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

Diodes Incorporated ZRC400A03

Name: ZRC400A03
Brand: Diodes Incorporated
SKU: ZRC400A03
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC400A03

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZRC400A03.pdf

Description:: IC VREF SHUNT 3% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:3,559

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Product details

Overview

ZRC400A03 from Diodes Incorporated is a precision 4.096 V bandgap voltage reference with ±3% initial tolerance, 30 ppm/°C typical temperature coefficient, and 0.4 Ω typical slope resistance, operating from 23 µA to 5 mA-designed for low-power instrumentation and battery-powered metering systems.

For engineers reviewing the ZRC400A03 datasheet, ZRC400A03 pinout, ZRC400A03 application, or ZRC400A03 equivalent, key selection factors include knee current (18 µA typ), transient stability (<10 µs), capacitive-load immunity, and E-Line 3-pin through-hole package compatibility without external stabilization capacitor.

Technical Context

The ZRC400A03 implements a bandgap-based reverse-breakdown topology delivering a fixed 4.096 V reference voltage with no external capacitor required for stability. Its design supports operation across −40°C to +85°C and maintains regulation under capacitive loads up to 200 mA transient surge current.

It exhibits low dynamic impedance (0.3 Ω typ at 1 mA, 100 Hz), wideband noise of 90 µV_rms (10 Hz–10 kHz), and monotonic slope resistance behavior from 0.1 mA to 5 mA-enabling high-accuracy analog signal conditioning in portable test equipment.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	4.096 V nominal; ±3% initial tolerance ensures calibrated accuracy in 12-bit ADC biasing and DAC reference chains.
Temperature Coefficient	30 ppm/°C typical; enables ≤±1.2 mV drift over −40°C to +85°C for stable front-end gain-setting in portable meters.
Minimum Operating Current	18 µA typical; allows direct use with ultra-low-power microcontrollers (e.g., MSP430 LPM3) without current-boosting circuitry.
Slope Resistance	0.4 Ω typical; minimizes output voltage shift under load transients, critical for multiplexed sensor reference distribution.
Transient Response Time	<10 µs to stabilize; supports fast-switching power supply monitoring and burst-mode data acquisition systems.
Capacitive Load Stability	Stable with any capacitive load; eliminates need for series isolation resistor in noisy environments like motor-driven instrumentation.

Pinout & Package

E-Line 3-pin through-hole package (suffix R), with Pin 3 floating or connected to Pin 1 per datasheet revision; compact footprint ideal for legacy PCB layouts requiring axial lead replacement.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Input / Cathode connection point	Reverse-biased terminal accepting input current; tied to ground in standard shunt configuration.
Pin 2 (Cathode)	Reference Output	Delivers regulated 4.096 V when current flows from Pin 2 to Pin 1; connects to ADC REF+ or op-amp non-inverting input.
Pin 3 (NC or Anode Tie)	No-connect or Anode tie option	Internally unconnected unless bonded to Pin 1 per application need-used to reduce thermal resistance or improve layout symmetry.

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference design in space-constrained PCBs, eliminating BOM item and layout uncertainty.
Low knee current (18 µA typ)	Permits operation below 20 µA supply rails-critical for coin-cell-powered handheld multimeters and wireless sensors.
Stable with capacitive loads	Supports direct connection to 100 nF–10 µF decoupling caps on ADC reference pins without oscillation risk.
Transient response <10 µs	Allows real-time reference re-establishment after power cycling or sleep/wake transitions in portable data loggers.

Applications

Battery-Powered Multimeters

Portable Data Acquisition Units

Use Scenario: Handheld digital multimeter drawing <25 µA quiescent current during measurement standby.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.096 V for 16-bit sigma-delta ADC full-scale calibration.

Use Value: Enables ±0.1% DC voltage measurement accuracy across −10°C to +60°C ambient without recalibration.

Use Scenario: Wireless sensor node sampling thermocouple and RTD signals every 5 seconds using intermittent power gating.

IC Role / Device Role / Timing Role: Precision reference for dual-slope integrator and programmable-gain amplifier front-end.

Use Value: Maintains 12-bit effective resolution despite 15 µA average supply current and 85°C internal board temperature.

Industrial Panel Meters

Benchtop Calibration Standards

Use Scenario: DIN-rail mounted 4–20 mA loop-powered display with local analog inputs.

IC Role / Device Role / Timing Role: Reference source for 24-bit delta-sigma ADC and isolated DAC feedback path.

Use Value: Delivers 30 ppm/°C TC performance over full industrial temperature range without oven control or trimming.

Use Scenario: Portable bench calibrator generating precise 4.096 V outputs for field verification of DMMs and process controllers.

IC Role / Device Role / Timing Role: Primary voltage standard in closed-loop feedback architecture with laser-trimmed resistive divider.

Use Value: Achieves ±0.02% absolute accuracy traceable to NIST standards via factory calibration at 25°C and 85°C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDR	2.495 V nominal, adjustable via external resistors; 50 ppm/°C max TC; requires ≥1 mA cathode current.	Used where programmable reference voltage or higher current drive (>10 mA) is needed; not drop-in for fixed 4.096 V systems.	Select only if system already uses TL431-based feedback and 4.096 V can be derived with 0.5% resistor tolerance.
REF3040AIDBZR	4.096 V fixed, 50 ppm/°C max TC, 50 µA min operating current; SOT23-3 package.	Higher minimum current limits use in sub-50 µA sleep modes; better noise (35 µV_rms) but less transient robustness (25 mA abs max).	Prefer for new designs needing lower noise and surface-mount assembly; avoid in through-hole legacy or high-surge environments.

Compared with TL431ACDR and REF3040AIDBZR, the ZRC400A03 uniquely combines fixed 4.096 V output, 18 µA knee current, through-hole E-Line packaging, and 200 mA surge tolerance-making it optimal for ruggedized, low-power, legacy-compatible instrumentation.

Availability

ZRC400A03 is available at Aetrix Electronics and suitable for battery-powered multimeters, portable data loggers, and industrial panel meters requiring stable component supply with long-term availability and consistent parametric performance.

Supply support for ZRC400A03 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 cost-sensitive, low-power instrumentation and portable test equipment demanding stable shunt references without external compensation.

FAQ

What is the maximum capacitive load the ZRC400A03 can drive without instability?

The ZRC400A03 is specified as stable with any capacitive load-no upper limit is defined in the datasheet. This is achieved through internal compensation, allowing direct connection to ADC reference pins, op-amp inputs, or large bulk capacitors without external series resistance or phase compensation networks.

Can the ZRC400A03 operate below its 23 µA recommended minimum current?

Yes-the ZRC400A03 has a typical knee current of 18 µA and remains functional down to this level, though regulation accuracy degrades slightly. At 15 µA, output voltage may deviate by up to ±15 mV from nominal; operation below 10 µA is not characterized and not recommended for precision applications.

Is Pin 3 of the E-Line 3-pin package electrically connected internally?

No-Pin 3 is internally unconnected (NC) in standard configuration. The datasheet states it may be bonded to Pin 1 at manufacturing for thermal or mechanical reasons, but no electrical function is assigned. Designers should treat it as NC unless explicitly configured otherwise in custom orders.

How does the ZRC400A03 handle transient overcurrent events?

The ZRC400A03 withstands transient currents up to 200 mA due to rugged 20 V processing and internal current-limiting design. It recovers fully within microseconds after such events, with no parameter shift or latch-up observed-verified per absolute maximum ratings and transient response characterization at −40°C, 25°C, and +85°C.

ZRC400A03 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:: ±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:: Through Hole

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

ZRC400A03 FAQ

1.How can I place an order for ZRC400A03 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC400A03 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 ZRC400A03 reliable?

The price and inventory of ZRC400A03 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC400A03 is usually 5 days.

3.What payment methods are accepted for ZRC400A03?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC400A03 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC400A03?

ZRC400A03 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC400A03 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 ZRC400A03?

For technical support, including ZRC400A03 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC400A03 requirements.

6.How does Aetrix verify that ZRC400A03 is sourced from the original manufacturer or authorized distributors?

All ZRC400A03 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 ZRC400A03 meets industry standards.

7.What is the process for return or replacement of ZRC400A03?

All ZRC400A03 units undergo pre-shipment inspection (PSI). If there is an issue with ZRC400A03, 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 ZRC400A03 part is unused and in its original packaging.

Return procedure for ZRC400A03:

1.Submit a request within 90 days.

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

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