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

Diodes Incorporated ZR40401R50STZ

Name: ZR40401R50STZ
Brand: Diodes Incorporated
SKU: ZR40401R50STZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40401R50STZ

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZR40401R50STZ.pdf

Description:: IC VREF SHUNT 1% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:3,927

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Product details

Overview

ZR40401R50STZ 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 ±1% initial tolerance, 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 ZR40401R50STZ datasheet, ZR40401R50STZ pinout, ZR40401R50STZ application, or ZR40401R50STZ equivalent, key selection criteria include micropower operation down to 60 µA, automotive-grade temperature range (−55°C to +125°C), SOT-23 package compatibility, and capacitor-free stability with capacitive loads.

Technical Context

The ZR40401R50STZ 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 immunity to supply variations, with no external compensation required.

It exhibits robust transient response (<10 µs settling), low dynamic impedance (0.4 Ω at 1 mA, 100 Hz), and wide operating current range (60 µA–15 mA), enabling use in both ultra-low-power sensing nodes and higher-current precision biasing circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.00 V ±1% at 150 µA - ensures accurate ADC/DAC reference or sensor excitation within tight system tolerances
Temp. Coefficient	20 ppm/°C typical (−40°C to +85°C) - supports stable performance across industrial ambient shifts
Slope Resistance	0.33 Ω typical - minimizes output voltage shift under load current variation
Operating Current	60 µA to 15 mA - enables direct use in microcontroller sleep-mode monitoring and active analog stages
Transient Response	<10 µs to stable output - allows fast wake-up and calibration cycles in portable instrumentation
Wideband Noise	105 µV_rms (10 Hz–10 kHz) - suitable for 12-bit+ data acquisition without added filtering

Pinout & Package

Package: SOT-23 (3-pin, surface-mount); pin 1 = anode, pin 2 = cathode, pin 3 = NC (not connected) - compatible with standard pick-and-place and reflow processes.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Reference return path	Connected to system ground or low-impedance return node; defines reference potential reference point
Pin 2 (Cathode)	Regulated output terminal	Provides stable 5.0 V when reverse-biased; sinks current from external source or regulator feedback loop
Pin 3 (NC)	No connection	Internally unconnected; must remain floating per datasheet - no PCB trace or thermal pad tie-down

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference design in space-constrained layouts like wearables and sensor nodes
Capacitive load stability	Supports direct connection to ADC input caps or op-amp feedback networks without oscillation risk
Automotive temperature range	Validated operation from −55°C to +125°C - meets AEC-Q100 stress requirements for under-hood modules
Low minimum operating current	60 µA start-up threshold allows integration into always-on battery monitors with multi-year runtime

Applications

Battery-Powered Portable Meters

Precision Data Acquisition Front-Ends

Use Scenario: Handheld multimeters and clamp meters powered by coin cells or AA batteries requiring long shelf life and stable reading accuracy.

IC Role / Device Role / Timing Role: Shunt reference providing excitation voltage for resistive divider networks and ADC reference input.

Use Value: 1% initial tolerance and 20 ppm/°C TC ensure <0.1% full-scale error over −20°C to +60°C operating range.

Use Scenario: Industrial PLC analog input modules digitizing 4–20 mA or 0–10 V sensor signals with 16-bit resolution.

IC Role / Device Role / Timing Role: Precision voltage reference for SAR ADC reference buffer and sensor signal conditioning gain-setting.

Use Value: 0.33 Ω slope resistance limits reference voltage shift to <15 µV per 50 µA load change, preserving ENOB.

Automotive Cabin Temperature Sensors

Low-Power IoT Node Reference

Use Scenario: NTC/RTD-based cabin air temperature sensing in HVAC control units exposed to under-dash thermal cycling.

IC Role / Device Role / Timing Role: Stable 5.0 V bias source for Wheatstone bridge excitation and cold-junction compensation.

Use Value: −55°C to +125°C rating and 40 ppm/°C max TC (−55°C to +125°C) guarantee calibration integrity across vehicle lifetime.

Use Scenario: Wireless environmental sensors (e.g., soil moisture, air quality) operating on CR2032 batteries for >5 years.

IC Role / Device Role / Timing Role: Micropower reference for ultra-low-duty-cycle ADC sampling and RF transceiver biasing.

Use Value: 60 µA minimum operating current enables continuous monitoring with sub-1 µA average system current.

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	Adjustable output (2.5 V base), 2% initial tolerance, 50 ppm/°C TC, requires external resistor network	Used where programmable reference or higher current (>100 mA) sink capability is needed	Select when flexibility in reference voltage setting outweighs need for fixed 5.0 V and lowest quiescent current
REF43 5.0	5.0 V fixed, 0.05% initial tolerance, 3 ppm/°C TC, 1.2 mA quiescent, requires bypass capacitor	Targeted at metrology-grade instruments demanding sub-ppm stability and ultra-low noise	Choose only when system budget and board area allow higher cost, higher power, and capacitor-dependent layout

Compared with TL431ACDBVR and REF43 5.0, ZR40401R50STZ uniquely balances micropower operation (60 µA), fixed 5.0 V ±1%, capacitor-free stability, and automotive temperature range - making it optimal for cost-sensitive, space-limited, battery-operated precision analog systems.

Availability

ZR40401R50STZ is available at Aetrix Electronics and suitable for battery-powered portable equipment, precision data acquisition systems, and automotive cabin sensor modules requiring stable component supply and long-term lifecycle support.

Supply support for ZR40401R50STZ 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, high-efficiency components for industrial, computing, and automotive markets.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability shunt references in portable and harsh-environment applications.

FAQ

What is the maximum reverse current ZR40401R50STZ can safely handle?

The absolute maximum reverse current is 25 mA per datasheet. However, the device is rated for reliable operation up to 200 mA transient surges due to rugged 20 V process design - this withstand capability protects against ESD and load-dump events in automotive environments without external current limiting.

Can ZR40401R50STZ be used with ceramic output capacitors?

Yes - the ZR40401R50STZ is explicitly characterized as stable with capacitive loads, including ceramic capacitors up to 1 µF. No series resistance or damping network is required, simplifying layout in noise-sensitive measurement circuits.

Does ZR40401R50STZ require a minimum load current to regulate properly?

Yes - regulation begins at 60 µA minimum operating current. Below this, output voltage deviates significantly. For battery-monitoring applications, ensure the reference leg draws ≥60 µA via a pull-up resistor or active bias network to maintain accuracy during deep-sleep states.

How does the SOT-23 package suffix 'STZ' map to ordering information?

The 'STZ' suffix denotes Diodes Incorporated's standard SOT-23-3 package with tape-and-reel packaging (3000 pcs/reel), RoHS-compliant finish, and 1% initial tolerance. It corresponds to orderable part ZR40401F50 per the manufacturer's ordering table, where 'F' = SOT-23 and '1' = 1% tolerance.

ZR40401R50STZ 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:: ±1%

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)

ZR40401R50STZ FAQ

1.How can I place an order for ZR40401R50STZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40401R50STZ 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 ZR40401R50STZ reliable?

The price and inventory of ZR40401R50STZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40401R50STZ is usually 5 days.

3.What payment methods are accepted for ZR40401R50STZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40401R50STZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40401R50STZ?

ZR40401R50STZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40401R50STZ 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 ZR40401R50STZ?

For technical support, including ZR40401R50STZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40401R50STZ requirements.

6.How does Aetrix verify that ZR40401R50STZ is sourced from the original manufacturer or authorized distributors?

All ZR40401R50STZ 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 ZR40401R50STZ meets industry standards.

7.What is the process for return or replacement of ZR40401R50STZ?

All ZR40401R50STZ units undergo pre-shipment inspection (PSI). If there is an issue with ZR40401R50STZ, 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 ZR40401R50STZ part is unused and in its original packaging.

Return procedure for ZR40401R50STZ:

1.Submit a request within 90 days.

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

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