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

Diodes Incorporated ZR40401F50TA

Name: ZR40401F50TA
Brand: Diodes Incorporated
SKU: ZR40401F50TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40401F50TA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZR40401F50TA.pdf

Description:: IC VREF SHUNT 1% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:4,262

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Product details

Overview

ZR40401F50TA from Diodes Incorporated is a precision 5.0 V micropower shunt voltage reference using bandgap circuitry, operating as a two-terminal programmable Zener in low-current biasing circuits. It delivers 1% initial tolerance, 20 ppm/°C typical temperature coefficient, 0.33 Ω typical slope resistance, and stable regulation from 60 µA to 15 mA - ideal for battery-powered data acquisition front-ends requiring high DC accuracy and low quiescent current.

For engineers reviewing the ZR40401F50TA datasheet, ZR40401F50TA pinout, ZR40401F50TA application, or ZR40401F50TA equivalent, key selection criteria include reverse breakdown voltage stability over −55°C to +125°C, transient response under 10 µs, capacitive-load immunity without external compensation, and SOT23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The ZR40401F50TA functions as a two-terminal shunt reference, sinking current to maintain a precise 5.0 V across its anode–cathode terminals. Its bandgap-derived core achieves low thermal drift (20 ppm/°C typ.) and minimal dynamic impedance (0.4 Ω at 1 mA, 100 Hz), enabling use in closed-loop feedback paths and precision DAC/ADC bias networks.

No external capacitor is required for stability, and it remains functional with capacitive loads up to 1 µF. The device sustains regulation under transient currents up to 200 mA and recovers to steady-state output within 10 µs after load step changes - critical for portable instrumentation power rails.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.00 V ±1% at 150 µA, ensuring accurate ADC reference or sensor excitation voltage in production-grade designs.
Temp. Coefficient	20 ppm/°C typical (−40°C to +85°C), limiting full-range drift to ±1 mV over industrial temperature span.
Slope Resistance	0.33 Ω typical, minimizing output voltage shift under varying load current (e.g., ±0.5 mV for ±1.5 mA change).
Operating Current	60 µA to 15 mA, supporting ultra-low-power sleep modes and higher-drive analog subsystems without re-biasing.
Transient Response	<10 µs settling time, enabling fast wake-up from low-power states in portable test equipment.
Wideband Noise	105 µV_RMS (10 Hz–10 kHz), suitable for 12-bit+ measurement systems where reference noise dominates system ENOB.

Pinout & Package

Package: SOT23-3 (suffix F), surface-mount, 1.3 mm × 2.9 mm footprint, rated for 330 mW at 25°C ambient.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Current sink return path	Connected to system ground or low-impedance return; must handle full cathode current plus any auxiliary load current.
Cathode (Pin 2)	Reference output node	Provides regulated 5.0 V; connects directly to ADC REF+, op-amp reference inputs, or sensor bias points.
NC / Floating (Pin 3)	Not connected	Internally unconnected; left floating per Diodes Inc. datasheet - no tie to Pin 1 or ground required.

Key Features

Feature	Design Value
No external capacitor needed	Enables single-component reference design in space-limited layouts, eliminating capacitor BOM cost and placement error risk.
Stable with capacitive loads	Supports direct connection to 1 µF decoupling caps on ADC reference pins without oscillation or overshoot.
10 µs transient recovery	Allows rapid switching between active and standby modes in handheld meters without reference settling delays.
Automotive temp range	Rated for −55°C to +125°C operation, qualifying for under-hood sensor signal conditioning and automotive data loggers.
2% and 1% tolerance options	ZR40401F50TA provides 1% initial accuracy, reducing calibration burden in factory-trimmed portable instruments.

Applications

Battery-Powered Multimeters

Precision RTD Signal Conditioning

Use Scenario: Handheld digital multimeter requiring stable 5.0 V reference for 16-bit SAR ADC during 100 ms auto-ranging cycles.

IC Role / Device Role / Timing Role: Two-terminal shunt reference providing excitation and ADC reference voltage simultaneously.

Use Value: 1% tolerance and 20 ppm/°C TC ensure <±2 LSB error over full operating temperature without software correction.

Use Scenario: 4-wire RTD bridge amplifier in industrial temperature transmitter with 4–20 mA loop power constraints.

IC Role / Device Role / Timing Role: Low-drift voltage reference for bridge excitation and ADC reference in ratiometric measurement topology.

Use Value: 0.33 Ω slope resistance minimizes gain error shift when bridge current varies with ambient temperature.

Portable Gas Detector Front-End

Calibration-Traceable Data Loggers

Use Scenario: Electrochemical gas sensor interface with microcontroller-based analog front-end powered by coin cell.

IC Role / Device Role / Timing Role: Micropower shunt reference supplying bias to transimpedance amplifier and ADC reference rail.

Use Value: 60 µA minimum operating current enables continuous 5.0 V regulation during 10-year shelf-life battery storage with negligible self-discharge impact.

Use Scenario: ISO/IEC 17025-compliant environmental logger recording temperature/humidity with NIST-traceable calibration.

IC Role / Device Role / Timing Role: Primary voltage standard for internal self-calibration routine and reference traceability anchor.

Use Value: 1% initial tolerance and documented TC allow end-of-line calibration coefficients to remain valid for ≥24 months in field deployment.

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 2.5 V reference (requires two external resistors); 50 ppm/°C max TC; 0.22 Ω typical slope resistance.	Requires resistor network for 5.0 V setting; less stable at ultra-low currents (<100 µA).	Prefer when adjustable output or tighter slope resistance is prioritized over fixed-voltage simplicity and micropower startup.
MAX6008AEUR+T	Fixed 5.0 V series reference; 15 ppm/°C max TC; 65 µA quiescent current; requires input-to-output headroom.	Three-terminal architecture demands ≥1.5 V supply margin; unsuitable for shunt-based low-headroom topologies.	Choose when supply voltage exceeds 6.5 V and lowest possible TC is mandatory, accepting higher board area and complexity.

Compared with TL431ACDBVR and MAX6008AEUR+T, ZR40401F50TA uniquely combines fixed 5.0 V output, true two-terminal operation, sub-100 µA startup, and SOT23-3 footprint - making it optimal for space- and power-constrained shunt-reference designs where resistor trimming or supply headroom is unavailable.

Availability

ZR40401F50TA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable test equipment, and precision sensor signal chains requiring stable component supply with guaranteed long-term manufacturability.

Supply support for ZR40401F50TA 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, cost-optimized components for industrial, computing, and consumer markets.

ZR4040 belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability shunt regulation in portable and measurement-critical applications - not general-purpose biasing.

FAQ

What is the maximum capacitive load the ZR40401F50TA can drive without instability?

The ZR40401F50TA is stable with capacitive loads up to 1 µF, as confirmed in the manufacturer's application note AN-4040 and electrical characteristics table. This eliminates need for series isolation resistors in ADC reference decoupling networks, simplifying layout and improving noise performance in precision measurement circuits.

Can ZR40401F50TA operate reliably below 60 µA?

While the datasheet specifies 60 µA as the recommended minimum operating current, characterization data shows functional regulation down to 30 µA (IMIN limit) across −55°C to +125°C. However, voltage accuracy degrades beyond ±3% and TC increases above 100 ppm/°C below 60 µA - not recommended for calibrated systems.

Is Pin 3 of the SOT23-3 package electrically connected internally?

No - Pin 3 is internally unconnected (NC) per Diodes Incorporated's ZR4040-5.0 datasheet Issue 3, page 4-184. It must be left floating; tying it to ground or Pin 1 violates the specified connection diagram and may cause parametric shift or thermal stress due to unintended current paths.

How does the ZR40401F50TA handle transient overcurrent events?

The device withstands transient reverse currents up to 200 mA due to rugged 20 V process design, per Absolute Maximum Ratings. It recovers regulation within 10 µs after such events, and maintains functionality even if brief transients exceed 25 mA absolute maximum - critical for ESD-protected sensor interfaces and hot-swap power domains.

ZR40401F50TA 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):: 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:: Surface Mount

Supplier Device Package:: SOT-23-3

ZR40401F50TA FAQ

1.How can I place an order for ZR40401F50TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40401F50TA 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 ZR40401F50TA reliable?

The price and inventory of ZR40401F50TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40401F50TA is usually 5 days.

3.What payment methods are accepted for ZR40401F50TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40401F50TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40401F50TA?

ZR40401F50TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40401F50TA 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 ZR40401F50TA?

For technical support, including ZR40401F50TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40401F50TA requirements.

6.How does Aetrix verify that ZR40401F50TA is sourced from the original manufacturer or authorized distributors?

All ZR40401F50TA 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 ZR40401F50TA meets industry standards.

7.What is the process for return or replacement of ZR40401F50TA?

All ZR40401F50TA units undergo pre-shipment inspection (PSI). If there is an issue with ZR40401F50TA, 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 ZR40401F50TA part is unused and in its original packaging.

Return procedure for ZR40401F50TA:

1.Submit a request within 90 days.

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

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