Monolithic Power Systems Inc. EVCS1803-S-10-00A

Overview

EVCS1803-S-10-00A from Monolithic Power Systems is an evaluation board for the MCS180XGS-10 linear Hall-effect current sensor, supporting ±10 A primary current sensing at 5 V supply, delivering 200 mV/A typical sensitivity, 100 kHz bandwidth, and galvanic isolation between primary conductor (IP+/IP−) and signal pins (VOUT, VCC, GND). It enables rapid validation of isolated current measurement in motor control and power supply designs.

For engineers reviewing the EVCS1803-S-10-00A datasheet, EVCS1803-S-10-00A pinout, EVCS1803-S-10-00A application, or EVCS1803-S-10-00A equivalent, this board provides hands-on characterization of MCS180XGS-10's output linearity, rise time (4 μs), isolation capability (3.75 kVRMS), and dual-supply flexibility (3.3 V/5 V) under real-world AC/DC current conditions.

Technical Context

The EVCS1803-S-10-00A implements a differential Hall array on the MCS180XGS-10 IC to reject external magnetic interference while measuring bidirectional current through its integrated 0.9 mΩ primary conductor. Its SOIC-8 footprint hosts internal signal conditioning with ratiometric output scaling (VOUT = 0.5 × VCC + Sens × IP).

Board-level design includes configurable bandwidth via C4 capacitor (default open), decoupling capacitors (C1: 0.1 µF, C2: 4.7 µF), and screw terminals (Keystone 8191K-ND) for secure IP+/IP− connection - enabling repeatable lab testing of ±10 A full-scale current with 2.5 V quiescent output offset at 5 V supply.

Key Specifications

Availability

EVCS1803-S-10-00A is available at Aetrix Electronics and suitable for motor control validation, switch-mode power supply current monitoring, and over-current fault protection prototyping requiring stable component supply and traceable evaluation hardware.

Supply support for EVCS1803-S-10-00A 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 EVCS1803-S-10-00A belongs to MPS's evaluation board product line for the MCS180X family - designed specifically to accelerate development of isolated, high-bandwidth current sensing in automotive, industrial, and computing power systems.

FAQ

What is the primary purpose of the EVCS1803-S-10-00A evaluation board?

This board is a dedicated hardware platform for evaluating the MCS180XGS-10 linear Hall-effect current sensor. It provides ready-to-use connections (screw terminals for IP+/IP−, header pins for VOUT/VCC/GND), calibrated decoupling, and configurable filtering to validate accuracy, bandwidth, and isolation performance under ±10 A DC/AC current at 5 V supply.

Can the EVCS1803-S-10-00A operate with 3.3 V supply?

No - the "-S-10-" suffix in EVCS1803-S-10-00A denotes compatibility with the MCS1803 variant, which is specified for 5 V operation only. The -S-10-00A board is configured for 5 V VCC and uses components (e.g., decoupling caps rated for 16 V) aligned with that voltage; using 3.3 V would result in incorrect output scaling and potential instability.

How is galvanic isolation implemented on this board?

Isolation is provided by the MCS180XGS-10 IC itself - its SOIC-8 package integrates a primary copper conductor (IP+/IP− pins) physically and electrically separated from the low-voltage signal side (VOUT, VCC, GND, FILT). The board maintains creepage/clearance compliance, achieving 3.75 kVRMS isolation without external transformers or optocouplers.

What does the "C4" capacitor do on the EVCS1803-S-10-00A schematic?

C4 is a user-configurable filter capacitor connected between FILT and GND. Its value directly sets the sensor's bandwidth: larger capacitance lowers cutoff frequency (e.g., 1 nF → ~100 kHz; 10 nF → ~10 kHz). Default configuration leaves C4 unpopulated (open), preserving the full 100 kHz bandwidth of the MCS180XGS-10.

Does this board support AC current measurement?

Yes - the MCS180XGS-10 sensor on this board is inherently capable of measuring both AC and DC current due to its linear Hall-effect architecture and differential array. Output voltage (VOUT) tracks instantaneous primary current polarity and magnitude, enabling true RMS-capable measurement when paired with appropriate downstream signal conditioning and sampling.

Where are the VOUT, VCC, and GND test points located on the board?

VOUT, VCC, and GND are accessible via a 4-pin male header (JP1) labeled "U1 PINOUT" per the schematic. Pin 1 = VOUT, Pin 2 = VCC, Pin 3 = GND, Pin 4 = FILT. This header allows direct oscilloscope probing or connection to data acquisition systems without soldering.