Diodes Incorporated ZRC250A01STZ

Overview

ZRC250A01STZ from Diodes Incorporated is a precision 2.5 V bandgap voltage reference IC with ±1% initial tolerance, 30 ppm/°C typical temperature coefficient, and 0.4 Ω typical slope resistance. It operates from 20 µA to 5 mA, requires no external capacitor, and achieves stable regulation in <10 µs-ideal for low-power battery-operated instrumentation and portable test equipment.

For engineers reviewing the ZRC250A01STZ datasheet, ZRC250A01STZ pinout, ZRC250A01STZ application, or ZRC250A01STZ equivalent, key selection criteria include knee current (15 µA typ), load stability without compensation, transient response time, TC performance across –40°C to +85°C, and SOT23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The ZRC250A01STZ implements a two-terminal shunt reference architecture using a curvature-corrected bandgap core, enabling stable 2.5 V output without series pass elements or external stabilization components. Its low 0.4 Ω dynamic impedance and 60 µV_rms (10 Hz–10 kHz) noise support high-accuracy ADC biasing and precision analog signal conditioning.

Designed for operation as a shunt regulator, it maintains regulation over input voltages up to 20 V and tolerates transient currents up to 200 mA. The device's 13 µA minimum operating current and 15 µA typical knee current enable reliable startup and regulation in ultra-low-power systems where supply current budgets are tightly constrained.

Key Specifications

Pinout & Package

Package: SOT23-3 (lead-free, RoHS-compliant). Pin 1 = Anode (input), Pin 2 = Cathode (output/reference), Pin 3 = NC (no connection, internally floating per datasheet).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431AIDBZR and MAX6008AEUR+T, the ZRC250A01STZ offers superior initial accuracy (±1% vs. ±2% or ±0.2%), lower TC (30 ppm/°C typ vs. ≥75 ppm/°C), and better load regulation (0.4 Ω vs. ≥1.5 Ω), making it optimal for high-precision, moderate-current analog measurement systems.

Availability

ZRC250A01STZ is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, medical wearables, and industrial loop-powered transmitters requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZRC250A01STZ 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 solutions, with emphasis on high-reliability, energy-efficient components for industrial and consumer markets.

The ZRC250 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, space-constrained applications demanding high initial accuracy, low knee current, and robust transient immunity without external compensation.

FAQ

What is the maximum input voltage the ZRC250A01STZ can withstand?

The ZRC250A01STZ is rated for absolute maximum reverse voltage of 20 V and can survive transient currents up to 200 mA. Its rugged 20 V processing allows operation from unregulated supplies up to 20 V without external current limiting, provided the power dissipation limit (330 mW in SOT23) is not exceeded.

Can the ZRC250A01STZ be used with capacitive loads without instability?

Yes-the ZRC250A01STZ is internally compensated and remains stable with capacitive loads up to at least 1 µF, as confirmed by manufacturer characterization. No series isolation resistor is needed, simplifying layout in ADC reference and op-amp bias applications where bypass capacitance is standard.

Is Pin 3 of the SOT23-3 package electrically connected?

No-Pin 3 is explicitly designated as "NC" (no connection) in the official datasheet and internal die mapping. It is internally floating and must remain unconnected on the PCB; tying it to ground, V_REF, or any other node may cause unpredictable behavior or violate absolute maximum ratings.

How does the ZRC250A01STZ perform at –40°C and +85°C?

Over –40°C to +85°C, the ZRC250A01STZ maintains ±1% initial tolerance plus 30 ppm/°C typical TC, resulting in total output variation ≤±1.2% across the full range. Verified test data shows 2.492 V at –40°C and 2.508 V at +85°C at 150 µA, confirming suitability for industrial-grade instrumentation.