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

Diodes Incorporated ZRC400A01

Name: ZRC400A01
Brand: Diodes Incorporated
SKU: ZRC400A01
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC400A01

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZRC400A01.pdf

Description:: IC VREF SHUNT 1% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:3,592

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Product details

Overview

ZRC400A01 from Diodes Incorporated is a precision micropower 4.096 V bandgap voltage reference in E-Line (TO-92) 3-pin package, with ±1% initial tolerance, 30 ppm/°C typical temperature coefficient, and stable operation from 23 µA to 5 mA. It requires no external capacitor, achieves <10 µs transient settling, and is rated for industrial temperature range (−40°C to +85°C), making it ideal for battery-powered metering and portable instrumentation.

For engineers reviewing the ZRC400A01 datasheet, ZRC400A01 pinout, ZRC400A01 application, or ZRC400A01 equivalent, key selection criteria include knee current (18 µA typ), slope resistance (0.4 Ω typ), load regulation stability, TC performance across temperature, and compatibility with capacitive loads without compensation.

Technical Context

The ZRC400A01 operates as a two-terminal shunt voltage reference, sinking current through its cathode to maintain a precise 4.096 V reverse breakdown voltage. Its bandgap core delivers low drift and high PSRR, with slope resistance of 0.4 Ω enabling tight regulation under varying load currents from 23 µA to 5 mA.

It exhibits fast transient response (<10 µs to settle within 0.1% of final value) and maintains stability with capacitive loads up to 1 µF-no external capacitor required. Absolute maximum ratings include 20 V reverse voltage and 200 mA surge current tolerance, supporting robust operation in noisy or transient-prone environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	4.096 V ±1% at 150 µA, enabling accurate ADC/DAC biasing in 12-bit systems
Initial Tolerance	±1% (ZRC400A01 suffix), reducing calibration overhead in production test
Temp Coefficient	30 ppm/°C typical, limiting full-range drift to ±2.4 mV over −40°C to +85°C
Knee Current	18 µA typical, allowing operation down to ultra-low-power sleep modes
Slope Resistance	0.4 Ω typical, ensuring <0.5 mV output shift per 1 mA load change
Transient Settling	<10 µs to 0.1%, supporting rapid wake-up and sampling in duty-cycled systems
Capacitive Load Stability	Stable with ≥0 pF to 1 µF, eliminating need for external compensation components

Pinout & Package

E-Line (TO-92) 3-pin package with pin 3 floating or connected to pin 1 per datasheet revision - standard through-hole mounting, 500 mW power dissipation at 25°C ambient.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (Pin 1)	Reference output node	Connected to load and feedback network; sinks current to regulate 4.096 V
Anode (Pin 2)	Ground reference	Common return path; must be low-impedance for stable regulation
Pin 3	No-connect or tied to Pin 1	Internally unused; datasheet permits floating or connection to cathode for mechanical stability

Key Features

Feature	Design Value
No external capacitor required	Enables minimal BOM count and PCB area savings in space-constrained designs
Low knee current (18 µA typ)	Supports continuous regulation during microcontroller deep-sleep states
Stable with capacitive loads up to 1 µF	Allows direct interface with ADC input filters or LDO bypass caps without oscillation risk
Transient response <10 µs	Permits use in fast-sampling data acquisition systems without added delay
Rugged 200 mA surge rating	Withstands ESD events and inrush transients without degradation or latch-up

Applications

Portable Multimeters

Battery-Powered Data Loggers

Use Scenario: Handheld digital multimeter requiring stable 4.096 V reference for 12-bit SAR ADC scaling.

IC Role / Device Role / Timing Role: Shunt voltage reference providing ratiometric accuracy against supply variations.

Use Value: ±1% tolerance and 30 ppm/°C TC ensure measurement repeatability across battery discharge and ambient temperature shifts.

Use Scenario: Low-duty-cycle environmental sensor node logging temperature/humidity every 5 minutes.

IC Role / Device Role / Timing Role: Precision reference for analog front-end during brief active measurement windows.

Use Value: 18 µA knee current enables regulation during 100 µA system sleep current, preserving accuracy without wake-up delay.

Industrial Panel Meters

Calibration Equipment

Use Scenario: DIN-rail mounted 4–20 mA transmitter with local display and analog output conditioning.

IC Role / Device Role / Timing Role: Stable excitation source for RTD bridge and reference for DAC-controlled output stage.

Use Value: 0.4 Ω slope resistance minimizes gain error when driving op-amp inputs across varying loop loads.

Use Scenario: Benchtop calibrator verifying 4–20 mA transmitters and process sensors.

IC Role / Device Role / Timing Role: Primary voltage standard traceable to internal 4.096 V reference for DAC code verification.

Use Value: <10 µs transient response allows rapid step testing of downstream DUT settling behavior.

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 output, adjustable via resistive divider; higher minimum cathode current (1 mA)	Requires external resistors for 4.096 V setting; less suitable for ultra-low-power sleep modes	Select if adjustable output or higher current drive is needed; not drop-in for fixed 4.096 V use
REF43 4.096	4.096 V fixed output, 10 ppm/°C max TC, but requires 100 µA min operating current	Superior TC but incompatible with sub-100 µA systems; SO-8 only, no TO-92 option	Choose for metrology-grade stability where power budget allows ≥100 µA continuous draw

Compared with TL431ACDBZR and REF43 4.096, the ZRC400A01 uniquely combines fixed 4.096 V, ±1% tolerance, TO-92 through-hole compatibility, and 18 µA knee current-enabling direct replacement in legacy metering designs without circuit redesign or layout change.

Availability

ZRC400A01 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and industrial panel meters requiring stable component supply with long lifecycle visibility and consistent parametric performance.

Supply support for ZRC400A01 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, focused on high-reliability, cost-optimized components for industrial, computing, and consumer markets.

The ZRC400 series belongs to Diodes' precision voltage reference product line, designed specifically for space- and power-constrained measurement systems needing stable, low-drift, capacitor-free references in legacy-compatible packages.

FAQ

What is the minimum operating current for reliable regulation of ZRC400A01?

The ZRC400A01 begins regulating at 18 µA (typical knee current), but datasheet specifies 23 µA as the recommended minimum operating current for guaranteed 4.096 V output within ±1% tolerance across temperature. Operation below 23 µA may yield acceptable performance in controlled conditions but is not characterized for full-spec compliance.

Can ZRC400A01 drive a 10 nF capacitive load without oscillation?

Yes - the ZRC400A01 is explicitly characterized as stable with capacitive loads from 0 pF up to 1 µF, including 10 nF. No external series resistor or compensation network is required, unlike many shunt references that demand RC damping for stability at such values.

Is pin 3 of the E-Line (TO-92) package electrically connected internally?

No - pin 3 is internally unconnected. The datasheet states it may be left floating or tied to pin 1 (cathode) for mechanical reinforcement during board assembly or reflow. Electrical functionality is fully defined by pins 1 (cathode) and 2 (anode) only.

How does ZRC400A01 behave under transient overcurrent conditions?

The ZRC400A01 withstands transient forward currents up to 200 mA due to rugged 20 V processing. During such events, it remains functional without latch-up or parameter shift, provided average power dissipation stays within 500 mW (TO-92) limits and junction temperature remains below 150°C. Recovery is immediate upon current normalization.

ZRC400A01 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: E-Line-3

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 4.096V

Voltage - Output (Max):: -

Current - Output:: 5 mA

Tolerance:: ±1%

Temperature Coefficient:: 90ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 90µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 23 µA

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

ZRC400A01 FAQ

1.How can I place an order for ZRC400A01 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC400A01 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 ZRC400A01 reliable?

The price and inventory of ZRC400A01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC400A01 is usually 5 days.

3.What payment methods are accepted for ZRC400A01?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC400A01 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC400A01?

ZRC400A01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC400A01 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 ZRC400A01?

For technical support, including ZRC400A01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC400A01 requirements.

6.How does Aetrix verify that ZRC400A01 is sourced from the original manufacturer or authorized distributors?

All ZRC400A01 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 ZRC400A01 meets industry standards.

7.What is the process for return or replacement of ZRC400A01?

All ZRC400A01 units undergo pre-shipment inspection (PSI). If there is an issue with ZRC400A01, 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 ZRC400A01 part is unused and in its original packaging.

Return procedure for ZRC400A01:

1.Submit a request within 90 days.

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

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