Diodes Incorporated ZXCT215BDSJ-7

Overview

ZXCT215BDSJ-7 from Diodes Incorporated is a zero-drift, high-precision current-sense amplifier with 75V/V fixed gain, designed for bidirectional or unidirectional shunt-based current monitoring 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 - enabling accurate 10mV full-scale shunt measurements in server power supplies and battery management systems.

For engineers reviewing the ZXCT215BDSJ-7 datasheet, ZXCT215BDSJ-7 pinout, ZXCT215BDSJ-7 application, or ZXCT215BDSJ-7 equivalent, key selection criteria include its U-QFN1418-10 package, -40°C to +125°C operation, 2.7V–26V supply range, 75V/V gain, and support for both high-side and low-side sensing configurations with external REF biasing.

Technical Context

The device uses a zero-drift chopper-stabilized architecture to achieve 0.1–0.5μV/°C offset drift and 10ppm/°C max gain drift across -40°C to +125°C. Its input stage operates with -0.3V to 26V common-mode range independent of supply voltage, allowing measurement on rails far exceeding V+.

It features rail-to-rail output (VOL = GND + 5mV, VOH = V+ – 200mV), 40kHz bandwidth, 25nV/√Hz input voltage noise, and 100μA max quiescent current - optimized for low-power, high-accuracy current sensing in space-constrained industrial and computing applications.

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 high-precision current sensing applications.

Compared with ZXCT215BDSJ-7, INA240A1QDRQ1 offers superior offset but lacks common-mode flexibility above 5.5V, while MAX40056ATA+T provides higher speed but cannot operate directly on 24V rails - making ZXCT215BDSJ-7 optimal for cost-sensitive, wide-supply industrial current monitoring.

Availability

ZXCT215BDSJ-7 is available at Aetrix Electronics and suitable for server power monitoring, battery management systems, industrial PLC power supplies, and high-performance GPU power rail applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for ZXCT215BDSJ-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.

ZXCT21x belongs to Diodes' precision analog product line, engineered specifically for high-accuracy, low-loss current sensing in computing, telecom, and industrial power systems where wide common-mode range and temperature stability are critical.

FAQ

What is the maximum common-mode voltage the ZXCT215BDSJ-7 can measure?

The ZXCT215BDSJ-7 supports a common-mode input range of -0.3V to 26V, independent of its supply voltage. This allows direct high-side sensing on 24V rails even when powered from a 3.3V auxiliary supply, eliminating the need for level-shifting circuitry or isolated amplifiers in multi-rail systems.

Can ZXCT215BDSJ-7 be used for bidirectional current sensing?

Yes - by applying a mid-supply or system-reference voltage to the REF pin, the output swings symmetrically around that bias point, enabling accurate measurement of both charge and discharge currents. The device's rail-to-rail output and low offset ensure minimal dead zone and high resolution in each direction across the full temperature range.

What is the recommended shunt resistor value for a 10A full-scale measurement?

For 10A full-scale with 10mV shunt drop, use R_SHUNT = 1mΩ. With 75V/V gain, this yields 750mV output - well within ADC input ranges. At 10A, power dissipation is only 100mW, minimizing thermal drift and PCB heating effects compared to higher-drop alternatives.

Does ZXCT215BDSJ-7 require external filtering for EMI robustness?

Input filter resistors must be ≤10Ω to avoid degrading CMRR and gain accuracy; matching is critical. For noisy environments or shunts <1mΩ, a small capacitor (e.g., 0.01µF–0.1µF) may be added across matched RS resistors to suppress RF pickup without introducing significant phase lag or gain error.