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

Diodes Incorporated ZXRE4041FRSTOB

Name: ZXRE4041FRSTOB
Brand: Diodes Incorporated
SKU: ZXRE4041FRSTOB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXRE4041FRSTOB

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZXRE4041FRSTOB.pdf

Description:: IC VREF SHUNT 3% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:3,587

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Product details

Overview

ZXRE4041FRSTOB 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 portable instrumentation, battery-powered A/D converters, and low-power precision power supplies.

For engineers reviewing the ZXRE4041FRSTOB datasheet, ZXRE4041FRSTOB pinout, ZXRE4041FRSTOB application, or ZXRE4041FRSTOB equivalent, key selection criteria include knee current (30 µA), reverse dynamic impedance (0.2–0.6 Ω), wideband noise (60 µV_rms, 10 Hz–10 kHz), tolerance grade, and SOT23-3 compatibility with LM4041 footprints.

Technical Context

The ZXRE4041FRSTOB implements a two-terminal shunt topology with bandgap-derived reference core, optimized for operation across 30 µA to 12 mA anode current. Its internal design eliminates need for external series resistor trimming in many applications due to tight initial tolerance and low TC.

It achieves unconditional stability without requiring minimum load capacitance, unlike many shunt references - enabling direct use with high-impedance ADC reference inputs and low-noise LDO feedback networks. The device maintains specified TC and drift performance over −40°C to +125°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	1.225 V ±0.5% at 100 µA - enables accurate 12-bit+ ADC biasing without calibration
Temp Coefficient	20 ppm/°C typical - ensures ≤1.2 mV drift over 0–70°C ambient range
Knee Current	30 µA - lowest stable operating current, critical for ultra-low-power coin-cell designs
Dynamic Impedance	0.2–0.6 Ω at 1 mA - minimizes reference voltage perturbation during fast digital switching
Noise (10 Hz–10 kHz)	60 µV_rms - supports high-resolution SAR and delta-sigma converter reference accuracy
Capacitive Load Stability	Unconditionally stable - allows direct connection to >1 µF bypass caps without oscillation risk

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
Anode (Pin 1)	Current sink input	Connected to regulated supply rail; sets operating current via external resistor
Cathode (Pin 2)	Reference output	Provides stable 1.225 V; must be decoupled locally for noise-sensitive circuits
NC / Float (Pin 3)	No-connect terminal	Internally unconnected; may be left floating or tied to cathode per layout best practice

Key Features

Feature	Design Value
LM4041 pin-compatible footprint	Enables drop-in replacement in existing SOT23-3 reference layouts without PCB revision
0.5% initial tolerance (C grade)	Reduces or eliminates system-level calibration for portable medical sensors and handheld meters
30 µA minimum operating current	Supports >10-year battery life in lithium-thionyl-chloride powered remote telemetry nodes
Unconditional capacitive stability	Eliminates need for series isolation resistor when driving switched-capacitor filters or SAR ADC sample-hold inputs
20 ppm/°C tempco	Meets industrial-grade accuracy requirements without external compensation circuitry

Applications

Battery-Powered Instrumentation

Precision Data Acquisition

Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and coin-cell power source.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225 V reference for ADC conversion and internal DAC calibration.

Use Value: 30 µA knee current extends battery life beyond 5 years; 60 µV_rms noise ensures <0.01% measurement uncertainty.

Use Scenario: Isolated industrial sensor node measuring thermocouple and RTD signals.

IC Role / Device Role / Timing Role: Primary reference for dual-channel 24-bit ADC and on-board precision DAC used in sensor linearization.

Use Value: 20 ppm/°C TC and 0.5% tolerance maintain end-to-end accuracy across −40°C to +85°C operating range.

Portable Communication Devices

Notebook Power Management

Use Scenario: Bluetooth LE audio headset with integrated analog microphone bias and ADC.

IC Role / Device Role / Timing Role: Reference for microphone preamp gain-setting and ADC full-scale calibration.

Use Value: Unconditional stability allows direct coupling to 100 nF ceramic bypass cap, reducing BOM count and board area.

Use Scenario: Ultrabook motherboard VRM monitoring and battery fuel gauge reference.

IC Role / Device Role / Timing Role: Stable reference for coulomb counter IC and system voltage supervisor comparator thresholds.

Use Value: SOT23-3 footprint matches space-constrained routing; 125°C max operating temp supports proximity to CPU VRMs.

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/NOPB	Adjustable output (1.24–10 V); 1% tolerance; higher 75 ppm/°C TC	Requires external resistor divider; less suitable for fixed-precision systems	Select only if adjustable reference voltage is required; not recommended for 1.225 V fixed use cases
MAX6008AEUR+T	Fixed 1.25 V output; 0.2% tolerance; 30 ppm/°C TC; 1.5 µA quiescent current	Lower power but tighter tolerance; requires different bias network due to series topology	Prefer for ultra-low-power (<10 µA) applications where 1.25 V is acceptable and PCB redesign is feasible

Compared with LM4041CIM3X-ADJ/NOPB and MAX6008AEUR+T, the ZXRE4041FRSTOB uniquely combines 1.225 V fixed output, 0.5% tolerance, 20 ppm/°C TC, and true SOT23-3 pin compatibility - making it optimal for space- and accuracy-constrained portable instrumentation upgrades.

Availability

ZXRE4041FRSTOB 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 availability.

Supply support for ZXRE4041FRSTOB 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 reference product line, engineered specifically for ultra-low-power, high-accuracy voltage referencing in space-constrained portable and battery-operated systems.

FAQ

What is the maximum operating temperature for ZXRE4041FRSTOB?

The ZXRE4041FRSTOB is rated for continuous operation from −40°C to +125°C ambient temperature. This extended range is validated per Absolute Maximum Ratings in DS32169 Rev. 6−2, supporting deployment in automotive under-hood modules and industrial edge controllers without derating.

Can ZXRE4041FRSTOB drive a 1 µF ceramic capacitor directly?

Yes - the device is unconditionally stable into any capacitive load, including 1 µF X7R ceramics. No series isolation resistor is needed, as confirmed by stability testing across 10 pF to 10 µF in the datasheet's Typical Characteristics section.

Is ZXRE4041FRSTOB RoHS-compliant and halogen-free?

Yes - it uses green molding compound with no bromine or antimony, meeting RoHS Directive 2011/65/EU and JEDEC JS709C halogen-free requirements. The "FRSTOB" suffix explicitly denotes this environmental compliance per Diodes' ordering information table.

How does the 30 µA knee current affect circuit design?

The 30 µA knee current defines the lowest anode current at which the device maintains regulation within spec. Designers must ensure the external bias resistor delivers ≥30 µA across the full input voltage and temperature range - e.g., using 39 kΩ for 1.5 V supply or 120 kΩ for 4.2 V Li-ion battery.

ZXRE4041FRSTOB 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)

ZXRE4041FRSTOB FAQ

1.How can I place an order for ZXRE4041FRSTOB through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXRE4041FRSTOB 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 ZXRE4041FRSTOB reliable?

The price and inventory of ZXRE4041FRSTOB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE4041FRSTOB is usually 5 days.

3.What payment methods are accepted for ZXRE4041FRSTOB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE4041FRSTOB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXRE4041FRSTOB?

ZXRE4041FRSTOB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXRE4041FRSTOB 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 ZXRE4041FRSTOB?

For technical support, including ZXRE4041FRSTOB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE4041FRSTOB requirements.

6.How does Aetrix verify that ZXRE4041FRSTOB is sourced from the original manufacturer or authorized distributors?

All ZXRE4041FRSTOB 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 ZXRE4041FRSTOB meets industry standards.

7.What is the process for return or replacement of ZXRE4041FRSTOB?

All ZXRE4041FRSTOB units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE4041FRSTOB, 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 ZXRE4041FRSTOB part is unused and in its original packaging.

Return procedure for ZXRE4041FRSTOB:

1.Submit a request within 90 days.

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

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