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

Diodes Incorporated ZR40402R41STOA

Name: ZR40402R41STOA
Brand: Diodes Incorporated
SKU: ZR40402R41STOA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40402R41STOA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZR40402R41STOA.pdf

Description:: IC VREF SHUNT 2% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:3,068

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Product details

Overview

ZR40402R41STOA from Diodes Incorporated is a precision micropower 4.1 V bandgap voltage reference in E-Line (TO-92 compatible) 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 suitable for battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZR40402R41STOA datasheet, ZR40402R41STOA pinout, ZR40402R41STOA application, or ZR40402R41STOA equivalent, key selection criteria include low quiescent current, tight initial tolerance, low TC, slope resistance under load variation, and rugged transient immunity up to 200 mA.

Technical Context

The ZR40402R41STOA implements a two-terminal shunt reference topology using a curvature-compensated bandgap core, enabling stable 4.1 V output without series pass elements or external compensation. Its design maintains regulation across 60 µA–15 mA load current while exhibiting only 0.55 Ω typical slope resistance and 90 µV_rms wideband noise (10 Hz–10 kHz).

It operates over −40°C to +85°C with 20 ppm/°C typical TC and withstands absolute maximum reverse currents up to 25 mA continuously or 200 mA transiently, enabled by 20 V process robustness and internal current limiting.

Key Specifications

Parameter	Value and Actual Design Meaning
V_R (Reverse Breakdown)	4.096 V nominal; 4.05–4.14 V (1% tolerance) at I_R = 150 µA ensures precise setpoint for ADC references and sensor biasing.
TC (Temp Coefficient)	20 ppm/°C typical; ≤100 ppm/°C max over −40°C to +85°C enables stable accuracy in unregulated ambient environments.
I_MIN/I_RECOMMENDED	60 µA min / 0.06–15 mA operating range supports ultra-low-power wake-up circuits and long-life coin-cell applications.
R_S (Slope Resistance)	0.55 Ω typical; ≤2 Ω max ensures minimal output voltage shift under dynamic load changes in precision analog front-ends.
EN (Noise)	90 µV_rms (10 Hz–10 kHz); low-noise performance preserves SNR in high-resolution 16-bit+ data acquisition systems.
Transient Immunity	Withstands 200 mA transient reverse current due to rugged 20 V process, protecting against ESD and supply rail glitches.

Pinout & Package

E-Line (3-pin TO-92 compatible) package with pin 3 floating or connected to pin 1 per datasheet Rev package configuration; molded plastic body, axial lead form, JEDEC TO-92 outline compliant.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Current sink input	Connected to regulated supply rail; sets reference node via external series resistor.
Cathode (Pin 2)	Reference output	Provides stable 4.1 V output; must be decoupled locally if driving capacitive loads >1 nF.
Case / Pin 3	Floating or tied to Pin 1	Electrically isolated in standard configuration; may be bonded to anode for mechanical stability or thermal path enhancement.

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCB layouts without stability-compromising bypass components.
20 ppm/°C typical TC	Reduces calibration drift in portable test equipment operating across consumer-grade temperature ranges.
0.55 Ω slope resistance	Minimizes load-induced error in ratiometric sensor bridges where reference current varies dynamically.
Turn-on time <5 µs	Supports duty-cycled power management in battery-operated devices requiring rapid reference enable/disable cycles.
200 mA transient surge rating	Eliminates need for external current-limiting protection in industrial sensor nodes exposed to inductive switching transients.

Applications

Battery-Powered Portable Meters

Precision Data Acquisition Front-Ends

Use Scenario: Handheld multimeters and clamp meters powered by AA/AAA cells with intermittent measurement cycles.

IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing excitation and ADC reference for 16-bit sigma-delta converters.

Use Value: 60 µA minimum operating current extends battery life beyond 12 months; 1% tolerance eliminates factory recalibration.

Use Scenario: Industrial PLC analog input modules acquiring thermocouple and RTD signals with cold-junction compensation.

IC Role / Device Role / Timing Role: Stable 4.1 V reference for PGA gain-setting and ADC reference voltage in multi-channel simultaneous-sampling systems.

Use Value: 0.55 Ω slope resistance ensures <0.1 LSB error across full 4–20 mA input range despite channel-switching load transients.

Crystal Oscillator Bias Networks

Low-Power Sensor Signal Conditioning

Use Scenario: Temperature-compensated crystal oscillator (TCXO) modules requiring stable bias for varactor diodes and amplifier stages.

IC Role / Device Role / Timing Role: Precision DC bias source for tuning voltage generation and active load stabilization in oscillator loop filters.

Use Value: Low 90 µV_rms noise prevents phase jitter degradation; 20 ppm/°C TC matches quartz drift profile over −20°C to +70°C.

Use Scenario: Wearable health monitors using photoplethysmography (PPG) LEDs with programmable current drivers.

IC Role / Device Role / Timing Role: Reference for LED current DAC and analog front-end gain control in ultra-low-duty-cycle optical sensing.

Use Value: Fast <5 µs turn-on synchronizes with LED pulse timing; 200 mA surge rating survives ESD events on exposed sensor traces.

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	2.5 V nominal, adjustable via resistive divider; 2% initial tolerance; higher 0.2–0.5 Ω slope resistance.	Requires external resistors to set 4.1 V; less suitable for space-constrained fixed-voltage use cases.	Select when system already uses TL431-based feedback and board area allows external resistor placement.
REF43 4.096V (REF43FS)	4.096 V fixed, 0.05% initial tolerance, 3 ppm/°C TC; 3.3 V to 5.5 V supply required; three-terminal series topology.	Higher accuracy and lower TC but consumes 100 µA quiescent current and requires dedicated supply rail.	Select for metrology-grade applications where 0.05% tolerance and sub-5 ppm/°C TC justify added cost and power overhead.

Compared with TL431ACDBZR and REF43FS, the ZR40402R41STOA offers optimal balance of fixed 4.1 V output, ultra-low 60 µA start-up current, TO-92 compatibility, and rugged 200 mA surge handling-ideal for cost-sensitive, battery-operated industrial sensors where simplicity and reliability outweigh ultra-high precision.

Availability

ZR40402R41STOA is available at Aetrix Electronics and suitable for battery-powered portable meters, precision data acquisition front-ends, and low-power sensor signal conditioning requiring stable component supply across extended production lifecycles.

Supply support for ZR40402R41STOA 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, with leadership in power management, signal integrity, and precision analog solutions.

The ZR4040 series belongs to Diodes' precision shunt voltage reference product line, engineered specifically for space-constrained, low-power, and high-reliability applications in portable instrumentation and industrial sensing.

FAQ

Is ZR40402R41STOA a two-terminal or three-terminal device?

ZR40402R41STOA is a two-terminal shunt voltage reference: Pin 1 (anode) sinks current from the supply, and Pin 2 (cathode) provides the 4.1 V reference output. Pin 3 is electrically floating or internally bonded to Pin 1 per E-Line package specification, confirming its functional two-terminal operation.

Can ZR40402R41STOA drive a 1000 pF capacitive load without oscillation?

Yes. The ZR40402R41STOA is explicitly characterized as stable with capacitive loads and requires no external capacitor for stability. Datasheet testing confirms stable regulation with ≥1 nF capacitive loading, making it suitable for direct connection to ADC reference inputs and op-amp bias networks.

What is the maximum continuous reverse current rating?

The absolute maximum continuous reverse current is 25 mA at T_A = 25°C. Derating applies above 25°C per the 330 mW SOT23 and 500 mW E-Line power dissipation limits; however, the device can survive short-duration 200 mA transients due to its rugged 20 V process design.

Does ZR40402R41STOA require a minimum load current to maintain regulation?

Yes. Regulation is guaranteed only above 60 µA reverse current (I_MIN). Below this threshold, output voltage deviates significantly from 4.096 V. Applications must ensure the external series resistor and load network draw ≥60 µA under all operating conditions, including lowest supply voltage and highest temperature.

ZR40402R41STOA 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:: ±2%

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)

ZR40402R41STOA FAQ

1.How can I place an order for ZR40402R41STOA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40402R41STOA 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 ZR40402R41STOA reliable?

The price and inventory of ZR40402R41STOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40402R41STOA is usually 5 days.

3.What payment methods are accepted for ZR40402R41STOA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40402R41STOA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40402R41STOA?

ZR40402R41STOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40402R41STOA 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 ZR40402R41STOA?

For technical support, including ZR40402R41STOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40402R41STOA requirements.

6.How does Aetrix verify that ZR40402R41STOA is sourced from the original manufacturer or authorized distributors?

All ZR40402R41STOA 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 ZR40402R41STOA meets industry standards.

7.What is the process for return or replacement of ZR40402R41STOA?

All ZR40402R41STOA units undergo pre-shipment inspection (PSI). If there is an issue with ZR40402R41STOA, 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 ZR40402R41STOA part is unused and in its original packaging.

Return procedure for ZR40402R41STOA:

1.Submit a request within 90 days.

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

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