Monolithic Power Systems Inc. EVCS1806-S-3-05-00A

Overview

EVCS1806-S-3-05-00A from Monolithic Power Systems is an evaluation board for the MCS1806GS-3-05, a 3.3V-supplied, ±5A full-scale isolated Hall-effect current sensor with 264 mV/A typical sensitivity, 3kVRMS galvanic isolation, and <2.5% total accuracy over 10–100% of range-designed for lab validation of AC/DC current sensing in power converters and motor drives.

For engineers reviewing the EVCS1806-S-3-05-00A datasheet, EVCS1806-S-3-05-00A pinout, EVCS1806-S-3-05-00A application, or EVCS1806-S-3-05-00A equivalent, this board enables rapid functional verification of the MCS1806GS-3-05 sensor's output linearity, isolation integrity, bandwidth tuning via C4, and primary conductor thermal derating under real-world current injection.

Technical Context

The EVCS1806-S-3-05-00A implements a two-layer PCB layout with dedicated high-current primary path (IP+/IP− screw terminals) physically separated from low-voltage sensor circuitry (VCC, GND, VOUT, FILT), enforcing creepage/clearance compliant with 3kVRMS isolation rating. The board integrates the SOIC-8 MCS1806GS-3-05 IC with differential Hall array architecture to reject stray magnetic fields.

It supports direct DC power supply connection (3.3V only for this variant), provides configurable bandwidth via optional C4 capacitor (not populated by default), and delivers ratiometric output: VOUT = 0.5 × VCC + Sens × IP, where Sens = 264 mV/A at ±5A full scale.

Key Specifications

Availability

EVCS1806-S-3-05-00A is available at Aetrix Electronics and suitable for current-sensing validation in switch-mode power supplies, servo motor control systems, and battery management units requiring stable component supply and traceable evaluation hardware.

Supply support for EVCS1806-S-3-05-00A 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, motor drivers, and precision analog sensors.

This evaluation board belongs to MPS's current-sensing product line, engineered to accelerate design-in of their isolated Hall-effect sensors in applications demanding high accuracy, low drift, and reinforced isolation without optical components.

FAQ

What is the primary purpose of the EVCS1806-S-3-05-00A evaluation board?

The EVCS1806-S-3-05-00A is a dedicated test platform for validating the electrical performance-including output linearity, zero-current offset, temperature drift, and isolation robustness-of the MCS1806GS-3-05 current sensor under controlled lab conditions using standard DC power supplies and current sources.

Can this board operate with 5V supply instead of 3.3V?

No. The EVCS1806-S-3-05-00A variant is configured specifically for 3.3V operation and matches the MCS1806GS-3-05 sensor's supply requirement. For 5V operation, use EVCS1806-S-5-05-00A, which pairs with the MCS1806GS-5-05 sensor variant and adjusts VOUT scaling accordingly.

How is bandwidth adjusted on this evaluation board?

Bandwidth is set by capacitor C4 (unpopulated by default). Installing a ceramic capacitor across FILT and GND lowers the sensor's small-signal bandwidth, reducing output voltage ripple noise-per the Quick Start Guide, lower bandwidth trades speed for improved noise immunity in noisy environments.

What are the primary conductor connection options?

The board uses Keystone 8191K screw terminals (IP+ and IP−) rated for up to 12 AWG wire, enabling secure, low-resistance connection of external current-carrying conductors while maintaining isolation integrity and mechanical stability during repeated testing cycles.

Does this board include calibration data or factory-trimmed offsets?

No. The EVCS1806-S-3-05-00A is a bare-metal evaluation platform without onboard calibration memory or pre-trimmed offset compensation. Users must characterize zero-current output voltage and gain error empirically using a calibrated current source and DMM, as specified in the MCS1806GS-3-05 datasheet.