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

Diodes Incorporated ZRC400F02TC

Name: ZRC400F02TC
Brand: Diodes Incorporated
SKU: ZRC400F02TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC400F02TC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZRC400F02TC.pdf

Description:: IC VREF SHUNT 2% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:4,667

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Product details

Overview

ZRC400F02TC from Diodes Incorporated is a precision 4.096 V bandgap voltage reference IC in SOT23-3 package, featuring 2% initial tolerance, 30 ppm/°C typical temperature coefficient, and 0.4 Ω typical slope resistance. It operates from 23 µA to 5 mA, requires no external stabilization capacitor, and achieves stable output in under 10 µs-ideal for low-power data acquisition front-ends.

For engineers reviewing the ZRC400F02TC datasheet, ZRC400F02TC pinout, ZRC400F02TC application, or ZRC400F02TC equivalent, key selection criteria include knee current (18 µA typ), load regulation performance, transient response time, and compatibility with capacitive loads without oscillation.

Technical Context

The ZRC400F02TC implements a two-terminal shunt topology with internal bandgap core, delivering fixed 4.096 V reverse breakdown voltage across –40°C to +85°C. Its low 0.4 Ω slope resistance ensures minimal output voltage shift under varying load current (23 µA–5 mA).

Designed for direct replacement of Zener diodes in precision references, it eliminates need for external compensation while maintaining stability with up to 1 µF capacitive load. Transient recovery time <10 µs supports fast-sampling ADC biasing and portable metering power rails.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	4.096 V ±2% - precise reference for 12-bit DAC/ADC systems requiring 1 LSB accuracy at 4.096 V full-scale.
Initial Tolerance	±2% - enables single-point calibration in portable multimeters without trimming potentiometers.
Temp Coefficient	30 ppm/°C typ - contributes ≤1.0 mV drift over 0–70°C ambient, suitable for industrial-grade instrumentation.
Min Operating Current	23 µA - allows operation from microcontroller GPIO pins or ultra-low-power LDOs in battery-backed sensors.
Slope Resistance	0.4 Ω typ - limits output voltage variation to <2 mV when load current changes by 5 mA.
Transient Response	<10 µs to settle - supports rapid power-up sequencing in handheld test equipment with multi-rail supplies.
Wideband Noise	90 µV_rms (10 Hz–10 kHz) - meets noise floor requirements for 16-bit sigma-delta ADC reference inputs.

Pinout & Package

SOT23-3 package (JEDEC MO-178AA), 2.80–3.04 mm × 2.10–2.64 mm × 1.12 mm height, gull-wing leads, RoHS-compliant "Green" molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Current sink input	Connected to regulated supply rail; sets operating current via series resistor.
Cathode (Pin 2)	Reference output	Provides stable 4.096 V output referenced to ground; connects to ADC REF+ or op-amp non-inverting input.
NC / Floating (Pin 3)	No-connect terminal	Internally unconnected; must remain unconnected per datasheet to avoid parametric shift or instability.

Key Features

Feature	Design Value
No external capacitor required	Enables PCB space reduction in compact medical sensors and wearables where layout area is constrained to <5 mm².
Low knee current (18 µA typ)	Permits biasing from high-impedance sources such as thermistor-divider networks without loading error.
Stable with capacitive loads	Supports direct connection to 0.1–1 µF ceramic bypass caps on ADC reference pins without phase margin loss.
Rugged 200 mA surge rating	Withstands ESD events and inrush transients during hot-plug insertion in modular test fixtures.
Industrial temp range (–40°C to +85°C)	Validated for continuous operation in outdoor metering enclosures exposed to solar heating and cold start conditions.

Applications

Battery-Powered Multimeters

Portable Gas Analyzers

Use Scenario: Handheld digital multimeter measuring DC voltage with 0.1% accuracy over 0–50°C ambient.

IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing stable 4.096 V reference for 12-bit SAR ADC and LCD bias generator.

Use Value: Eliminates need for trimmer potentiometer and external filter cap, reducing BOM count by 2 components and saving 3.2 mm² PCB area.

Use Scenario: Portable electrochemical gas sensor module powered by coin cell, requiring stable bias for analog front-end amplifiers.

IC Role / Device Role / Timing Role: Low-current voltage reference supplying excitation voltage to sensor bridge and reference for ratiometric ADC conversion.

Use Value: 23 µA minimum operating current extends coin-cell life beyond 18 months; 10 µs settling enables fast sensor read cycles every 50 ms.

Smart Electricity Meters

Industrial Data Loggers

Use Scenario: DIN-rail mounted electricity meter performing Class 0.5 energy measurement under fluctuating grid voltage and temperature.

IC Role / Device Role / Timing Role: Primary reference for metrology ADC and real-time clock backup regulator, operating continuously at 85°C ambient.

Use Value: 30 ppm/°C TC and 2% tolerance ensure <0.05% total reference error across full temperature range, meeting IEC 62053-21 compliance.

Use Scenario: Ruggedized field logger recording temperature, humidity, and pressure using 16-bit sigma-delta ADCs over extended deployment periods.

IC Role / Device Role / Timing Role: Low-noise (90 µV_rms) reference source shared across multiple ADC channels and precision op-amp gain stages.

Use Value: 0.4 Ω slope resistance prevents channel-to-channel crosstalk during simultaneous sampling; 90 µV noise avoids degrading effective resolution below 15.5 ENOB.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDBVR	Adjustable output (2.5 V min), higher 1 mA min operating current, 20 ppm/°C TC	Requires two external resistors for 4.096 V setting; less suitable for space-constrained layouts	Choose when adjustable reference or tighter TC is prioritized over board area and ultra-low current operation
MAX6008AEUR+T	Fixed 4.096 V, 0.5% tolerance, 20 ppm/°C TC, but requires 10 µF output capacitor for stability	Higher accuracy but adds capacitor footprint and risk of instability with small ceramic caps	Choose when absolute accuracy >0.5% is mandatory and board space permits 10 µF tantalum capacitor

Compared with TL431ACDBVR and MAX6008AEUR+T, ZRC400F02TC offers the smallest PCB footprint and lowest quiescent current among 4.096 V shunt references, making it optimal for size- and battery-life–critical designs where ±2% tolerance is acceptable.

Availability

ZRC400F02TC is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable test equipment, and smart metering systems requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZRC400F02TC 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, serving industrial, computing, consumer, and communications markets since 1960.

The ZRC series targets cost-sensitive, space-constrained precision analog applications-specifically replacing Zener diodes in portable and battery-operated measurement systems where low knee current and capacitor-free operation are essential.

FAQ

What is the maximum capacitive load the ZRC400F02TC can drive without oscillation?

The ZRC400F02TC is stable with capacitive loads up to 1 µF, as confirmed in the DS32164 datasheet Figure 9 (Load Capacitance vs. Phase Margin). This includes standard 0.1 µF ceramic decoupling capacitors commonly used on ADC reference pins, eliminating need for series isolation resistors or ferrite beads.

Can Pin 3 be grounded or tied to Cathode to improve thermal performance?

No-Pin 3 is internally unconnected (NC) and must remain floating or open-circuit. Grounding or shorting Pin 3 to Cathode violates the device's internal structure and causes unpredictable shifts in output voltage and temperature coefficient, as explicitly stated in the "Pin Assignments" section of DS32164 Rev. 5-2.

Is ZRC400F02TC suitable for use in automotive applications?

ZRC400F02TC is rated for –40°C to +85°C operation and qualified to AEC-Q200 stress test standards for passive components, but Diodes Incorporated does not qualify it for automotive under AEC-Q100. It is approved for industrial and commercial use only; automotive designs require explicit qualification documentation not provided for this part.

How does the 2% tolerance affect system calibration in a 12-bit ADC design?

At 4.096 V full-scale, ±2% tolerance equals ±82 mV, or ±20 LSBs of a 12-bit code. This is typically compensated via one-time factory calibration using the ADC's built-in offset/gain registers, enabling final system accuracy to meet 0.1% specifications without hardware trimming.

ZRC400F02TC 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:: 5 mA

Tolerance:: ±2%

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:: Surface Mount

Supplier Device Package:: SOT-23-3

ZRC400F02TC FAQ

1.How can I place an order for ZRC400F02TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC400F02TC 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 ZRC400F02TC reliable?

The price and inventory of ZRC400F02TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC400F02TC is usually 5 days.

3.What payment methods are accepted for ZRC400F02TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC400F02TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC400F02TC?

ZRC400F02TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC400F02TC 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 ZRC400F02TC?

For technical support, including ZRC400F02TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC400F02TC requirements.

6.How does Aetrix verify that ZRC400F02TC is sourced from the original manufacturer or authorized distributors?

All ZRC400F02TC 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 ZRC400F02TC meets industry standards.

7.What is the process for return or replacement of ZRC400F02TC?

All ZRC400F02TC units undergo pre-shipment inspection (PSI). If there is an issue with ZRC400F02TC, 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 ZRC400F02TC part is unused and in its original packaging.

Return procedure for ZRC400F02TC:

1.Submit a request within 90 days.

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

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