Monolithic Power Systems Inc. EVCS1806-S-5-40-00A

Overview

EVCS1806-S-5-40-00A from Monolithic Power Systems is a 3kVRMS galvanically isolated evaluation board for the MCS1806GS-5-40 current sensor IC, supporting ±40A DC/AC primary current sensing at 5V supply with 50mV/A typical sensitivity and <2.5% total accuracy across 10–100% of full scale in industrial motor control and power supply monitoring applications.

For engineers reviewing the EVCS1806-S-5-40-00A datasheet, EVCS1806-S-5-40-00A pinout, EVCS1806-S-5-40-00A application, or EVCS1806-S-5-40-00A equivalent, this board enables rapid validation of isolated current measurement performance, bandwidth tuning via C4, and direct interface to MCU ADCs with differential stray-field rejection and SOIC-8 footprint compatibility.

Technical Context

The EVCS1806-S-5-40-00A implements a fixed-gain, single-supply 5V Hall-effect current sensing architecture with integrated primary conductor path and isolated signal output. It uses a differential Hall array to reject external magnetic interference and delivers ratiometric analog voltage output (VOUT = 2.5V + 50mV/A × IP) referenced to VCC.

Board-level design includes screw terminals (IP+, IP−) for primary current injection, dedicated VCC/GND/VOUT/FILT test points, and configurable bandwidth via capacitor C4 (not populated by default). The isolation barrier meets 3kVRMS reinforced insulation per IEC 60747-17.

Key Specifications

Availability

EVCS1806-S-5-40-00A is available at Aetrix Electronics and suitable for industrial motor drives, server PSU monitoring, and renewable energy inverters requiring stable component supply, repeatable evaluation hardware, and traceable sourcing of isolated current sensing solutions.

Supply support for EVCS1806-S-5-40-00A 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, motor drivers, and precision analog sensors.

The MCS1806GS series targets high-accuracy isolated current sensing in space-constrained, safety-critical systems-designed to replace optocouplers and discrete shunt+amplifier+isolator combinations with integrated SOIC-8 solutions.

FAQ

What is the primary purpose of the EVCS1806-S-5-40-00A evaluation board?

This board is designed exclusively to evaluate the MCS1806GS-5-40 Hall-effect current sensor IC. It provides a ready-to-use platform with screw terminals for primary current injection, test points for VOUT and FILT, and layout-optimized isolation to validate accuracy, linearity, bandwidth, and noise performance under real-world conditions before system integration.

How does the board achieve magnetic field immunity?

The board hosts the MCS1806GS-5-40 IC, which integrates a differential Hall sensor array physically arranged to cancel uniform external magnetic fields. This architecture rejects common-mode stray fields without requiring external shielding or calibration, enabling reliable operation in noisy motor drive or power converter environments.

Can the EVCS1806-S-5-40-00A operate with a 3.3V supply?

No-it is configured specifically for the MCS1806GS-5-40 variant, which requires a 5V supply. The "-5-" in the part number denotes 5V operation; using 3.3V would result in incorrect VOUT offset (2.5V), reduced dynamic range, and potential failure to meet <2.5% accuracy specification. For 3.3V use, select EVCS1806-S-3-40-00A.

What role does capacitor C4 play on this board?

C4 is an optional external capacitor that sets the sensor's output bandwidth. When installed, it forms a low-pass filter with internal resistance to reduce high-frequency output ripple and noise. Its value directly determines cutoff frequency-lower capacitance yields higher bandwidth but more noise; higher capacitance improves noise rejection at the cost of slower transient response.

Does this evaluation board include the current sensor IC?

Yes-the board includes one pre-soldered MCS1806GS-5-40 IC in SOIC-8 package (U1), along with decoupling capacitors (C1, C2), unpopulated positions for C3 and C4, and dual screw terminals (IP+, IP−) for primary current connection. No additional assembly is required to begin functional testing.

Is the isolation rating certified to any safety standard?

The board implements the MCS1806GS-5-40 IC, which provides 3kVRMS reinforced isolation compliant with IEC 60747-17. While the evaluation board itself is not independently certified, its layout maintains creepage/clearance distances aligned with reinforced insulation requirements for up to 300V working voltage in pollution degree 2 environments.