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

Overview

MCQ1806GS-5-10-AEC1-P 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 200 mV/A sensitivity, ±2.5% total output error over -40°C to +125°C, 3kVRMS isolation voltage, and SOIC-8 package with integrated 0.9mΩ primary conductor - deployed in automotive motor control and inverter phase-leg monitoring.

For engineers reviewing the MCQ1806GS-5-10-AEC1-P datasheet, MCQ1806GS-5-10-AEC1-P pinout, MCQ1806GS-5-10-AEC1-P application, or MCQ1806GS-5-10-AEC1-P equivalent, key selection considerations include its ratiometric analog output referenced to 5V supply, differential Hall architecture rejecting stray magnetic fields, adjustable bandwidth via FILT pin capacitor, and compliance with IEC62368-1 basic isolation at 500VRMS working voltage.

Technical Context

The MCQ1806GS-5-10-AEC1-P integrates a differential Hall array with spinning current offset cancellation and on-chip signal conditioning to deliver linear, temperature-stable current sensing without magnetic hysteresis. Its primary conductor (IP+/IP−) forms a low-resistance (0.9mΩ), high-current path physically separated from the signal side by reinforced isolation barrier.

Signal chain includes factory-trimmed sensitivity control, dynamic offset compensation, internal filter network (RFI = 1.5kΩ, CFI = 1nF), and POR-regulated power management. Output voltage (VOUT) is ratiometric to VCC, centered at VCC/2 under zero current, with propagation delay of 1.5µs and response time of 5µs at full-scale step input.

Key Specifications

Pinout & Package

MCQ1806GS-5-10-AEC1-P uses a standard SOIC-8 (5mm × 4mm) surface-mount package with creepage and clearance ≥4.2mm between primary and secondary sides, rated for 3kVRMS isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMCS1100A1QDR and ACS724LLCTR-10AU-T, the MCQ1806GS-5-10-AEC1-P uniquely combines AEC-Q100 Grade 1 qualification, 3kVRMS isolation, differential magnetic immunity, and factory-trimmed ±2.5% total error - making it the only option qualified for functional safety-critical automotive current sensing without external calibration.

Availability

MCQ1806GS-5-10-AEC1-P is available at Aetrix Electronics and suitable for automotive traction inverters, onboard chargers, and industrial servo drives requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for MCQ1806GS-5-10-AEC1-P 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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MCQ1806 series belongs to MPS's automotive-grade isolated current sensor product line, engineered specifically for functional safety-compliant current measurement in electric vehicle powertrain systems and industrial motor control.

FAQ

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

The device is optimized for ±10A with ±2.5% total output error across -40°C to +125°C. It supports higher currents (up to ±50A) with increasing nonlinearity beyond ±10A, but accuracy degrades outside the specified range per datasheet Figure 3 and ELIN specification.

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

No. The device is factory-trimmed for sensitivity and offset, delivering ±2.5% total output error without system-level calibration. This eliminates production test overhead and ensures consistent performance across units and temperature.

How does the FILT pin affect bandwidth and noise performance?

Connecting a capacitor (CF) between FILT and GND sets the sensor's noise bandwidth: larger CF lowers bandwidth and reduces RMS noise (e.g., 1nF yields ~60kHz, 10nF yields ~10kHz). Leaving FILT floating enables full 100kHz bandwidth for fast transient response.

Can the MCQ1806GS-5-10-AEC1-P be used in DC-only applications like battery management systems?

Yes. It measures both AC and DC currents linearly, with zero-current output at VCC/2. Its 0.9mΩ conductor and ±2.5% error make it suitable for high-accuracy DC bus monitoring in 48V BMS and energy storage systems.

What is the meaning of "AEC-Q100 Grade 1" for this part?

AEC-Q100 Grade 1 certifies operation from -40°C to +125°C junction temperature, including stress testing for HTOL, TC, UHAST, and ESD. This qualifies the part for under-hood automotive applications such as inverters, OBCs, and DC-DC converters.

Is the SOIC-8 package lead-free and RoHS-compliant?

Yes. All MCQ1806 variants are lead-free, halogen-free, and fully compliant with the EU RoHS directive. MPS confirms green status on its Quality Assurance webpage and provides material declarations upon request.