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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Beskrivning Pris 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-artikelnummer 922-8238
Tillv. art.nrZXCT1107SA-7
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Tillv. art.nrZXCT1110W5-7
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RS-artikelnummer 122-0319
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RS-artikelnummer 738-5131
Tillv. art.nrZXCT1022E5TA
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RS-artikelnummer 922-8241
Tillv. art.nrZXCT1087E5TA
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RS-artikelnummer 922-8232
Tillv. art.nrZXCT1109SA-7
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RS-artikelnummer 122-0315
Tillv. art.nrZXCT1082E5TA
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- 2.7 to 60 V - 80dB - - - - - - - - - -
RS-artikelnummer 922-7617
Tillv. art.nrZXCT1009FTA
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3,901 kr
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- 2.5 → 20 V - - - - - Surface Mount SOT-23 3 3.05 x 1.4 x 1mm 1mm 3.05mm -
RS-artikelnummer 922-8235
Tillv. art.nrZXCT1084E5TA
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RS-artikelnummer 154-920
Tillv. art.nrZXCT1009FTA
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8,478 kr
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- 2.5 → 20 V - - - - - Surface Mount SOT-23 3 3.05 x 1.4 x 1mm 1mm 3.05mm -
RS-artikelnummer 738-5276
Tillv. art.nrZXCT1109SA-7
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RS-artikelnummer 738-5279
Tillv. art.nrZXCT1087E5TA
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RS-artikelnummer 122-0307
Tillv. art.nrZXCT1022E5TA
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RS-artikelnummer 122-3297
Tillv. art.nrZXCT1020E5TA
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5,082 kr
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Single 2.5 → 20 V - - 1 Low Offset Current 35 μA Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 1.3mm 3.1mm 20 V
RS-artikelnummer 738-5250
Tillv. art.nrZXCT1082E5TA
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12,966 kr
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Single 2.7 → 60 V - 80dB - - - - - - - - - -
RS-artikelnummer 738-5263
Tillv. art.nrZXCT1084E5TA
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12,966 kr
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RS-artikelnummer 824-5475
Tillv. art.nrZXCT1020E5TA
VarumärkeDiodesZetex
9,358 kr
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Single 2.5 → 20 V - - 1 Low Offset Current 35 μA Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 1.3mm 3.1mm 20 V