Diodes Incorporated ZXCT211ADW-7

Overview

ZXCT211ADW-7 from Diodes Incorporated is a zero-drift, high-precision current-shunt monitor IC with 500V/V fixed gain, designed for accurate bidirectional or unidirectional current sensing in high-common-mode voltage systems up to 26V. It achieves ±0.8% max gain error over temperature, ±35µV max input offset voltage, and supports 10mV full-scale shunt drops-enabling low-power-loss, high-accuracy measurement in server power supplies and battery management systems.

For engineers reviewing the ZXCT211ADW-7 datasheet, ZXCT211ADW-7 pinout, ZXCT211ADW-7 application, or ZXCT211ADW-7 equivalent, key selection criteria include its -0.3V to 26V common-mode range, rail-to-rail output swing, 100µA max quiescent current, and SOT363 package compatibility with space-constrained PCB layouts.

Technical Context

The ZXCT211ADW-7 employs a zero-drift chopper-stabilized architecture with post-trim calibration to maintain ±0.5µV/°C typical offset drift across -40°C to +125°C. Its differential input stage rejects common-mode voltages far exceeding the 2.7V–26V supply rail, enabling direct sensing on 24V bus rails while powered from 3.3V.

It delivers rail-to-rail output voltage (VOUT = GAIN × VSENSE + VREF) with 7kHz bandwidth and 0.4V/µs slew rate, supporting ADC interfacing without external level-shifting. The REF pin allows flexible biasing for bidirectional operation, and internal ESD protection meets ±5kV HBM.

Key Specifications

Pinout & Package

Package: SOT363 (6-pin, 2.1mm × 2.0mm × 1.1mm, moisture sensitivity level 1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1IDR and MAX40056ATA+T, the ZXCT211ADW-7 uniquely balances 26V common-mode tolerance, ultra-low IQ, and industrial temperature stability-making it optimal for space- and power-constrained 24V embedded systems requiring long-term calibration integrity.

Availability

ZXCT211ADW-7 is available at Aetrix Electronics and suitable for server power supplies, battery management systems, industrial PLC modules, and GPU VRM monitoring requiring stable component supply across extended temperature and lifecycle demands.

Supply support for ZXCT211ADW-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 power management, signal integrity, and connectivity applications.

The ZXCT21x series was developed specifically for high-accuracy, low-loss current sensing in industrial, computing, and energy storage systems operating across harsh temperature and high-common-mode voltage conditions.

FAQ

What is the maximum common-mode voltage the ZXCT211ADW-7 can withstand?

The ZXCT211ADW-7 supports a common-mode input voltage range of -0.3V to 26V, verified per Absolute Maximum Ratings and Recommended Operating Conditions. This allows direct high-side sensing on 24V bus rails even when powered from a lower 3.3V or 5V supply, with no external level-shifting components required.

Can the ZXCT211ADW-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 bidirectional current detection. The device's rail-to-rail output and low offset voltage (±35µV max) ensure accurate resolution of both charge and discharge currents down to milliamp levels in battery applications.

Is external filtering required on the IN+ and IN− pins?

Input filtering is recommended only in noisy or high-dV/dt environments. If used, series resistors must be ≤10Ω to avoid degrading CMRR and gain accuracy; capacitors should match the shunt's L/R time constant. The datasheet provides RC design equations and warns against mismatched resistors causing >0.6% gain error.

What is the thermal performance of the SOT363 package?

The SOT363 package has a junction-to-ambient thermal resistance (RθJA) of 228°C/W per JEDEC 51-7 test board. At 100µA IQ and 26V V+, power dissipation remains under 2.6mW, resulting in negligible self-heating (<0.6°C rise)-ensuring offset and gain stability without heatsinking in typical applications.