Diodes Incorporated ZXCT214ADSJ-7

Overview

ZXCT214ADSJ-7 from Diodes Incorporated is a zero-drift, high-precision current-sense amplifier with 100V/V fixed gain, designed for unidirectional or bidirectional current monitoring across shunt resistors at common-mode voltages up to 26V. It delivers ±60μV max input offset voltage, ±0.8% max gain error over temperature, and rail-to-rail output swing while operating from 2.7V to 26V supply. Used in server power rails and battery management systems for accurate real-time load current feedback to ADCs.

For engineers reviewing the ZXCT214ADSJ-7 datasheet, ZXCT214ADSJ-7 pinout, ZXCT214ADSJ-7 application, or ZXCT214ADSJ-7 equivalent, key selection criteria include its 100V/V gain, -0.3V to 26V common-mode range, 100μA max quiescent current, SOT363/U-QFN1418-10 package options, and compatibility with low-side/high-side sensing topologies requiring sub-10mV full-scale shunt drops.

Technical Context

The ZXCT214ADSJ-7 implements a zero-drift chopper-stabilized architecture with post-trim calibration to achieve ±60μV max VOS and 10ppm/°C max gain drift across -40°C to +125°C. Its differential input stage supports common-mode voltages extending 0.3V below ground and up to 26V - exceeding its own 2.7V–26V supply range - enabling direct high-side sensing on 24V bus rails without level-shifting.

It features rail-to-rail output capable of sourcing/sinking ≥2mA while maintaining ±0.05V swing margin to supply rails, and integrates internal gain-setting resistors for fixed 100V/V amplification. The REF pin accepts an external bias voltage (0V to V+) to support bidirectional current measurement with centered output swing.

Key Specifications

Pinout & Package

Package: U-QFN1418-10 (1.4mm × 1.8mm, 0.5mm pitch, wettable flank). Exposed thermal pad improves thermal resistance (R_θJA = 115°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-sense amplifier applications.

Compared with INA240A1QDRQ1 and MAX40016AUB+, the ZXCT214ADSJ-7 uniquely balances 100V/V gain, 100μA IQ, and 26V common-mode in a 1.4×1.8mm U-QFN - making it optimal for space-constrained, always-on industrial and computing current monitoring where automotive qualification is unnecessary.

Availability

ZXCT214ADSJ-7 is available at Aetrix Electronics and suitable for server power rail monitoring, battery management systems, industrial PLC I/O modules, and high-performance GPU power delivery requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for ZXCT214ADSJ-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 manufacturer 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-power current sensing in computing, industrial, and telecom infrastructure where shunt-based measurement must coexist with wide common-mode voltage ranges and extended temperature operation.

FAQ

What is the maximum common-mode voltage the ZXCT214ADSJ-7 can handle?

The ZXCT214ADSJ-7 supports a common-mode input range of -0.3V to 26V, meaning it can accurately measure current through a shunt resistor placed on voltage rails as high as 24V while powered from a lower supply (e.g., 3.3V or 5V). This capability is enabled by its proprietary input stage architecture and is validated across the full -40°C to +125°C operating temperature range.

Can the ZXCT214ADSJ-7 be used for bidirectional current sensing?

Yes - by applying a mid-supply voltage (e.g., V+/2) to the REF pin, the OUT pin produces a bipolar output centered at that reference, enabling distinction between charge and discharge currents. The device's rail-to-rail output swing and low offset ensure symmetrical positive/negative response, and the REF pin's 0V to V+ input range allows flexible biasing for different ADC reference schemes.

What is the purpose of the NC pins on the U-QFN1418-10 package?

Pins 1 and 10 of the U-QFN1418-10 package are no-connect (NC) terminals - they are not bonded to the die and serve no electrical function. Diodes Incorporated recommends leaving them floating; however, connecting them to GND is acceptable and may improve mechanical stability or EMI performance in some PCB layouts, provided no unintended shorting occurs.

How does the zero-drift architecture improve measurement accuracy?

The zero-drift chopper-stabilized design actively cancels input offset voltage and its drift over time and temperature. Measured data shows ±60μV max offset and ≤0.5μV/°C drift across -40°C to +125°C - enabling stable 10mV full-scale shunt measurements without periodic recalibration. This eliminates the dominant error source in precision current sensing, especially critical in systems with wide thermal excursions.