Diodes Incorporated ZXCT211CDSJ-7

Overview

ZXCT211CDSJ-7 from Diodes Incorporated is a zero-drift, high-precision current-shunt monitor IC with 500V/V fixed gain, ±0.5% max gain error over temperature, ±30μV max input offset voltage, and rail-to-rail output swing. It operates from 2.7V to 26V supply, supports common-mode voltages from –0.3V to 26V, and enables accurate 10mV full-scale shunt measurements in high-side or low-side configurations for industrial power supplies and battery management systems.

For engineers reviewing the ZXCT211CDSJ-7 datasheet, ZXCT211CDSJ-7 pinout, ZXCT211CDSJ-7 application, or ZXCT211CDSJ-7 equivalent, key selection criteria include its C-grade precision (±0.5% gain error), U-QFN1418-10 package thermal performance (R_θJA = 115°C/W), –40°C to +125°C operation, and compatibility with 10mV shunt drops in high-common-mode, low-power-loss sensing circuits.

Technical Context

The ZXCT211CDSJ-7 implements a zero-drift chopper-stabilized amplifier 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 rejects common-mode signals up to 26V while operating from as low as 2.7V supply - enabling measurement of load currents on rails far exceeding V+.

It delivers rail-to-rail output voltage (V_OH = V+ – 0.05V, V_OL = GND + 5mV) into 10kΩ loads, supports bidirectional sensing via REF pin biasing, and maintains 95dB minimum CMRR across full temperature range. Input bias current remains below 35μA with minimal variation versus common-mode voltage.

Key Specifications

Pinout & Package

Package: U-QFN1418-10 (2.0mm × 1.8mm, 0.5mm pitch, exposed thermal pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1IDR and MAX40016AUB+, ZXCT211CDSJ-7 delivers superior 26V common-mode tolerance, tighter ±0.5% gain error, lower ±30μV offset, and smaller U-QFN1418-10 footprint - making it optimal for space-constrained, high-accuracy 24V+ industrial and telecom current sensing.

Availability

ZXCT211CDSJ-7 is available at Aetrix Electronics and suitable for server power rail monitoring, battery management systems, industrial PLC analog input modules, and telecom rectifier current sensing requiring stable component supply, long-term lifecycle assurance, and RoHS3-compliant sourcing.

Supply support for ZXCT211CDSJ-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, communications, and consumer markets.

ZXCT21x belongs to Diodes' precision analog sensing product line, engineered specifically for high-accuracy, low-loss current measurement in high-common-mode, wide-temperature industrial and infrastructure applications.

FAQ

What is the maximum shunt resistor voltage drop supported by ZXCT211CDSJ-7?

ZXCT211CDSJ-7 is optimized for 10mV full-scale shunt voltage drops, enabling high-accuracy current measurement with minimal I²R power loss. Its 500V/V gain converts this to a 5V output at full scale, compatible with standard 5V ADC references. The device maintains specified accuracy down to ±5mV input, supporting precise low-current detection.

Can ZXCT211CDSJ-7 perform bidirectional current sensing?

Yes - bidirectional sensing is achieved by applying a mid-supply or system-reference voltage (e.g., 1.65V for 3.3V systems) to the REF pin. This biases the OUT pin to that voltage, allowing positive and negative current-induced output swings relative to REF. The device's rail-to-rail output and low offset ensure symmetrical accuracy in both directions.

Does ZXCT211CDSJ-7 require external filtering for EMI immunity?

Input filtering is recommended in noisy environments: series resistors ≤10Ω and matching capacitors (e.g., 0.01–0.1μF) at IN+/IN– suppress RF interference and dampen shunt inductance resonance. Exceeding 10Ω introduces gain and CMRR errors due to input bias current mismatch; layout best practices emphasize short traces and local 100nF bypass at V+.

How does the U-QFN1418-10 package affect thermal performance?

The U-QFN1418-10 package provides R_θJA = 115°C/W (vs. 228°C/W for SOT363), significantly improving power dissipation capability. Its exposed thermal pad must be soldered to a PCB copper pour for effective heat transfer. This enables reliable operation at full 100μA I_Q across –40°C to +125°C ambient, critical for enclosed industrial enclosures.