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 185-8087
Tillv. art.nrNCS214RSQT2G
VarumärkeON Semiconductor
2,612 kr
Each (On a Reel of 3000)
Enheter
Single 2.2 → 26 V - 105dB 1 Rail to Rail 60 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
Nytt
RS-artikelnummer 190-6365
Tillv. art.nrMAX4376TAUK+T
VarumärkeMaxim Integrated
28,524 kr
Each (In a Pack of 5)
Enheter
Single 3 → 28 V - 90dB 1 Buffered 2.2 mA Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V
RS-artikelnummer 169-0202
Tillv. art.nrSI8920AC-IP
VarumärkeSilicon Labs
38,051 kr
Each (In a Tube of 50)
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Single 3 → 5.5 V - - 2 Differential 5.5 mA Through Hole DIP 8 9.9 x 6.6 x 3.44mm 3.44mm 9.9mm 5.5 V
RS-artikelnummer 122-3297
Tillv. art.nrZXCT1020E5TA
VarumärkeDiodesZetex
4,763 kr
Each (On a Reel of 3000)
Enheter
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 170-8124
Tillv. art.nrISL28022FRZ-T7A
VarumärkeIntersil
17,643 kr
Each (On a Reel of 250)
Enheter
Single 3.3 V - 110dB 2 Open Drain 0.7 mA Surface Mount QFN 16 3 x 3 x 0.85mm 0.85mm 3mm 5.5 V
Nytt
RS-artikelnummer 192-2361
Tillv. art.nrMAX9920ASA+
VarumärkeMaxim Integrated
14,394 kr
Each (In a Pack of 5)
Enheter
Single 4.5 → 5.5 V - 72dB 1 Rail to Rail 2.2 mA Surface Mount SOIC 8 4.98 x 3.99 x 1.58mm 1.58mm 4.98mm 5.5 V
RS-artikelnummer 851-6828
Tillv. art.nrLT6108IMS8-2#PBF
VarumärkeAnalog Devices
32,736 kr
Each (In a Pack of 5)
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Single 2.7 60 V - 125dB 1 Open Drain 450 μA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 60 V
Nytt
RS-artikelnummer 191-5281
Tillv. art.nrMAX4373FEUA+
VarumärkeMaxim Integrated
21,937 kr
Each (In a Tube of 50)
Enheter
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-artikelnummer 820-9457
Tillv. art.nrAD8213WYRMZ
VarumärkeAnalog Devices
31,40 kr
Each (In a Pack of 2)
Enheter
Single 5 V - 100dB 2 Buffered 4.5 mA Surface Mount MSOP 10 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 5.5 V
RS-artikelnummer 912-9914
Tillv. art.nrAD8218BRMZ
VarumärkeAnalog Devices
17,973 kr
Each (In a Tube of 50)
Enheter
Single 4 → 80 V - 90dB 1 Rail to Rail 60 μA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 80 V
RS-artikelnummer 461-6586
Tillv. art.nrINA169NA/250
VarumärkeTexas Instruments
22,54 kr
Each
Enheter
Single 3 V, 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V - 100dB 1 - - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 1.15mm 2.9mm 60 V
RS-artikelnummer 545-7653
Tillv. art.nrINA197AIDBVT
VarumärkeTexas Instruments
22,686 kr
Each (In a Pack of 5)
Enheter
Single 3 V, 5 V, 9 V, 12 V, 15 V - 80dB 1 - - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 1.15mm 2.9mm 18 V
Nytt
RS-artikelnummer 190-4332
Tillv. art.nrMAX4378TAUD+
VarumärkeMaxim Integrated
21,663 kr
Each (In a Tube of 96)
Enheter
- 3 28 V ±8V 90dB 1 Buffered 2.2 mA Surface Mount TSSOP 14 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm 28 V
RS-artikelnummer 186-1444
Tillv. art.nrNCS211RMUTAG
VarumärkeON Semiconductor
5,997 kr
Each (In a Pack of 10)
Enheter
Single 2.2 → 26 V - 105dB 1 Rail to Rail 60 μA Surface Mount UQFN 10 1.4 x 1.8 x 0.55mm 0.55mm 1.4mm 26 V
Nytt
RS-artikelnummer 190-4306
Tillv. art.nrMAX4081SAUA+
VarumärkeMaxim Integrated
19,606 kr
Each (In a Tube of 50)
Enheter
Single 4.5 76 V - 100dB 1 Voltage 190 μA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 76 V
Nytt
RS-artikelnummer 190-6559
Tillv. art.nrMAX4081SAUA+
VarumärkeMaxim Integrated
22,152 kr
Each (In a Pack of 5)
Enheter
Single 4.5 → 76 V - 100dB 1 Voltage 190 μA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 76 V
RS-artikelnummer 860-7505
Tillv. art.nrCS30AL
VarumärkeSTMicroelectronics
4,366 kr
Each (In a Pack of 5)
Enheter
Single 2.8 → 30 V - - 2 Single Ended - Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm -
Nytt
RS-artikelnummer 190-6445
Tillv. art.nrMAX9938TEUK+T
VarumärkeMaxim Integrated
17,852 kr
Each (In a Pack of 5)
Enheter
Single 1.6 → 28 V - 94dB 1 Voltage 2.5 μA Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V
RS-artikelnummer 121-9343
Tillv. art.nrLMP8640MKE-F/NOPB
VarumärkeTexas Instruments
8,464 kr
Each (On a Reel of 250)
Enheter
Dual - ±12 V, ±2.7 V, ±5 V 103dB 1 Buffered 800 μA Surface Mount SOT-23 6 3.05 x 1.75 x 1mm 1mm 3.05mm 12 V
RS-artikelnummer 162-8163
Tillv. art.nrINA199A2DCKT
VarumärkeTexas Instruments
5,016 kr
Each (On a Reel of 250)
Enheter
Single 2.7 → 26 V - 100dB 1 Bidirectional 100 μA Surface Mount SC-70 6 2.15 x 1.4 x 1mm 1mm 2.15mm 26 V
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