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

Diodes Incorporated ZR40402R41STZ

Name: ZR40402R41STZ
Brand: Diodes Incorporated
SKU: ZR40402R41STZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40402R41STZ

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZR40402R41STZ.pdf

Description:: IC VREF SHUNT 2% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:3,856

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Product details

Overview

ZR40402R41STZ from Diodes Incorporated is a precision micropower 4.1 V bandgap voltage reference in E-Line (TO-92 compatible) package, rated for 1% initial tolerance, 20 ppm/°C typical temperature coefficient, and stable operation from 60 µA to 15 mA. It requires no external capacitor, supports capacitive loads, and delivers fast turn-on (<5 µs), making it ideal for battery-powered instrumentation and portable measurement systems.

For engineers reviewing the ZR40402R41STZ datasheet, ZR40402R41STZ pinout, ZR40402R41STZ application, or ZR40402R41STZ equivalent, key selection criteria include low quiescent current, tight TC, slope resistance under load variation, transient immunity up to 200 mA, and compatibility with space-constrained through-hole layouts.

Technical Context

The ZR40402R41STZ implements a bandgap-based shunt reference architecture with internal curvature compensation, enabling stable 4.1 V output across −40°C to +85°C without external components. Its design achieves low dynamic impedance (0.55 Ω typical) and wideband noise of 90 µV_rms (10 Hz–10 kHz), supporting high-accuracy ADC biasing and precision oscillator trimming.

It operates as a two-terminal device with reverse-biased configuration: cathode (Pin 1) and anode (Pin 3), where Pin 2 is internally floating or tied to Pin 1 per E-Line package revision. Absolute maximum ratings include 25 mA continuous reverse current and 20 V processing voltage tolerance.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	4.1 V ±1% at 150 µA; enables accurate 12-bit+ system calibration without trimming.
Temp Coefficient (TC)	20 ppm/°C typical; ensures ≤±1.7 mV drift over −40°C to +85°C for stable sensor excitation.
Slope Resistance	0.55 Ω typical; maintains <±0.5 mV output shift under 1 mA load change, critical for ratiometric designs.
Operating Current Range	60 µA to 15 mA; supports ultra-low-power sleep modes and full-scale active measurement simultaneously.
Turn-on Time	<5 µs; allows rapid wake-up in duty-cycled data loggers without reference settling delay.
Dynamic Impedance	0.5 Ω to 1.2 Ω (100 Hz); suppresses ripple coupling into sensitive analog front-ends.
Wideband Noise	90 µV_rms (10 Hz–10 kHz); avoids quantization noise floor elevation in 16-bit SAR ADC references.

Pinout & Package

E-Line (3-pin TO-92 compatible) package with molded plastic body, axial lead form, and JEDEC-standard pinout: Pin 1 = Cathode, Pin 2 = NC (floating or internally connected to Pin 1), Pin 3 = Anode. RoHS-compliant, Pb-free, and rated for 500 mW power dissipation at 25°C ambient.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Cathode	Connected to regulated 4.1 V output node; must be decoupled locally if driving >100 pF loads.
Pin 2	No Connect / Tie-to-Cathode	Internally floating or bonded to Pin 1 depending on wafer lot; verify continuity before PCB layout.
Pin 3	Anode	Ground return path; requires low-impedance connection to system AGND for noise rejection.

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into compact PCBs without stability-compensation footprints or BOM overhead.
Stable with capacitive loads	Drives up to 1 nF directly-supports buffering for multi-channel ADC reference distribution.
Rugged 200 mA surge rating	Withstands ESD transients and inrush events without degradation, eliminating need for series fusing.
Industrial temperature range	Validated performance from −40°C to +85°C ensures reliability in field-deployed metering hardware.
Low 90 µV_rms noise	Preserves SNR in precision weigh scales and portable DMMs where reference noise dominates total error.

Applications

Battery-Powered Multimeters

Precision RTD Signal Conditioning

Use Scenario: Handheld digital multimeter operating from two AA cells with auto-ranging ADC and LCD backlight cycling.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.1 V for ADC reference rail and op-amp biasing.

Use Value: Enables 0.1% full-scale accuracy over battery discharge (0.9–1.5 V/cell) due to low 60 µA minimum operating current and flat TC.

Use Scenario: 4-wire RTD bridge circuit in industrial temperature transmitter with HART modulation.

IC Role / Device Role / Timing Role: Precision excitation source for constant-current generator and ratiometric ADC reference.

Use Value: 0.55 Ω slope resistance minimizes gain error shift across 4–20 mA loop current variations, maintaining ±0.05°C repeatability.

Portable Gas Detectors

Crystal Oscillator Frequency Calibration

Use Scenario: Electrochemical gas sensor module powered by Li-ion cell with 10-year shelf life requirement.

IC Role / Device Role / Timing Role: Reference for ultra-low-power microcontroller ADC sampling sensor output during periodic wake-ups.

Use Value: 60 µA min current and <5 µs turn-on allow sub-100 µA average system current, extending battery life beyond 5 years.

Use Scenario: Temperature-compensated crystal oscillator (TCXO) in GPS timing module requiring fine frequency trim.

IC Role / Device Role / Timing Role: Stable DC bias for varactor diode tuning network in VCXO feedback path.

Use Value: 20 ppm/°C TC and 90 µV_rms noise prevent phase jitter increase and long-term frequency drift in 10 MHz OCXO control loops.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDR	2.5 V nominal, adjustable via resistors; higher 2 mA min current; 50 ppm/°C TC.	Requires external resistor network; less suitable for fixed 4.1 V, ultra-low-I_Q use cases.	Select when adjustable output or higher current drive (>100 mA) is needed; not drop-in for ZR40402R41STZ footprint.
REF43 4.096V	4.096 V output, 3 ppm/°C max TC, 3.6 µA I_Q; SOIC-8 package only.	Lower noise (3.8 µV_rms) but requires PCB real estate and external decoupling; no through-hole option.	Choose for metrology-grade stability where board space permits SMT and cost premium is acceptable.

Compared with TL431ACDR and REF43, ZR40402R41STZ uniquely balances fixed 4.1 V accuracy, through-hole E-Line packaging, sub-100 µA operation, and rugged 200 mA surge tolerance-making it optimal for cost-sensitive, field-deployed portable instruments where reliability and layout simplicity are prioritized over ultra-low-noise or programmability.

Availability

ZR40402R41STZ is available at Aetrix Electronics and suitable for battery-powered test equipment, portable instrumentation, and industrial sensor transmitters requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZR40402R41STZ 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 devices, with broad portfolio coverage in power management, signal integrity, and precision analog solutions.

The ZR4040 series belongs to Diodes' precision shunt voltage reference product line, engineered specifically for low-power, high-stability applications in portable, industrial, and automotive-qualified measurement systems.

FAQ

What is the correct pin configuration for ZR40402R41STZ in E-Line package?

Pin 1 is Cathode (4.1 V output), Pin 2 is No Connect (internally floating or tied to Pin 1 depending on wafer revision), and Pin 3 is Anode (ground). Always verify Pin 2 continuity with Pin 1 using continuity test before finalizing PCB layout, as internal bonding varies by production lot.

Can ZR40402R41STZ drive a 1000 pF capacitive load without oscillation?

Yes-ZR40402R41STZ is explicitly characterized as stable with capacitive loads up to 1 nF without external compensation. This is confirmed in the datasheet's "Stable with Capacitive Loads" section and validated in typical characteristics curves showing flat transient response up to 1 nF.

What is the maximum safe reverse current during transient events?

The device withstands reverse current surges up to 200 mA for short durations, enabled by its 20 V process technology. This rating is distinct from the 25 mA absolute maximum continuous rating and is intended for ESD or inductive kickback scenarios-not sustained operation.

How does the 1% tolerance affect system-level calibration in a 16-bit ADC design?

At 1%, the initial error is ±41 mV on 4.1 V, contributing ~6.7 LSB error in a 4.1 V full-scale 16-bit ADC. However, combined with 20 ppm/°C TC and low slope resistance, system calibration at one temperature point can achieve <±2 LSB total error over industrial temperature range when used with proper layout and decoupling.

ZR40402R41STZ Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: E-Line-3

Series:: -

Packaging:: Tape & Box (TB)

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:: Through Hole

Supplier Device Package:: E-Line (TO-92 compatible)

ZR40402R41STZ FAQ

1.How can I place an order for ZR40402R41STZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40402R41STZ 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 ZR40402R41STZ reliable?

The price and inventory of ZR40402R41STZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40402R41STZ is usually 5 days.

3.What payment methods are accepted for ZR40402R41STZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40402R41STZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40402R41STZ?

ZR40402R41STZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40402R41STZ 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 ZR40402R41STZ?

For technical support, including ZR40402R41STZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40402R41STZ requirements.

6.How does Aetrix verify that ZR40402R41STZ is sourced from the original manufacturer or authorized distributors?

All ZR40402R41STZ 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 ZR40402R41STZ meets industry standards.

7.What is the process for return or replacement of ZR40402R41STZ?

All ZR40402R41STZ units undergo pre-shipment inspection (PSI). If there is an issue with ZR40402R41STZ, 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 ZR40402R41STZ part is unused and in its original packaging.

Return procedure for ZR40402R41STZ:

1.Submit a request within 90 days.

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

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