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. 190-6329
FabrikantnummerMAX4373FEUA+T
FabrikantMaxim Integrated
€ 2,17
Each (In a Pack of 5)
Aantal stuks
Single 2.7 → 28 V - 85 (Typ.)dB 1 Voltage 100 μA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 28 V
RS-stocknr. 922-8235
FabrikantnummerZXCT1084E5TA
FabrikantDiodesZetex
€ 0,636
Each (On a Reel of 3000)
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 190-4373
FabrikantnummerMAX9611AUB+T
FabrikantMaxim Integrated
€ 1,798
Each (On a Reel of 2500)
Aantal stuks
Single 2.7 → 5.5 V - 84dB 1 Rail to Rail 2.6 mA Surface Mount μMAX 10 3.16 x 3.12 x 0.95mm 0.95mm 3.16mm 5.5 V
Nieuw
RS-stocknr. 203-3516
FabrikantnummerTSC213ICT
€ 0,483
Each (On a Reel of 3000)
Aantal stuks
Single 2.7 V, 26 V - 120dB 1 Bidirectional - - SC-70 6 - - - -
RS-stocknr. 190-6395
FabrikantnummerMAX44284HAUT+T
FabrikantMaxim Integrated
€ 1,60
Each (In a Pack of 5)
Aantal stuks
Single 1.7 → 5.5 V - 91.3dB 1 Voltage 41.5 μA Surface Mount SOT-23 6 3 x 1.75 x 1.3mm 1.3mm 3mm 5.5 V
RS-stocknr. 166-0789
FabrikantnummerTSC101CILT
€ 0,459
Each (On a Reel of 3000)
Aantal stuks
Single 5 V, 9 V, 12 V, 15 V, 18 V - 90dB 1 - 0.3 mA Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm 24 V
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