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

Diodes Incorporated ZXRE4041FFTA

Name: ZXRE4041FFTA
Brand: Diodes Incorporated
SKU: ZXRE4041FFTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXRE4041FFTA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: ZXRE4041FFTA.pdf

Description:: IC VREF SHUNT 3% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:4,691

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Product details

Overview

ZXRE4041FFTA from Diodes Incorporated is a precision micropower bandgap voltage reference IC 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 - deployed in battery-powered instrumentation and portable A/D converter biasing.

For engineers reviewing the ZXRE4041FFTA datasheet, ZXRE4041FFTA pinout, ZXRE4041FFTA application, or ZXRE4041FFTA 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 ZXRE4041FFTA operates as a two-terminal shunt reference, sinking current from a high-impedance source to ground to maintain a stable 1.225 V across its terminals. It functions over 30 µA to 12 mA load current and maintains regulation across −40°C to +125°C ambient.

Its bandgap core achieves low drift via curvature compensation, yielding 20 ppm/°C typical TC and <100 ppm/°C max TC. The device exhibits unconditionally stable operation up to 10 nF capacitive load without external compensation.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	1.225 V ±0.5% (C grade) - precise bias point for ADC/DAC reference inputs and sensor excitation.
Temp Coefficient	20 ppm/°C typical - ensures ≤0.3 mV drift over 0–70°C industrial range.
Knee Current	30 µA - enables ultra-low-power operation in coin-cell or energy-harvesting systems.
Dynamic Impedance	0.2–0.6 Ω at 1 mA - minimizes output voltage perturbation under transient load steps.
Noise (10 Hz–10 kHz)	60 µV_rms - supports high-resolution (≥16-bit) analog measurement accuracy.
Capacitive Load Stability	Unconditional up to 10 nF - eliminates need for series resistor or external compensation network.

Pinout & Package

Package: SOT23-3 (JEDEC TO-236AB), 2.80 × 2.10 × 1.12 mm body height, gull-wing leads, green molding compound (Br/Sb-free).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode (cathode-connected internally)	Internally tied to cathode; left floating or connected to Pin 2 per application circuit for improved stability.
Pin 2	Cathode	Main reference output node; sinks current to establish regulated 1.225 V across external load/resistor.
Pin 3	Anode	Ground connection; completes shunt path and defines reference return path for bias network.

Key Features

Feature	Design Value
LM4041 pin-compatible footprint	Direct drop-in replacement in existing SOT23-3 layouts without PCB revision.
0.5% initial tolerance (C grade)	Reduces calibration overhead in precision data acquisition and portable test equipment.
30 µA minimum operating current	Enables use with high-value bias resistors (>1 MΩ) in ultra-low-quiescent systems.
20 ppm/°C tempco	Meets Class I accuracy requirements for industrial-grade sensor signal chains.
Unconditional capacitive stability	Supports direct connection to ADC reference input capacitors (e.g., 100 nF ceramic) without oscillation risk.

Applications

Battery-Powered Instrumentation

Precision Data Acquisition

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

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225 V reference for ADC internal gain stage and sensor excitation.

Use Value: 30 µA knee current extends battery life >1 year; 60 µV_rms noise preserves effective resolution ≥15.5 bits.

Use Scenario: Industrial sensor node with RTD bridge and 24-bit delta-sigma ADC.

IC Role / Device Role / Timing Role: Precision reference for ratiometric bridge excitation and ADC reference input.

Use Value: 0.5% tolerance and 20 ppm/°C TC ensure <±0.1% total error over −25°C to +70°C operating range.

Portable Communication Devices

Notebook Power Management

Use Scenario: LTE modem module requiring stable reference for RF front-end DACs and PLL VCXO bias.

IC Role / Device Role / Timing Role: Low-noise voltage reference for DAC biasing and analog control loop setpoints.

Use Value: Unconditional stability into 10 nF decoupling caps prevents reference rail oscillation during RF burst transmission.

Use Scenario: Notebook system power rail monitor with microcontroller-based ADC sampling 12 V, 5 V, and 3.3 V rails.

IC Role / Device Role / Timing Role: Reference source for MCU's internal ADC used in multi-rail voltage supervision.

Use Value: SOT23-3 package saves board space in dense VRM layout; 12 mA max current supports fast ADC sampling bursts.

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; 50 ppm/°C TC; 60 µA min current.	Requires external resistor divider; higher TC and noise limit use in high-accuracy systems.	Select only when adjustable reference is required; not a direct replacement for fixed 1.225 V.
MAX6008AEUR+T	Fixed 1.25 V output; 0.2% tolerance; 15 ppm/°C TC; 35 µA min current; 35 µV_rms noise.	Higher accuracy and lower noise, but requires 35 µA min current and has different pinout (SOT23-5).	Choose for highest precision where board space allows SOT23-5 and tighter TC/noise specs justify cost premium.

Compared with LM4041CIM3X-ADJ, ZXRE4041FFTA offers tighter fixed-voltage accuracy and lower TC; versus MAX6008AEUR+T, it trades 0.025 V offset and slightly higher noise for guaranteed SOT23-3 pin compatibility and lower knee current.

Availability

ZXRE4041FFTA is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition systems, and portable communication devices requiring stable component supply with long-term lifecycle assurance.

Supply support for ZXRE4041FFTA 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 for ultra-low-power, high-stability applications where space-constrained designs demand SOT23-3 compatibility and sub-100 ppm/°C temperature performance.

FAQ

What is the maximum capacitive load the ZXRE4041FFTA can drive without oscillation?

The ZXRE4041FFTA is unconditionally stable with capacitive loads up to 10 nF, as confirmed in the DS32169 datasheet Typical Characteristics section and Application Circuit guidelines. No series resistor or external compensation is required, enabling direct connection to ADC reference pins with standard 100 nF ceramic bypass capacitors.

Does ZXRE4041FFTA require an external resistor to operate?

Yes - as a two-terminal shunt reference, ZXRE4041FFTA requires an external current-setting resistor between the supply rail and the cathode (Pin 2). This resistor establishes the operating current within the 30 µA to 12 mA range. The value is calculated as R = (V_SUPPLY − 1.225 V) / I_OP, where I_OP must exceed 30 µA for regulation.

How does the 0.5% tolerance (C grade) translate to absolute voltage deviation at 25°C?

At 25°C, the ZXRE4041FFTA C-grade guarantees a reference voltage between 1.219 V and 1.231 V, corresponding to ±0.006 V deviation from the nominal 1.225 V. This is derived directly from the Electrical Characteristics table in DS32169 Rev. 6–2, where VR(Min) = 1.219 V and VR(Max) = 1.231 V at IR = 100 µA.

Can ZXRE4041FFTA replace LM4041CIM3X in existing designs without modification?

Yes - ZXRE4041FFTA is explicitly designed as a pin-for-pin compatible alternative to LM4041CIM3X in SOT23-3 packages. Both share identical pinout (Anode–Cathode–Anode), same 1.225 V nominal output, and comparable electrical envelope, allowing direct substitution without PCB or schematic changes.

ZXRE4041FFTA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: TO-236-3, SC-59, SOT-23-3

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:: Surface Mount

Supplier Device Package:: SOT-23-3

ZXRE4041FFTA FAQ

1.How can I place an order for ZXRE4041FFTA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXRE4041FFTA 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 ZXRE4041FFTA reliable?

The price and inventory of ZXRE4041FFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE4041FFTA is usually 5 days.

3.What payment methods are accepted for ZXRE4041FFTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE4041FFTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXRE4041FFTA?

ZXRE4041FFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXRE4041FFTA 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 ZXRE4041FFTA?

For technical support, including ZXRE4041FFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE4041FFTA requirements.

6.How does Aetrix verify that ZXRE4041FFTA is sourced from the original manufacturer or authorized distributors?

All ZXRE4041FFTA 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 ZXRE4041FFTA meets industry standards.

7.What is the process for return or replacement of ZXRE4041FFTA?

All ZXRE4041FFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE4041FFTA, 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 ZXRE4041FFTA part is unused and in its original packaging.

Return procedure for ZXRE4041FFTA:

1.Submit a request within 90 days.

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

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