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

Diodes Incorporated ZXRE4041EFTC

Name: ZXRE4041EFTC
Brand: Diodes Incorporated
SKU: ZXRE4041EFTC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXRE4041EFTC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZXRE4041EFTC.pdf

Description:: IC VREF SHUNT 2% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:4,464

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Product details

Overview

ZXRE4041EFTC from Diodes Incorporated is a micropower bandgap voltage reference IC delivering a precise 1.225 V output with ±0.5% initial tolerance (C grade), 20 ppm/°C typical temperature coefficient, and stable operation from 30 µA to 12 mA supply current - used in precision A/D converters and portable instrumentation.

For engineers reviewing the ZXRE4041EFTC datasheet, ZXRE4041EFTC pinout, ZXRE4041EFTC application, or ZXRE4041EFTC equivalent, key selection criteria include low knee current (30 µA), unconditional capacitive-load stability, SOT23-3 package compatibility, and direct functional replacement for LM4041C variants in space-constrained, battery-powered systems.

Technical Context

The ZXRE4041EFTC implements a two-terminal shunt-mode bandgap reference architecture, operating as a precision current-sink device requiring an external series resistor to set operating current. It achieves regulation by maintaining a fixed reverse breakdown voltage across its cathode-anode terminals.

Its design eliminates need for external compensation: it remains unconditionally stable with capacitive loads up to 10 µF, and exhibits only 1 mV reverse breakdown shift over 30 µA–12 mA current range - enabling robust use in noisy or dynamically loaded analog front-ends.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	1.225 V ±0.5% (C grade) - defines absolute accuracy of ADC/DAC biasing and sensor excitation circuits
Tempco	20 ppm/°C typical - ensures ≤0.25 mV drift over –40°C to +125°C ambient for high-resolution measurement systems
Knee Current	30 µA - minimum current required to enter regulation; enables ultra-low-power sleep-mode reference retention
Operating Current Range	30 µA to 12 mA - supports wide dynamic range from energy-harvesting sensors to active signal conditioning stages
Dynamic Impedance	0.2 Ω typical at 1 mA - minimizes output voltage perturbation under fast load transients in precision DAC buffers
Wideband Noise	60 µV(rms), 10 Hz–10 kHz - limits added noise floor in 16-bit+ data acquisition front-ends

Pinout & Package

Package: SOT23-3 (JEDEC TO-236AB), 2.80 × 2.10 × 1.12 mm body, gull-wing leads, RoHS-compliant green molding compound.

Pin/Terminal	Circuit Role	Design Meaning
1 (Anode)	Current sink return path	Connected to system ground; completes shunt current loop - floating or tied to Pin 2 per application circuit
2 (Cathode)	Reference output node	Provides regulated 1.225 V; connects to load or feedback network - primary voltage sensing point
3 (NC)	No connect	Internally unused; must remain unconnected - no routing or thermal tie permitted

Key Features

Feature	Design Value
Unconditional capacitive-load stability	Operates stably with ≥10 µF output capacitance - eliminates need for external compensation in battery-monitoring filters
SOT23-3 pinout compatibility with LM4041	Direct PCB footprint replacement for LM4041C/D - enables drop-in upgrade without layout change
Green molding compound (Br/Sb-free)	Meets IPC-1752A Class 2 material declaration - supports RoHS 2 and REACH compliance in medical and industrial BOMs
Low 30 µA knee current	Enables reference activation in wake-on-event microcontroller subsystems - extends shelf life of coin-cell-powered IoT nodes

Applications

Battery Voltage Monitoring

Precision ADC Reference

Use Scenario: Real-time monitoring of Li-ion cell voltage in wearable health trackers during charge/discharge cycles.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225 V基准 for 12-bit SAR ADC input scaling.

Use Value: Enables ±5 mV absolute voltage measurement accuracy across –10°C to +60°C operating range with no calibration.

Use Scenario: High-resolution analog input stage in portable multimeters with auto-ranging capability.

IC Role / Device Role / Timing Role: Primary reference source for dual-slope integrating ADC core, rejecting supply ripple via shunt topology.

Use Value: Delivers <1 LSB error contribution over 100:1 input range due to 20 ppm/°C tempco and 60 µV noise floor.

Portable Gas Sensor Biasing

Industrial Loop-Powered Transmitter

Use Scenario: Electrochemical gas sensor excitation in handheld air quality analyzers powered by single AA battery.

IC Role / Device Role / Timing Role: Low-current reference generating precise bias voltage for sensor heater control circuitry.

Use Value: Maintains sensor sensitivity within ±2% over full battery discharge (1.8 V → 0.9 V) using 30 µA knee current and wide operating current range.

Use Scenario: 4–20 mA current-loop transmitter in factory-floor pressure sensors with HART communication.

IC Role / Device Role / Timing Role: Stable reference for voltage-to-current conversion op-amp stage operating from 12–36 V loop supply.

Use Value: Ensures <0.1% full-scale error across –40°C to +85°C ambient, meeting IEC 61298-2 Class 0.1 requirements.

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 V min); 1.5% initial tolerance; 100 ppm/°C max tempco	Requires external resistor divider; higher drift limits use in >12-bit systems	Select when adjustable reference or TI-ecosystem compatibility is prioritized over precision
MAX6008AEUR+T	Fixed 1.25 V output; 0.2% initial tolerance; 30 ppm/°C max tempco; 1.8 µA quiescent current	Lower power but tighter tolerance - suited for ultra-low-power sensor nodes where 1.25 V matches ADC VREF requirement	Choose for sub-µA standby current in energy-harvesting designs where 1.25 V is acceptable

Compared with LM4041CIM3X and MAX6008AEUR+, the ZXRE4041EFTC offers superior tempco (20 vs. 100/30 ppm/°C) and tighter tolerance (0.5% vs. 1.5%/0.2%) at moderate quiescent current - optimizing accuracy-per-microwatt in portable instrumentation.

Availability

ZXRE4041EFTC is available at Aetrix Electronics and suitable for battery-powered equipment, precision power supplies, and portable instrumentation requiring stable component supply with guaranteed long-term sourcing.

Supply support for ZXRE4041EFTC 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, cost-optimized components for industrial, computing, and consumer markets.

The ZXRE4041 belongs to Diodes' precision reference product line, engineered specifically for space-constrained, low-power analog signal chains in portable and battery-operated systems.

FAQ

What is the correct biasing configuration for ZXRE4041EFTC in a shunt reference circuit?

The ZXRE4041EFTC requires a series resistor between the supply rail and its cathode (Pin 2). Anode (Pin 1) connects to ground. The resistor value is calculated as R = (V_SUPPLY − 1.225 V) / I_OP, where I_OP is selected between 30 µA and 12 mA. Pin 3 is not connected.

Can ZXRE4041EFTC drive a 100 nF bypass capacitor directly at its cathode?

Yes - the device is unconditionally stable with capacitive loads up to 10 µF. A 100 nF ceramic capacitor may be placed directly at the cathode (Pin 2) to suppress high-frequency noise without risk of oscillation or regulation loss, per DS32169 Rev. 6–2 Figure 5.

How does the 0.5% tolerance (C grade) translate to absolute voltage error at 85°C?

At 85°C, total error = initial tolerance (±0.5% of 1.225 V = ±6.13 mV) plus tempco-induced drift (20 ppm/°C × 60°C × 1.225 V ≈ ±1.47 mV), yielding worst-case deviation of ±7.6 mV - verified in Electrical Characteristics Table, row VR, column Max.

Is ZXRE4041EFTC compatible with lead-free reflow profiles?

Yes - the SOT23-3 package uses matte-tin lead finish and green molding compound rated for JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260°C for 30 seconds, as confirmed in Diodes' packaging specification PKG-001-002.

ZXRE4041EFTC 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:: ±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:: Surface Mount

Supplier Device Package:: SOT-23-3

ZXRE4041EFTC FAQ

1.How can I place an order for ZXRE4041EFTC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXRE4041EFTC 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 ZXRE4041EFTC reliable?

The price and inventory of ZXRE4041EFTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE4041EFTC is usually 5 days.

3.What payment methods are accepted for ZXRE4041EFTC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE4041EFTC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXRE4041EFTC?

ZXRE4041EFTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXRE4041EFTC 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 ZXRE4041EFTC?

For technical support, including ZXRE4041EFTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE4041EFTC requirements.

6.How does Aetrix verify that ZXRE4041EFTC is sourced from the original manufacturer or authorized distributors?

All ZXRE4041EFTC 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 ZXRE4041EFTC meets industry standards.

7.What is the process for return or replacement of ZXRE4041EFTC?

All ZXRE4041EFTC units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE4041EFTC, 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 ZXRE4041EFTC part is unused and in its original packaging.

Return procedure for ZXRE4041EFTC:

1.Submit a request within 90 days.

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

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