Diodes Incorporated ZXCT214CDW-7

Overview

ZXCT214CDW-7 from Diodes Incorporated is a zero-drift, high-precision current-sense amplifier with 100V/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-voltage systems up to 26V, such as battery management and industrial power supplies.

For engineers reviewing the ZXCT214CDW-7 datasheet, ZXCT214CDW-7 pinout, ZXCT214CDW-7 application, or ZXCT214CDW-7 equivalent, key selection criteria include its 100V/V gain accuracy at ±0.5%, -0.3V to 26V common-mode input range, 100μA max quiescent current, and SOT363 package compatibility with space-constrained PCB layouts.

Technical Context

The ZXCT214CDW-7 employs a zero-drift chopper-stabilized architecture to achieve ±60μV max input offset voltage and 10ppm/°C max gain drift across -40°C to +125°C. Its differential input stage supports shunt voltage sensing down to 10mV full-scale while rejecting common-mode voltages up to 26V - enabling high-side current measurement even when V_IN+ exceeds V₊.

It features rail-to-rail output drive into 10kΩ loads, 30kHz bandwidth (C_L = 10pF), and operates from a single 2.7V–26V supply. The REF pin allows external biasing for bidirectional current sensing, and internal post-trim calibration ensures guaranteed gain error ≤±0.5% over full temperature range.

Key Specifications

Pinout & Package

SOT363 (6-pin) package with 1.3mm × 2.1mm footprint, 0.95mm height, and thermal resistance R_θJA = 228°C/W - optimized for compact, thermally constrained current-sensing nodes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1QDRQ1 and MAX4080TASA+, the ZXCT214CDW-7 offers superior offset performance (±60μV vs. ±100–150μV) and higher CMRR (≥120dB vs. 85–120dB) in a smaller SOT363 package, making it optimal for space-constrained, high-accuracy industrial and computing current sensing where automotive qualification is unnecessary.

Availability

ZXCT214CDW-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 support, and RoHS-compliant sourcing.

Supply support for ZXCT214CDW-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 ICs for power management, signal integrity, and connectivity applications.

The ZXCT21x series belongs to Diodes' precision analog portfolio, engineered specifically for high-accuracy, low-drift current sensing in industrial, computing, and telecom infrastructure where reliability across extended temperature ranges is critical.

FAQ

What is the maximum common-mode voltage the ZXCT214CDW-7 can handle?

The ZXCT214CDW-7 supports a common-mode input voltage range of -0.3V to 26V. This allows direct high-side current sensing on 24V bus rails while operating from a lower supply voltage (e.g., 3.3V or 5V), eliminating the need for level-shifting circuitry or isolated supplies in many industrial and computing applications.

Can the ZXCT214CDW-7 measure bidirectional current?

Yes - by applying a bias voltage (e.g., V+/2) to the REF pin, the output swings symmetrically around that reference, enabling measurement of both charging and discharging currents. This configuration is used in battery management systems and motor control feedback loops where current direction must be determined with high accuracy.

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

For 10A full-scale with 10mV shunt drop (optimized for minimal power loss), use a 1mΩ shunt. With 100V/V gain, V_OUT = 10A × 0.001Ω × 100 = 1.0V - ideal for direct interface with a 3.3V or 5V ADC's 0–1V input range. Lower shunt values reduce self-heating but require careful PCB layout to minimize parasitic resistance.

Does the ZXCT214CDW-7 require external compensation components?

No external compensation is required for stability under standard conditions. However, if input filtering is needed for noisy environments or shunt inductance mitigation, resistors ≤10Ω and matched capacitors may be added - but exceeding 10Ω introduces measurable gain error due to input bias current mismatch, as quantified in the datasheet's error calculation tables.