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

Diodes Incorporated ZR40401F41TA

Name: ZR40401F41TA
Brand: Diodes Incorporated
SKU: ZR40401F41TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40401F41TA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZR40401F41TA.pdf

Description:: IC VREF SHUNT 1% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:23,725

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Product details

Overview

ZR40401F41TA from Diodes Incorporated is a precision micropower shunt voltage reference delivering 4.1 V ±1% initial tolerance, 20 ppm/°C typical temperature coefficient, and 0.55 Ω typical slope resistance in SOT23-3 package. It operates stably from 60 µA to 15 mA without external capacitor support and is used in battery-powered instrumentation, data acquisition front-ends, and crystal oscillator biasing circuits.

For engineers reviewing the ZR40401F41TA datasheet, ZR40401F41TA pinout, ZR4041TA application, or ZR40401F41TA equivalent, key selection criteria include low operating current capability (60 µA min), tight voltage tolerance (±1%), capacitive-load stability, and industrial temperature range (–40°C to +85°C) for portable and measurement systems.

Technical Context

The ZR40401F41TA implements a bandgap-based shunt reference architecture with inherent stability across load and temperature variations. Its design eliminates need for external stabilization capacitors while maintaining <1.2 Ω dynamic impedance at 1 mA and 90 µV_rms wideband noise (10 Hz–10 kHz).

It functions as a two-terminal device with cathode and anode terminals, requiring only a series resistor for current sourcing. The device sustains stable regulation up to 25 mA absolute maximum forward current and withstands transient surges up to 200 mA due to rugged 20 V process technology.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	4.1 V ±1% at 150 µA - ensures accurate ADC/DAC biasing in precision analog signal chains
Temp Coefficient	20 ppm/°C typical - enables ≤±0.82 mV drift over –40°C to +85°C operating range
Slope Resistance	0.55 Ω typical - minimizes output voltage shift under load current variation
Operating Current	60 µA to 15 mA - supports ultra-low-power sensor nodes and high-accuracy active circuits
Dynamic Impedance	0.4 Ω typical at 1 mA, 100 Hz - improves rejection of ripple and noise in regulated supplies
Wideband Noise	90 µV_rms (10 Hz–10 kHz) - critical for high-resolution metrology and audio-grade references

Pinout & Package

SOT23-3 surface-mount package with gull-wing leads; compact footprint (2.80 × 2.10 mm), 1.12 mm max height, and JEDEC-compliant thermal profile.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Current sink terminal	Connected to system ground; completes shunt current path when biased via external resistor
Pin 2 (Cathode)	Reference output node	Provides stable 4.1 V output; connects to load or feedback network of regulator/ADC
Pin 3 (NC / Floating)	No-connect terminal	Internally unconnected; must remain unconnected per datasheet - not usable as trim or enable

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCB layouts without stability-compromising bypass components
Stable with capacitive loads	Supports direct connection to ADC input caps or PLL loop filters without oscillation risk
20 ppm/°C tempco	Meets Class I accuracy requirements for portable multimeters and handheld calibration tools
60 µA minimum operating current	Extends battery life in coin-cell-powered IoT sensors beyond 5 years at 10 µA average system draw
Rugged 200 mA surge rating	Survives ESD events and power-rail transients without derating or protection circuitry

Applications

Portable Multimeters

Industrial Data Loggers

Use Scenario: Handheld digital multimeter requiring stable 4.1 V reference for 16-bit SAR ADC scaling.

IC Role / Device Role / Timing Role: Shunt voltage reference providing ratiometric excitation for precision resistive divider networks.

Use Value: ±1% initial tolerance and 20 ppm/°C TC ensure <0.05% full-scale error across –10°C to +50°C field operating range.

Use Scenario: Battery-operated environmental sensor node logging temperature/humidity with 24-bit sigma-delta ADC.

IC Role / Device Role / Timing Role: Low-current reference source enabling continuous 10 µA sleep-mode operation with fast wake-up (<5 µs settling).

Use Value: 60 µA min operating current and 90 µV_rms noise preserve ENOB >21 bits in low-frequency measurement bands.

Crystal Oscillator Biasing

Programmable Power Supply Trim

Use Scenario: VCXO module requiring precise 4.1 V bias for varactor diode tuning range control.

IC Role / Device Role / Timing Role: Stable DC reference setting center frequency of temperature-compensated oscillator core.

Use Value: 0.55 Ω slope resistance limits frequency drift to <±0.5 ppm under 1 mA load variation from oscillator bias current.

Use Scenario: Lab-grade bench power supply with digitally adjustable 0–30 V output using DAC-controlled feedback divider.

IC Role / Device Role / Timing Role: Precision reference for DAC output scaling and feedback loop reference injection point.

Use Value: Capacitive-load stability allows direct connection to 10 nF DAC output filter without phase margin loss or overshoot.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM4040C41IDBZR	±0.5% initial tolerance, 50 ppm/°C max TC, 0.3 Ω typical Z_z, SOT23-3	Tighter tolerance but higher tempco; requires ≥75 µA min current	Preferred where absolute accuracy dominates over temperature stability and battery life
ADR3441ARJZ-R7	Series topology, 4.096 V ±0.1%, 10 ppm/°C max, 100 µA min, SOT23-5	Higher accuracy and lower TC but consumes more quiescent current and needs external decoupling	Selected when system-level noise immunity and long-term drift matter more than board space or ultra-low I_Q

Compared with LM4040C41IDBZR and ADR3441ARJZ-R7, ZR40401F41TA offers optimal balance of ultra-low operating current (60 µA), moderate accuracy (±1%), and zero-external-capacitor simplicity - making it ideal for cost-sensitive, space-constrained, battery-powered measurement nodes where ±0.5% additional error is acceptable.

Availability

ZR40401F41TA is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and crystal oscillator biasing circuits requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZR40401F41TA 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The ZR4040 series belongs to Diodes' precision analog portfolio, engineered specifically for low-power, high-stability voltage referencing in portable and industrial measurement systems where size, current efficiency, and thermal robustness are critical.

FAQ

Is ZR40401F41TA a shunt or series voltage reference?

ZR40401F41TA is a two-terminal shunt voltage reference. It operates by sinking current through an external series resistor to maintain 4.1 V across its cathode-to-anode terminals. Unlike series references, it does not regulate output voltage between input and output pins but instead provides a stable node referenced to ground.

Can ZR40401F41TA drive capacitive loads directly?

Yes - the ZR40401F41TA is explicitly designed for capacitive-load stability without external compensation. Datasheet confirms stable operation with loads up to 1 µF, making it suitable for direct connection to ADC input capacitors, PLL loop filters, and DAC output buffers.

What is the significance of Pin 3 being NC in SOT23 package?

Pin 3 is internally unconnected and must remain floating per datasheet. It is not a trim, enable, or thermal pad. Routing traces to or soldering this pin may cause mechanical stress or unintended coupling, degrading voltage stability or long-term reliability.

Why is ZR40401F41TA marked "Not Recommended for New Design"?

This marking reflects Diodes' internal product lifecycle status: while fully functional and in active production, newer alternatives like the AP431x or ZR431 series offer improved specs. ZR40401F41TA remains supported with full datasheet, reliability data, and supply chain continuity for legacy and cost-optimized designs.

ZR40401F41TA 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):: 4.096V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±1%

Temperature Coefficient:: 100ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 90µVrms

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

ZR40401F41TA FAQ

1.How can I place an order for ZR40401F41TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40401F41TA 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 ZR40401F41TA reliable?

The price and inventory of ZR40401F41TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40401F41TA is usually 5 days.

3.What payment methods are accepted for ZR40401F41TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40401F41TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40401F41TA?

ZR40401F41TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40401F41TA 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 ZR40401F41TA?

For technical support, including ZR40401F41TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40401F41TA requirements.

6.How does Aetrix verify that ZR40401F41TA is sourced from the original manufacturer or authorized distributors?

All ZR40401F41TA 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 ZR40401F41TA meets industry standards.

7.What is the process for return or replacement of ZR40401F41TA?

All ZR40401F41TA units undergo pre-shipment inspection (PSI). If there is an issue with ZR40401F41TA, 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 ZR40401F41TA part is unused and in its original packaging.

Return procedure for ZR40401F41TA:

1.Submit a request within 90 days.

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

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