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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Part Details Brand 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 Width Minimum Operating Supply Voltage Maximum Operating Temperature Minimum Operating Temperature
NCS210RMUTAG ON Semiconductor, Current Sense Amplifier Single Rail to Rail 10-Pin UQFN
  • € 0.57
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ON Semiconductor Single 5 V - 105dB 1 Rail to Rail 80 μA Surface Mount UQFN 10 1.4 x 1.8 x 0.55mm 0.55mm 1.4mm 26 V 1.8mm 2.2 V +125 °C -40 °C
NCS213RSQT2G ON Semiconductor, Current Sense Amplifier Single Rail to Rail 6-Pin SC-70
  • € 0.57
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ON Semiconductor Single 5 V - 100dB 1 Rail to Rail 80 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V 1.35mm 2.2 V +125 °C -40 °C
NCS214RMUTAG ON Semiconductor, Current Sense Amplifier Single Rail to Rail 10-Pin UQFN
  • € 0.57
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ON Semiconductor Single 5 V - 105dB 1 Rail to Rail 80 μA Surface Mount UQFN 10 1.4 x 1.8 x 0.55mm 0.55mm 1.4mm 26 V 1.8mm 2.2 V +125 °C -40 °C
NCS199A1RSQT2G ON Semiconductor, Current Sense Amplifier Single Rail to Rail 6-Pin SC-70
  • € 0.57
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ON Semiconductor Single 5 V - 100dB 1 Rail to Rail 80 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V 1.35mm 2.2 V +125 °C -40 °C
NCS199A1RSQT2G ON Semiconductor, Current Sense Amplifier Single Rail to Rail 6-Pin SC-70 ON Semiconductor Single 5 V - 100dB 1 Rail to Rail 80 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V 1.35mm 2.2 V +125 °C -40 °C
NCS210RMUTAG ON Semiconductor, Current Sense Amplifier Single Rail to Rail 10-Pin UQFN ON Semiconductor Single 5 V - 105dB 1 Rail to Rail 80 μA Surface Mount UQFN 10 1.4 x 1.8 x 0.55mm 0.55mm 1.4mm 26 V 1.8mm 2.2 V +125 °C -40 °C
NCS213RSQT2G ON Semiconductor, Current Sense Amplifier Single Rail to Rail 6-Pin SC-70 ON Semiconductor Single 5 V - 100dB 1 Rail to Rail 80 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V 1.35mm 2.2 V +125 °C -40 °C
NCS214RMUTAG ON Semiconductor, Current Sense Amplifier Single Rail to Rail 10-Pin UQFN ON Semiconductor Single 5 V - 105dB 1 Rail to Rail 80 μA Surface Mount UQFN 10 1.4 x 1.8 x 0.55mm 0.55mm 1.4mm 26 V 1.8mm 2.2 V +125 °C -40 °C
AD8210YRZ-REEL7 Analog Devices, Current Shunt Monitor Single Single Ended 8-Pin SOIC
  • € 5.60
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Analog Devices Single 5 V - 100dB 1 Single Ended - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V 4mm 4.5 V +125 °C -40 °C
AD8418ABRMZ Analog Devices, Current Sense Amplifier Single Buffered 8-Pin MSOP Analog Devices Single 2.7 → 5.5 V - 90dB 1 Buffered - Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V 3.2mm 2.7 V +125 °C -40 °C
AD8417WHRMZ Analog Devices, Current Sense Amplifier Single Buffered 8-Pin MSOP Analog Devices Single 2.7 → 5.5 V - 90dB 1 Buffered - Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V 3.2mm 2.7 V +150 °C -40 °C
AD8210YRZ-REEL7 Analog Devices, Current Shunt Monitor Single Single Ended 8-Pin SOIC Analog Devices Single 5 V - 100dB 1 Single Ended - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V 4mm 4.5 V +125 °C -40 °C
AD8417WHRMZ Analog Devices, Current Sense Amplifier Single Buffered 8-Pin MSOP Analog Devices Single 2.7 → 5.5 V - 90dB 1 Buffered - Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V 3.2mm 2.7 V +150 °C -40 °C
AD8418ABRMZ Analog Devices, Current Sense Amplifier Single Buffered 8-Pin MSOP Analog Devices Single 2.7 → 5.5 V - 90dB 1 Buffered - Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V 3.2mm 2.7 V +125 °C -40 °C
IR2172SPBF Infineon, Current Sense Amplifier Single Open Drain 8-Pin SOIC Infineon Single 5 V - - 1 Open Drain 2 mA Surface Mount SOIC 8 5 x 4 x 1.75mm 1.75mm 5mm 5 V 4mm -5 V +125 °C -40 °C
LT6100IMS8#PBF Linear Technology, Current Sense Amplifier Single Differential 8-Pin MSOP Linear Technology Single 2.7 → 36 V - 100dB 1 Differential 145 μA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 36 V 3mm 2.7 V +125 °C -40 °C
LTC6102IMS8#PBF Linear Technology, Current Sense Amplifier Single Rail to Rail 8-Pin MSOP Linear Technology Single 5 → 100 V - - 1 Rail to Rail 650 μA Surface Mount MSOP 8 3 x 3 x 0.9984mm 0.998mm 3mm 100 V 3mm 5 V +85 °C -40 °C
AD8418BRMZ Analog Devices, Current Sense Amplifier Single Bidirectional 8-Pin MSOP Analog Devices Single 5 V - 90dB 1 Bidirectional 130 μA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V 3.2mm 2.7 V +125 °C -40 °C
ZXCT1022E5TA DiodesZetex, Current Monitor DiodesZetex - - - - - - - - - - - - - - - - - -
AD8418ABRMZ-RL Analog Devices, Current Sense Amplifier Single Buffered 8-Pin MSOP Analog Devices Single 5 V - 90dB 1 Buffered 4.1 mA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V 3.2mm 2.7 V +125 °C -40 °C
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