reference outputs.

IC Role / Device Role / Timing Role: Secondary reference in self-calibrating architectures, backed by primary standards.

Use Value: 0.5% initial accuracy and 0.4 Ω slope resistance allow predictable error budgeting; TO-92 and SOT23 variants support multiple form factors.

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	3-terminal adjustable shunt reference; 2.495 V nominal; 2% initial tolerance; requires external resistor divider	Used where programmable output or higher current (>100 mA) capability is needed	Select when adjustable output or higher sink current is required; not drop-in for fixed 2.5 V use
REF3025AIDBZR	Series reference; 2.5 V fixed; 0.2% initial tolerance; 50 ppm/°C max; 50 µA quiescent current	Preferred in low-noise, high-PSRR applications where load regulation and supply rejection matter	Select for series topology benefits (no cathode-to-ground path); requires input headroom and decoupling

Compared with TL431ACDBVR and REF3025AIDBZR, the ZR404005F25TA offers lowest board area, simplest 2-pin implementation, and best trade-off of micro-power operation, fixed 2.5 V accuracy, and capacitive-load robustness-making it optimal for cost- and space-sensitive shunt reference roles.

Availability

ZR404005F25TA is available at Aetrix Electronics and suitable for battery-powered portable meters, precision data acquisition systems, and portable medical sensors requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZR404005F25TA 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 ICs for power management, signal integrity, and protection applications.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered for low-power, high-accuracy analog systems where size, stability, and ease of use are critical-especially in portable, battery-operated, and industrial measurement equipment.

FAQ

What is the maximum capacitive load the ZR404005F25TA can drive without instability?

The ZR404005F25TA is specified stable with capacitive loads from 0 pF up to at least 1 µF, as confirmed in its typical characteristics curves and application notes. This eliminates need for series isolation resistors in ADC reference connections or sensor signal conditioning paths, even with long PCB traces or large input capacitance.

Can the ZR404005F25TA operate below 60 µA?

No-the datasheet specifies 60 µA as the minimum operating current for guaranteed electrical performance including accuracy and tempco. Operation below this may result in increased voltage drift, higher noise, or failure to regulate; it is not characterized or recommended for design-in.

Is Pin 1 of the SOT23-3 package electrically functional or optional?

Pin 1 is internally floating or tied to Pin 2 (cathode) depending on wafer lot; it is not an independent terminal. Diodes Incorporated recommends leaving Pin 1 unconnected or connecting it to Pin 2 to improve thermal symmetry-no circuit functionality depends on Pin 1 being used or unused.

How does the ZR404005F25TA compare to Zener diodes in terms of temperature stability?

Unlike conventional Zeners, the ZR404005F25TA uses a bandgap-based core yielding 30 ppm/°C typical tempco-up to 10× better than standard 2.5 V Zeners (typically 100–200 ppm/°C). This results in <±0.75 mV drift over −40°C to +85°C versus >±2 mV for Zener alternatives, directly improving measurement repeatability.

ZR404005F25TA 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:: ±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:: Surface Mount

Supplier Device Package:: SOT-23-3

ZR404005F25TA FAQ

1.How can I place an order for ZR404005F25TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR404005F25TA 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 ZR404005F25TA reliable?

The price and inventory of ZR404005F25TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR404005F25TA is usually 5 days.

3.What payment methods are accepted for ZR404005F25TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR404005F25TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR404005F25TA?

ZR404005F25TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR404005F25TA 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 ZR404005F25TA?

For technical support, including ZR404005F25TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR404005F25TA requirements.

6.How does Aetrix verify that ZR404005F25TA is sourced from the original manufacturer or authorized distributors?

All ZR404005F25TA 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 ZR404005F25TA meets industry standards.

7.What is the process for return or replacement of ZR404005F25TA?

All ZR404005F25TA units undergo pre-shipment inspection (PSI). If there is an issue with ZR404005F25TA, 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 ZR404005F25TA part is unused and in its original packaging.

Return procedure for ZR404005F25TA:

1.Submit a request within 90 days.

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

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