Monolithic Power Systems Inc. EVCS1803-S-30-00A

Overview

EVCS1803-S-30-00A from Monolithic Power Systems is a linear Hall-effect current sensor evaluation board designed to demonstrate the MCS180XGS-30 current sensor IC, operating at 5V supply with ±30A primary current range and 66 mV/A typical sensitivity, enabling accurate galvanically isolated DC/AC current measurement in power electronics test environments.

For engineers reviewing the EVCS1803-S-30-00A datasheet, EVCS1803-S-30-00A pinout, EVCS1803-S-30-00A application, or EVCS1803-S-30-00A equivalent, this board supports rapid validation of Hall-based isolation performance, bandwidth (up to 100 kHz), output linearity, and thermal stability under real-world load conditions.

Technical Context

The board implements the MCS180XGS-30 IC in SOIC-8 package with differential Hall array architecture that rejects external magnetic interference. It features dual power options (3.3 V or 5 V), but this variant is optimized for 5 V operation and ±30 A sensing range.

Primary conductor terminals (IP+, IP−) are physically isolated from signal pins (VCC, GND, VOUT, FILT), providing galvanic isolation up to 2.4 kVRMS. Output voltage follows VOUT = 0.5 × VCC + Sens(TYP) × IP, delivering 2.5 V quiescent offset and 66 mV/A gain at 5 V supply.

Key Specifications

Availability

EVCS1803-S-30-00A 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-30-00A 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, with design focus on efficiency, integration, and reliability across industrial, automotive, and computing applications.

This evaluation board belongs to MPS's current sensing product line, engineered to accelerate adoption of their galvanically isolated Hall-effect sensors by providing validated reference layouts, decoupling networks, and screw-terminal interfaces for lab and benchtop testing.

FAQ

What is the purpose of the FILT pin on the EVCS1803-S-30-00A board?

The FILT pin connects to an optional external capacitor (C4) that forms a low-pass filter with the internal sensor output impedance. Configuring C4 adjusts system bandwidth: 0 pF yields full 100 kHz response, while larger values reduce noise at the expense of rise time-e.g., 1 nF lowers bandwidth to ~16 kHz.

Can the EVCS1803-S-30-00A operate with a 3.3 V supply instead of 5 V?

No-this specific board variant (EVCS1803-S-30-00A) is optimized for 5 V operation and the MCS180XGS-30 IC. While the MCS180X family supports both 3.3 V and 5 V supplies, the -30 suffix denotes the 5 V version with 66 mV/A sensitivity; using 3.3 V would violate the IC's specified operating conditions and invalidate output scaling.

How is galvanic isolation achieved on this evaluation board?

Isolation is implemented via the MCS180XGS-30 IC itself-not the board-using integrated magnetic coupling between the primary conductor (IP+, IP−) and Hall sensing element. The board maintains physical separation: primary terminals are routed on outer layers with >8 mm creepage/clearance, and no copper connects primary to secondary side, preserving 2.4 kVRMS isolation rating.

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

IP+ and IP− are 4-pin Philips screw terminals that interface directly with the primary current-carrying conductor path inside the MCS180XGS-30 IC. They accept wire gauges up to 12 AWG and provide secure, low-resistance (0.9 mΩ total) connections for injecting ±30 A DC or AC current without soldering or PCB trace limitations.

Does the board include calibration or trimming components?

No-the EVCS1803-S-30-00A contains no user-adjustable trims, potentiometers, or calibration jumpers. Offset and sensitivity are factory-trimmed within the MCS180XGS-30 IC. Board-level components (C1, C2, C3, C4) serve only decoupling, filtering, and bandwidth setting; accuracy relies entirely on the pre-calibrated IC performance.

What is the significance of the "S" in the part number EVCS1803-S-30-00A?

The "S" denotes "single-ended output" configuration-this board outputs a single-ended analog voltage (VOUT) referenced to GND, as opposed to differential output variants. It matches the MCS180XGS-30 IC's native output architecture and simplifies interfacing with standard ADC inputs or op-amp stages.