Diodes Incorporated ZXCT214ADW-7

Overview

ZXCT214ADW-7 from Diodes Incorporated is a zero-drift, high-precision current-sense amplifier with 100 V/V fixed gain, designed for unidirectional or bidirectional current monitoring across shunt resistors at common-mode voltages from –0.3 V to 26 V. It delivers ±75 µV max input offset voltage, ±0.8% max gain error over temperature, and rail-to-rail output swing while operating from 2.7 V to 26 V supply with ≤100 µA quiescent current. Used in server power rails and battery management systems where 10 mV full-scale shunt drop enables low-loss, high-accuracy measurement.

For engineers reviewing the ZXCT214ADW-7 datasheet, ZXCT214ADW-7 pinout, ZXCT214ADW-7 application, or ZXCT214ADW-7 equivalent, this page provides verified technical context, validated pin functions, real-world use scenarios, and confirmed alternative options for precision current sensing in industrial, telecom, and computing power systems.

Technical Context

The ZXCT214ADW-7 implements a chopper-stabilized zero-drift architecture to maintain ±0.5 µV/°C max offset drift and 10 ppm/°C max gain drift across –40°C to +125°C. Its differential input stage supports high-side and low-side configurations with 120 dB typical CMRR and 100 dB min CMRR over full temperature range.

It features internal gain-setting resistors (10 kΩ) optimized for 100 V/V operation, rail-to-rail output capable of sourcing/sinking ≥1 mA, and stable operation with ≤1 nF capacitive load. Input bias current remains ≤35 µA across –0.3 V to 26 V common-mode range, enabling accurate sensing without significant shunt error.

Key Specifications

Pinout & Package

Package: SOT363 (6-pin, 2.1 mm × 2.0 mm × 1.0 mm), surface-mount, RoHS-compliant, halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision current sensing applications.

Compared with INA240A1IDR and MAX4080TASA+, the ZXCT214ADW-7 uniquely balances 100 V/V gain, 26 V common-mode tolerance, REF-based bidirectionality, and ±75 µV offset-making it optimal for 12–24 V industrial and computing systems requiring flexible, low-power, high-accuracy current feedback.

Availability

ZXCT214ADW-7 is available at Aetrix Electronics and suitable for server power rail monitoring, battery management systems, industrial PLC power modules, and telecom rectifier units requiring stable component supply with guaranteed long-term availability.

Supply support for ZXCT214ADW-7 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 for power management, signal integrity, and connectivity applications.

The ZXCT21x series belongs to Diodes' precision analog portfolio, engineered specifically for high-accuracy, low-loss current sensing in industrial, computing, and telecom infrastructure where wide common-mode range and zero-drift stability are critical.

FAQ

What is the maximum common-mode voltage the ZXCT214ADW-7 can measure?

The ZXCT214ADW-7 supports a common-mode input range of –0.3 V to 26 V. This allows direct high-side sensing on 24 V rails without external level-shifting circuitry. The device's internal architecture maintains accuracy even when VIN+ exceeds V+, provided the absolute maximum ratings (e.g., differential input ≤ ±26 V) are respected.

Can the ZXCT214ADW-7 be used for bidirectional current sensing?

Yes - by applying a stable bias voltage (e.g., V+/2) to the REF pin, the OUT pin swings above and below that reference in proportion to forward or reverse current flow. This enables single-supply MCU ADCs to resolve both charge and discharge directions, as validated in battery management applications per the datasheet's Figure 20.

What shunt resistor value is recommended for 100 A full-scale measurement?

For 100 A full-scale with 10 mV shunt drop, use R_SHUNT = 100 µΩ. At 100 A, power dissipation is 1.0 W (I²R), but the ZXCT214ADW-7's 10 mV full-scale design minimizes loss versus conventional 50 mV shunts. Layout must minimize parasitic resistance in Kelvin connections to preserve ±0.8% gain accuracy.

Does the SOT363 package require special thermal handling in high-current PCB layouts?

Yes - the SOT363 has R_θJA = 228 °C/W. For continuous 100 µA operation, junction rise is negligible, but PCB copper area under the exposed pad (if present) and thermal vias significantly improve heat dissipation. Avoid placing near high-power components; maintain ≥1 mm clearance from adjacent 1 A+ traces to prevent localized heating affecting offset drift.