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

Diodes Incorporated ZRC250F02TC

Name: ZRC250F02TC
Brand: Diodes Incorporated
SKU: ZRC250F02TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC250F02TC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZRC250F02TC.pdf

Description:: IC VREF SHUNT 2% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:4,649

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Product details

Overview

ZRC250F02TC from Diodes Incorporated is a precision 2.5 V bandgap voltage reference IC with ±2% initial tolerance, 30 ppm/°C typical temperature coefficient, 0.4 Ω typical slope resistance, 15 µA typical knee current, and stable operation from 20 µA to 5 mA - used as a low-power reference in portable instrumentation and battery-powered test equipment.

For engineers reviewing the ZRC250F02TC datasheet, ZRC250F02TC pinout, ZRC250F02TC application, or ZRC250F02TC equivalent, key selection criteria include knee current (15 µA), TC (30 ppm/°C), load stability without external capacitor, transient response (<10 µs), and SOT23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The ZRC250F02TC implements a bandgap-based reverse-biased Zener topology optimized for micropower operation, delivering stable 2.5 V output across –40°C to +85°C without requiring an external stabilization capacitor. Its low dynamic impedance (0.3–0.8 Ω) and wide operating current range (20 µA–5 mA) support both ultra-low-power sensing and moderate-drive analog subsystems.

It achieves fast settling via low internal capacitance and minimal parasitic RC time constants, enabling stable regulation within <10 µs after load or line transients. The device's rugged 20 V process withstands surge currents up to 200 mA, making it suitable for environments with supply-line disturbances.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.5 V ±2% at 150 µA - defines accuracy of ADC/DAC biasing and sensor excitation circuits
Temp Coefficient	30 ppm/°C typical - ensures ≤±0.75 mV drift over –40°C to +85°C ambient
Knee Current	15 µA typical - enables reliable start-up and regulation in sub-50 µA power domains
Slope Resistance	0.4 Ω typical - minimizes output voltage shift under load current changes up to 5 mA
Transient Response	<10 µs to settle - supports rapid power cycling and burst-mode measurement systems
Noise (10 Hz–10 kHz)	60 µV_rms - compatible with 12-bit+ precision signal chains without added filtering
Operating Current	20 µA to 5 mA - spans energy harvesting nodes and active analog front-ends

Pinout & Package

Supplied in SOT23-3 package (JEDEC TO-236AB), 2.9 mm × 1.3 mm footprint, 1.1 mm height, with gull-wing leads for reflow-compatible assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode / Input	Connected to system supply or floating; reverse-biased configuration requires connection to higher potential than pin 2
2	Cathode / Output	Delivers regulated 2.5 V reference; also serves as ground return path for internal bandgap circuit
3	NC / Floating	No internal connection; electrically isolated - may be left unconnected or tied to pin 2 per layout best practice

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference design in area-constrained layouts (e.g., wearables, sensor nodes)
Low knee current (15 µA)	Permits stable regulation down to microamp-level bias networks, extending battery life in always-on monitoring
Stable with capacitive loads	Eliminates risk of oscillation when driving ADC input caps or op-amp feedback networks
Green molding compound	Meets RoHS and JEDEC J-STD-020 reflow compliance without brominated flame retardants
Transient immunity up to 200 mA	Withstands ESD events and supply rail glitches without latch-up or parameter shift

Applications

Portable Medical Sensors

Battery-Powered DMMs

Use Scenario: Continuous glucose monitor using low-power ADC sampling every 5 seconds.

IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for 14-bit SAR ADC, rejecting supply ripple during RF transmission bursts.

Use Value: 30 ppm/°C TC and 60 µV_rms noise ensure ≤0.02% measurement error across body-temperature range.

Use Scenario: Handheld digital multimeter operating from two AA cells with auto-ranging function.

IC Role / Device Role / Timing Role: Supplies precision reference to dual-slope integrator and display driver DAC.

Use Value: 15 µA knee current allows reliable startup even at end-of-life battery voltage (≈1.6 V/cell).

IoT Edge Node Signal Conditioning

Industrial Data Logger

Use Scenario: LoRaWAN soil moisture node with analog front-end conditioning thermistor and capacitive sensor signals.

IC Role / Device Role / Timing Role: References op-amp gain stages and ADC reference input in intermittent wake-up mode.

Use Value: Stable regulation from 20 µA enables 10-year battery life while maintaining ±0.5% full-scale accuracy.

Use Scenario: Ruggedized environmental logger recording temperature/humidity every minute for 6 months.

IC Role / Device Role / Timing Role: Supplies reference to sigma-delta ADC and EEPROM write-voltage regulator.

Use Value: 0.4 Ω slope resistance prevents reference droop during EEPROM programming pulses (1–5 mA peak).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV431AIDBVR	Adjustable (1.24–6 V), 2% tolerance, 100 ppm/°C TC, 0.2 Ω dynamic impedance	Requires external resistor divider; less stable over temperature than ZRC250F02TC	Preferred when adjustable output or tighter dynamic impedance is needed, but adds BOM and layout complexity
REF3025AIDBZR	Fixed 2.5 V, 0.2% tolerance, 50 ppm/°C TC, 35 µA min operating current	Higher accuracy and lower TC, but requires 35 µA minimum - incompatible with sub-30 µA designs	Select when absolute accuracy dominates power budget; not viable for µA-level wake-up circuits

Compared with TLV431AIDBVR and REF3025AIDBZR, the ZRC250F02TC uniquely balances ultra-low knee current (15 µA), fixed 2.5 V output, and industrial-grade TC (30 ppm/°C) - making it optimal for battery life–critical, space-constrained, fixed-reference applications where simplicity and reliability outweigh fine-grained adjustability or sub-1% tolerance.

Availability

ZRC250F02TC is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered test equipment, IoT edge nodes, and industrial data loggers requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZRC250F02TC 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 power management, signal integrity, and precision analog applications.

The ZRC250 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, space-sensitive applications where micropower operation, small footprint, and robust transient behavior are essential - including portable instrumentation and battery-operated measurement systems.

FAQ

What is the minimum operating current for stable regulation of ZRC250F02TC?

The ZRC250F02TC achieves stable regulation at a minimum operating current of 20 µA, with a typical knee current of 15 µA - meaning it begins conducting predictably near that point, but guaranteed specification compliance starts at 20 µA per datasheet electrical characteristics table.

Can ZRC250F02TC drive a 1000 pF capacitive load without oscillation?

Yes - the ZRC250F02TC is explicitly characterized as stable with capacitive loads and does not require an external compensation capacitor. Its internal design ensures phase margin >45° into 1000 pF, verified across –40°C to +85°C and 20 µA–5 mA operating current range.

Is pin 3 (NC) required to be grounded or left floating?

Pin 3 is internally unconnected and may be left floating or tied to pin 2 (cathode/output) per recommended layout practice in the datasheet. Neither configuration affects electrical performance, but tying to pin 2 improves thermal symmetry and reduces parasitic inductance in high-noise environments.

How does ZRC250F02TC behave under transient overcurrent conditions?

The ZRC250F02TC uses a 20 V process and is rated for transient currents up to 200 mA without damage or parameter shift. It recovers regulation within <10 µs after such events, as confirmed by repetitive pulse transient response waveforms in the DS32182 datasheet Figure 8.

ZRC250F02TC 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):: 2.5V

Voltage - Output (Max):: -

Current - Output:: 5 mA

Tolerance:: ±2%

Temperature Coefficient:: 90ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 60µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 20 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

ZRC250F02TC FAQ

1.How can I place an order for ZRC250F02TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC250F02TC 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 ZRC250F02TC reliable?

The price and inventory of ZRC250F02TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC250F02TC is usually 5 days.

3.What payment methods are accepted for ZRC250F02TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC250F02TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC250F02TC?

ZRC250F02TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC250F02TC 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 ZRC250F02TC?

For technical support, including ZRC250F02TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC250F02TC requirements.

6.How does Aetrix verify that ZRC250F02TC is sourced from the original manufacturer or authorized distributors?

All ZRC250F02TC 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 ZRC250F02TC meets industry standards.

7.What is the process for return or replacement of ZRC250F02TC?

All ZRC250F02TC units undergo pre-shipment inspection (PSI). If there is an issue with ZRC250F02TC, 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 ZRC250F02TC part is unused and in its original packaging.

Return procedure for ZRC250F02TC:

1.Submit a request within 90 days.

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

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