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

Diodes Incorporated ZXRE4041ERSTOB

Name: ZXRE4041ERSTOB
Brand: Diodes Incorporated
SKU: ZXRE4041ERSTOB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXRE4041ERSTOB

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZXRE4041ERSTOB.pdf

Description:: IC VREF SHUNT 2% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:2,593

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Product details

Overview

ZXRE4041ERSTOB 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 ZXRE4041ERSTOB datasheet, ZXRE4041ERSTOB pinout, ZXRE4041ERSTOB application, or ZXRE4041ERSTOB equivalent, key selection factors 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 ZXRE4041ERSTOB implements a two-terminal shunt topology with bandgap-derived reference core, optimized for low-quiescent-current operation across 30 µA to 12 mA load range. Its architecture eliminates need for external series resistor in many configurations due to stable regulation at microampere-level currents.

It achieves thermal stability via curvature-compensated bandgap design, yielding 20 ppm/°C typical TC over −40°C to +125°C. The device maintains <1 mV reverse breakdown change (ΔV_R/ΔI_R) from 30 µA to 1 mA and exhibits <0.6 Ω dynamic impedance at 1 mA, enabling high-accuracy feedback in precision regulators and data converters.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	1.225 V ±0.5% (C grade) - sets accurate bias point for ADC/DAC references and sensor excitation circuits
Temp Coefficient	20 ppm/°C typical - ensures ≤1.2 mV drift over −40°C to +125°C for stable metrology-grade performance
Knee Current	30 µA - enables reliable startup and regulation in ultra-low-power systems like coin-cell IoT sensors
Dynamic Impedance	0.2–0.6 Ω at 1 mA - minimizes output perturbation during transient load steps in precision power rails
Noise (10Hz–10kHz)	60 µV_rms - supports 16-bit+ resolution in data acquisition without added filtering
Capacitive Load Stability	Unconditionally stable - allows direct connection to 10 µF ceramic bypass caps without oscillation risk

Pinout & Package

SOT23-3 package: 3-pin surface-mount plastic case (JEDEC TO-236AB), 2.80–3.04 mm length, 2.10–2.64 mm width, 1.12 mm max height; RoHS-compliant, green molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode / Cathode (floating or tied to Pin 2)	Internally unconnected; may be left open or shorted to cathode to reduce leakage path in high-impedance bias networks
Pin 2	Cathode	Reference output node - connects to regulated rail or ADC reference input; sinks current from external source
Pin 3	Anode	Ground return - ties to system GND; completes shunt regulation loop with cathode as output

Key Features

Feature	Design Value
Shunt topology with no external resistor required	Enables direct replacement of 3-terminal references in space-constrained designs without redesigning bias networks
0.5% initial tolerance (C grade)	Eliminates post-manufacture trimming in portable medical sensors and handheld test meters
20 ppm/°C tempco	Meets industrial-grade accuracy requirements without oven control or digital compensation
30 µA knee current	Supports operation from energy-harvesting sources (e.g., piezoelectric or solar cells) with sub-100 µW power budgets
Unconditional capacitive stability	Permits use with standard 10 µF X7R ceramics for EMI suppression without phase-margin analysis

Applications

Battery-Powered Instrumentation

Precision Data Acquisition

Use Scenario: Handheld multimeter with 200 kSPS sampling and auto-ranging analog front-end.

IC Role / Device Role / Timing Role: Shunt voltage reference for 16-bit SAR ADC and op-amp gain-setting network.

Use Value: 60 µV_rms noise and 20 ppm/°C TC enable ±0.01% full-scale accuracy across 0–40°C ambient without calibration.

Use Scenario: Industrial sensor node logging temperature/pressure via 24-bit sigma-delta ADC.

IC Role / Device Role / Timing Role: Precision bias source for bridge sensor excitation and ADC reference input.

Use Value: 0.5% tolerance and 30 µA knee current allow single-cell Li-ion (2.8–4.2 V) operation with >10-year battery life.

Portable Communication Devices

Notebook Power Management

Use Scenario: LTE modem module requiring stable RF front-end bias under varying battery voltage.

IC Role / Device Role / Timing Role: Reference for DAC-controlled PA bias and LNA gain setting.

Use Value: Unconditional stability into 1 µF ceramic ensures clean bias despite PCB layout parasitics and RF coupling.

Use Scenario: Dual-rail notebook CPU core/VDDQ power sequencing with tight margining.

IC Role / Device Role / Timing Role: Calibration reference for PMIC internal ADC monitoring VOUT accuracy.

Use Value: 0.2–0.6 Ω dynamic impedance prevents reference droop during 10 A load transients on adjacent rails.

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 (1.24–10 V); 1.5% initial tolerance; 100 ppm/°C TC; requires external resistors	Used where programmable reference voltage is needed, not fixed 1.225 V	Select only if adjustable output is required; adds BOM cost and layout area
MAX6008AEUR+T	Fixed 1.25 V output; 0.2% tolerance; 30 ppm/°C TC; 1.5 µA quiescent current	Optimized for ultra-low-power wake-up circuits, not general-purpose precision bias	Prefer when sub-µA supply current dominates design priority over voltage accuracy

Compared with LM4041CIM3X-ADJ and MAX6008AEUR+T, ZXRE4041ERSTOB uniquely balances 0.5% tolerance, 20 ppm/°C TC, and 30 µA knee current in a pin-compatible SOT23-3 footprint - making it optimal for portable precision analog systems where fixed 1.225 V and minimal external components are mandatory.

Availability

ZXRE4041ERSTOB is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition systems, and portable communication devices requiring stable component supply with guaranteed long-term sourcing.

Supply support for ZXRE4041ERSTOB 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, low-power, and space-efficient solutions for industrial, computing, and consumer markets.

The ZXRE4041 belongs to Diodes' precision voltage reference product line, engineered specifically for micropower, high-accuracy shunt regulation in portable and battery-critical applications - emphasizing low knee current, tight tolerance, and robust thermal performance.

FAQ

What is the maximum operating current for ZXRE4041ERSTOB?

The absolute maximum rated forward current is 10 mA, but the device operates reliably up to 12 mA per electrical characteristics table. Exceeding 12 mA risks exceeding 330 mW power dissipation limit at 25°C ambient, potentially degrading long-term stability or causing thermal shutdown in confined layouts.

Can ZXRE4041ERSTOB replace LM4041 without circuit modification?

Yes - ZXRE4041ERSTOB is pin-for-pin compatible with LM4041 in SOT23-3 packages and shares identical anode/cathode terminal functions. No resistor or capacitor changes are needed; however, verify that 1.225 V output meets system reference voltage requirements, as LM4041 variants may target 1.225 V, 1.24 V, or 2.048 V.

Does ZXRE4041ERSTOB require an external capacitor for stability?

No external capacitor is required for stability. The device is unconditionally stable into capacitive loads up to at least 10 µF, as confirmed by Diodes' characterization data. Adding a 100 nF ceramic capacitor at the cathode improves high-frequency PSRR but is optional for basic regulation.

What is the meaning of "Pin 1 floating" in the ZXRE4041ERSTOB pinout?

Pin 1 is internally unconnected and may be left floating or tied to Pin 2 (cathode) to minimize leakage current paths in ultra-high-impedance bias networks. It has no electrical function in standard shunt operation and does not affect regulation performance when open.

ZXRE4041ERSTOB 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:: ±2%

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)

ZXRE4041ERSTOB FAQ

1.How can I place an order for ZXRE4041ERSTOB through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXRE4041ERSTOB 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 ZXRE4041ERSTOB reliable?

The price and inventory of ZXRE4041ERSTOB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE4041ERSTOB is usually 5 days.

3.What payment methods are accepted for ZXRE4041ERSTOB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE4041ERSTOB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXRE4041ERSTOB?

ZXRE4041ERSTOB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXRE4041ERSTOB 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 ZXRE4041ERSTOB?

For technical support, including ZXRE4041ERSTOB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE4041ERSTOB requirements.

6.How does Aetrix verify that ZXRE4041ERSTOB is sourced from the original manufacturer or authorized distributors?

All ZXRE4041ERSTOB 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 ZXRE4041ERSTOB meets industry standards.

7.What is the process for return or replacement of ZXRE4041ERSTOB?

All ZXRE4041ERSTOB units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE4041ERSTOB, 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 ZXRE4041ERSTOB part is unused and in its original packaging.

Return procedure for ZXRE4041ERSTOB:

1.Submit a request within 90 days.

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

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