Diodes Incorporated ZRT062GC1TA

Overview

ZRT062GC1TA from Zetex Semiconductors is a precision shunt voltage reference IC delivering 6.17 V at 500 µA with ±1% initial tolerance, 15 ppm/°C typical temperature coefficient, and 150 µA knee current. It operates from –40°C to +85°C in SOT223 package and supports trim-adjustable output for system-level calibration in analog measurement circuits.

For engineers reviewing the ZRT062GC1TA datasheet, ZRT062GC1TA pinout, ZRT062GC1TA application, or ZRT062GC1TA equivalent, key selection criteria include trim range (±5%), slope resistance (1.4 Ω typ), low-noise operation (50 µV_p-p, 0.1–10 Hz), and absence of required external stabilization capacitor.

Technical Context

The ZRT062GC1TA functions as a two-terminal shunt reference, regulating voltage by sinking adjustable current through its cathode-anode path. Its internal bandgap core achieves stable 6.17 V output with trimmable feedback via an external resistor network connected to the TRIM pin.

It exhibits low dynamic impedance (1.4 Ω typ) and minimal thermal drift (15 ppm/°C typ), enabling high-accuracy ADC/DAC biasing and sensor excitation where supply headroom is constrained and temperature-induced error must be minimized.

Key Specifications

Pinout & Package

Supplied in SOT223 surface-mount package (4-pin, pin 4 internally floating or tied to pin 2 per datasheet top view). Thermal pad on underside enhances power dissipation up to 2 W at 25°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL431ACDBVR and REF5062AIDR, the ZRT062GC1TA uniquely balances ±1% initial accuracy, ±5% field trim, ultra-low knee current, and SOT223 thermal performance-making it optimal for industrial analog I/O modules requiring recalibration flexibility and robust thermal behavior.

Availability

ZRT062GC1TA is available at Aetrix Electronics and suitable for industrial sensor transmitters, portable data loggers, PLC analog input modules, and medical patient monitoring front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ZRT062GC1TA 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

Zetex Semiconductors (now part of Diodes Incorporated) specialized in high-performance analog and discrete semiconductors, with emphasis on precision references, low-noise transistors, and rugged power devices.

The ZRT series was engineered specifically for industrial and instrumentation applications demanding stable, trimmable, low-power voltage references in compact surface-mount packages-prioritizing thermal robustness and system-level calibration flexibility.

FAQ

What is the function of the TRIM pin on ZRT062GC1TA?

The TRIM pin enables adjustment of the output voltage over a ±5% range using an external resistor or potentiometer. When not used, it must be left open-circuit. This feature allows compensation for system-level errors such as PCB trace resistance, op-amp input offset, or sensor nonlinearity without replacing the reference IC.

Can ZRT062GC1TA operate without an external capacitor?

Yes. Unlike many shunt references, the ZRT062GC1TA is internally compensated and does not require an external stabilization capacitor for stable operation across its full current range (150 µA to 50 mA), reducing component count and PCB area in space-constrained designs.

How does the SOT223 package impact thermal performance?

The SOT223 package features an exposed thermal pad electrically tied to the cathode (pin 2), enabling direct soldering to large PCB copper areas. This configuration supports up to 2 W power dissipation at 25°C ambient and reduces junction-to-board thermal resistance to ~25°C/W, critical for sustained operation in industrial enclosures.

What is the significance of the 150 µA knee current specification?

The 150 µA knee current is the minimum cathode current required to initiate regulation. Below this, output voltage drops nonlinearly. This low value allows the device to maintain stable reference operation during ultra-low-power sleep modes-enabling energy-efficient wake-up sequencing in battery-powered instrumentation and remote sensors.