Description

The O213M2121M is an IC chip designed for current sensing and measurement in various electronic devices. It has the ability to measure small differential voltage on a high-side shunt resistor and convert it into a ground-referenced output voltage. The chip provides a wide common-mode operating range that is independent of the supply voltage and has a wide common-mode surviving range under reversed battery and load-dump conditions.

Specifications and features

• Wide common-mode operating range: 2.8 to 30 V
• Wide common-mode surviving range: -32 to 60 V (reversed battery and load-dump conditions)
• Maximum input offset voltage: ±1.5 mV for Tamb = 25°C and ±2.3 mV for -40°C < Tamb < 125°C
• Maximum total output voltage error: ±1.5% for Tamb = 25°C and ±2.5% for -40°C < Tamb < 125°C
• Maximum variation over temperature: dVos/dT = 8 µV/°C and dVout/dT = 100 ppm/°C
• Low current consumption: ICC max = 300 µA
• Operating temperature range: -40 to 125°C
• Internally fixed gain: 20 V/V, 50 V/V
• EMI filtering

Application Scenarios

• Automotive current monitoring
• Notebook computers
• Server power supplies
• Telecom equipment
• Industrial SMPS
• Current sharing
• LED current measurement

Comparison

• Wide common-mode operating and surviving range make it suitable for various applications
• Low current consumption helps in saving power
• Internally fixed gain provides accurate measurements
• EMI filtering helps in reducing unwanted noise and interference

• None