Monolithic Power Systems Inc. EVCS1806-S-5-05-00A

Overview

EVCS1806-S-5-05-00A from Monolithic Power Systems is a 3kVRMS isolated Hall-effect current sensor evaluation board designed to demonstrate the MCS1806GS-5-05, a high-accuracy linear current sensor with ±5A primary current range, 5V supply, 400mV/A typical sensitivity, <2.5% total accuracy (10–100% of IP_MAX), and galvanic isolation for AC/DC sensing in power converters and motor drives.

For engineers reviewing the EVCS1806-S-5-05-00A datasheet, EVCS1806-S-5-05-00A pinout, EVCS1806-S-5-05-00A application, or EVCS1806-S-5-05-00A equivalent, this board enables rapid validation of isolated current measurement performance, bandwidth tuning via C4, output linearity under ±5A DC/AC loads, and integration into 5V-powered industrial control or energy metering systems.

Technical Context

The EVCS1806-S-5-05-00A implements a differential Hall array architecture that rejects stray magnetic fields and supports bidirectional current sensing. It interfaces directly with the MCS1806GS-5-05 SOIC-8 sensor IC, which features internal gain calibration and ratiometric output scaling relative to VCC.

Primary conductor terminals (IP+, IP−) are physically and galvanically isolated from low-voltage signal pins (VCC, GND, VOUT, FILT), enabling safe high-side or floating current measurement up to 3kVRMS working voltage. Bandwidth is adjustable via external capacitor C4 on the FILT pin.

Key Specifications

Availability

EVCS1806-S-5-05-00A is available at Aetrix Electronics and suitable for industrial motor control, server PSU monitoring, and renewable energy inverters requiring stable component supply, repeatable sensor characterization, and fast-turn evaluation of isolated current feedback loops.

Supply support for EVCS1806-S-5-05-00A 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, including DC/DC converters, LED drivers, and precision analog sensors.

The MCS1806GS series was developed to replace optocoupler-based current sensing in high-efficiency power systems, delivering improved temperature stability, lower drift, and integrated galvanic isolation without external transformers or amplifiers.

FAQ

What is the function of the FILT pin on the EVCS1806-S-5-05-00A?

The FILT pin connects to an external capacitor (C4) to set the sensor's bandwidth. A larger capacitance reduces output voltage ripple and noise but lowers response speed; default open-circuit configuration yields maximum bandwidth per the MCS1806GS-5-05 datasheet specifications.

Can the EVCS1806-S-5-05-00A measure AC current?

Yes - the MCS1806GS-5-05 sensor on this board supports true bidirectional current sensing, enabling accurate measurement of both DC and AC waveforms up to its bandwidth limit, with output centered at VCC/2 (2.5V at 5V supply) and proportional to instantaneous current polarity and magnitude.

What is the purpose of the screw terminals labeled IP+ and IP−?

IP+ and IP− are isolated primary conductor terminals that carry the current to be measured. They form a low-resistance, high-isolation path separate from the low-voltage signal circuitry, allowing safe high-side, low-side, or floating current sensing without ground loop interference.

Does this evaluation board require calibration before use?

No factory calibration is required. The MCS1806GS-5-05 integrates factory-trimmed sensitivity and offset compensation. Output accuracy remains within <2.5% total error across temperature and linearity when operated within specified supply (5V ±5%) and ambient (–40°C to +125°C) conditions.

How is galvanic isolation achieved on this board?

Isolation is implemented by the MCS1806GS-5-05 SOIC-8 IC itself, which uses on-chip capacitive isolation between the primary conductor path and secondary signal pins. The board maintains ≥8mm creepage/clearance distances and achieves 3kVRMS withstand rating per IEC 60747-5-5, eliminating need for external isolators.