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

Diodes Incorporated ZRC400F02TA

Name: ZRC400F02TA
Brand: Diodes Incorporated
SKU: ZRC400F02TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC400F02TA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZRC400F02TA.pdf

Description:: IC VREF SHUNT 2% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:7,783

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Product details

Overview

ZRC400F02TA 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, 0.4 Ω typical slope resistance, and operation from 23 μA to 5 mA-designed for low-power ADC/DAC biasing in portable instrumentation.

For engineers reviewing the ZRC400F02TA datasheet, ZRC400F02TA pinout, ZRC400F02TA application, or ZRC400F02TA equivalent, key selection criteria include knee current (18 μA typ), transient stability (<10 μs), no external capacitor requirement, and industrial temperature range (–40°C to +85°C).

Technical Context

The ZRC400F02TA implements a two-terminal shunt topology with internal bandgap core, delivering stable reverse breakdown voltage without external compensation. Its low dynamic impedance (0.3 Ω typ at 100 Hz) and wideband noise of 90 μV_rms (10 Hz–10 kHz) support high-resolution analog signal chains.

It operates as a 2-terminal device with floating or grounded anode configuration, rated for 200 mA surge current and 20 V processing voltage. The design maintains regulation across load currents from 23 μA to 25 mA while sustaining 1% total error over temperature and line variations.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	4.096 V ±2% - precise mid-scale reference for 12-bit ADCs and DACs requiring 4.096 V full-scale alignment.
Initial Tolerance	±2% - ensures output accuracy without post-manufacturing trimming in cost-sensitive metering designs.
Temp Coefficient	30 ppm/°C typ - limits drift to ±2.5 mV over –40°C to +85°C, enabling stable calibration in field-deployed test equipment.
Knee Current	18 μA typ - enables reliable turn-on at ultra-low power, critical for battery-backed real-time clocks and sensor sleep modes.
Slope Resistance	0.4 Ω typ - minimizes load-induced voltage shift under varying current draw, preserving reference integrity in multiplexed analog front-ends.
Transient Response	<10 μs - achieves regulation within one sample period of 100 kSPS ADCs, eliminating settling delay in fast acquisition systems.
Noise (10 Hz–10 kHz)	90 μV_rms - contributes <0.2 LSB error in 16-bit systems, supporting high-fidelity measurement without external filtering.

Pinout & Package

SOT23-3 package (JEDEC MO-178AA), 2.80–3.04 mm × 2.10–2.64 mm footprint, 1.12 mm max height, with gull-wing leads. Pin 1 is anode (input), Pin 2 is cathode (output/reference), Pin 3 is NC or connected to anode per E-Line variant-ZRC400F02TA uses standard SOT23 pinout with Pin 1 anode, Pin 2 cathode, Pin 3 not internally connected.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Current input terminal	Accepts regulated current from series resistor; must be biased above cathode by ≥4.096 V to maintain regulation.
Pin 2 (Cathode)	Reference output node	Provides stable 4.096 V relative to ground when current flows through Pin 1; serves as voltage source for ADC REF+ or op-amp bias.
Pin 3 (NC)	No internal connection	Not bonded; electrically isolated-may be left unconnected or tied to cathode for mechanical stability in PCB layout.

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference implementation in space-constrained PCBs, eliminating capacitor BOM cost and placement error risk.
Low knee current (18 μA typ)	Permits use with high-value bias resistors (>1 MΩ) in coin-cell-powered devices, extending battery life beyond 5 years in standby.
Stable with capacitive loads	Supports direct connection to ADC reference inputs with 10 nF–100 nF sampling capacitors without oscillation or overshoot.
Rugged 200 mA surge rating	Withstands ESD events and inrush transients in industrial I/O modules without external protection diodes or fuses.
Green molding compound	Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 (MSL1), enabling lead-free reflow compatibility.

Applications

Portable Multimeter Reference

Battery-Operated Data Logger

Use Scenario: Handheld digital multimeter requiring stable 4.096 V reference for 12-bit SAR ADC to resolve 1 mV steps across 4 V range.

IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing precision bias to ADC REF+ input and analog front-end op-amps.

Use Value: 2% initial tolerance and 30 ppm/°C TC ensure <±0.5% full-scale error over operating temperature, meeting Class II DMM accuracy standards.

Use Scenario: Remote environmental sensor node powered by CR2032 coin cell, logging temperature/humidity every 10 seconds.

IC Role / Device Role / Timing Role: Low-knee-current voltage reference powering ADC and microcontroller VREF, activated only during sampling bursts.

Use Value: 18 μA knee current allows operation with 220 kΩ bias resistor, drawing just 0.9 μA average current-extending battery life to >3 years.

Industrial Panel Meter

Calibration Equipment Reference

Use Scenario: DIN-rail mounted 4–20 mA loop-powered panel meter with local display and analog input scaling.

IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit sigma-delta ADC measuring loop current via precision shunt resistor.

Use Value: 0.4 Ω slope resistance limits reference shift to <100 μV under 25 mA loop current variation, ensuring <0.0025% reading error.

Use Scenario: Benchtop calibrator generating programmable DC voltages from 0–10 V with 100 μV resolution.

IC Role / Device Role / Timing Role: Stable 4.096 V reference feeding multiplying DAC and precision op-amp gain stages.

Use Value: 90 μV_rms wideband noise contributes <0.001% RMS uncertainty, supporting metrology-grade traceability to NIST standards.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431AIDBZR	Adjustable (2.5–36 V) vs. fixed 4.096 V; 0.5% tolerance; 90 ppm/°C TC; requires external resistor divider.	Used where programmable reference or tighter initial tolerance is needed; higher TC increases drift in wide-temp environments.	Select when system requires adjustable output or better than 2% accuracy; accept added component count and thermal mismatch risk.
LM4040CIM3-4.1	Fixed 4.096 V; 0.5% tolerance; 100 ppm/°C TC; 75 μV_rms noise; 60 μA min operating current.	Higher knee current limits use in sub-10 μA sleep modes; lower noise benefits ultra-high-resolution systems.	Select for improved accuracy and lower noise where supply current >60 μA is available and board space permits SOIC-3.

Compared with TLVH431AIDBZR and LM4040CIM3-4.1, ZRC400F02TA offers lowest knee current and smallest footprint but trades off initial accuracy and noise performance-ideal for space- and power-constrained portable instruments where ±2% tolerance is acceptable.

Availability

ZRC400F02TA is available at Aetrix Electronics and suitable for portable instrumentation, battery-operated data loggers, and industrial panel meters requiring stable component supply with long-term sourcing continuity.

Supply support for ZRC400F02TA 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, specializing in high-reliability power management, signal integrity, and precision analog solutions.

The ZRC400 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, space-constrained applications demanding stable 4.096 V references without external components.

FAQ

Is ZRC400F02TA a three-terminal or two-terminal device?

ZRC400F02TA is a two-terminal shunt voltage reference: Pin 1 (anode) and Pin 2 (cathode) form the functional terminals; Pin 3 is not internally connected and may be left floating or tied to Pin 1 for mechanical reinforcement. It operates like a precision Zener diode with controlled breakdown characteristics.

Can ZRC400F02TA drive a 10 nF capacitive load directly?

Yes-ZRC400F02TA is explicitly characterized as stable with capacitive loads and requires no external compensation. Its internal design ensures monotonic step response and absence of ringing when driving typical ADC reference input capacitances up to 100 nF, verified per DS32164 Rev. 5–2.

What is the maximum continuous current ZRC400F02TA can handle?

ZRC400F02TA is rated for continuous operation up to 5 mA per datasheet recommendation, with absolute maximum forward current of 25 mA. While it withstands 200 mA surge transients, sustained current above 5 mA risks exceeding 330 mW power dissipation in SOT23 at ambient temperatures >25°C, potentially degrading long-term stability.

Does ZRC400F02TA require a heatsink in standard PCB layouts?

No-ZRC400F02TA's SOT23-3 package has sufficient thermal resistance (θ_JA ≈ 220°C/W) to dissipate up to 330 mW at 25°C ambient without heatsinking. At its recommended 5 mA operating current and 4.096 V drop, power dissipation is only 20.5 mW, resulting in negligible temperature rise (<5°C) on standard FR-4 with 1 oz copper.

ZRC400F02TA 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:: Active

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

ZRC400F02TA FAQ

1.How can I place an order for ZRC400F02TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC400F02TA 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 ZRC400F02TA reliable?

The price and inventory of ZRC400F02TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC400F02TA is usually 5 days.

3.What payment methods are accepted for ZRC400F02TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC400F02TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC400F02TA?

ZRC400F02TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC400F02TA 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 ZRC400F02TA?

For technical support, including ZRC400F02TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC400F02TA requirements.

6.How does Aetrix verify that ZRC400F02TA is sourced from the original manufacturer or authorized distributors?

All ZRC400F02TA 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 ZRC400F02TA meets industry standards.

7.What is the process for return or replacement of ZRC400F02TA?

All ZRC400F02TA units undergo pre-shipment inspection (PSI). If there is an issue with ZRC400F02TA, 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 ZRC400F02TA part is unused and in its original packaging.

Return procedure for ZRC400F02TA:

1.Submit a request within 90 days.

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

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