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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Description Price 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 Stock No. 426-269
Mfr. Part No.TSC101CILT
SGD1.912
Each (In a Pack of 5)
units
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
RS Stock No. 166-0789
Mfr. Part No.TSC101CILT
SGD0.823
Each (On a Reel of 3000)
units
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
New
RS Stock No. 215-5537
Mfr. Part No.TSC2010IYDT
SGD1.598
Each (On a Reel of 2500)
units
Single 2.7 → 5.5 V ±7V 90dB 1 Bidirectional - - SO8 8 - - - -
RS Stock No. 426-308
Mfr. Part No.TSC101BILT
SGD1.912
Each (In a Pack of 5)
units
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
New
RS Stock No. 210-9080
Mfr. Part No.TSC2012IYST
SGD3.808
Each (In a Pack of 5)
units
Single 5.5 V - 115 1 Rail to Rail - - Mini SO-8 8 - - - -
RS Stock No. 920-6317
Mfr. Part No.TSC101AILT
SGD0.844
Each (On a Reel of 3000)
units
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
RS Stock No. 860-7514
Mfr. Part No.CS30BL
SGD1.87
Each (In a Pack of 5)
units
Single 2.8 → 30 V - - 2 Single Ended - Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm -
RS Stock No. 860-7517
Mfr. Part No.CS30CL
SGD1.87
Each (In a Pack of 5)
units
Single 2.8 → 30 V - - 2 Single Ended - Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm -
RS Stock No. 203-3514
Mfr. Part No.TSC2012IST
SGD1.371
Each (On a Reel of 4000)
units
Single 2.7 V, 5.5 V - 115dB 1 Bidirectional - - MiniSO8 8 - - - -
RS Stock No. 203-3516
Mfr. Part No.TSC213ICT
SGD0.829
Each (On a Reel of 3000)
units
Single 2.7 V, 26 V - 120dB 1 Bidirectional - - SC-70 6 - - - -
New
RS Stock No. 208-5083
Mfr. Part No.TSC2011IYST
SGD1.616
Each (On a Reel of 4000)
units
Single 2.7 → 5.5 V - 90dB 1 Bidirectional - - MiniSO8 8 - - - -
RS Stock No. 168-8818
Mfr. Part No.CS30CL
SGD0.779
Each (On a Reel of 3000)
units
Single 2.8 → 30 V - - 2 Single Ended - Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm -
New
RS Stock No. 208-5084
Mfr. Part No.TSC2011IYST
SGD3.808
Each (In a Pack of 5)
units
Single 2.7 → 5.5 V - 90dB 1 Bidirectional - - MiniSO8 8 - - - -
RS Stock No. 202-4761
Mfr. Part No.TSC2011IDT
SGD3,426.91
1 Reel of 2500
Reel(s)
Single 5.5 V - 85dB 1 Bidirectional - - SO8 8 - - - -
New
RS Stock No. 206-8639
Mfr. Part No.TSC2010IDT
SGD3.182
Each (In a Pack of 5)
units
Single 2.7 → 5.5 V - 115dB 1 - - - SO 8 - - - -
RS Stock No. 920-6311
Mfr. Part No.TSC101BILT
SGD1.03
Each (On a Reel of 3000)
units
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
New
RS Stock No. 215-5538
Mfr. Part No.TSC2010IYDT
SGD3.666
Each (In a Pack of 5)
units
Single 2.7 → 5.5 V ±7V 90dB 1 Bidirectional - - SO8 8 - - - -
New
RS Stock No. 208-5082
Mfr. Part No.TSC2011IYDT
SGD3.808
Each (In a Pack of 5)
units
Single 2.7 → 5.5 V - 90dB 1 Bidirectional - - SO8 8 - - - -
New
RS Stock No. 215-5539
Mfr. Part No.TSC2010IYST
SGD1.598
Each (On a Reel of 4000)
units
Single 2.7 → 5.5 V ±7V 90dB 1 Bidirectional - - MiniSO8 8 - - - -
New
RS Stock No. 206-6086
Mfr. Part No.TSC2010IST
SGD1.415
Each (On a Reel of 4000)
units
Single 2.7 → 5.5 V - - 1 Bidirectional - - 8 8 - - - -