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 761-8894
Référence fabricantLT6105IMS8#PBF
2,36 €
Each
Unité
Single 36 V - 90dB 1 Differential 0.35 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 36 V
N° de stock RS 545-7647
Référence fabricantINA196AIDBVT
3,002 €
Each (In a Pack of 5)
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 190-1271
Référence fabricantMAX4080TAUA+
2,298 €
Each (In a Pack of 5)
Unité
Single 4.5 → 76 V - 100dB 1 Rail to Rail 0.19 mA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 76 V
N° de stock RS 178-4576
Référence fabricantNCS213RSQT2G
0,734 €
Each (In a Pack of 50)
Unité
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
N° de stock RS 764-8744
Référence fabricantAD8218BRMZ
2,28 €
Each
Unité
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
N° de stock RS 461-6558
Référence fabricantINA139NA/250
2,06 €
Each
Unité
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 40 V
N° de stock RS 210-2051
Référence fabricantTSC2012IYDT
2,48 €
Each (In a Pack of 5)
Unité
Single 5.5 V - 115dB 1 Bidirectional - - SO8 8 - - - -
N° de stock RS 190-4302
Référence fabricantMAX4080SAUA+T
1,43 €
Each (On a Reel of 2500)
Unité
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
N° de stock RS 166-0789
Référence fabricantTSC101CILT
0,511 €
Each (On a Reel of 3000)
Unité
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
N° de stock RS 922-8238
Référence fabricantZXCT1107SA-7
MarqueDiodesZetex
0,37 €
Each (On a Reel of 3000)
Unité
- - - - - - - - - - - - - -
N° de stock RS 190-6314
Référence fabricantMAX4173TEUT+T
2,744 €
Each (In a Pack of 5)
Unité
Single 3 → 28 V - 90 (Typ.)dB 1 Voltage 1 mA Surface Mount SOT-23 6 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V
N° de stock RS 189-7368
Référence fabricantMAX9929FAUA+
1,736 €
Each (In a Tube of 50)
Unité
Single - - 87dB 2 Bidirectional, Unidirectional 20 μA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 5.5 V
N° de stock RS 203-3516
Référence fabricantTSC213ICT
0,569 €
Each (On a Reel of 3000)
Unité
Single 2.7 V, 26 V - 120dB 1 Bidirectional - - SC-70 6 - - - -
N° de stock RS 185-8086
Référence fabricantNCS210RSQT2G
0,264 €
Each (On a Reel of 3000)
Unité
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
N° de stock RS 122-3297
Référence fabricantZXCT1020E5TA
MarqueDiodesZetex
0,59 €
Each (On a Reel of 3000)
Unité
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
N° de stock RS 824-5475
Référence fabricantZXCT1020E5TA
MarqueDiodesZetex
1,086 €
Each (In a Pack of 10)
Unité
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
N° de stock RS 121-7248
Référence fabricantISL28022FRZ-T7A
MarqueIntersil
3,33 €
Each (In a Pack of 2)
Unité
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
N° de stock RS 189-9253
Référence fabricantMAX4070AUA+
2,528 €
Each (In a Pack of 5)
Unité
Single 2.7 → 24 V - 100dB 1 Rail to Rail 0.25 mA Surface Mount μMAX 8 3.05 x 3.05 x 0.95mm 0.95mm 3.05mm 24 V
N° de stock RS 133-0174
Référence fabricantINA250A3PW
3,37 €
Each (In a Pack of 2)
Unité
Single - - 106dB 1 Analogue, Bidirectional ±15 A Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 36 V
N° de stock RS 186-1444
Référence fabricantNCS211RMUTAG
0,542 €
Each (In a Pack of 10)
Unité
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