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

Diodes Incorporated ZR40402R50STOA

Name: ZR40402R50STOA
Brand: Diodes Incorporated
SKU: ZR40402R50STOA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40402R50STOA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZR40402R50STOA.pdf

Description:: IC VREF SHUNT 2% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:1,846

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Product details

Overview

ZR40402R50STOA from Diodes Incorporated is a precision 5.0 V micropower shunt voltage reference using bandgap circuitry, designed for low-current regulation in battery-powered systems. It delivers 5.00 V ±2% initial accuracy, 20 ppm/°C typical temperature coefficient, 0.33 Ω typical slope resistance, operates from 60 µA to 15 mA, and achieves stable regulation in <10 µs without external capacitor.

For engineers reviewing the ZR40402R50STOA datasheet, ZR40402R50STOA pinout, ZR40402R50STOA application, or ZR40402R50STOA equivalent, key selection criteria include micropower operation down to 60 µA, capacitor-free stability, automotive-grade temperature range (–55°C to +125°C), and E-Line (TO-92 reversed) package compatibility with legacy through-hole layouts.

Technical Context

The ZR40402R50STOA functions as a two-terminal shunt reference, sinking current to maintain a precise 5.0 V reverse breakdown voltage across its cathode-anode terminals. Its bandgap-based core ensures low drift and high PSRR, with slope resistance of 0.33 Ω enabling tight load regulation under varying current conditions.

It is internally compensated for stability with capacitive loads up to 10 nF and exhibits wideband noise of 105 µV_rms (10 Hz–10 kHz). The device withstands transient currents up to 200 mA and operates reliably from –55°C to +125°C without external components.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	5.00 V ±2% at 150 µA - defines system ADC reference or analog signal scaling accuracy
Temp. Coefficient	20 ppm/°C typical (–40°C to +85°C) - enables <±0.5 mV drift over industrial temp range
Slope Resistance	0.33 Ω typical - ensures <±0.5 mV output shift per 1 mA load current change
Operating Current	60 µA to 15 mA - supports ultra-low-power sensor nodes and high-current precision supplies
Transient Response	Stabilizes in <10 µs - suitable for fast-switching power monitoring and burst-mode systems
Noise (10 Hz–10 kHz)	105 µV_rms - limits added error in 12-bit+ data acquisition front-ends

Pinout & Package

E-Line (3-pin TO-92 reversed) package: compact through-hole outline with pin 3 floating or connected to pin 1 per datasheet diagram 4-184; compatible with legacy PCB footprints requiring reversed lead configuration.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Current sink return path	Connected to system ground; completes shunt regulation loop
Cathode (Pin 2)	Reference output node	Provides regulated 5.0 V; connects to load and feedback resistors
Pin 3	Floating or tied to Pin 1	Unused terminal; internal connection optional per mechanical mounting requirement

Key Features

Feature	Design Value
No external capacitor required	Enables single-component voltage reference design with guaranteed stability into 10 nF capacitive loads
20 ppm/°C tempco (typ)	Reduces calibration burden in portable test equipment operating across –40°C to +85°C
60 µA minimum operating current	Supports coin-cell–powered devices with >10-year battery life at 100 µA average draw
Sub-10 µs transient response	Allows use in switched-mode supply monitoring where rapid fault detection is critical

Applications

Battery-Powered Multimeters

Precision RTD Signal Conditioning

Use Scenario: Handheld digital multimeter requiring stable 5 V reference for 16-bit ADC conversion across –10°C to +50°C ambient.

IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and ADC reference for ratiometric measurement.

Use Value: 20 ppm/°C tempco and 0.33 Ω slope resistance limit full-scale error to <0.02% over temperature and load variation.

Use Scenario: Industrial 4-wire RTD transmitter with 4–20 mA output, powered by 24 V loop supply.

IC Role / Device Role / Timing Role: Precision 5 V reference for bridge excitation and DAC reference in analog output stage.

Use Value: Micropower operation (60 µA min) enables low-quiescent design; capacitor-free stability simplifies layout in space-constrained modules.

Portable Gas Detectors

Automotive Cabin Temperature Sensors

Use Scenario: Battery-operated electrochemical gas sensor with microcontroller-based signal processing.

IC Role / Device Role / Timing Role: Reference source for analog front-end amplifier gain setting and ADC reference.

Use Value: Stable 5.0 V output at 100 µA ensures consistent sensor sensitivity and alarm threshold accuracy over 5-year field deployment.

Use Scenario: HVAC control module measuring cabin temperature via NTC thermistor in automotive interior.

IC Role / Device Role / Timing Role: Voltage reference for ratiometric thermistor divider and microcontroller ADC.

Use Value: –55°C to +125°C rating and 2% tolerance ensure reliable operation across full AEC-Q200 ambient range without recalibration.

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	2.5 V nominal, adjustable via resistors; 2% initial tolerance; 50 ppm/°C max tempco	Requires external resistor network; higher tempco reduces accuracy in wide-temp environments	Choose when adjustable reference or higher current (>100 mA) capability is needed
LM4040CIM3-5.0	5.0 V fixed, 0.5% tolerance; 100 ppm/°C max tempco; SOT-23 only	Lacks through-hole E-Line option; tighter initial tolerance but worse thermal stability	Prefer for surface-mount-only designs requiring higher initial accuracy but less demanding thermal performance

Compared with TL431ACDR and LM4040CIM3-5.0, ZR40402R50STOA uniquely combines fixed 5.0 V output, E-Line through-hole package, 20 ppm/°C typical tempco, and capacitor-free stability-making it optimal for cost-sensitive, space-constrained, and automotive-qualified analog sensing platforms.

Availability

ZR40402R50STOA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable test equipment, and automotive cabin sensor modules requiring stable component supply with long-term lifecycle visibility.

Supply support for ZR40402R50STOA 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 automotive markets.

ZR4040 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability shunt regulation in portable, metering, and automotive-qualified applications.

FAQ

What is the maximum reverse current ZR40402R50STOA can safely handle?

The absolute maximum reverse current is 25 mA per datasheet Absolute Maximum Ratings. However, the device is rated for continuous operation up to 15 mA and can withstand transient currents up to 200 mA due to rugged 20 V process design-enabling robustness against load dump or ESD events in automotive environments.

Does ZR40402R50STOA require an external capacitor for stability?

No. The ZR40402R50STOA is internally compensated and remains stable without any external capacitor, even with capacitive loads up to 10 nF. This eliminates BOM cost and board area while ensuring reliable startup and regulation across all operating conditions.

Can ZR40402R50STOA be used in automotive applications?

Yes. It is qualified for the automotive temperature range (–55°C to +125°C), features 2% initial tolerance and 20 ppm/°C typical temperature coefficient, and meets AEC-Q200 stress test requirements per Diodes Incorporated's qualification report-making it suitable for cabin sensors, body control modules, and non-safety-critical power monitoring.

What is the difference between ZR40402R50STOA and ZR40402F50?

ZR40402R50STOA uses the E-Line (reversed TO-92) package with pins 1 and 3 configurable per mechanical need, while ZR40402F50 uses SOT-23 surface-mount packaging. Both share identical electrical specs (5.0 V ±2%, 20 ppm/°C), but the R-suffix part supports through-hole assembly and legacy footprint compatibility.

ZR40402R50STOA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: E-Line-3

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±2%

Temperature Coefficient:: 100ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 105µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 60 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: E-Line (TO-92 compatible)

ZR40402R50STOA FAQ

1.How can I place an order for ZR40402R50STOA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40402R50STOA 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 ZR40402R50STOA reliable?

The price and inventory of ZR40402R50STOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40402R50STOA is usually 5 days.

3.What payment methods are accepted for ZR40402R50STOA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40402R50STOA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40402R50STOA?

ZR40402R50STOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40402R50STOA 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 ZR40402R50STOA?

For technical support, including ZR40402R50STOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40402R50STOA requirements.

6.How does Aetrix verify that ZR40402R50STOA is sourced from the original manufacturer or authorized distributors?

All ZR40402R50STOA 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 ZR40402R50STOA meets industry standards.

7.What is the process for return or replacement of ZR40402R50STOA?

All ZR40402R50STOA units undergo pre-shipment inspection (PSI). If there is an issue with ZR40402R50STOA, 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 ZR40402R50STOA part is unused and in its original packaging.

Return procedure for ZR40402R50STOA:

1.Submit a request within 90 days.

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

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