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. 860-7505
Mfr. Part No.CS30AL
$1.928
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. 168-8815
Mfr. Part No.CS30AL
$0.847
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 -
RS Stock No. 426-190
Mfr. Part No.TSC101AILT
$1.996
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. 920-6317
Mfr. Part No.TSC101AILT
$0.88
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. 165-6638
Mfr. Part No.TSC1031IPT
$1.748
Each (On a Reel of 4000)
units
Dual, Single 2.9 → 70 V -2.1 → 65V 90dB 1 Buffered 480 μA Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 1.05mm 4.5mm 5.5 V
RS Stock No. 203-3517
Mfr. Part No.TSC213ICT
$1.985
Each (In a Pack of 10)
units
Single 2.7 V, 26 V - 120dB 1 Bidirectional - - SC-70 6 - - - -
RS Stock No. 208-5082
Mfr. Part No.TSC2011IYDT
$4.334
Each (In a Pack of 5)
units
Single 2.7 → 5.5 V - 90dB 1 Bidirectional - - SO8 8 - - - -
New
RS Stock No. 215-5538
Mfr. Part No.TSC2010IYDT
$4.082
Each (In a Pack of 5)
units
Single 2.7 → 5.5 V ±7V 90dB 1 Bidirectional - - SO8 8 - - - -
RS Stock No. 202-4811
Mfr. Part No.TSC2011IDT
$3.694
Each (In a Pack of 5)
units
Single 5.5 V - 85dB 1 Bidirectional - - SO8 8 - - - -
New
RS Stock No. 215-5539
Mfr. Part No.TSC2010IYST
$1.779
Each (On a Reel of 4000)
units
Single 2.7 → 5.5 V ±7V 90dB 1 Bidirectional - - MiniSO8 8 - - - -
RS Stock No. 206-8640
Mfr. Part No.TSC2010IST
$3.622
Each (In a Pack of 5)
units
Single 2.7 → 5.5 V - - 1 Bidirectional - - 8 8 - - - -
RS Stock No. 203-3516
Mfr. Part No.TSC213ICT
$0.923
Each (On a Reel of 3000)
units
Single 2.7 V, 26 V - 120dB 1 Bidirectional - - SC-70 6 - - - -
New
RS Stock No. 210-9079
Mfr. Part No.TSC2012IYST
$1.888
Each (On a Reel of 4000)
units
Single 5.5 V - 115 1 Rail to Rail - - Mini SO-8 8 - - - -
RS Stock No. 168-7749
Mfr. Part No.TSC102IPT
$0.98
Each (On a Reel of 4000)
units
Single 2.8 → 30 V - 90dB 1 - 700 μA Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 1.05mm 4.5mm 5.5 V
RS Stock No. 203-3511
Mfr. Part No.TSC2012IDT
$1.526
Each (On a Reel of 2500)
units
Single 2.7 V, 5.5 V - 115dB 1 Bidirectional - - SO8 8 - - - -
RS Stock No. 206-6084
Mfr. Part No.TSC2010IDT
$1.611
Each (On a Reel of 2500)
units
Single 2.7 → 5.5 V - 115dB 1 - - - SO 8 - - - -
RS Stock No. 795-9259
Mfr. Part No.TSC103IPT
$3.555
Each (In a Pack of 2)
units
Dual, Single 2.9 → 70 V -2.1 → 65V 90dB 1 Buffered 480 μA Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 1.05mm 4.5mm 5.5 V
New
RS Stock No. 215-5542
Mfr. Part No.TSC210ICT
$0.896
Each (On a Reel of 3000)
units
Single 2.7 → 26 V ±26V 105dB 1 Bidirectional - - SC-70 6 - - - -
RS Stock No. 166-0789
Mfr. Part No.TSC101CILT
$0.941
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. 202-4761
Mfr. Part No.TSC2011IDT
$4,341.65
1 Reel of 2500
Reel(s)
Single 5.5 V - 85dB 1 Bidirectional - - SO8 8 - - - -