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 Prix 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
N° de stock RS 189-8799
Référence fabricantMAX4080TASA+
1,73 €
Each (In a Pack of 5)
Unité
Single 4.5 → 76 V - 100dB 1 Rail to Rail 0.19 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 76 V
N° de stock RS 185-8847
Référence fabricantNCS199A3RSQT2G
0,394 €
Each (In a Pack of 10)
Unité
Single 2.2 → 26 V - 100dB 1 Rail to Rail 60 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
N° de stock RS 919-9550
Référence fabricantLTC6101BIS5#TRMPBF
2,143 €
Each (On a Reel of 500)
Unité
Single 4 → 60 V 4 → 60V - 1 Unidirectional 0.64 mA Surface Mount TSOT-23 5 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm 60 V
N° de stock RS 190-6625
Référence fabricantMAX9634FEUK+T
1,088 €
Each (In a Pack of 5)
Unité
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
N° de stock RS 860-7505
Référence fabricantCS30AL
1,038 €
Each (In a Pack of 5)
Unité
Single 2.8 → 30 V - - 2 Single Ended - Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm -
N° de stock RS 203-3511
Référence fabricantTSC2012IDT
0,786 €
Each (On a Reel of 2500)
Unité
Single 2.7 V, 5.5 V - 115dB 1 Bidirectional - - SO8 8 - - - -
N° de stock RS 121-8921
Référence fabricantINA194AIDBVT
1,483 €
Each (On a Reel of 250)
Unité
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
N° de stock RS 190-4344
Référence fabricantMAX44284HAUT+T
0,926 €
Each (On a Reel of 2500)
Unité
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
N° de stock RS 795-9176
Référence fabricantTSC102IPT
1,08 €
Each (In a Pack of 2)
Unité
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
N° de stock RS 786-1322
Référence fabricantMAX9611AUB+
2,11 €
Each (In a Pack of 2)
Unité
Single 2.7 → 5.5 V - 106dB 1 Rail to Rail 2.6 mA Surface Mount μMAX 10 3.05 x 3.05 x 0.95mm 0.95mm 3.05mm 6 V
Nouveau
N° de stock RS 215-5537
Référence fabricantTSC2010IYDT
0,931 €
Each (On a Reel of 2500)
Unité
Single 2.7 → 5.5 V ±7V 90dB 1 Bidirectional - - SO8 8 - - - -
N° de stock RS 190-4298
Référence fabricantMAX4071AUA+
1,414 €
Each (In a Tube of 50)
Unité
Single 2.7 → 24 V - 100dB 1 Bidirectional 250 μA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 24 V
N° de stock RS 146-1151
Référence fabricantMAX4172ESA+
2,176 €
Each (In a Tube of 100)
Unité
Single 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V - - 1 - 1.6 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 32 V
N° de stock RS 860-7514
Référence fabricantCS30BL
1,038 €
Each (In a Pack of 5)
Unité
Single 2.8 → 30 V - - 2 Single Ended - Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm -
N° de stock RS 203-3514
Référence fabricantTSC2012IST
0,786 €
Each (On a Reel of 4000)
Unité
Single 2.7 V, 5.5 V - 115dB 1 Bidirectional - - MiniSO8 8 - - - -
N° de stock RS 190-4374
Référence fabricantMAX9634FEUK+T
0,691 €
Each (On a Reel of 2500)
Unité
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
N° de stock RS 806-7907
Référence fabricantAD8219BRMZ
2,34 €
Each (In a Pack of 2)
Unité
Single -0.3 → 85 V - 94dB 1 Unidirectional 130 Bias μA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 80 V
N° de stock RS 190-4314
Référence fabricantMAX4172EUA+
2,404 €
Each (In a Tube of 50)
Unité
Single 3 → 32 V - - 1 Unidirectional 1.6 mA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 32 V
N° de stock RS 709-4522
Référence fabricantINA211AIDCKT
0,58 €
Each
Unité
Single 3 V, 5 V, 9 V, 12 V, 15 V, 18 V, 24 V - 105dB 1 - - Surface Mount SC-70 6 2 x 1.25 x 0.9mm 0.9mm 2mm 26 V
Nouveau
N° de stock RS 208-8512
Référence fabricantINA260AIPW
4,995 €
Each (In a Pack of 2)
Unité
Single 2.7-V → 5.5-V V Not required - 1 - - - TSSOP 16 - - - -