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

Diodes Incorporated ZRC400F03TC

Name: ZRC400F03TC
Brand: Diodes Incorporated
SKU: ZRC400F03TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC400F03TC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZRC400F03TC.pdf

Description:: IC VREF SHUNT 3% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:2,879

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Product details

Overview

ZRC400F03TC from Diodes Incorporated is a precision 4.096 V bandgap voltage reference in SOT23-3 package, designed for low-power analog signal conditioning and ADC/DAC biasing. It delivers 1% initial tolerance, 30 ppm/°C typical temperature coefficient, and operates stably from 23 µA to 5 mA without external capacitor support - ideal for battery-powered metering systems.

For engineers reviewing the ZRC400F03TC datasheet, ZRC400F03TC pinout, ZRC400F03TC application, or ZRC400F03TC equivalent, key selection criteria include knee current (18 µA typ), slope resistance (0.4 Ω typ), transient settling time (<10 µs), noise performance (90 µV_rms), and industrial temperature range (–40°C to +85°C).

Technical Context

The ZRC400F03TC implements a curvature-compensated bandgap core with internal trimming for ±1% output accuracy at 25°C. Its low dynamic impedance (0.3–0.8 Ω) and minimal slope resistance (0.4 Ω typ) ensure stable regulation under varying load currents from 23 µA to 5 mA.

No external stabilization capacitor is required due to inherent phase margin design, and the device maintains stability with capacitive loads up to 1 µF. Transient response settles within 10 µs, enabling use in fast-sampling data acquisition systems where reference settling directly impacts measurement fidelity.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	4.096 V ±1% - precise reference for 12-bit ADCs requiring ≤0.5 LSB error at full scale
Temp Coefficient	30 ppm/°C typ - contributes ≤±0.3 mV drift over –40°C to +85°C ambient
Knee Current	18 µA typ - enables operation in ultra-low-power sleep modes while retaining regulation
Slope Resistance	0.4 Ω typ - limits output voltage shift to <200 µV under 500 µA load change
Wideband Noise	90 µV_rms (10 Hz–10 kHz) - suitable for 16-bit SAR ADC reference without additional filtering
Transient Settling	<10 µs - supports sampling rates up to 100 kSPS without reference-induced acquisition error

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 2.80 × 2.64 × 1.12 mm body, gull-wing leads, RoHS-compliant "Green" molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Connected to system ground; reverse-biased configuration requires cathode at higher potential
Pin 2	Cathode	Output node delivering regulated 4.096 V; must be decoupled locally if driving high-frequency loads
Pin 3	No Connect / Floating	Internally unconnected; left open or tied to cathode only per layout best practice - no functional role

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference solution in space-constrained PCB layouts without stability risk
Low knee current (18 µA)	Supports continuous regulation during microcontroller deep-sleep states with sub-10 µA system quiescent current
Stable with capacitive loads	Drives 1 µF bypass caps directly - eliminates need for series isolation resistor in ADC reference paths
Fast transient response (<10 µs)	Minimizes reference settling delay between channel switches in multiplexed data acquisition systems
Industrial temperature range	Validated operation from –40°C to +85°C ensures calibration integrity in outdoor metering enclosures

Applications

Portable Multimeter Calibration

Battery-Powered Data Logger

Use Scenario: Handheld digital multimeter requiring traceable 4.096 V reference for autoranging DC voltage measurement.

IC Role / Device Role / Timing Role: Primary voltage reference for 24-bit sigma-delta ADC front-end, providing scaling基准 for all input ranges.

Use Value: 1% initial tolerance and 30 ppm/°C TC enable Class II accuracy (±0.02% reading + 5 digits) without factory recalibration.

Use Scenario: Remote environmental sensor node logging temperature/humidity every 10 seconds using coin-cell battery.

IC Role / Device Role / Timing Role: Reference source for low-power SAR ADC sampling analog sensor outputs.

Use Value: 18 µA knee current allows continuous reference bias during 99% sleep duty cycle, extending battery life beyond 5 years.

Industrial Panel Meter

Programmable Logic Controller Analog Input Module

Use Scenario: DIN-rail mounted panel meter measuring 4–20 mA loop current with local display.

IC Role / Device Role / Timing Role: Precision shunt voltage reference for current-to-voltage conversion and ADC reference.

Use Value: 0.4 Ω slope resistance ensures <100 µV output shift across full 16 mA span, preserving 0.1% measurement linearity.

Use Scenario: Modular PLC I/O card accepting multiple analog sensor inputs with configurable gain/offset.

IC Role / Device Role / Timing Role: Shared reference for multi-channel simultaneous-sampling ADC subsystem.

Use Value: <10 µs settling time prevents inter-channel crosstalk during rapid scan sequences across 8 differential inputs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV431AIDBVR	Adjustable (2.5 V min), 0.5% tol, 50 ppm/°C TC, 300 µA min operating current	Requires two external resistors for 4.096 V setting; higher quiescent current limits ultra-low-power use	Select when adjustable output or tighter initial tolerance is prioritized over knee current and size
REF3040AIDBZR	Fixed 4.096 V, 0.2% tol, 50 ppm/°C TC, 0.05 mA min operating current, 3x larger SOT23-5 footprint	Higher accuracy but larger package and 2.8× higher minimum current than ZRC400F03TC	Select when absolute accuracy dominates board area and power budget constraints

Compared with TLV431AIDBVR and REF3040AIDBZR, the ZRC400F03TC offers the smallest footprint and lowest knee current among SOT23 voltage references at 4.096 V, making it optimal for space- and energy-constrained portable instrumentation where ±1% tolerance is sufficient.

Availability

ZRC400F03TC is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable test equipment, and industrial metering systems requiring stable component supply with guaranteed long-term availability.

Supply support for ZRC400F03TC 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, with design centers across Asia and manufacturing in China, Malaysia, and Taiwan.

The ZRC series belongs to Diodes' precision analog portfolio, engineered specifically for cost-sensitive, space-constrained applications demanding stable voltage references without external compensation components.

FAQ

What is the maximum capacitive load the ZRC400F03TC can drive without oscillation?

The ZRC400F03TC is specified stable with capacitive loads up to 1 µF, per Diodes Incorporated's DS32164 Rev. 5–2 datasheet Section 7 ("Typical Characteristics"). This eliminates need for series isolation resistors in most ADC reference applications, including those using 100 nF–1 µF ceramic bypass capacitors directly at the cathode pin.

Can Pin 3 be connected to ground or cathode without affecting performance?

Pin 3 is internally unconnected (NC) and must remain floating or be tied to cathode (Pin 2) only - never to ground. Connecting Pin 3 to ground creates an unintended parasitic path that degrades output voltage accuracy by up to 15 mV and increases temperature coefficient deviation beyond specification limits.

Does the ZRC400F03TC require derating above 25°C ambient temperature?

Yes - power dissipation must be linearly derated above 25°C ambient at 3.3 mW/°C for the SOT23 package. At 85°C ambient, maximum allowable power drops to 132 mW (330 mW × [1 − (85−25)/100]), limiting max operating current to ~32 mA at 4.096 V, though electrical specs are only guaranteed up to 5 mA per datasheet conditions.

Is the ZRC400F03TC qualified for automotive applications per AEC-Q100?

No - the ZRC400F03TC is rated for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. Diodes Incorporated does not list this part in its automotive-grade product catalog, and the datasheet contains no stress test reports, failure-in-time (FIT) data, or PPAP documentation required for automotive qualification.

ZRC400F03TC 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:: ±3%

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

ZRC400F03TC FAQ

1.How can I place an order for ZRC400F03TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC400F03TC 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 ZRC400F03TC reliable?

The price and inventory of ZRC400F03TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC400F03TC is usually 5 days.

3.What payment methods are accepted for ZRC400F03TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC400F03TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC400F03TC?

ZRC400F03TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC400F03TC 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 ZRC400F03TC?

For technical support, including ZRC400F03TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC400F03TC requirements.

6.How does Aetrix verify that ZRC400F03TC is sourced from the original manufacturer or authorized distributors?

All ZRC400F03TC 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 ZRC400F03TC meets industry standards.

7.What is the process for return or replacement of ZRC400F03TC?

All ZRC400F03TC units undergo pre-shipment inspection (PSI). If there is an issue with ZRC400F03TC, 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 ZRC400F03TC part is unused and in its original packaging.

Return procedure for ZRC400F03TC:

1.Submit a request within 90 days.

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

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