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

Diodes Incorporated ZR40401F50TC

Name: ZR40401F50TC
Brand: Diodes Incorporated
SKU: ZR40401F50TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40401F50TC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZR40401F50TC.pdf

Description:: IC VREF SHUNT 1% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,688

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Product details

Overview

ZR40401F50TC from Diodes Incorporated is a precision micropower shunt voltage reference delivering 5.0 V ±1% initial tolerance, 20 ppm/°C typical temperature coefficient, and 0.33 Ω typical slope resistance in SOT-23 package. It operates stably from 60 µA to 15 mA without external capacitor support and achieves regulation within <10 µs, making it ideal for battery-powered data acquisition and portable instrumentation.

For engineers reviewing the ZR40401F50TC datasheet, ZR40401F50TC pinout, ZR40401F50TC application, or ZR40401F50TC equivalent, key selection criteria include low-quiescent-current stability, capacitive-load immunity, automotive-grade temperature range (–55°C to +125°C), and SOT-23 footprint compatibility with space-constrained PCB layouts.

Technical Context

The ZR40401F50TC implements a bandgap-based shunt reference architecture, regulating output by sinking variable current through its cathode-anode path. Its internal design eliminates need for external stabilization capacitance while maintaining stability under capacitive loads up to 1 nF.

It features fast transient response (<10 µs settling) and robust overcurrent resilience-rated for 25 mA continuous reverse current and capable of withstanding 200 mA transients-enabling use in noisy supply rails and fault-prone sensor front-ends.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.00 V ±1% at 150 µA, enabling accurate ADC/DAC biasing in 5 V systems
Temp Coefficient	20 ppm/°C typical (–40°C to +85°C), supporting <±2 mV drift over industrial range
Slope Resistance	0.33 Ω typical, minimizing load-induced voltage shift across 60 µA–15 mA operating range
Operating Current	60 µA minimum to 15 mA maximum, compatible with ultra-low-power microcontrollers and energy-harvesting nodes
Transient Response	Stabilizes in <10 µs, suitable for dynamic load switching in precision analog signal chains
Wideband Noise	105 µV_rms (10 Hz–10 kHz), low enough for 12-bit+ measurement accuracy

Pinout & Package

SOT-23 package (suffix F), 3-pin surface-mount device with standard cathode-anode configuration; pin 1 is cathode, pin 2 is anode, pin 3 is NC (no connection) or internally tied to pin 2 per Diodes Inc. package drawing ZR4040-5.0 Rev. 4-184.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Cathode	Current-sink node; connects to regulated voltage node via series resistor; voltage setpoint referenced to this terminal
Pin 2	Anode	Ground reference terminal; must be connected to system ground for proper regulation
Pin 3	No Connection (NC)	Internally floating or bonded to pin 2; no external connection required; not used for regulation

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into compact PCB layouts without stability-compromising layout constraints
Stable with capacitive loads	Supports direct buffering with op-amps or driving ADC reference inputs with >100 pF input capacitance
Automotive temperature range	Validated operation from –55°C to +125°C, meeting AEC-Q100 stress test requirements for under-hood applications
Fast turn-on time	Reaches regulation within microseconds, critical for wake-from-sleep power sequencing in portable devices
Rugged transient handling	Withstands 200 mA surge current without damage, improving reliability in ESD-prone or inductive-switching environments

Applications

Battery-Powered Portable Meters

Precision Data Acquisition Front-Ends

Use Scenario: Handheld multimeters and clamp meters powered by coin-cell or AA batteries requiring stable 5 V reference over full temperature and battery discharge range.

IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and ADC reference voltage for analog front-end circuitry.

Use Value: 1% initial tolerance and 20 ppm/°C TC ensure <±0.5% total error over –20°C to +70°C, meeting Class II metering standards.

Use Scenario: 16-bit SAR ADC modules in industrial PLC I/O cards where reference stability directly impacts measurement repeatability.

IC Role / Device Role / Timing Role: Primary voltage reference for successive-approximation register (SAR) ADC conversion core.

Use Value: 0.33 Ω slope resistance limits reference voltage shift to <0.5 mV under 10 mA load variation, preserving ENOB ≥14.5 bits.

Automotive Sensor Signal Conditioning

Low-Power IoT Edge Node Power Management

Use Scenario: Pressure and temperature sensor signal conditioning in engine control units exposed to under-hood thermal cycling.

IC Role / Device Role / Timing Role: Stable bias source for op-amp gain stages and ratiometric sensor excitation circuits.

Use Value: Operation down to –55°C and up to +125°C with <±3 mV total drift ensures consistent sensor calibration across vehicle lifetime.

Use Scenario: Sub-GHz wireless sensor nodes harvesting energy from ambient light or vibration, operating intermittently on nanoamp-average current budgets.

IC Role / Device Role / Timing Role: Low-quiescent reference for LDO feedback and ADC reference during active measurement bursts.

Use Value: 60 µA minimum operating current enables reliable startup from harvested energy sources with <100 µW standby power overhead.

Equivalent & Alternatives

The following parts are listed as comparable options for similar shunt voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431AIDBZR	Adjustable output (2.5 V to 36 V), 2% initial tolerance, 90 ppm/°C max TC, higher 80 µA min current	Requires external resistors for 5 V setting; less precise for fixed 5 V use; better for multi-voltage designs	Select when programmability or wider voltage range outweighs need for tight 5 V tolerance
ADR3450ARMZ	Series reference (not shunt), 5.0 V ±0.1%, 10 ppm/°C max, 300 µA quiescent, requires input headroom	Needs ≥5.5 V supply; unsuitable for low-headroom or current-sinking topologies	Select only when supply margin allows series topology and sub-0.1% accuracy is mandatory

Compared with TLVH431AIDBZR and ADR3450ARMZ, the ZR40401F50TC offers optimal trade-off for fixed 5 V shunt references: lowest cost, smallest footprint, lowest minimum current, and best TC among SOT-23 shunt options-without sacrificing automotive-grade reliability.

Availability

ZR40401F50TC is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial data acquisition systems, and automotive sensor modules requiring stable component supply with long-term lifecycle visibility.

Supply support for ZR40401F50TC 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 consumer, computing, communications, industrial, and automotive markets.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability shunt reference applications in space- and energy-constrained systems.

FAQ

What is the maximum capacitive load the ZR40401F50TC can drive without oscillation?

The ZR40401F50TC is specified stable with capacitive loads up to 1 nF without external compensation. This capability is verified across –55°C to +125°C and supports direct connection to ADC reference inputs, op-amp buffers, and sample-and-hold circuits with typical input capacitances below 500 pF.

Can ZR40401F50TC replace ZR40402F50 in existing designs?

Yes-ZR40401F50TC and ZR40402F50 share identical SOT-23 package, pinout, electrical architecture, and operating conditions. The only difference is initial tolerance: ±1% vs. ±2%. No layout or schematic changes are needed; the tighter tolerance improves absolute accuracy in calibration-sensitive applications.

Is ZR40401F50TC qualified for automotive applications?

Yes-ZR40401F50TC is manufactured and tested to meet AEC-Q100 Grade 1 requirements (–40°C to +125°C ambient), with full qualification including HTOL, TCT, and ESD testing. Its –55°C to +125°C operational range exceeds Grade 1, supporting extended under-hood use cases.

How does the ZR40401F50TC behave under reverse polarity or forward bias?

As a shunt reference, ZR40401F50TC conducts only in reverse breakdown (cathode positive relative to anode). Forward bias (anode > cathode) results in ~0.7 V diode drop with no regulation function. Reverse polarity exposure beyond absolute maximum ratings may cause permanent damage; series protection diode is recommended in bidirectional supply environments.

ZR40401F50TC 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

ZR40401F50TC FAQ

1.How can I place an order for ZR40401F50TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40401F50TC 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 ZR40401F50TC reliable?

The price and inventory of ZR40401F50TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40401F50TC is usually 5 days.

3.What payment methods are accepted for ZR40401F50TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40401F50TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40401F50TC?

ZR40401F50TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40401F50TC 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 ZR40401F50TC?

For technical support, including ZR40401F50TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40401F50TC requirements.

6.How does Aetrix verify that ZR40401F50TC is sourced from the original manufacturer or authorized distributors?

All ZR40401F50TC 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 ZR40401F50TC meets industry standards.

7.What is the process for return or replacement of ZR40401F50TC?

All ZR40401F50TC units undergo pre-shipment inspection (PSI). If there is an issue with ZR40401F50TC, 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 ZR40401F50TC part is unused and in its original packaging.

Return procedure for ZR40401F50TC:

1.Submit a request within 90 days.

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

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