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REFSENS003 - Reference Design

30A Current Sensing with current sense Amplifier (CSA)

REFSENSE003-EVK-001 is a reference design with a current sense amplifier: BD14210G-LA and a shunt resistor: LTR50UZPFU, which can be considered for current measurement using a shunt resistor. Current measurement circuits are used in various devices for high-side/low-side current sense, overcurrent sense, and current control of motors. The reference designs of shunt resistors and current-sense amplifiers presented on this website can be used for various current measurements as a solution that offers both high accuracy and small area. Design data and reference boards are available for purchase. Please make use of them to reduce your design man-hours.

  • Built-in 1ch current sense amplifier BD14210G-LA/shunt resistor LTR50.
  • Achieves current sense accuracy of 1%
  • Supports current sense up to 30A
  • Connectable with AD converter BU79100G-LA-EVK-001


Design Resources



Board Number Input voltage Common Mode Voltage Gain Gain Accuracy Current Sense Range Size
BD14210G-EVK-001 2.7 to 5.5V -0.2 to +26V 20V/V Max1% up to 30A 90mm×80mm

Distribution Inventory

Board Number Distributor Quantity Available

Key Components

Board Number Product Category Part Number Datasheet Status SPICE LTspice Thermal Model Symbol & Footprint 3D STEP Samacsys ECAD Library Calc Tool ROHM Solution Simulator
BD14210G-EVK-001 Current Sensor IC BD14210G-LA - Recommended - - - -
BD14210G-EVK-001 Optical Sensor for Heart Rate Monitor BH1790GLC - Last Time Buy -
BD14210G-EVK-001 Current Detection Resistors LTR50UZPFU - Recommended -