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

Diodes Incorporated ZR285F01TC

Name: ZR285F01TC
Brand: Diodes Incorporated
SKU: ZR285F01TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR285F01TC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZR285F01TC.pdf

Description:: IC VREF SHUNT 1% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,202

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Product details

Overview

ZR285F01TC from Diodes Incorporated is a precision 2.5 V micropower voltage reference IC using bandgap circuit design, rated for ±2% initial tolerance, 30 ppm/°C typical temperature coefficient, and stable operation from 20 µA to 20 mA supply current - deployed in battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZR285F01TC datasheet, ZR285F01TC pinout, ZR285F01TC application, or ZR285F01TC equivalent, key selection criteria include low knee current (15 µA typ), slope resistance (0.4 Ω typ), wideband noise (60 µV_rms), capacitive load stability, and SOT23-3 package compatibility.

Technical Context

The ZR285F01TC operates as a two-terminal shunt voltage reference with reverse breakdown topology, requiring no external stabilization capacitor while maintaining stability into capacitive loads up to 1 µF. Its bandgap core delivers 2.5 V output with TC of 30 ppm/°C (typ) over –40°C to +85°C.

It achieves fast turn-on settling in microseconds and supports transient currents up to 200 mA due to rugged 20 V process technology. Electrical behavior is defined across 13 µA to 30 mA operating current, with slope resistance of 0.4 Ω (typ) and dynamic impedance of 0.3 Ω (typ) at 1 mA.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	2.5 V ±2% - precise setpoint for ADC biasing, DAC calibration, and sensor excitation circuits.
Temp Coefficient	30 ppm/°C (typ) - ensures ≤0.75 mV drift over full industrial temperature range (–40°C to +85°C).
Min Operating Current	13 µA (min) - enables ultra-low-power wake-up modes in battery-backed systems.
Slope Resistance	0.4 Ω (typ) - minimizes output voltage shift under varying load current, critical for high-accuracy feedback loops.
Wideband Noise	60 µV_rms (10 Hz–10 kHz) - supports 16-bit+ resolution in precision measurement front-ends without added filtering.
Capacitive Load Stability	Stable with ≥0 pF - eliminates need for external compensation capacitor, reducing BOM count and PCB area.

Pinout & Package

Package: SOT23-3 (JEDEC TO-236AB), 2.80 × 2.10 × 1.12 mm body, gull-wing leads, tape-and-reel (3000 pcs/reel).

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Current sink input	Connected to system ground or regulated rail; current flows into this terminal to establish reference voltage at cathode.
Cathode (Pin 2)	Reference output	Provides stable 2.5 V output; must be decoupled locally if driving noisy loads or long traces.
No-Connect (Pin 3)	Unused terminal	Floating or tied to Pin 2 per datasheet recommendation; no internal connection - omitted in simplified schematics.

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCBs without stability-compromising layout dependencies.
Low knee current (15 µA typ)	Allows reliable regulation down to sub-20 µA bias, essential for energy-harvesting and coin-cell applications.
Fast turn-on time (µs scale)	Supports duty-cycled power management where reference must settle before ADC conversion begins.
Rugged 200 mA surge rating	Withstands ESD transients and inrush events without degradation, improving field reliability in industrial environments.

Applications

Battery-Powered Portable Meters

Precision Data Acquisition Front-Ends

Use Scenario: Handheld multimeters and clamp meters powered by single AA/AAA cells with intermittent display and measurement cycles.

IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V for 16-bit sigma-delta ADC reference input and analog front-end biasing.

Use Value: Enables <1 LSB integral nonlinearity error over temperature and battery discharge, extending usable battery life via µA-level quiescent operation.

Use Scenario: Industrial PLC analog input modules digitizing 4–20 mA sensor signals with 0.1% accuracy requirements.

IC Role / Device Role / Timing Role: Precision voltage reference for programmable gain instrumentation amplifier (PGIA) and SAR ADC reference buffer stage.

Use Value: Delivers <±0.5 mV total error (initial + temp drift + noise) across –40°C to +85°C, meeting IEC 61000-6-2 immunity margins.

Portable Medical Diagnostic Sensors

Calibrated Test Equipment Power Rails

Use Scenario: Wearable ECG/SpO₂ monitors requiring FDA-grade signal fidelity and multi-year battery operation.

IC Role / Device Role / Timing Role: Reference source for analog sensor signal conditioning and low-noise LDO feedback divider network.

Use Value: 60 µV_rms noise floor and 30 ppm/°C TC ensure <0.01% gain drift in biopotential amplifiers, preserving diagnostic sensitivity.

Use Scenario: Benchtop DMMs and automated test equipment requiring traceable, repeatable DC voltage outputs.

IC Role / Device Role / Timing Role: Primary reference in digitally trimmed 5 V/2.5 V dual-rail power subsystems with auto-calibration routines.

Use Value: ±2% initial tolerance and monotonic TC behavior allow one-time factory calibration without periodic re-trimming.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431AIDBZR	Adjustable (2.5 V fixed option), 2% tol, 50 ppm/°C max TC, 0.5 Ω slope resistance	Requires external resistors for fixed 2.5 V; higher TC increases drift in wide-temp deployments	Preferred when adjustable reference capability is needed alongside fixed mode; less optimal for minimal-component-count designs
REF3025AIDBZR	Series topology, 2.5 V fixed, 0.2% tol, 50 ppm/°C max TC, 3.3 V min supply	Requires minimum 3.3 V supply; incompatible with 2.7 V or coin-cell systems	Chosen for ultra-high-precision applications where supply headroom permits; not viable for low-voltage shunt configurations

Compared with TLVH431AIDBZR and REF3025AIDBZR, the ZR285F01TC uniquely combines true shunt operation, no-supply-headroom requirement, sub-20 µA start-up, and SOT23-3 footprint - making it irreplaceable in ultra-low-power, space-constrained, single-supply systems where series references fail.

Availability

ZR285F01TC is available at Aetrix Electronics and suitable for battery-powered portable meters, precision data acquisition front-ends, and calibrated test equipment requiring stable component supply across extended product lifecycles.

Supply support for ZR285F01TC 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 ZR285 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, space-sensitive applications demanding stable 2.5 V references without external compensation.

FAQ

What is the maximum capacitive load the ZR285F01TC can drive without oscillation?

The ZR285F01TC is specified as stable with any capacitive load, including 0 pF - no external capacitor is required for stability. Datasheet testing confirms robust phase margin up to 1 µF, enabling direct connection to ADC reference inputs, LDO feedback nodes, and sampling capacitors without risk of ringing or overshoot.

Can the ZR285F01TC operate reliably below 20 µA?

Yes - the ZR285F01TC maintains regulation down to 13 µA (minimum operating current), with 15 µA typical knee current. At 15 µA, output voltage remains within ±2% tolerance and TC performance holds; however, noise increases slightly above 100 µV_rms below 20 µA, which should be verified against system SNR targets.

Is Pin 3 (NC) electrically isolated or internally bonded?

Pin 3 is a true no-connect terminal with no internal bond wire or silicon connection. The datasheet explicitly states it may be left floating or tied to Pin 2 (cathode) for mechanical reinforcement - no electrical function is assigned, and connecting it elsewhere introduces no risk of shorting or parametric shift.

How does the ZR285F01TC handle transient overcurrent events?

The ZR285F01TC withstands transient currents up to 200 mA due to its 20 V process technology and rugged junction design. Absolute maximum forward current is 25 mA continuous, but brief surges (≤100 µs) at 200 mA cause no parameter shift or latch-up, making it suitable for environments with ESD coupling or inductive kickback near reference nodes.

ZR285F01TC 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:: 20 mA

Tolerance:: ±1%

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

ZR285F01TC FAQ

1.How can I place an order for ZR285F01TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR285F01TC 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 ZR285F01TC reliable?

The price and inventory of ZR285F01TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR285F01TC is usually 5 days.

3.What payment methods are accepted for ZR285F01TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR285F01TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR285F01TC?

ZR285F01TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR285F01TC 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 ZR285F01TC?

For technical support, including ZR285F01TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR285F01TC requirements.

6.How does Aetrix verify that ZR285F01TC is sourced from the original manufacturer or authorized distributors?

All ZR285F01TC 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 ZR285F01TC meets industry standards.

7.What is the process for return or replacement of ZR285F01TC?

All ZR285F01TC units undergo pre-shipment inspection (PSI). If there is an issue with ZR285F01TC, 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 ZR285F01TC part is unused and in its original packaging.

Return procedure for ZR285F01TC:

1.Submit a request within 90 days.

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

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