Diodes Incorporated ZXCT211ADSJ-7

Overview

ZXCT211ADSJ-7 from Diodes Incorporated is a zero-drift, high-precision current-shunt monitor IC with 500 V/V fixed gain, designed for accurate bidirectional or unidirectional current sensing across shunt resistors at common-mode voltages up to 26 V. It delivers ±30 µV max input offset voltage, ±0.8% max gain error over temperature, and rail-to-rail output swing while operating from 2.7 V to 26 V supply. Used in battery management systems for real-time charge/discharge monitoring.

For engineers reviewing the ZXCT211ADSJ-7 datasheet, ZXCT211ADSJ-7 pinout, ZXCT211ADSJ-7 application, or ZXCT211ADSJ-7 equivalent, this device supports low-side and high-side configurations with 10 mV full-scale shunt drop capability, 7 kHz bandwidth, and 100 µA max quiescent current - critical for power-constrained industrial and computing current-sensing designs.

Technical Context

The ZXCT211ADSJ-7 implements a zero-drift chopper-stabilized amplifier architecture with post-trim calibration to maintain ±30 µV offset and 10 ppm/°C gain drift across –40°C to +125°C. Its differential input stage operates with –0.3 V to 26 V common-mode range independent of supply voltage, enabling direct sensing on 24 V rails while powered from 3.3 V.

It features rail-to-rail output capable of driving 10 kΩ loads within 50 mV of supply rails, supports external REF biasing for bidirectional operation, and includes internal ESD protection (±5 kV HBM). The U-QFN1418-10 package provides low thermal resistance (R_θJA = 115 °C/W) for stable performance under sustained load conditions.

Key Specifications

Pinout & Package

Package: U-QFN1418-10 (1.4 mm × 1.8 mm, 0.5 mm pitch, 10-pin, 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 MAX40086AUT#T, ZXCT211ADSJ-7 uniquely balances 26 V common-mode tolerance, 500 V/V gain, ±30 µV offset, and 100 µA I_Q - making it optimal for space-constrained, wide-rail, low-power BMS and server power monitoring where long-term drift and supply headroom are critical.

Availability

ZXCT211ADSJ-7 is available at Aetrix Electronics and suitable for battery management systems, industrial power supplies, server rack PDUs, and GPU power rail sensing requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.

Supply support for ZXCT211ADSJ-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 devices, with emphasis on high-reliability, energy-efficient solutions for industrial, computing, and automotive markets.

ZXCT21x belongs to Diodes' precision analog sensing product line, engineered specifically for high-accuracy, low-loss current monitoring in power-constrained and wide-common-mode applications such as BMS, telecom rectifiers, and server power distribution.

FAQ

What is the maximum common-mode voltage the ZXCT211ADSJ-7 can handle?

The ZXCT211ADSJ-7 supports a common-mode input voltage range of –0.3 V to 26 V, verified per Absolute Maximum Ratings and Recommended Operating Conditions in DS45449 Rev. 3–2. This allows direct sensing on 24 V rails even when powered from a lower supply (e.g., 3.3 V), eliminating need for level-shifting or isolated amplifiers in high-side configurations.

Can the ZXCT211ADSJ-7 measure bidirectional current?

Yes - bidirectional sensing is enabled by applying a bias voltage (typically 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 matched input stage support symmetric positive/negative current reporting, as confirmed in Figure 20 and Application Information section of DS45449.

What is the thermal performance of the U-QFN1418-10 package?

The U-QFN1418-10 package has R_θJA = 115 °C/W and R_θJC = 50 °C/W (per JEDEC 51-7 test board), enabling reliable operation at full rated current up to +125°C ambient. The exposed thermal pad must be soldered to a dedicated PCB copper pour for effective heat dissipation, as specified in Thermal Information section of DS45449.

How does the zero-drift architecture improve measurement accuracy?

The zero-drift chopper-stabilized design reduces input offset voltage to ±30 µV max and limits offset drift to 0.5 µV/°C across –40°C to +125°C. This eliminates baseline error accumulation in long-duration measurements (e.g., battery coulomb counting), directly improving current integration accuracy versus conventional amplifiers with >1 µV/°C drift.