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

Diodes Incorporated ZR40401R41STOA

Name: ZR40401R41STOA
Brand: Diodes Incorporated
SKU: ZR40401R41STOA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40401R41STOA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZR40401R41STOA.pdf

Description:: IC VREF SHUNT 1% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:2,074

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Product details

Overview

ZR40401R41STOA from Diodes Incorporated is a precision micropower 4.1 V bandgap voltage reference in TO-92 package, rated for 1% initial tolerance, 20 ppm/°C typical temperature coefficient, and stable operation from 60 µA to 15 mA. It requires no external capacitor, supports capacitive loads, and delivers fast turn-on (<5 µs), making it ideal for battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZR40401R41STOA datasheet, ZR40401R41STOA pinout, ZR40401R41STOA application, or ZR40401R41STOA equivalent, key selection criteria include low quiescent current (60 µA min), slope resistance (0.55 Ω typ), reverse dynamic impedance (0.5–1.2 Ω), wide operating current range (60 µA–15 mA), and industrial temperature support (−40°C to +85°C).

Technical Context

The ZR40401R41STOA implements a bandgap-based shunt voltage reference architecture with inherent stability across load and temperature variations. Its design eliminates need for external stabilization capacitors while maintaining <5 µs transient response and supporting up to 200 mA surge current without damage.

It operates as a two-terminal device with cathode-anode configuration, delivering 4.1 V nominal output at 150 µA test current. Temperature drift is characterized over −40°C to +85°C using the standard TC formula, yielding 20 ppm/°C typical and 100 ppm/°C max average coefficient.

Key Specifications

Parameter	Value and Actual Design Meaning
V_R (Nominal)	4.1 V - precise shunt reference voltage at 150 µA, ±1% initial accuracy
Temp Coefficient	20 ppm/°C typ - ensures ≤±3.3 mV drift over −40°C to +85°C
Slope Resistance	0.55 Ω typ - low output impedance enables stable regulation under varying load current
Min Operating Current	60 µA - enables ultra-low-power operation in sleep-mode sensor nodes
Max Operating Current	15 mA - supports higher-accuracy applications with active biasing
Wideband Noise	90 µV_rms (10 Hz–10 kHz) - suitable for 12-bit+ precision ADC references
Abs Max Reverse Current	25 mA - defines safe continuous dissipation limit at 25°C ambient

Pinout & Package

Package: TO-92 (E-Line, 3-pin, reversed pinout: Pin 3 floating or connected to Pin 1; Pin 2 is cathode).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Connected to system ground; forms return path for reference current
Pin 2	Cathode	Output node - supplies regulated 4.1 V when biased via external resistor
Pin 3	NC / Anode Tie	Internally tied to Pin 1; may be left open or soldered to ground for mechanical stability

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCB layouts without stability-compromising bypass components
Fast turn-on time	Stabilizes within microseconds - critical for duty-cycled power management in portable meters
Capacitive load stability	Remains stable driving ≥100 nF - simplifies interface with ADC sample-and-hold or op-amp buffers
Rugged surge rating	Withstands 200 mA transient current - protects against ESD-induced latch-up or supply rail faults
Industrial temperature range	Guaranteed performance from −40°C to +85°C - validated for field-deployed test equipment

Applications

Battery-Powered Multimeters

Precision Data Loggers

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

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

Use Value: 1% initial tolerance and 20 ppm/°C TC ensure measurement accuracy remains within Class II specification across temperature.

Use Scenario: Low-power environmental sensor node logging temperature/humidity with 12-bit SAR ADC.

IC Role / Device Role / Timing Role: Micropower reference enabling sub-100 µA system sleep current while retaining calibration integrity.

Use Value: 60 µA minimum operating current allows continuous reference biasing during deep-sleep cycles without wake-up delay.

Portable Oscilloscope Probes

Calibration Standards for Field Test Sets

Use Scenario: Active probe compensation circuit needing stable DC offset reference independent of supply ripple.

IC Role / Device Role / Timing Role: Low-noise (90 µV_rms) shunt reference rejecting supply noise via high PSRR inherent to bandgap topology.

Use Value: 0.55 Ω slope resistance minimizes output voltage shift under probe bias current variation.

Use Scenario: Benchtop calibration source requiring traceable 4.1 V output with minimal warm-up drift.

IC Role / Device Role / Timing Role: Primary voltage standard in self-contained calibration module with internal temperature monitoring.

Use Value: Verified 100 ppm/°C max TC and −40°C to +85°C spec allow use in uncontrolled lab environments without oven control.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDBZR	Adjustable (2.5 V setpoint), higher 1 mA min current, 0.22 Ω typical slope resistance	Requires external resistive divider; less suited for fixed-voltage, ultra-low-I_Q use cases	Select when adjustable output or tighter slope resistance is prioritized over micropower operation
REF43 4.096V (REF43G)	Fixed 4.096 V, 10 ppm/°C max TC, 35 µA quiescent, but requires external capacitor for stability	Higher precision and lower drift, but adds BOM cost and layout area for capacitor	Select when absolute accuracy and long-term stability outweigh board space and component count constraints

Compared with TL431ACDBZR and REF43G, the ZR40401R41STOA uniquely balances 1% tolerance, 60 µA minimum current, capacitor-free operation, and TO-92 through-hole compatibility-making it optimal for cost-sensitive, space-limited, battery-operated instrumentation where moderate drift is acceptable.

Availability

ZR40401R41STOA is available at Aetrix Electronics and suitable for battery-powered multimeters, portable data loggers, and handheld calibration tools requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZR40401R41STOA 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 and manufacturing operations across Asia and the Americas.

This device belongs to the ZR4040 series of precision shunt references, engineered specifically for low-power, high-stability applications in portable test equipment and industrial sensing where fixed-voltage accuracy and robustness outweigh programmability needs.

FAQ

What is the maximum safe reverse current for continuous operation?

The ZR40401R41STOA is rated for 25 mA maximum reverse current at 25°C ambient. Exceeding this value risks thermal runaway or permanent degradation. Derating is required above 25°C per the 500 mW TO-92 power dissipation limit, and absolute maximum surge current is 200 mA for short transients only.

Can this device drive a 100 nF capacitive load without oscillation?

Yes - the ZR40401R41STOA is explicitly characterized as stable with capacitive loads up to at least 100 nF, per manufacturer testing. No external series resistor or isolation capacitor is needed, unlike many competing shunt references that require careful compensation networks.

Is the TO-92 pinout compatible with legacy ZR4040 variants?

Yes - the ZR40401R41STOA uses the reversed TO-92 pinout (Pin 3 tied to Pin 1, Pin 2 cathode), matching the ZR40402R41 and ZR40401R41 part markings in Diodes' official ordering table. This differs from standard TO-92 orientation and must be verified on silkscreen during layout.

How does its 20 ppm/°C typical TC compare to the 100 ppm/°C maximum?

The 20 ppm/°C is the typical average temperature coefficient measured across −40°C to +85°C; the 100 ppm/°C maximum reflects worst-case unit variation. Real-world drift for most units stays within ±1.7 mV over full temperature range, well below the ±4.1 mV implied by 100 ppm/°C.

ZR40401R41STOA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: E-Line-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:: Through Hole

Supplier Device Package:: E-Line (TO-92 compatible)

ZR40401R41STOA FAQ

1.How can I place an order for ZR40401R41STOA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40401R41STOA 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 ZR40401R41STOA reliable?

The price and inventory of ZR40401R41STOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40401R41STOA is usually 5 days.

3.What payment methods are accepted for ZR40401R41STOA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40401R41STOA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40401R41STOA?

ZR40401R41STOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40401R41STOA 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 ZR40401R41STOA?

For technical support, including ZR40401R41STOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40401R41STOA requirements.

6.How does Aetrix verify that ZR40401R41STOA is sourced from the original manufacturer or authorized distributors?

All ZR40401R41STOA 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 ZR40401R41STOA meets industry standards.

7.What is the process for return or replacement of ZR40401R41STOA?

All ZR40401R41STOA units undergo pre-shipment inspection (PSI). If there is an issue with ZR40401R41STOA, 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 ZR40401R41STOA part is unused and in its original packaging.

Return procedure for ZR40401R41STOA:

1.Submit a request within 90 days.

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

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