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

Diodes Incorporated ZR40402N850TA

Name: ZR40402N850TA
Brand: Diodes Incorporated
SKU: ZR40402N850TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40402N850TA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: ZR40402N850TA.pdf

Description:: IC VREF SHUNT 2% 8SOP

Quantity:: RFQ Add To RFQ list

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Inventory:3,606

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Product details

Overview

ZR40402N850TA from Diodes Incorporated is a precision 5.0 V micropower shunt voltage reference using bandgap circuitry, designed for low-current regulation in battery-powered systems. It delivers 5.00 V ±2% initial accuracy, 20 ppm/°C typical temperature coefficient, 0.33 Ω typical slope resistance, operates from 60 µA to 15 mA, and achieves stable output in <10 µs without external capacitor-used in portable instrumentation and data acquisition front-ends.

For engineers reviewing the ZR40402N850TA datasheet, ZR40402N850TA pinout, ZR40402N850TA application, or ZR40402N850TA equivalent, key selection criteria include guaranteed 2% tolerance at 25°C, industrial −40°C to +85°C operation, no-required stabilization capacitor, transient response under 10 µs, and SO8 package compatibility with high-density PCB layouts.

Technical Context

The ZR40402N850TA functions as a two-terminal shunt reference, sinking current to maintain a precise 5.0 V reverse breakdown voltage across its cathode-anode terminals. Its bandgap core ensures stability over temperature and load, with slope resistance of 0.33 Ω (typ) enabling tight regulation even under varying sink current from 60 µA to 15 mA.

It exhibits wideband noise of 105 µV_rms (10 Hz–10 kHz), dynamic impedance of 0.4 Ω at 100 Hz, and withstands transient currents up to 200 mA due to rugged 20 V process design-making it suitable for noisy supply rails and intermittent load switching environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.00 V ±2% at 25°C, 150 µA test current-ensures accurate ADC/DAC biasing and sensor excitation in precision analog signal chains.
Temp. Coefficient	20 ppm/°C typical (−40°C to +85°C)-limits full-range drift to ±1 mV, critical for metering and calibration equipment.
Slope Resistance	0.33 Ω typical (60 µA–15 mA range)-minimizes output voltage shift under load variation, improving regulation in varying-sink applications.
Operating Current	60 µA minimum to 15 mA maximum-supports ultra-low-power sleep modes and higher-drive active states without external compensation.
Transient Response	Stabilizes in <10 µs after step load-enables fast wake-up in battery-operated devices with burst-mode sensing or communication.
Noise (10 Hz–10 kHz)	105 µV_rms-low enough to avoid degrading 16-bit+ data acquisition system SNR when used as reference for SAR ADCs.

Pinout & Package

Package: SO8 (suffix N8), surface-mount, 8-pin small outline with pin 1 floating or connected to pin 2 per datasheet revision.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (Pin 1)	Reference output node	Connected to regulated 5.0 V rail; sinks current to maintain voltage-requires series resistor from supply to set operating point.
Anode (Pin 2)	Ground reference terminal	Common return path; must be low-impedance to minimize ground bounce-induced error in precision circuits.
NC (Pins 3–8)	No-connect	Internally unconnected; left floating per manufacturer specification-no routing or thermal tie required.

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCBs without stability-compromising layout dependencies.
Stable with capacitive loads	Supports local decoupling directly at reference output-reduces noise coupling in mixed-signal SoC power domains.
200 mA transient surge rating	Survives ESD events and supply rail glitches without latch-up or parameter shift-enhances field reliability.
SO8, SOT23, and TO92 packaging options	Allows footprint reuse across prototyping (SOT23), production (SO8), and legacy through-hole (E-Line) assembly lines.

Applications

Portable Multimeter Front-End

Battery-Powered Data Logger

Use Scenario: High-impedance voltage measurement channel requiring stable 5.0 V reference for 24-bit sigma-delta ADC.

IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling reference for analog input stage.

Use Value: 20 ppm/°C TC and 105 µV_rms noise ensure <±0.01% measurement accuracy across −10°C to +50°C ambient.

Use Scenario: Intermittent sampling system powered by coin-cell battery with 10-year shelf life target.

IC Role / Device Role / Timing Role: Low-quiescent-current voltage reference enabling sub-100 µA system sleep current.

Use Value: 60 µA minimum operating current allows continuous reference bias without compromising battery longevity.

Precision Industrial Sensor Transmitter

Calibration Equipment Reference Module

Use Scenario: 4–20 mA loop-powered transmitter with onboard RTD signal conditioning.

IC Role / Device Role / Timing Role: Stable 5.0 V reference for excitation current source and ADC reference in isolated analog domain.

Use Value: 0.33 Ω slope resistance minimizes gain error drift across 4–20 mA loop current variations.

Use Scenario: Benchtop calibrator requiring traceable, low-drift reference for voltage standard generation.

IC Role / Device Role / Timing Role: Primary shunt reference in cascaded buffer-regulator architecture for 5.000 V output.

Use Value: 2% initial tolerance and <10 µs settling support rapid auto-calibration sequences with minimal dwell time.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDR	2.5 V nominal output, adjustable via resistive divider; 50 ppm/°C max TC; requires external feedback network.	Used where programmable reference or higher output flexibility is needed-not drop-in for fixed 5.0 V designs.	Select when system-level adjustability outweighs fixed-voltage simplicity and lower noise.
REF43 5.0	5.0 V fixed output, 3 ppm/°C max TC, 12 µV_rms noise, but 100 µA min current and SO8-8 pinout differs.	Targeted at metrology-grade instruments where ultra-low drift dominates cost and size constraints.	Choose only if TC and noise requirements exceed ZR40402N850TA's capabilities and budget permits premium grade.

Compared with TL431ACDR and REF43 5.0, the ZR40402N850TA offers optimal balance of fixed 5.0 V accuracy, micropower operation down to 60 µA, and SO8 compatibility-making it preferred for cost-sensitive, space-constrained, battery-powered precision analog systems where <10 µs settling and capacitor-free stability are mandatory.

Availability

ZR40402N850TA is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and industrial sensor transmitters requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZR40402N850TA 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 emphasis on power management, signal integrity, and precision analog solutions.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability shunt references in portable, industrial, and test equipment applications.

FAQ

Is ZR40402N850TA a three-terminal or two-terminal device?

ZR40402N850TA is a two-terminal shunt voltage reference: cathode and anode only. The SO8 package has six no-connect pins per datasheet; only pins 1 (cathode) and 2 (anode) are electrically functional. No third terminal exists for adjustment or enable control.

Can ZR40402N850TA operate without an external series resistor?

No-it requires an external series resistor between the supply rail and cathode to set operating current within 60 µA–15 mA. Omitting this resistor risks exceeding absolute maximum ratings or failing to reach regulation; resistor value is determined by supply voltage and desired sink current.

What is the maximum capacitive load ZR40402N850TA can drive stably?

The device is stable with any capacitive load, including 10 µF ceramic or tantalum decoupling capacitors directly at the cathode node. This eliminates need for isolation resistors or ferrite beads-verified per Figure 4-182 transient response plots and "stable with capacitive loads" feature statement.

Does ZR40402N850TA support operation below −40°C or above +85°C?

No-its specified operating temperature range is strictly −40°C to +85°C. While storage extends to −55°C/+125°C, electrical parameters (e.g., TC, VR drift) are not characterized outside the industrial range, and extended operation may cause irreversible parametric shift or failure.

ZR40402N850TA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

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:: ±2%

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:: 8-SO

ZR40402N850TA FAQ

1.How can I place an order for ZR40402N850TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40402N850TA 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 ZR40402N850TA reliable?

The price and inventory of ZR40402N850TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40402N850TA is usually 5 days.

3.What payment methods are accepted for ZR40402N850TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40402N850TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40402N850TA?

ZR40402N850TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40402N850TA 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 ZR40402N850TA?

For technical support, including ZR40402N850TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40402N850TA requirements.

6.How does Aetrix verify that ZR40402N850TA is sourced from the original manufacturer or authorized distributors?

All ZR40402N850TA 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 ZR40402N850TA meets industry standards.

7.What is the process for return or replacement of ZR40402N850TA?

All ZR40402N850TA units undergo pre-shipment inspection (PSI). If there is an issue with ZR40402N850TA, 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 ZR40402N850TA part is unused and in its original packaging.

Return procedure for ZR40402N850TA:

1.Submit a request within 90 days.

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

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