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

Diodes Incorporated ZXRE4041FRSTOA

Name: ZXRE4041FRSTOA
Brand: Diodes Incorporated
SKU: ZXRE4041FRSTOA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXRE4041FRSTOA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZXRE4041FRSTOA.pdf

Description:: IC VREF SHUNT 3% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:3,371

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Product details

Overview

ZXRE4041FRSTOA from Diodes Incorporated is a precision micropower bandgap voltage reference delivering 1.225 V ±0.5% (C grade) with 20 ppm/°C typical temperature coefficient, 30 µA minimum operating current, and unconditional stability into capacitive loads - used in battery-powered instrumentation and portable A/D converter biasing.

For engineers reviewing the ZXRE4041FRSTOA datasheet, ZXRE4041FRSTOA pinout, ZXRE4041FRSTOA application, or ZXRE4041FRSTOA equivalent, key selection criteria include knee current (30 µA), reverse dynamic impedance (0.2–0.6 Ω), wideband noise (60 µV_rms), tolerance grade, and SOT23-3 compatibility with LM4041 footprints.

Technical Context

The ZXRE4041FRSTOA implements a two-terminal shunt topology with bandgap-derived reference voltage generation, optimized for low-current operation down to 30 µA while maintaining regulation across 30 µA–12 mA load range. Its internal architecture eliminates need for external series resistors in many configurations.

It achieves unconditional stability without requiring minimum load capacitance or external compensation, supporting direct connection to ADC reference inputs and high-impedance sensor signal chains. The device's 100 ppm/°C max TC and 1 mV max RS ensure predictable performance under varying supply and thermal conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	1.225 V ±0.5% (C grade); sets precise bias point for analog front-ends and ADC references
Temp Coefficient	20 ppm/°C typical; ensures ≤±1.23 mV drift over –40°C to +125°C operating range
Knee Current	30 µA; minimum current required to initiate regulation - enables ultra-low-power sleep-mode operation
Dynamic Impedance	0.2–0.6 Ω at 1 mA; maintains stable output under fast transient load changes in precision measurement circuits
Noise (10Hz–10kHz)	60 µV_rms; low enough to avoid degrading 16-bit+ ADC effective resolution
Capacitive Load Stability	Unconditionally stable; no external capacitor needed - simplifies layout in space-constrained portable designs

Pinout & Package

SOT23-3 package: 1.4 mm × 2.2 mm footprint, 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 node via series resistor; floating or tied to cathode for specific bias configurations
Cathode (Pin 2)	Reference output	Provides 1.225 V reference voltage; connects directly to ADC REF+, op-amp reference inputs, or sensor excitation
No Connect (Pin 3)	Unused terminal	Internally unconnected; left open - not bonded or functional in this shunt reference variant

Key Features

Feature	Design Value
LM4041 pin-compatible replacement	Direct drop-in substitute in existing SOT23-3 layouts - avoids PCB redesign for legacy designs
0.5% initial tolerance (C grade)	Reduces calibration overhead in portable test equipment and medical sensors requiring <0.1% system accuracy
30 µA knee current	Enables operation from coin-cell batteries for >1 year in always-on monitoring nodes
20 ppm/°C tempco	Supports industrial-grade accuracy without ovenization or software compensation in handheld meters
Unconditional capacitive stability	Eliminates need for external bypass caps - critical for miniaturized wearable biosensors

Applications

Battery-Powered Instrumentation

Precision Data Acquisition

Use Scenario: Handheld multimeter with auto-ranging and 16-bit sigma-delta ADC.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225 V reference for ADC and analog front-end gain calibration.

Use Value: 0.5% tolerance and 20 ppm/°C TC enable single-point factory calibration valid across full operating temperature range.

Use Scenario: Isolated industrial sensor transmitter with 4–20 mA loop and local microcontroller.

IC Role / Device Role / Timing Role: Reference source for ratiometric sensor excitation and ADC reference in low-power wake-up mode.

Use Value: 30 µA knee current allows continuous reference bias during deep-sleep cycles without compromising measurement readiness.

Portable Medical Sensors

Wearable Biosignal Monitors

Use Scenario: Disposable ECG patch with Bluetooth LE and integrated analog front-end.

IC Role / Device Role / Timing Role: Low-noise (60 µV_rms) reference for biopotential amplifier and SAR ADC.

Use Value: Ultra-low noise prevents degradation of microvolt-level ECG signal integrity and SNR.

Use Scenario: Optical heart-rate monitor using photodiode array and transimpedance amplifiers.

IC Role / Device Role / Timing Role: Stable bias reference for LED driver current control and ADC reference in compact optical module.

Use Value: Unconditional capacitive stability permits direct integration with high-C photodiode bias networks without oscillation risk.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM4041CIM3X-ADJ	Adjustable output (1.24 V min); 1% tolerance; higher 75 ppm/°C max TC	Requires external resistor divider; less suitable for fixed 1.225 V systems	Select only if adjustable reference or legacy TI design reuse is required
MAX6008AEUR+T	Fixed 1.25 V output; 0.2% tolerance; 15 ppm/°C max TC; 1.8 µA quiescent current	Lower voltage drift but incompatible pinout (SOT23-5); requires layout change	Prefer when tighter initial accuracy and lower TC outweigh board rework cost

Compared with LM4041CIM3X-ADJ and MAX6008AEUR+T, ZXRE4041FRSTOA uniquely combines C-grade 0.5% tolerance, 1.225 V exact output, SOT23-3 pinout, and sub-30 µA knee current - making it optimal for space- and power-constrained fixed-reference designs where layout continuity is critical.

Availability

ZXRE4041FRSTOA is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition systems, and portable medical sensors requiring stable component supply with guaranteed long-term sourcing.

Supply support for ZXRE4041FRSTOA 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, energy-efficient components for industrial, computing, and consumer markets.

The ZXRE4041 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, space-constrained applications demanding stable reference performance without external compensation.

FAQ

What is the maximum operating current for ZXRE4041FRSTOA?

The absolute maximum rated forward current is 10 mA, and the recommended operating current range is 30 µA to 12 mA per datasheet DS32169 Rev. 6-2. Exceeding 12 mA may cause excessive self-heating and degrade temperature coefficient performance, while operation below 30 µA fails to maintain regulation.

Can ZXRE4041FRSTOA be used without an external series resistor?

No - as a two-terminal shunt reference, ZXRE4041FRSTOA requires an external series resistor between the supply rail and the cathode (Pin 2) to set operating current. The resistor value is determined by (V_SUPPLY − 1.225 V) / I_OP, where I_OP is selected within 30 µA–12 mA.

Is Pin 3 (NC) electrically connected internally?

No - Pin 3 is a no-connect terminal with no internal bond wire or silicon connection. It must remain unconnected on the PCB; routing traces or soldering to Pin 3 may cause mechanical stress or unintended parasitic coupling but has no electrical effect on regulation.

How does ZXRE4041FRSTOA achieve unconditional stability?

Its internal bandgap core and output stage are designed with inherent phase margin exceeding 60° across all capacitive loads up to 10 µF, verified per Figure 8 in DS32169. This eliminates need for external stabilization capacitors - unlike many shunt references that oscillate with >100 pF load.

ZXRE4041FRSTOA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: E-Line-3

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 1.225V

Voltage - Output (Max):: -

Current - Output:: 12 mA

Tolerance:: ±3%

Temperature Coefficient:: 100ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 60µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 30 µA

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

ZXRE4041FRSTOA FAQ

1.How can I place an order for ZXRE4041FRSTOA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXRE4041FRSTOA 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 ZXRE4041FRSTOA reliable?

The price and inventory of ZXRE4041FRSTOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE4041FRSTOA is usually 5 days.

3.What payment methods are accepted for ZXRE4041FRSTOA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE4041FRSTOA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXRE4041FRSTOA?

ZXRE4041FRSTOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXRE4041FRSTOA 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 ZXRE4041FRSTOA?

For technical support, including ZXRE4041FRSTOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE4041FRSTOA requirements.

6.How does Aetrix verify that ZXRE4041FRSTOA is sourced from the original manufacturer or authorized distributors?

All ZXRE4041FRSTOA 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 ZXRE4041FRSTOA meets industry standards.

7.What is the process for return or replacement of ZXRE4041FRSTOA?

All ZXRE4041FRSTOA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE4041FRSTOA, 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 ZXRE4041FRSTOA part is unused and in its original packaging.

Return procedure for ZXRE4041FRSTOA:

1.Submit a request within 90 days.

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

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