Diodes Incorporated ZXCT212ADW-7

Overview

ZXCT212ADW-7 from Diodes Incorporated is a zero-drift, high-precision current-shunt monitor IC with 1000V/V fixed gain, designed for accurate high-side or low-side current sensing across -0.3V to 26V common-mode voltage range. It delivers ±30μV max offset voltage, ±0.8% max gain error over temperature, and rail-to-rail output swing while operating from 2.7V–26V supply at ≤100μA quiescent current. Used in server power rails and battery management systems where 10mV shunt drop accuracy is critical.

For engineers reviewing the ZXCT212ADW-7 datasheet, ZXCT212ADW-7 pinout, ZXCT212ADW-7 application, or ZXCT212ADW-7 equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, application-specific implementation guidance, and confirmed alternative parts with quantified functional differences.

Technical Context

The ZXCT212ADW-7 employs a zero-drift chopper-stabilized amplifier architecture with post-trim calibration to achieve ±30μV max input offset and 10ppm/°C max gain drift over -40°C to +125°C. Its differential input stage supports bidirectional sensing when biased via the REF pin and maintains 100dB+ CMRR across full common-mode range.

It features rail-to-rail output capable of driving 10kΩ loads within 50mV of supply rails, operates with 4kHz bandwidth (C_L=10pF), and integrates internal gain-setting resistors for fixed 1000V/V amplification-eliminating external resistor matching errors and enabling direct ADC interfacing.

Key Specifications

Pinout & Package

SOT363-6 package: 2.1mm × 2.0mm × 1.0mm body, 0.95mm pitch, thermally enhanced die pad (pin 2 connected to GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1QDRQ1 and MAX40056AUT+T, ZXCT212ADW-7 uniquely balances 1000V/V gain, 26V common-mode capability, and ultra-low offset in a cost-optimized SOT363 package-making it optimal for industrial and computing applications where supply voltage exceeds 5.5V and automotive qualification is unnecessary.

Availability

ZXCT212ADW-7 is available at Aetrix Electronics and suitable for server power monitoring, battery management systems, industrial PLC analog modules, and GPU power delivery requiring stable component supply across extended temperature and voltage ranges.

Supply support for ZXCT212ADW-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The ZXCT21x series targets precision current sensing in high-reliability industrial, computing, and telecom infrastructure-designed to replace legacy op-amp-based solutions with integrated zero-drift performance and simplified layout.

FAQ

What is the maximum common-mode voltage the ZXCT212ADW-7 can measure?

The ZXCT212ADW-7 supports a common-mode input voltage range of -0.3V to 26V. This allows direct sensing on 24V industrial buses or battery strings without external level-shifting components. The specification is guaranteed over the full -40°C to +125°C operating temperature range and applies to both IN+ and IN– pins simultaneously.

Can the ZXCT212ADW-7 be used for bidirectional current sensing?

Yes, the ZXCT212ADW-7 supports bidirectional sensing by applying a bias voltage to the REF pin-typically V+/2-to center the output swing. When current flows in either direction across the shunt, the OUT pin produces a voltage above or below the REF level. The device maintains ±30μV offset and 1000V/V gain in both directions, enabling accurate charge/discharge measurement in battery systems.

What is the recommended PCB layout practice for minimizing offset error?

To minimize offset error, route IN+ and IN– traces symmetrically with matched length and impedance, place the device within 2mm of the shunt resistor, and avoid routing noisy signals (e.g., switching node traces) near these inputs. Use a solid ground plane beneath the device and connect the thermal pad (pin 2) directly to GND with ≥4 vias to stabilize thermal drift and reduce noise coupling.

Does the ZXCT212ADW-7 require external gain-setting resistors?

No, the ZXCT212ADW-7 integrates precision laser-trimmed gain resistors for its fixed 1000V/V amplification ratio. This eliminates external component count, matching errors, and board space-unlike general-purpose op-amps. The internal resistor network is calibrated during post-trim manufacturing to ensure ±0.8% gain error across temperature without user adjustment.