Monolithic Power Systems Inc. MCQ1806GS-5-10-AEC1-Z

Overview

MCQ1806GS-5-10-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, galvanically isolated Hall-effect current sensor for bidirectional AC/DC current measurement. It delivers ±2.5% total output error over -40°C to +125°C, supports ±10A primary current range with 200 mV/A sensitivity, and features 3kVRMS isolation voltage and 500VRMS working voltage. It is used in automotive motor control inverters where high accuracy, magnetic immunity, and safety isolation are required.

For engineers reviewing the MCQ1806GS-5-10-AEC1-Z datasheet, MCQ1806GS-5-10-AEC1-Z pinout, MCQ1806GS-5-10-AEC1-Z application, or MCQ1806GS-5-10-AEC1-Z equivalent, this page provides verified technical context, SOIC-8 pin mapping, real-world automotive use cases, and validated alternative options for current sensing in high-reliability power conversion systems.

Technical Context

The MCQ1806GS-5-10-AEC1-Z integrates a differential Hall array with spinning current offset cancellation to reject stray magnetic fields and achieve stable zero-current output (VOUT(Q) = VCC/2). Its internal 0.9mΩ primary conductor enables low-loss current sensing while maintaining galvanic isolation between power and signal domains.

It employs factory-trimmed sensitivity (200 mV/A), ratiometric output scaling (KSENS = 98–102%, KVO = 99–101%), and adjustable bandwidth up to 100kHz via external FILT capacitor. Propagation delay is 1.5µs and response time is 5µs, supporting fast fault detection in motor phase-leg monitoring.

Key Specifications

Pinout & Package

MCQ1806GS-5-10-AEC1-Z is housed in a standard SOIC-8 package (5mm × 4mm, 1.5mm height) with creepage and clearance ≥4.2 mm, rated for 3kVRMS isolation. The package supports surface-mount reflow and meets AEC-Q100 Grade 1 reliability requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated Hall-effect current sensing applications.

Compared with ACS724LLCTR-10AU-T and TLE4971-25S4, the MCQ1806GS-5-10-AEC1-Z uniquely combines AEC-Q100 Grade 1 operation, 3kVRMS isolation, 5µs response, and exact ±10A/200mV/A matching-enabling drop-in replacement in space-constrained 400V inverter designs without redesign.

Availability

MCQ1806GS-5-10-AEC1-Z is available at Aetrix Electronics and suitable for automotive traction inverters, on-board chargers, electric power steering systems, and DC-DC converters requiring stable component supply across extended temperature and high-reliability lifecycles.

Supply support for MCQ1806GS-5-10-AEC1-Z 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with core expertise in DC-DC conversion, motor drivers, and isolated sensing solutions.

The MCQ1806 product line is designed specifically for AEC-Q100-compliant automotive current sensing, targeting high-efficiency, compact, and thermally robust replacements for optocoupler- and shunt-based isolation in electrified vehicle power stages.

FAQ

What is the maximum continuous primary current the MCQ1806GS-5-10-AEC1-Z can measure with full accuracy?

The device maintains ±2.5% total output error across its optimized range of ±10A at TJ = −40°C to +125°C. Beyond ±10A, output remains linear but nonlinearity increases; saturation occurs near ±60A depending on thermal conditions and VCC.

Does the MCQ1806GS-5-10-AEC1-Z require external calibration for production use?

No. Sensitivity and offset are factory-trimmed during wafer sort. Zero-current output is guaranteed within ±15mV over temperature, and sensitivity error is limited to ±2% across the operating range-enabling plug-and-play integration without system-level trimming.

How does the FILT pin affect noise and bandwidth performance?

Connecting a capacitor (CF) between FILT and GND sets the 3dB bandwidth: e.g., 1nF yields ~100kHz, 10nF yields ~10kHz. This trade-off directly reduces input-referred RMS noise (e.g., 50mA at 60kHz with 1nF) while preserving DC accuracy and response linearity.

Can the MCQ1806GS-5-10-AEC1-Z be used in 400V battery systems?

Yes. With 500VRMS working voltage and 3kVRMS isolation, it meets IEC62368-1 basic insulation requirements for 400V DC bus monitoring. External creepage and clearance (≥4.2mm) ensure reliable operation in high-humidity under-hood environments.

What is the thermal impact of the 0.9mΩ internal conductor at 10A continuous current?

At 10A DC, power dissipation is 0.9mΩ × (10A)² = 90mW. With θJA ≈ 120°C/W (SOIC-8, 2-layer board), junction rise is ~11°C above ambient-well within the −40°C to +125°C operating range and supporting sustained operation without derating.

Is the output truly ratiometric across the full supply range?

Yes. Ratiometry coefficients KSENS (98–102%) and KVO (99–101%) are specified over VCC = 4.5–5.5V, ensuring output scale and zero-point track supply variation-critical for systems using the same 5V rail for both sensor and ADC reference.

How does the differential Hall architecture improve magnetic immunity?

The dual Hall transducers sense magnetic field gradients rather than absolute field strength. Stray uniform fields induce equal voltages at both points, which cancel in the differential amplifier stage-achieving >40dB rejection of external 50/60Hz and switching-frequency interference.