Diodes Incorporated ZMC10D

Overview

ZMC10D from Zetex Semiconductors is a galvanically isolated current sensor IC using dual magnetoresistive thin-film permalloy elements to measure DC or AC current up to 10 A through an internal conductor, with 12 V supply, 3.9 mV/A typical open-circuit sensitivity, and 100 kHz bandwidth, deployed in motor drive current feedback loops.

For engineers reviewing the ZMC10D datasheet, ZMC10D pinout, ZMC10D application, or ZMC10D equivalent, key selection criteria include isolation voltage rating (2000 V DC), conductor resistance (0.7 mΩ), offset voltage stability (±19 mV), nonlinearity error (|6|% at 1–2 A), and thermal drift of sensitivity (−0.12 %/K).

Technical Context

The ZMC10D integrates two matched magnetoresistive bridge sensors on a single die, sensing magnetic flux generated by current flowing between pins 7–9 and 10–12. Its constant-current bridge supply (13 mA typ.) enables stable sensitivity across temperature (−25 °C to +100 °C operating range).

Galvanic isolation is achieved via internal physical separation: primary current path (pins 7,8,9 / 10,11,12) is electrically isolated from secondary signal circuitry (pins 1–6), with 5 nA insulation leakage at 2000 V DC test voltage and 1 s duration.

Key Specifications

Pinout & Package

Package: Modified DIL-14 (12-pin), with 6 pins assigned to primary current path and 6 to secondary signal interface; body marking "ZMC10D".

Key Features

Applications

Equivalent & Alternatives

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

Compared with ACS712ELCTR-10A-T and TLE4971-25S4, the ZMC10D offers superior thermal stability of sensitivity (−0.12 %/K vs. >−0.2 %/K), built-in 0.7 mΩ conductor, and native 12 V operation-making it optimal for industrial inverters where supply rail and thermal robustness are fixed constraints.

Availability

ZMC10D is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies, switch-mode power supplies, and battery management systems requiring stable component supply and long-term lifecycle support.

Supply support for ZMC10D 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

Zetex Semiconductors plc (now part of Diodes Incorporated) was a UK-based designer of high-performance analog and mixed-signal semiconductors, focused on precision sensing, power management, and interface solutions.

The ZMC series was developed specifically for isolated, contactless current measurement in harsh industrial environments, emphasizing galvanic integrity, thermal stability, and conductor-integrated packaging.

FAQ

What is the maximum continuous current the ZMC10D can measure?

The ZMC10D is rated for continuous direct or alternating current up to 10 A RMS or DC. Its internal conductor is designed for sustained operation at this level with ≤70 mW self-heating at 25 °C ambient. Short-term overload to 300 A is permitted for 10 ms, validated at Tamb = 25 °C.

Does the ZMC10D require external calibration or trimming?

No external calibration is required. The device features factory-trimmed bridge resistors and inherent offset compensation circuitry. Offset voltage is specified as ±19 mV static and ±2 mV dynamic, with current supply rejection ratio (CSRR) of ±1.5 mV/mA, ensuring stable performance without user adjustment.

How is galvanic isolation achieved in the ZMC10D?

Isolation is implemented physically within the modified DIL-14 package: the primary current path (pins 7–9 and 10–12) is separated from the secondary signal circuit (pins 1–6) by molded insulation. This achieves 2000 V DC isolation with ≤5 nA leakage, verified per IEC 60747-5-2 requirements.

Can the ZMC10D be used with a 5 V supply instead of 12 V?

No. The ZMC10D requires a nominal 12 V supply to properly bias its internal constant-current source (13 mA typ.) and magnetoresistive bridge. Operation below 12 V results in reduced or unstable bridge current, degrading sensitivity, linearity, and offset performance per datasheet electrical characteristics.