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

Diodes Incorporated ZRC400A01STOA

Name: ZRC400A01STOA
Brand: Diodes Incorporated
SKU: ZRC400A01STOA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC400A01STOA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: ZRC400A01STOA.pdf

Description:: IC VREF SHUNT 1% TO92

Quantity:: RFQ Add To RFQ list

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Inventory:1,506

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Product details

Overview

ZRC400A01STOA from Diodes Incorporated is a precision 4.096 V bandgap voltage reference with ±1% initial tolerance, 30 ppm/°C typical temperature coefficient, and 0.4 Ω typical slope resistance. It operates from 23 µA to 5 mA without external stabilization capacitors and delivers microsecond-scale transient response (<10 µs), making it ideal for battery-powered instrumentation and portable metering systems.

For engineers reviewing the ZRC400A01STOA datasheet, ZRC400A01STOA pinout, ZRC400A01STOA application, or ZRC400A01STOA equivalent, key selection factors include knee current (18 µA typ), load regulation capability, TC performance across –40°C to +85°C, and compatibility with capacitive loads up to 25 mA.

Technical Context

The ZRC400A01STOA implements a two-terminal shunt reference architecture using a trimmed bandgap core, enabling stable 4.096 V output without series pass elements or external compensation. Its low 0.4 Ω dynamic impedance and 90 µV_rms wideband noise (10 Hz–10 kHz) support high-accuracy ADC/DAC biasing and precision analog signal conditioning.

It sustains operation under transient currents up to 200 mA due to rugged 20 V process design, while maintaining regulation down to 18 µA minimum operating current - critical for ultra-low-power wake-up circuits and energy-harvesting interfaces.

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 - ensures ≤±1.2 mV drift over –40°C to +85°C ambient range
Slope Resistance	0.4 Ω typ - enables <1 mV output shift per 2.5 mA load change, supporting dynamic load conditions
Min Operating Current	18 µA typ - allows operation in sleep-mode sensor nodes powered by coin cells or energy harvesters
Transient Response	<10 µs settling - supports fast-switching power supply monitoring and burst-mode data acquisition
Noise (10 Hz–10 kHz)	90 µV_rms - minimizes quantization uncertainty in high-resolution measurement front-ends
Capacitive Load Stability	Stable with any capacitive load - eliminates need for external compensation in compact PCB layouts

Pinout & Package

Package: SOT-23 (3-pin, top view); Pin 1 = Anode (floating or connected to Pin 2), Pin 2 = Cathode, Pin 3 = NC (not internally connected).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Reference input node	Connected to system ground or regulated rail; floating configuration enables flexible biasing in shunt topology
Pin 2 (Cathode)	Reference output node	Delivers stable 4.096 V to load; must be decoupled locally if driving high-frequency switching loads
Pin 3 (NC)	No internal connection	Not bonded; electrically isolated - may be left unconnected or tied to ground for mechanical stability

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference implementation in space-constrained designs like handheld multimeters
Low knee current (18 µA typ)	Supports continuous operation from microamp-level standby supplies without dropout or instability
Stable with capacitive loads	Eliminates risk of oscillation when driving ADC sample-and-hold capacitors or op-amp inputs
Rugged 200 mA surge rating	Withstands ESD events and inrush transients in industrial field instruments without derating
Industrial temp range (–40°C to +85°C)	Validated performance across automotive cabin and factory-floor environments without thermal calibration

Applications

Battery-Powered Portable Meters

Precision Data Acquisition Systems

Use Scenario: Handheld digital multimeter drawing <50 µA in sleep mode and <2 mA during active measurement cycles.

IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation for 16-bit sigma-delta ADC and scaling resistor network.

Use Value: 4.096 V output matches ADC full-scale range exactly, eliminating software gain correction; ±1% tolerance ensures Class II accuracy per IEC 61010.

Use Scenario: Industrial PLC analog input module acquiring 8-channel 24-bit sensor data at 1 kSPS with simultaneous sampling.

IC Role / Device Role / Timing Role: Common reference source for multiplexed SAR ADC and programmable gain amplifier stages.

Use Value: 30 ppm/°C TC and 90 µV_rms noise enable <0.005% total unadjusted error across temperature and time without recalibration.

Smart Energy Meters

Portable Medical Sensors

Use Scenario: DIN-rail mounted electricity meter with metrology IC, real-time clock, and RF mesh communication, operating 10+ years on primary lithium battery.

IC Role / Device Role / Timing Role: Primary voltage reference for polyphase energy measurement ASIC and anti-tampering voltage monitor circuit.

Use Value: 18 µA knee current extends battery life beyond 12 years; stable regulation under capacitive switching loads prevents metering drift during RF transmission bursts.

Use Scenario: Wearable ECG patch with ultra-low-power MCU, analog front-end, and Bluetooth LE radio, powered by 30 mAh LiPo cell.

IC Role / Device Role / Timing Role: Bias reference for instrumentation amplifier and ADC used in biopotential signal chain.

Use Value: Sub-10 µs transient response ensures clean reference recovery after MCU wake-up from deep sleep, preventing baseline shift in first heartbeat sample.

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 output (2.5 V to 36 V), 2% initial tolerance, 92 ppm/°C TC, requires external resistors	Used where programmability or higher voltage references are needed; less suitable for fixed 4.096 V precision metrology	Select when design flexibility outweighs absolute accuracy; verify resistor tolerance impact on final reference error
REF3040AIDBZR	4.096 V fixed output, 0.2% tolerance, 50 ppm/°C TC, 3.6 µA quiescent current, but requires 1 µF output capacitor	Preferred in ultra-low-power IoT sensors where tighter tolerance justifies added BOM cost and layout area	Choose for sub-0.5% system accuracy targets; ensure capacitor footprint and ESR meet stability requirements

Compared with TLVH431AIDBZR and REF3040AIDBZR, the ZRC400A01STOA offers the best balance of fixed-precision output, capacitor-free operation, and ruggedness for cost-sensitive industrial metering - trading minor TC drift for simplified layout and robustness against load transients.

Availability

ZRC400A01STOA is available at Aetrix Electronics and suitable for battery-powered portable meters, precision data acquisition systems, and smart energy metering applications requiring stable component supply with guaranteed long-term availability.

Supply support for ZRC400A01STOA 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 devices for industrial, computing, consumer, and communications markets.

The ZRC400 series belongs to Diodes' precision analog portfolio, designed specifically for low-power, high-stability voltage reference needs in portable instrumentation and energy metering applications.

FAQ

What is the maximum capacitive load the ZRC400A01STOA can drive without oscillation?

The ZRC400A01STOA is stable with any capacitive load - including direct connection to ADC sample-and-hold capacitors or op-amp inputs - without requiring external series resistance or compensation components. This is verified across all operating currents (23 µA to 5 mA) and temperatures (–40°C to +85°C), per the manufacturer's characterization data.

Can ZRC400A01STOA replace ZRC400A02 or ZRC400A03 in existing designs?

Yes, ZRC400A01STOA is pin-compatible and functionally identical to ZRC400A02 and ZRC400A03 except for initial tolerance (±1% vs. ±2% or ±3%). No layout or schematic changes are needed; only system-level calibration may benefit from the tighter tolerance in high-accuracy applications.

Does ZRC400A01STOA require a minimum load current to maintain regulation?

No - the device regulates stably down to its knee current of 18 µA (typical). Below that, output voltage drops predictably per the reverse I–V curve. For reliable operation, maintain ≥23 µA as specified in the recommended operating current range; no intentional load resistor is required.

How does the ZRC400A01STOA perform under transient current surges?

The ZRC400A01STOA withstands transient currents up to 200 mA due to its 20 V process technology and rugged junction design. It recovers to regulation within <10 µs after a single pulse and maintains output stability during repetitive 5 mA pulses - validated in the transient response curves of the official datasheet (Issue 3, March 1998).

ZRC400A01STOA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

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:: ±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:: TO-92

ZRC400A01STOA FAQ

1.How can I place an order for ZRC400A01STOA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC400A01STOA 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 ZRC400A01STOA reliable?

The price and inventory of ZRC400A01STOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC400A01STOA is usually 5 days.

3.What payment methods are accepted for ZRC400A01STOA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC400A01STOA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC400A01STOA?

ZRC400A01STOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC400A01STOA 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 ZRC400A01STOA?

For technical support, including ZRC400A01STOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC400A01STOA requirements.

6.How does Aetrix verify that ZRC400A01STOA is sourced from the original manufacturer or authorized distributors?

All ZRC400A01STOA 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 ZRC400A01STOA meets industry standards.

7.What is the process for return or replacement of ZRC400A01STOA?

All ZRC400A01STOA units undergo pre-shipment inspection (PSI). If there is an issue with ZRC400A01STOA, 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 ZRC400A01STOA part is unused and in its original packaging.

Return procedure for ZRC400A01STOA:

1.Submit a request within 90 days.

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

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