Diodes Incorporated ZXCT212CDSJ-7

Overview

ZXCT212CDSJ-7 from Diodes Incorporated is a high-precision, zero-drift current-sense amplifier with 1000V/V fixed gain, ±0.5% max gain error over temperature, ±30μV 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 ZXCT212CDSJ-7 datasheet, ZXCT212CDSJ-7 pinout, ZXCT212CDSJ-7 application, or ZXCT212CDSJ-7 equivalent, this device supports low-shunt-drop (10mV full-scale) sensing, operates from 2.7V to 26V supply, delivers 4kHz bandwidth, and maintains 10ppm/°C gain drift across –40°C to +125°C - critical for precision instrumentation and automotive-grade power monitoring.

Technical Context

The ZXCT212CDSJ-7 implements a zero-drift chopper-stabilized architecture with post-trim calibration to achieve ±30μV max offset and 0.5μV/°C typical offset drift, enabling stable DC-coupled current measurement under thermal stress. Its differential input stage supports common-mode voltages from –0.3V to 26V independent of supply voltage.

It features rail-to-rail output drive into 10kΩ loads, 100μA max quiescent current, and integrated ESD protection (±5kV HBM), making it suitable for space-constrained, low-power, high-reliability applications where shunt-based sensing must coexist with noisy or high-voltage rails.

Key Specifications

Pinout & Package

Package: U-QFN1418-10 (2.0mm × 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 INA240A1QDRQ1 and MAX40056ATA+T, ZXCT212CDSJ-7 uniquely combines 1000V/V fixed gain, 26V common-mode tolerance, and ±30μV offset in a 2mm × 1.8mm package - offering superior DC accuracy and high-voltage simplicity for industrial and computing power monitoring without design compromises.

Availability

ZXCT212CDSJ-7 is available at Aetrix Electronics and suitable for battery management systems, industrial 24V power supplies, and server rack PDUs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for ZXCT212CDSJ-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.

ZXCT21x belongs to Diodes' precision analog sensing portfolio, engineered specifically for high-accuracy, low-power current monitoring in harsh thermal and electrical environments - targeting industrial, computing, and energy infrastructure markets.

FAQ

What is the maximum common-mode voltage the ZXCT212CDSJ-7 can handle?

The ZXCT212CDSJ-7 supports a common-mode input voltage range of –0.3V to 26V, independent of its supply voltage (2.7V to 26V). This allows direct high-side sensing on 24V rails without external level-shifting circuitry, and accommodates negative transients down to –0.3V relative to GND.

Can ZXCT212CDSJ-7 be used for bidirectional current sensing?

Yes - by applying a bias voltage (e.g., V+/2) to the REF pin, the output swings symmetrically around that reference, enabling measurement of current flow in both directions. This configuration is validated in the datasheet for battery charge/discharge monitoring and requires low-impedance REF drive.

What is the purpose of the NC pins (1 and 7) in the U-QFN1418-10 package?

Pins 1 and 7 are not internally connected. They may be left floating or tied to GND to improve mechanical stability during reflow and enhance thermal dissipation. Neither pin carries signal or power; grounding them does not affect electrical performance but aids manufacturability and board-level reliability.

How does the zero-drift architecture improve long-term measurement stability?

The zero-drift chopper-stabilized design actively corrects input offset voltage in real time, limiting drift to ±0.5μV/°C and ensuring <±30μV total offset over –40°C to +125°C. This eliminates baseline walkover time and temperature, critical for applications like energy metering or battery coulomb counting where accumulated error directly impacts system accuracy.