Diodes Incorporated ZXCT214BDSJ-7

Overview

ZXCT214BDSJ-7 from Diodes Incorporated is a zero-drift, high-precision current-sense amplifier with 100V/V fixed gain, -0.3V to 26V common-mode input range, ±60μV max offset voltage over temperature, and rail-to-rail output swing - designed for accurate bidirectional or unidirectional current monitoring in industrial power supplies and battery management systems.

For engineers reviewing the ZXCT214BDSJ-7 datasheet, ZXCT214BDSJ-7 pinout, ZXCT214BDSJ-7 application, or ZXCT214BDSJ-7 equivalent, this device supports 10mV full-scale shunt sensing, operates from 2.7V to 26V supply, delivers <0.8% gain error over -40°C to +125°C, and integrates low-drift architecture for stable performance in high-common-mode, high-accuracy measurement circuits.

Technical Context

The ZXCT214BDSJ-7 implements a zero-drift chopper-stabilized amplifier topology with post-trim calibration to achieve ±60μV max input offset voltage and 10ppm/°C max gain drift across -40°C to +125°C. Its differential input stage rejects common-mode voltages up to 26V while operating from a supply as low as 2.7V.

It features rail-to-rail output drive capability (within 50mV of V+ and 5mV of GND), 30kHz bandwidth at 10pF load, and supports both high-side and low-side shunt configurations via configurable REF pin biasing - enabling precise current measurement without requiring supply voltage to exceed common-mode rail.

Key Specifications

Pinout & Package

ZXCT214BDSJ-7 is housed in a 10-pin U-QFN1418-10 package (1.4mm × 1.8mm, 0.5mm pitch, exposed thermal pad) optimized for space-constrained PCB layouts and thermal performance (R_θJA = 115°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1IDR, ZXCT214BDSJ-7 offers superior common-mode rejection (95dB vs. 85dB) and smaller footprint, but lower gain; versus ZXCT214ADSJ-7, it provides tighter offset and gain error specs across temperature - critical for field-deployed equipment requiring long-term calibration stability.

Availability

ZXCT214BDSJ-7 is available at Aetrix Electronics and suitable for industrial power supplies, battery management systems, telecom rectifier modules, and high-performance video cards requiring stable component supply with guaranteed long-term availability.

Supply support for ZXCT214BDSJ-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 protection applications.

The ZXCT21x series is part of Diodes' precision analog portfolio, engineered specifically for high-accuracy, wide common-mode current sensing in industrial, computing, and telecom infrastructure where low power, small size, and temperature stability are critical.

FAQ

What is the maximum common-mode voltage the ZXCT214BDSJ-7 can handle?

The ZXCT214BDSJ-7 supports a common-mode input range from -0.3V to 26V, enabling reliable high-side current sensing on 24V industrial rails while powered from a lower 3.3V or 5V supply. This specification is guaranteed over the full -40°C to +125°C operating temperature range and does not require external level-shifting circuitry.

Can the ZXCT214BDSJ-7 be used for bidirectional current sensing?

Yes - by applying a bias voltage (typically V+/2) to the REF pin, the output swings symmetrically around that reference, allowing measurement of current flow in both directions. The rail-to-rail output stage ensures full utilization of ADC input range, and the zero-drift architecture maintains accuracy across temperature for charge/discharge asymmetry detection in battery systems.

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

Pin 1 and Pin 7 of the U-QFN1418-10 package are marked NC (No Connect) and are not internally bonded. They may be left floating or tied to GND for mechanical stability and improved thermal conduction through the exposed pad. Neither pin carries electrical functionality, and connecting them to any voltage rail other than GND is unnecessary and unsupported.

How does the 10mV full-scale shunt capability improve system efficiency?

By accurately resolving 10mV across the shunt resistor, the ZXCT214BDSJ-7 enables use of lower-resistance shunts (e.g., 100μΩ instead of 500μΩ), reducing I²R power loss by up to 75% at 100A. This directly improves thermal management, extends battery runtime, and lowers cooling requirements in high-current applications like server PSUs and EV chargers.