Diodes Incorporated ZXCT215CDSJ-7

Overview

ZXCT215CDSJ-7 from Diodes Incorporated is a zero-drift, high-precision current-sense amplifier with 75V/V fixed gain, ±0.5% max gain error over temperature, ±60μV max input offset voltage, and rail-to-rail output swing - designed for accurate bidirectional or unidirectional current monitoring in high-common-mode industrial power supplies and battery management systems.

For engineers reviewing the ZXCT215CDSJ-7 datasheet, ZXCT215CDSJ-7 pinout, ZXCT215CDSJ-7 application, or ZXCT215CDSJ-7 equivalent, key selection criteria include its 75V/V gain, -0.3V to 26V common-mode range, 2.7V–26V supply operation, 100μA max quiescent current, and U-QFN1418-10 package compatibility with space-constrained PCB layouts.

Technical Context

The device employs a zero-drift chopper-stabilized architecture enabling <0.5μV/°C offset drift and <10ppm/°C gain drift across -40°C to +125°C. Its differential input stage supports both high-side and low-side shunt configurations without external level-shifting circuitry.

It features a dedicated REF pin for biasing the output midpoint in bidirectional sensing applications, and its rail-to-rail output drives ADC inputs directly while maintaining ±0.01% nonlinearity error over full-scale 10mV shunt drops.

Key Specifications

Pinout & Package

Package: U-QFN1418-10 (1.4mm × 1.8mm, 0.5mm pitch, wettable flank).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1QDRQ1, ZXCT215CDSJ-7 offers tighter gain error (±0.5% vs ±1.0%) and smaller U-QFN package but lacks AEC-Q100 certification; versus ZXCT214CDSJ-7, it provides lower gain for extended current range while maintaining identical offset and thermal stability.

Availability

ZXCT215CDSJ-7 is available at Aetrix Electronics and suitable for industrial power supplies, battery management systems, server PDUs, and high-performance GPU power delivery requiring stable component supply across extended temperature and long product lifecycles.

Supply support for ZXCT215CDSJ-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, computing, and communications markets.

ZXCT21x belongs to Diodes' precision analog sensing portfolio, engineered specifically for high-accuracy, low-power current monitoring in harsh thermal environments and wide common-mode voltage applications.

FAQ

What is the maximum common-mode voltage the ZXCT215CDSJ-7 can tolerate?

The ZXCT215CDSJ-7 supports a common-mode input range from -0.3V to 26V, meaning it can accurately sense current across shunt resistors placed on voltage rails up to 26V - including 24V industrial buses - while operating from a lower supply such as 3.3V or 5V. This eliminates the need for external level-shifting circuitry in high-side configurations.

How does the REF pin function in bidirectional current sensing?

In bidirectional sensing, the REF pin sets the output's DC bias point - typically tied to V+/2 - so that positive load current produces an output above V+/2 and negative (reverse) current produces an output below V+/2. The device requires a low-impedance REF source; exceeding the absolute maximum rating (GND – 0.3V to V+ + 0.3V) risks latch-up or permanent damage.

Can ZXCT215CDSJ-7 operate from a 3.3V supply while measuring current on a 24V rail?

Yes - the device's supply voltage range is 2.7V to 26V, and its common-mode input range (-0.3V to 26V) is independent of V+. When powered from 3.3V, it can still measure current across a shunt on a 24V rail because the internal topology isolates input stage biasing from supply rails. Output remains rail-to-rail relative to the 3.3V supply.

What is the impact of adding series resistors at IN+ and IN− pins?

Adding >10Ω series resistors degrades CMRR, increases gain error, and introduces offset voltage due to input bias current mismatch. For ZXCT215CDSJ-7, the datasheet specifies ≤10Ω to limit gain error to <0.44% and preserve <95dB CMRR. Higher values also reduce bandwidth and increase susceptibility to noise coupling.