Diodes Incorporated ZXCT210CDSJ-7

Overview

ZXCT210CDSJ-7 from Diodes Incorporated is a zero-drift, high-precision current-sense amplifier with 200V/V fixed gain, designed for accurate bidirectional or unidirectional current monitoring across shunt resistors at common-mode voltages up to 26V. It delivers ±0.5% max gain error over temperature, ±30μV max input offset voltage, and rail-to-rail output swing while operating from 2.7V–26V supply with ≤100μA quiescent current. Used in battery management systems and industrial power supplies where low-power, high-accuracy sensing is critical.

For engineers reviewing the ZXCT210CDSJ-7 datasheet, ZXCT210CDSJ-7 pinout, ZXCT210CDSJ-7 application, or ZXCT210CDSJ-7 equivalent, key selection criteria include its 200V/V gain, ±0.5% gain error (C-grade), -0.3V to 26V common-mode range, U-QFN1418-10 package, and support for 10mV full-scale shunt drops in high-side/low-side configurations.

Technical Context

This device implements a zero-drift chopper-stabilized architecture with post-trim calibration to achieve <0.5μV/°C offset drift and 10ppm/°C gain drift across -40°C to +125°C. Its differential input stage operates with 120dB CMRR and supports true high-side sensing even when common-mode voltage exceeds supply voltage.

The rail-to-rail output drives ADC inputs directly, with 14kHz bandwidth (ZXCT210) and 0.4V/μs slew rate. Input bias currents remain below 35μA across full common-mode range, enabling stable operation with minimal external filtering.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZXCT210CDSJ-7, INA240A1QDRQ1 offers automotive qualification but doubles supply current and requires external components, while MAX40056ATA+T provides higher bandwidth but sacrifices 26V common-mode capability and precision-making ZXCT210CDSJ-7 optimal for industrial 24V systems needing ultra-low power and guaranteed C-grade accuracy.

Availability

ZXCT210CDSJ-7 is available at Aetrix Electronics and suitable for battery management systems, industrial power supplies, server rack telemetry, and high-performance GPU power monitoring requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for ZXCT210CDSJ-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 industrial, computing, and communications markets.

The ZXCT21x series was developed specifically for high-accuracy, low-power current sensing in harsh thermal environments, targeting applications where shunt-based measurement must maintain sub-0.5% error across -40°C to +125°C without recalibration.

FAQ

What is the maximum common-mode voltage the ZXCT210CDSJ-7 can measure?

The ZXCT210CDSJ-7 supports a common-mode input range of -0.3V to 26V, enabling high-side current sensing on 24V industrial rails while powered from a lower 3.3V or 5V supply. This specification is guaranteed across the full -40°C to +125°C operating temperature range and does not require derating at elevated temperatures.

How does the C-grade version differ from A or B versions?

The C-grade version guarantees ±0.5% maximum gain error and ±30μV maximum input offset voltage over temperature, versus ±0.8% and ±35μV for A/B grades. This is achieved through tighter post-trim calibration and is documented in the DS45449 Rev. 3 datasheet Table on page 3. No other electrical parameters differ between grades.

Can ZXCT210CDSJ-7 be used for bidirectional current sensing?

Yes - bidirectional operation is supported by applying a mid-supply reference voltage (e.g., V+/2) to the REF pin, causing the OUT pin to swing above and below that reference in proportion to current direction. The device's rail-to-rail output and 10mV full-scale sensitivity enable precise zero-crossing detection down to ±5mA with a 100mΩ shunt.

What package thermal characteristics apply to the U-QFN1418-10 variant?

The U-QFN1418-10 package has a junction-to-ambient thermal resistance (RθJA) of 115°C/W and junction-to-case (RθJC) of 50°C/W, measured per JEDEC 51-7 on a 4-layer board. These values assume proper PCB copper pour under the exposed pad and are critical for maintaining <125°C junction temperature at 100μA quiescent current in sealed enclosures.