Monolithic Power Systems Inc. MCQ1806GS-3-10-AEC1-Z

Overview

MCQ1806GS-3-10-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 up to ±10A, featuring ±2.5% total output error over -40°C to +125°C, 3.3V single-supply operation, and 3kVRMS isolation voltage. It replaces optocouplers in automotive motor control, inverter phase-leg monitoring, and over-current protection circuits where compact SOIC-8 footprint and magnetic field immunity are critical.

For engineers reviewing the MCQ1806GS-3-10-AEC1-Z datasheet, MCQ1806GS-3-10-AEC1-Z pinout, MCQ1806GS-3-10-AEC1-Z application, or MCQ1806GS-3-10-AEC1-Z equivalent, this page delivers verified specifications including sensitivity (132 mV/A), primary conductor resistance (0.9 mΩ), adjustable bandwidth (up to 100 kHz), ratiometric output behavior, and AEC-Q100 qualification evidence - all essential for functional safety–aligned current sensing design.

Technical Context

The MCQ1806GS-3-10-AEC1-Z implements 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 integrated primary conductor (0.9 mΩ) enables low-loss, high-fidelity current sampling without external shunts.

Galvanic isolation is achieved via reinforced dielectric barrier between primary current path (IP+/IP−) and signal pins (VCC/VOUT/FILT/GND), certified to 3kVRMS withstand voltage and 500VRMS working voltage per IEC62368-1. Bandwidth is externally adjustable via capacitor on FILT pin, supporting noise-performance tradeoffs from <10 kHz to 100 kHz.

Key Specifications

Pinout & Package

MCQ1806GS-3-10-AEC1-Z uses a standard SOIC-8 (5 mm × 4 mm) package with internal primary conductor routing and reinforced creepage/clearance (4.2 mm) for high-voltage isolation.

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 TLE4971-25S4-10-1-33-000, the MCQ1806GS-3-10-AEC1-Z uniquely balances AEC-Q100 Grade 1 qualification, 3.3V native operation, ±2.5% accuracy, and user-adjustable bandwidth - making it optimal for cost-constrained, space-limited automotive inverters requiring functional safety alignment without external regulators or calibration.

Availability

MCQ1806GS-3-10-AEC1-Z is available at Aetrix Electronics and suitable for automotive motor control, on-board charger input monitoring, and battery management systems requiring stable component supply with guaranteed AEC-Q100 conformance and long-term production continuity.

Supply support for MCQ1806GS-3-10-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 over two decades of leadership in DC/DC converters, motor drivers, and precision analog sensing solutions.

The MCQ1806 product line was designed specifically for automotive-grade isolated current sensing in electrified powertrains, emphasizing AEC-Q100 reliability, magnetic immunity, and integration density to replace legacy opto- and shunt-based solutions.

FAQ

What is the maximum continuous primary current the MCQ1806GS-3-10-AEC1-Z can measure with specified accuracy?

The device is optimized for ±10A with ±2.5% total output error across −40°C to +125°C. It remains functional beyond ±10A (up to ±50A), but nonlinearity increases outside the rated range, and saturation occurs near ±15A depending on VCC and load conditions.

How does the FILT pin affect bandwidth and noise performance?

Connecting a capacitor (CF) between FILT and GND sets the 3dB bandwidth: 1 nF yields ~100 kHz, 10 nF yields ~10 kHz. Larger CF reduces high-frequency noise but increases response time; floating FILT enables maximum bandwidth and fastest transient response.

Is external calibration required for production use?

No. The MCQ1806GS-3-10-AEC1-Z is factory-trimmed for sensitivity and offset, delivering ±2.5% total error without system-level calibration. Only end-of-line verification is needed to confirm board-level layout and thermal effects.

Can this sensor replace a shunt resistor in high-side current measurement?

Yes - its galvanic isolation eliminates the need for high-side signal conditioning or level-shifting. With 0.9 mΩ primary resistance, it avoids shunt power loss and thermal drift while providing inherent common-mode rejection up to 500VRMS working voltage.

What is the minimum recommended bypass capacitance on VCC?

A 1 µF low-ESR ceramic capacitor must be placed as close as possible to the VCC pin (Pin 8). This stabilizes the internal regulator, suppresses switching noise from the Hall driver, and ensures clean startup under load transients.

Does the device support bidirectional current sensing out of the box?

Yes - VOUT is ratiometric and centered at VCC/2 (e.g., 1.65V at 3.3V supply), so positive current raises VOUT above midpoint and negative current lowers it. No external biasing or op-amp circuitry is required for true bidirectional operation.

How is isolation verified during manufacturing?

Every unit undergoes 100% production testing for 3000 VRMS withstand isolation voltage per IEC62368-1. Dielectric surge strength (6000 V) and working voltage (500 VRMS) are type-tested per IEC61000-4-5 and IEC62368-1, with full traceability documentation available upon request.