Diodes Incorporated ZXCT1030N8TA

Overview

ZXCT1030N8TA from Diodes Incorporated is a high-side current monitor IC with integrated voltage reference and non-latching open-collector comparator, designed for ground-plane-intact load current sensing in power rails from 2.2 V to 20 V. It delivers 10× gain (±3% accuracy), 3–6 MHz bandwidth, and 30 ppm/°C VOUT temperature coefficient, enabling precise overcurrent detection in battery chargers and electronic fuses.

For engineers reviewing the ZXCT1030N8TA datasheet, ZXCT1030N8TA pinout, ZXCT1030N8TA application, or ZXCT1030N8TA equivalent, key selection criteria include its 2.2–20 V supply range, 10 mV–500 mV sense voltage support, 100 ns comparator propagation delay, SO8 package compatibility, and VREF_OUT stability under ±300 µA sourcing/sinking.

Technical Context

The ZXCT1030N8TA implements a fixed-gain (10×) transconductance amplifier architecture that translates high-side sense voltage (VSENSE = VSENSE+ − VSENSE−) into a ground-referenced VOUT with linear response across 2.2–20 V common-mode input range. Its internal bandgap reference (1.24 V ±20 mV) feeds a user-configurable comparator via VCOMP_IN, supporting threshold setting from 5 mV to 10 V using external resistors.

The comparator features 15 mV hysteresis, 100 ns propagation delay, and open-collector VCOMP_OUT capable of sinking 2 mA, allowing direct interface with logic-level or higher-voltage pull-up rails. Stability is ensured by decoupling VCC–GND with ≥10 µF ceramic capacitance.

Key Specifications

Pinout & Package

Package: SO8 (Small Outline Integrated Circuit, 150 mil width, 1.27 mm pitch).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current monitor with comparator applications.

Compared with MAX4080TASA+ and INA219BIDR, the ZXCT1030N8TA uniquely integrates reference, 10× amplifier, and non-latching comparator in SO8 - delivering self-contained, analog-based overcurrent protection with minimal external components and deterministic 100 ns response.

Availability

ZXCT1030N8TA is available at Aetrix Electronics and suitable for battery charger protection, electronic fuse implementation, DC motor stall detection, and inrush current limiting requiring stable component supply and long-term production continuity.

Supply support for ZXCT1030N8TA 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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The ZXCT1030 belongs to Diodes' current sensing product line, engineered specifically for cost-sensitive, high-speed overcurrent protection in DC power systems where ground-plane integrity and fast hardware-level fault response are mandatory.

FAQ

What is the maximum sense voltage (VSENSE) the ZXCT1030N8TA can accurately measure?

The ZXCT1030N8TA supports VSENSE = (VSENSE+ − VSENSE−) from 10 mV to 500 mV, with guaranteed linearity and ±3% accuracy across this range. At 500 mV input, VOUT reaches ~5.5 V, remaining within its specified output swing. Operation beyond 500 mV may cause saturation or reduced accuracy per datasheet electrical characteristics.

Can VCOMP_OUT drive a standard 5 V logic input directly?

Yes - VCOMP_OUT is an open-collector output rated for 2 mA sink current and compatible with pull-up to any rail ≤ VIN (20 V). When pulled up to 5 V with a 10–100 kΩ resistor, it delivers clean active-low logic transitions with VOL ≤ 200 mV at 2 mA, meeting standard TTL/CMOS input thresholds without level-shifting.

Does the ZXCT1030N8TA require external compensation capacitors?

No external compensation is required. The device is internally compensated for unity-gain stability. However, a 10 µF ceramic decoupling capacitor between VCC and GND is mandatory per datasheet recommendations to suppress supply noise and ensure stable operation under fast transient loads, especially in switch-mode applications.

How does the ZXCT1030N8TA behave when VSENSE+ drops below 2.2 V?

When VSENSE+ falls below 2.2 V (e.g., during short-circuit or brownout), the comparator defaults to asserted (low) state regardless of VCOMP_IN. This fail-safe behavior prevents latch-up in closed-loop systems by forcing fault signaling even when supply or sense voltage collapses - a deliberate design feature documented in the "Typical Application Circuits" section.