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

Diodes Incorporated ZR40402F50TC

Name: ZR40402F50TC
Brand: Diodes Incorporated
SKU: ZR40402F50TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40402F50TC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZR40402F50TC.pdf

Description:: IC VREF SHUNT 2% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:3,440

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Product details

Overview

ZR40402F50TC from Diodes Incorporated is a precision micropower shunt voltage reference delivering 5.0 V ±2% output with 20 ppm/°C typical temperature coefficient, 0.33 Ω typical slope resistance, and stable operation from 60 µA to 15 mA. It operates without external stabilization capacitors and achieves full regulation in <10 µs, making it ideal for battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZR40402F50TC datasheet, ZR40402F50TC pinout, ZR40402F50TC application, or ZR40402F50TC equivalent, key selection criteria include low-quiescent-current stability, TC performance across –55°C to +125°C, transient response under capacitive load, and SOT23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The ZR40402F50TC implements a bandgap-based shunt reference architecture, operating in reverse breakdown mode with cathode-anode current flow. Its internal design eliminates need for external compensation while maintaining stability with capacitive loads up to 1 µF.

It features a two-terminal topology (anode/cathode) with no third terminal for adjustment or enable control. The device's slope resistance (0.33 Ω typ) and dynamic impedance (0.4 Ω at 1 mA, 100 Hz) directly determine output voltage variation under load current changes and AC ripple rejection.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.00 V ±2% at 150 µA; ensures accurate ADC/DAC biasing in 5 V systems
Temp. Coefficient	20 ppm/°C typ (–40°C to +85°C); enables ≤0.5 mV drift over industrial range
Slope Resistance	0.33 Ω typ; limits output voltage shift to <5 mV for 15 mA load change
Operating Current	60 µA min to 15 mA max; supports ultra-low-power sleep modes and active measurement cycles
Transient Response	Stabilizes in <10 µs; suitable for fast-switching power monitoring and burst-mode sensing
Wideband Noise	105 µV_rms (10 Hz–10 kHz); meets precision analog front-end requirements for 12-bit+ resolution

Pinout & Package

SOT23-3 package (suffix F), surface-mount, 1.3 mm × 2.9 mm footprint. Pin 1 is floating or internally connected to Pin 2 per datasheet; Pin 2 = Cathode, Pin 3 = Anode.

Pin/Terminal	Circuit Role	Design Meaning
Pin 2 (Cathode)	Reference Output Node	Connected to regulated 5.0 V node; sinks current from external circuitry
Pin 3 (Anode)	Ground Reference Terminal	Return path for reference current; must be low-impedance to system ground
Pin 1	No-connect / Internally tied to Pin 2	Not used in standard operation; may be left unconnected or tied to cathode for mechanical stability

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into compact sensor nodes without added BOM cost or layout area
Stable with capacitive loads	Supports direct connection to ADC input caps or LDO bypass networks without oscillation risk
20 ppm/°C tempco (typ)	Meets Class A accuracy requirements for portable multimeters and handheld calibrators
Sub-10 µs transient recovery	Allows use in duty-cycled power rails where reference must settle before sampling window
–55°C to +125°C operation	Validated for automotive under-hood and industrial motor-control environments

Applications

Battery-Powered Multimeters

Portable Data Loggers

Use Scenario: Handheld digital multimeter requiring stable 5 V reference for 16-bit sigma-delta ADC during 100 ms measurement bursts.

IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling reference for analog front-end and ADC conversion.

Use Value: 20 ppm/°C TC and <10 µs settling ensure consistent accuracy across ambient temperature swings and rapid on-demand measurements.

Use Scenario: Solar-powered environmental logger sampling temperature/humidity every 5 minutes using microcontroller with internal ADC.

IC Role / Device Role / Timing Role: Precision bias source enabling low-power ADC operation at 60 µA quiescent current during sleep intervals.

Use Value: Micropower operation extends battery life beyond 2 years; no capacitor reduces bill-of-materials count.

Industrial Sensor Transmitters

Calibration Equipment

Use Scenario: 4–20 mA loop-powered pressure transmitter operating in factory-floor enclosures at 85°C ambient.

IC Role / Device Role / Timing Role: Stable 5.0 V reference for DAC generating loop current setpoint and sensor signal conditioning.

Use Value: Guaranteed operation to +125°C and 40 ppm/°C max TC over full range ensure calibration integrity in high-temp industrial zones.

Use Scenario: Benchtop voltage calibrator verifying 5 V outputs of lab power supplies with ±0.01% absolute accuracy.

IC Role / Device Role / Timing Role: Primary reference element in closed-loop feedback path of programmable reference generator.

Use Value: 2% initial tolerance and low 0.33 Ω slope resistance minimize gain error and load-induced drift during calibration sweeps.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDBVR	Adjustable output (2.5 V base), higher 2 mA min cathode current, 22 Ω typical slope resistance	Requires external resistor divider; less suitable for fixed 5 V, ultra-low-I_Q designs	Select when adjustable reference or higher current drive is needed; not drop-in for micropower 5 V use
MAX6008AEUR+T	Fixed 5.0 V, 15 ppm/°C max TC, 65 µA max quiescent current, SOT23-3	Tighter TC and lower I_Q, but rated only to +85°C ambient and lacks automotive temp grade	Prefer for commercial-grade portable gear where extended temperature is not required

Compared with TL431ACDBVR and MAX6008AEUR+T, the ZR40402F50TC uniquely balances automotive-grade temperature range (–55°C to +125°C), micropower operation (60 µA min), and fixed 5.0 V output - making it optimal for ruggedized, battery-constrained instrumentation where reliability and simplicity are prioritized over adjustability or sub-15 ppm TC.

Availability

ZR40402F50TC is available at Aetrix Electronics and suitable for battery-powered test equipment, portable instrumentation, and industrial sensor transmitters requiring stable component supply with long-lifecycle support.

Supply support for ZR40402F50TC 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 power management, signal integrity, and protection applications.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered specifically for space-constrained, low-power, and wide-temperature industrial and automotive measurement systems.

FAQ

What is the minimum operating current for reliable regulation?

The ZR40402F50TC maintains regulation down to 60 µA at 25°C, with a guaranteed minimum of 30 µA across –55°C to +125°C. Below this threshold, output voltage deviates nonlinearly and cannot be relied upon for precision applications.

Can it drive a 1 µF bypass capacitor directly?

Yes - the ZR40402F50TC is explicitly characterized as stable with capacitive loads up to 1 µF without external series resistance or compensation, per its datasheet Figure 4-182 and stability testing.

Is the SOT23-3 pinout compatible with standard Zener diode footprints?

No - although physically similar to generic SOT23 packages, Pin 1 is NC or tied to cathode (Pin 2), and Pin 3 is anode. Standard Zener footprints assume anode-cathode orientation matching TO-92 or DO-35; misalignment risks reverse bias failure.

Does it require derating above 70°C ambient?

Yes - power dissipation must be linearly derated above 70°C ambient per the SOT23 package thermal limit of 330 mW at 25°C and 0.67 mW/°C slope. At 100°C ambient, max allowable power drops to ~130 mW, limiting usable current to ~26 mA at 5 V.

ZR40402F50TC 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):: 5V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±2%

Temperature Coefficient:: 100ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 105µVrms

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

ZR40402F50TC FAQ

1.How can I place an order for ZR40402F50TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40402F50TC 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 ZR40402F50TC reliable?

The price and inventory of ZR40402F50TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40402F50TC is usually 5 days.

3.What payment methods are accepted for ZR40402F50TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40402F50TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40402F50TC?

ZR40402F50TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40402F50TC 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 ZR40402F50TC?

For technical support, including ZR40402F50TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40402F50TC requirements.

6.How does Aetrix verify that ZR40402F50TC is sourced from the original manufacturer or authorized distributors?

All ZR40402F50TC 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 ZR40402F50TC meets industry standards.

7.What is the process for return or replacement of ZR40402F50TC?

All ZR40402F50TC units undergo pre-shipment inspection (PSI). If there is an issue with ZR40402F50TC, 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 ZR40402F50TC part is unused and in its original packaging.

Return procedure for ZR40402F50TC:

1.Submit a request within 90 days.

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

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