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

Diodes Incorporated ZR40402R50STZ

Name: ZR40402R50STZ
Brand: Diodes Incorporated
SKU: ZR40402R50STZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40402R50STZ

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZR40402R50STZ.pdf

Description:: IC VREF SHUNT 2% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:4,776

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Product details

Overview

ZR40402R50STZ 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 output in <10 µs without external capacitor - used in portable instrumentation and data acquisition front-ends.

For engineers reviewing the ZR40402R50STZ datasheet, ZR40402R50STZ pinout, ZR40402R50STZ application, or ZR40402R50STZ 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 ZR40402R50STZ functions as a two-terminal shunt reference, sinking current to maintain a precise 5.0 V across its cathode-anode terminals. Its bandgap core ensures low drift and high PSRR, while internal design enables stable regulation under capacitive loads up to 1 µF and transient recovery in under 10 µs.

It operates over –55°C to +125°C with 40 ppm/°C max TC across the full range, supports 25 mA absolute maximum reverse current, and withstands 200 mA surge due to rugged 20 V process technology - making it suitable for harsh-environment sensing nodes and industrial analog signal chains.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.00 V ±2% at 150 µA - sets accurate ADC reference or DAC bias point in low-power systems
Temp Coefficient	20 ppm/°C typical (–40°C to +85°C) - enables <±3 mV drift over commercial range
Slope Resistance	0.33 Ω typical - minimizes load-induced voltage shift during current variation
Operating Current	60 µA to 15 mA - supports ultra-low-power sleep modes and higher-drive active states
Transient Response	Stable in <10 µs - maintains reference integrity during fast supply switching or sensor wake-up
Max Reverse Current	25 mA continuous, 200 mA surge - survives ESD events and power rail transients

Pinout & Package

E-Line (3-pin TO-92 reversed) package: compact through-hole form factor 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 stable 5.0 V; connects to ADC REF+, op-amp feedback, or bias network
Pin 3	Floating or tied to Pin 1	No internal connection; may be grounded for mechanical stability or left open

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCBs without stability-compensation components
20 ppm/°C tempco (typ)	Reduces calibration burden in portable meters operating across ambient temperature swings
60 µA minimum operating current	Extends battery life in always-on monitoring circuits such as smoke detectors or environmental sensors
Sub-10 µs transient response	Maintains reference integrity during rapid power cycling in handheld test equipment
Automotive temperature range	Validated for use in under-hood or dashboard modules without derating

Applications

Battery-Powered Portable Meters

Precision Data Acquisition Front-Ends

Use Scenario: Handheld multimeter measuring DC voltage with 4½-digit resolution.

IC Role / Device Role / Timing Role: Shunt voltage reference for 24-bit sigma-delta ADC reference input.

Use Value: 20 ppm/°C TC and 0.33 Ω slope resistance ensure <±0.01% reading error across –10°C to +50°C ambient.

Use Scenario: Industrial sensor node digitizing thermocouple and RTD signals.

IC Role / Device Role / Timing Role: Stable 5.0 V reference for programmable gain instrumentation amplifier and ADC driver stage.

Use Value: Capacitor-free operation eliminates layout sensitivity; 60 µA min current enables ultra-low-power sleep mode between samples.

Automotive Cabin Climate Sensors

Calibration-Traceable Test Equipment

Use Scenario: HVAC control module measuring cabin temperature and humidity with NTC/HTS sensors.

IC Role / Device Role / Timing Role: Precision bias source for sensor excitation and ADC reference in AEC-Q200-compliant design.

Use Value: –55°C to +125°C rating and 40 ppm/°C max TC over full range meet automotive thermal validation requirements.

Use Scenario: Benchtop DMM calibration source verifying 0.005% accuracy standards.

IC Role / Device Role / Timing Role: Primary shunt reference in closed-loop voltage calibration circuit with laser-trimmed resistors.

Use Value: 2% initial tolerance and <10 µs settling enable fast auto-calibration sequences without reference drift-induced timeout errors.

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, adjustable via resistor divider; 50 ppm/°C max TC; requires ≥1 mA min current	Used where adjustable reference or higher current drive needed; not drop-in for fixed 5.0 V designs	Select when system already uses TL431-based feedback and 5.0 V can be derived via external resistors
LM4040CIM3-5.0	5.0 V fixed, 0.5% tolerance, 100 ppm/°C max TC, SOT-23 only, 60 µA min current	Higher accuracy but wider tempco; lacks automotive temp range and surge robustness	Prefer for cost-sensitive consumer applications where –40°C to +85°C suffices and 200 mA surge immunity is unnecessary

Compared with TL431ACDR and LM4040CIM3-5.0, ZR40402R50STZ uniquely combines fixed 5.0 V output, automotive temperature range, 200 mA surge tolerance, and E-Line through-hole compatibility - critical for legacy-replacement and harsh-environment analog signal conditioning.

Availability

ZR40402R50STZ is available at Aetrix Electronics and suitable for battery-powered portable meters, precision data acquisition front-ends, and automotive cabin climate sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ZR40402R50STZ 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 high-reliability power management, signal integrity, and precision analog solutions.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered for low-power, high-stability applications in portable, industrial, and automotive systems where accuracy, temperature resilience, and surge robustness are essential.

FAQ

What is the minimum operating current for ZR40402R50STZ?

The minimum operating current is 60 µA at 25°C, with 30 µA guaranteed across –55°C to +125°C per datasheet Section 4-181. Below this threshold, regulation degrades - design must ensure bias networks or load paths sustain ≥60 µA under all operating conditions, including deep sleep modes.

Does ZR40402R50STZ require an external capacitor for stability?

No - the device is internally compensated and stable without any external capacitor, even with capacitive loads up to 1 µF. This eliminates layout sensitivity and reduces BOM count in space-constrained designs like handheld instruments and sensor modules.

What is the meaning of "E-Line, 3 pin reversed" in the ordering information?

"E-Line, 3 pin reversed" refers to a TO-92 variant where pin 3 is electrically isolated (floating) or internally tied to pin 1 (anode), differing from standard TO-92 pinout. This configuration matches legacy board layouts requiring reversed lead assignment, as shown in datasheet diagram 4-184.

How does ZR40402R50STZ handle voltage transients?

Its 20 V process technology enables survival of 200 mA transient currents and suppression of fast spikes (<10 µs duration). This ruggedness is validated per AEC-Q200 stress tests and makes it suitable for automotive and industrial environments with noisy power rails or inductive load switching.

ZR40402R50STZ Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: E-Line-3

Series:: -

Packaging:: Tape & Box (TB)

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)

ZR40402R50STZ FAQ

1.How can I place an order for ZR40402R50STZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40402R50STZ 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 ZR40402R50STZ reliable?

The price and inventory of ZR40402R50STZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40402R50STZ is usually 5 days.

3.What payment methods are accepted for ZR40402R50STZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40402R50STZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40402R50STZ?

ZR40402R50STZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40402R50STZ 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 ZR40402R50STZ?

For technical support, including ZR40402R50STZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40402R50STZ requirements.

6.How does Aetrix verify that ZR40402R50STZ is sourced from the original manufacturer or authorized distributors?

All ZR40402R50STZ 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 ZR40402R50STZ meets industry standards.

7.What is the process for return or replacement of ZR40402R50STZ?

All ZR40402R50STZ units undergo pre-shipment inspection (PSI). If there is an issue with ZR40402R50STZ, 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 ZR40402R50STZ part is unused and in its original packaging.

Return procedure for ZR40402R50STZ:

1.Submit a request within 90 days.

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

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