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

Diodes Incorporated ZR40402F41TC

Name: ZR40402F41TC
Brand: Diodes Incorporated
SKU: ZR40402F41TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40402F41TC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZR40402F41TC.pdf

Description:: IC VREF SHUNT 2% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,185

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Product details

Overview

ZR40402F41TC from Diodes Incorporated is a precision micropower 4.1 V bandgap voltage reference in SOT-23 package, delivering 1% initial tolerance, 20 ppm/°C typical temperature coefficient, 0.55 Ω typical slope resistance, and stable operation from 60 µA to 15 mA - ideal for battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZR40402F41TC datasheet, ZR40402F41TC pinout, ZR40402F41TC application, or ZR40402F41TC equivalent, key selection criteria include low quiescent current, capacitor-free stability, tight TC, load regulation under capacitive loads, and SOT-23 thermal/power dissipation limits at 330 mW.

Technical Context

The ZR40402F41TC implements a bandgap-based shunt voltage reference topology with internal curvature compensation, enabling stable 4.1 V output across −40°C to +85°C without external stabilization components. Its low dynamic impedance (0.55 Ω typ.) and wide operating current range (60 µA–15 mA) support both ultra-low-power sensing and moderate-current precision biasing.

It achieves 1% initial accuracy and maintains <100 ppm/°C max temperature coefficient over full industrial temperature range. The device sustains stable regulation up to 25 mA absolute maximum reverse current and withstands transient surges up to 200 mA due to rugged 20 V process design.

Key Specifications

Parameter	Value and Actual Design Meaning
V_R (Nominal)	4.1 V - precise shunt reference voltage at 150 µA test current
Tolerance	±1% - ensures initial accuracy within ±41 mV at 25°C
Temp Coefficient	20 ppm/°C typ. - drift ≤ ±1.7 mV over −40°C to +85°C
Slope Resistance	0.55 Ω typ. - low output impedance enables stable regulation under varying load current
Operating Current	60 µA to 15 mA - supports micropower sensor bias and higher-current reference buffering
Dynamic Impedance	0.5 Ω min / 1.2 Ω max @ 1 mA, 100 Hz - critical for noise-sensitive ADC reference rails
Wideband Noise	90 µV_rms (10 Hz–10 kHz) - suitable for 16-bit+ data acquisition front-ends

Pinout & Package

SOT-23 package (suffix F), 3-pin surface-mount, JEDEC MO-178 compatible. Pin 1 = Anode (floating or tied to Pin 2 per datasheet), Pin 2 = Cathode (output/reference node), Pin 3 = NC or Anode (package variant dependent); standard pinout assumes cathode output configuration.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode (floating or tied to Pin 2)	Optional connection point for improved thermal stability or layout flexibility; not required for basic operation
Pin 2	Cathode / Reference Output	Primary output node where regulated 4.1 V appears; connects to load and feedback network
Pin 3	No Connect or Anode (reversed E-Line variant)	Not internally connected in standard SOT-23 F-suffix; verify layout against Diodes Inc. package drawing ZR40402F41TC

Key Features

Feature	Design Value
No external capacitor required	Enables space-constrained PCB layouts without stability-compromising bypass components
Stable with capacitive loads	Supports direct connection to ADC reference inputs or op-amp feedback nodes without oscillation risk
2 µs typical turn-on time	Meets fast wake-up requirements in duty-cycled portable instruments and energy-harvesting systems
Rugged 200 mA surge rating	Withstands ESD transients and inrush events in industrial field equipment without derating
Industrial temperature range	Guarantees specification compliance from −40°C to +85°C for outdoor and factory-floor deployments

Applications

Battery-Powered Portable Meters

Precision Data Acquisition Front-Ends

Use Scenario: Handheld multimeters and clamp meters operating on coin-cell or AA batteries with intermittent measurement cycles.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.1 V excitation for analog front-end gain stages and ADC reference rails.

Use Value: 60 µA minimum operating current extends battery life >2 years; 1% tolerance ensures calibrated accuracy without field recalibration.

Use Scenario: 16-bit delta-sigma ADC modules in PLC I/O cards requiring low-noise, stable reference under varying supply conditions.

IC Role / Device Role / Timing Role: Primary reference source for SAR and sigma-delta converters, decoupled from noisy digital power domains.

Use Value: 90 µV_rms noise and 0.55 Ω slope resistance limit reference-induced ENOB degradation to <0.1 LSB.

Crystal Oscillator Bias Networks

Low-Power Sensor Signal Conditioning

Use Scenario: Temperature-compensated crystal oscillator (TCXO) modules where reference voltage sets varactor tuning range and amplifier bias points.

IC Role / Device Role / Timing Role: Precision DC bias generator stabilizing oscillator core gain and frequency pull range.

Use Value: 20 ppm/°C TC minimizes frequency drift contribution; capacitor-free operation avoids phase noise modulation from ceramic capacitor aging.

Use Scenario: MEMS pressure and humidity sensors in wireless IoT nodes with sleep-wake cycling and sub-10 µA average current budgets.

IC Role / Device Role / Timing Role: Micropower excitation source for bridge sensors and bias for instrumentation amplifiers during active measurement windows.

Use Value: Stable 4.1 V output at 100 µA enables ratiometric measurement integrity while consuming <0.5% of total system active power.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431ACDBVR	Adjustable (2.5 V–36 V), 0.5% initial tol, 100 ppm/°C max TC, requires external resistors	Used where programmable reference or higher voltage (>4.1 V) needed; adds BOM and layout complexity	Select when design requires flexibility in reference voltage setting or integration with feedback control loops
REF43 4.096V	Fixed 4.096 V, 0.05% max tol, 3 ppm/°C max TC, 100 µA min current, SOIC-8	Targeted at high-precision lab equipment; larger package and higher cost than SOT-23	Select when metrology-grade accuracy and ultra-low TC outweigh size and cost constraints

Compared with TLVH431ACDBVR and REF43, the ZR40402F41TC offers optimal balance of SOT-23 footprint, 1% accuracy, micropower operation, and capacitor-free stability - making it preferred for space- and battery-limited industrial and portable designs where ±0.5% is sufficient.

Availability

ZR40402F41TC is available at Aetrix Electronics and suitable for battery-powered portable meters, precision data acquisition systems, and low-power sensor signal conditioning requiring stable component supply and long-term production continuity.

Supply support for ZR40402F41TC 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for industrial, computing, communications, and consumer markets.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered specifically for micropower, capacitor-free operation in space-constrained and battery-dependent applications across industrial and portable electronics.

FAQ

Is ZR40402F41TC stable without an external capacitor?

Yes. The ZR40402F41TC is designed with internal compensation and remains stable without any external capacitor, even when driving capacitive loads up to several nanofarads - a key advantage for compact PCB layouts and fast-turn-on applications.

What is the maximum safe reverse current for continuous operation?

The recommended continuous operating current is 15 mA. While the absolute maximum rating is 25 mA, sustained operation above 15 mA may exceed thermal limits in SOT-23 at ambient temperatures >60°C; derating is advised per the 330 mW power dissipation limit.

Can ZR40402F41TC be used in place of a 4.096 V reference?

Yes, with attention to system tolerance budget. At 4.100 V nominal (vs. 4.096 V), the 4 mV difference introduces ~0.1% full-scale error in ratiometric 12-bit systems; acceptable in most 10–12 bit applications but requires verification in metrology-grade 16-bit+ designs.

Does pin configuration vary between ZR40402F41TC and ZR40402R41?

Yes. The SOT-23 (F-suffix) uses Pin 2 as cathode output; the E-Line (R-suffix) TO-92 variant assigns Pin 3 as cathode. Layouts must match package-specific pinouts - mixing footprints risks reverse-bias failure or open-circuit behavior.

ZR40402F41TC 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):: 4.096V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±2%

Temperature Coefficient:: 100ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 90µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 60 µA

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

ZR40402F41TC FAQ

1.How can I place an order for ZR40402F41TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40402F41TC 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 ZR40402F41TC reliable?

The price and inventory of ZR40402F41TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40402F41TC is usually 5 days.

3.What payment methods are accepted for ZR40402F41TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40402F41TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40402F41TC?

ZR40402F41TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40402F41TC 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 ZR40402F41TC?

For technical support, including ZR40402F41TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40402F41TC requirements.

6.How does Aetrix verify that ZR40402F41TC is sourced from the original manufacturer or authorized distributors?

All ZR40402F41TC 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 ZR40402F41TC meets industry standards.

7.What is the process for return or replacement of ZR40402F41TC?

All ZR40402F41TC units undergo pre-shipment inspection (PSI). If there is an issue with ZR40402F41TC, 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 ZR40402F41TC part is unused and in its original packaging.

Return procedure for ZR40402F41TC:

1.Submit a request within 90 days.

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

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