Current Sensing Amplifiers

Current sensing amplifiers measure current by outputting a voltage that is proportional to the flowing power current. A resistor is used to convert the load current to a small voltage which is then accurately amplified. They offer real-time overcurrent protection.

What are the different applications of current sensing amplifiers?

Accurate current sensing is crucial to optimising performance in a range of applications, such as motor control and power management. In devices where battery or power-line monitoring is highly necessary, like laptops and phones, current sensing amplifiers are critical.

How to choose the right type of current sensing amplifier

There are several factors that will determine the the type of amplifier you choose, including whether the measurement will be on the high or low side. The sense resistor can be placed either between the supply voltage and load, or between the load and ground. The former is called high-side seinsing, whereas the latter is called low-side sensing. High voltage current sensing amplifiers offer input ranges up to +76V and down to -20V, ideal for applications such as motor control and network routers. Low power current sensing amplifiers help to maximise and extend battery life.


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Omschrijving Prijs Power Supply Type Typical Single Supply Voltage Typical Dual Supply Voltage Minimum CMRR Number of Channels per Chip Output Type Maximum Supply Current Mounting Type Package Type Pin Count Dimensions Height Length Maximum Operating Supply Voltage
RS-stocknr. 170-8124
FabrikantnummerISL28022FRZ-T7A
FabrikantIntersil
€ 1,793
Each (On a Reel of 250)
Aantal stuks
Single 3.3 V - 110dB 2 Open Drain 0.7 mA Surface Mount QFN 16 3 x 3 x 0.85mm 0.85mm 3mm 5.5 V
RS-stocknr. 121-7248
FabrikantnummerISL28022FRZ-T7A
FabrikantIntersil
€ 2,775
Each (In a Pack of 2)
Aantal stuks
Single 3.3 V - 110dB 2 Open Drain 0.7 mA Surface Mount QFN 16 3 x 3 x 0.85mm 0.85mm 3mm 5.5 V
RS-stocknr. 170-8125
FabrikantnummerISL28023FR12Z-T7A
FabrikantIntersil
€ 3,602
Each (On a Reel of 250)
Aantal stuks
Single 3.3 V - 136dB 2 Open Drain 1.24 mA Surface Mount QFN 24 4 x 4 x 0.85mm 0.85mm 4mm 5.5 V
RS-stocknr. 121-7249
FabrikantnummerISL28023FR12Z-T7A
FabrikantIntersil
€ 5,165
Each (In a Pack of 2)
Aantal stuks
Single 3.3 V - 136dB 2 Open Drain 1.24 mA Surface Mount QFN 24 4 x 4 x 0.85mm 0.85mm 4mm 5.5 V