Monolithic Power Systems Inc. MCS1802GS-10-Z

Overview

MCS1802GS-10-Z from Monolithic Power Systems is a 3.3V linear Hall-effect current sensor with galvanic isolation, ±10A bidirectional sensing range, ±2.5% total output error over temperature (−40°C to +125°C), 132 mV/A sensitivity, and 2.2kVRMS isolation voltage-designed for real-time current monitoring in motor control inverters and industrial power supplies.

For engineers reviewing the MCS1802GS-10-Z datasheet, MCS1802GS-10-Z pinout, MCS1802GS-10-Z application, or MCS1802GS-10-Z equivalent, key selection criteria include primary conductor resistance (0.9 mΩ), ratiometric output behavior, adjustable bandwidth up to 100 kHz via external FILT capacitor, and immunity to stray magnetic fields via differential Hall array architecture.

Technical Context

The MCS1802GS-10-Z implements a differential Hall-sensing topology with two integrated transducers placed asymmetrically along a low-resistance primary conductor (0.9 mΩ), enabling rejection of common-mode magnetic interference. Its spinning current technique minimizes offset drift, while internal filter components (RFi = 1.5 kΩ, CFi = 1 nF) allow bandwidth tuning via external CF on the FILT pin.

Galvanic isolation is achieved through physical separation of primary current path (IP+/IP−) and signal pins (VCC/VOUT/FILT/GND), certified to 2.2kVRMS withstand voltage per IEC62368-1. The device operates from 3.0–3.6V supply, delivers ratiometric analog output centered at VCC/2, and features factory-trimmed sensitivity and zero-current offset for ±2.5% accuracy across −40°C to +125°C.

Key Specifications

Pinout & Package

SOIC-8 package (5 mm × 4 mm, 1.27 mm pitch) with creepage/clearance ≥4.2 mm between primary and signal sides for reinforced isolation compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ACS712ELCTR-10A-T and TLE4971-10S4, the MCS1802GS-10-Z uniquely combines 3.3V operation, analog ratiometric output, FILT-tunable bandwidth, and guaranteed ±2.5% accuracy over temperature-making it optimal for space-constrained, thermally demanding analog-feedback systems.

Availability

MCS1802GS-10-Z is available at Aetrix Electronics and suitable for motor control inverters, automotive battery management systems, and switch-mode power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MCS1802GS-10-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 design focus on efficiency, integration, and reliability for industrial, automotive, and computing applications.

The MCS1802 product line delivers isolated, high-accuracy current sensing for real-time power path monitoring-targeting applications where galvanic isolation, low power loss, and temperature-stable analog output are critical.

FAQ

What is the maximum primary current the MCS1802GS-10-Z can safely handle beyond its ±10A range?

The device supports transient currents up to 250A (10ms single peak) and surge currents up to 3000A (8µs/20µs pulse), per IEC61000-4-5. Continuous operation beyond ±10A increases nonlinearity but maintains monotonic output until saturation at VCC–0.3V or 0.3V. Junction temperature must remain ≤165°C.

How does the FILT pin affect bandwidth, and what capacitor value achieves 50kHz?

FILT sets bandwidth via external capacitor CF using fBW = 1/(2π × RFi × (CF + CFi)), where RFi = 1.5 kΩ and CFi = 1 nF. For 50 kHz, CF ≈ 1.1 nF. A 1 nF capacitor yields ~53 kHz; 2.2 nF yields ~35 kHz. CF must be X7R ceramic with ≤100 mΩ ESR.

Is the MCS1802GS-10-Z compliant with automotive AEC-Q200?

No-the MCS1802GS-10-Z is qualified per industrial temperature grade (−40°C to +125°C) and meets IEC62368-1 isolation standards, but it is not AEC-Q200 stress-tested or certified for automotive use. MPS offers AEC-Q200 variants under separate part numbers (e.g., MCS1802-AQ series).

Can the MCS1802GS-10-Z measure AC current with zero-crossing accuracy?

Yes-its 100 kHz bandwidth and 4 µs rising time support accurate AC measurement up to 10 kHz sine waves. Zero-crossing error is minimized by low offset drift (±10 mV over −40°C to +125°C) and ratiometric output, enabling sub-degree phase error in PFC and inverter applications.

What is the recommended PCB layout for minimizing magnetic coupling errors?

Route IP+ and IP− traces as a tightly coupled, symmetric pair with minimal loop area; keep signal traces (VOUT, FILT, GND) >5 mm from primary path; use solid ground plane beneath signal side only; avoid placing ferromagnetic materials or current-carrying traces within 10 mm of the SOIC-8 package body.

Does the MCS1802GS-10-Z require calibration after soldering?

No-factory trimming covers sensitivity, zero-current offset, and ratiometry. Post-solder drift is limited to ±1% lifetime total output error. No end-of-line calibration is needed unless system-level accuracy tighter than ±2.5% is required, in which case one-point offset trim at 0A suffices.

How is isolation verified during production?

Every unit undergoes 100% production testing per IEC62368-1 for 2.2kVRMS withstand voltage (60-second dielectric test). External clearance and creepage (≥4.2 mm) are validated via automated optical inspection of molded package geometry and leadframe placement.