Diodes Incorporated ZXCT212CDW-7

Overview

ZXCT212CDW-7 from Diodes Incorporated is a zero-drift, high-precision 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 (–0.3V to 26V), low-power (100μA max IQ) applications such as battery management systems and industrial power supplies.

For engineers reviewing the ZXCT212CDW-7 datasheet, ZXCT212CDW-7 pinout, ZXCT212CDW-7 application, or ZXCT212CDW-7 equivalent, key selection criteria include its 1000V/V gain accuracy at ±0.5%, 10mV full-scale shunt compatibility, –40°C to +125°C operation, SOT363 package footprint, and zero-drift architecture enabling stable measurement under thermal stress.

Technical Context

The ZXCT212CDW-7 implements a precision zero-drift chopper-stabilized amplifier topology to suppress input offset drift (≤0.5μV/°C) and maintain gain stability (≤10ppm/°C) across –40°C to +125°C. Its differential input stage supports common-mode voltages up to 26V while operating from a 2.7V–26V single supply.

It delivers rail-to-rail output swing (within 50mV of V+ and 5mV of GND) into 10kΩ loads, features 100dB min CMRR, and integrates internal gain-setting resistors for fixed 1000V/V amplification - eliminating external resistor matching errors and enabling direct connection to ADCs without signal conditioning.

Key Specifications

Pinout & Package

SOT363 (6-pin, 2.1mm × 2.0mm × 1.1mm) surface-mount package with exposed pad for thermal performance. Pin 1 = REF, Pin 2 = GND, Pin 3 = V+, Pin 4 = IN+, Pin 5 = IN–, Pin 6 = OUT.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-gain, zero-drift current sensing applications.

Compared with INA240A1IDR and MAX4080TASA+, ZXCT212CDW-7 offers superior gain accuracy (±0.5%) and lower offset (±30μV) in a compact SOT363 package - making it optimal for space-constrained, thermally demanding applications where 10mV shunt resolution and minimal calibration are critical.

Availability

ZXCT212CDW-7 is available at Aetrix Electronics and suitable for battery management systems, industrial power supply monitoring, server rack PDUs, and high-performance GPU power rail sensing requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for ZXCT212CDW-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 protection applications - with manufacturing and quality systems certified to ISO 9001, IATF 16949, and ISO 14001 standards.

The ZXCT21x product line targets precision current sensing in high-common-mode, low-power environments - specifically engineered for battery, server, telecom, and industrial systems where accuracy, thermal stability, and small-footprint integration are essential.

FAQ

What is the maximum common-mode voltage the ZXCT212CDW-7 can handle?

The ZXCT212CDW-7 supports a common-mode input voltage range of –0.3V to 26V. This allows high-side sensing on 24V rails while operating from a lower supply (e.g., 3.3V or 5V). Exceeding 26V may damage the device, and operation below –0.3V risks violating absolute maximum ratings for IN+ and IN– pins.

Can the ZXCT212CDW-7 measure bidirectional current?

Yes - bidirectional sensing is enabled by applying a bias voltage (typically V+/2) to the REF pin. The output then swings symmetrically around this reference, producing positive voltages for one current direction and negative relative to REF for the reverse. A low-impedance REF source is mandatory to prevent gain/offset errors.

Does the ZXCT212CDW-7 require external gain-setting resistors?

No - the ZXCT212CDW-7 integrates precision thin-film resistors to achieve its fixed 1000V/V gain. This eliminates external component count, matching errors, and board space, while ensuring guaranteed gain accuracy (±0.5%) across temperature without trimming or calibration.

What is the recommended PCB layout practice for minimizing noise?

Place 100nF ceramic bypass capacitors between V+ and GND within 2mm of pins 2 and 3; route IN+ and IN– traces as matched-length, tightly coupled differential pairs; keep REF trace short and low-impedance; avoid routing noisy digital signals near analog input paths; and connect the SOT363 exposed pad to a solid ground plane for thermal and noise control.