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 189-7273
Référence fabricantMAX4070AUA+
1,599 €
Each (In a Tube of 50)
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 189-7319
Référence fabricantMAX4373FESA+
1,797 €
Each (In a Tube of 100)
Unité
Single 2.7 → 28 V - 85dB 1 Differential 100 μA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
N° de stock RS 190-4330
Référence fabricantMAX4376FAUK+T
1,011 €
Each (On a Reel of 2500)
Unité
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
N° de stock RS 817-6584
Référence fabricantINA220AIDGST
2,344 €
Each (In a Pack of 5)
Unité
Single 3 → 5.5 V - 100dB 1 Bidirectional 1 mA Surface Mount VSSOP 10 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 5.5 V
N° de stock RS 709-7064
Référence fabricantAD8212YRMZ
2,92 €
Each
Unité
Single 9 V, 12 V, 15 V, 18 V, 24 V, 28 V - - 1 - 1.5 mA Surface Mount MSOP 8 3 x 3 x 0.85mm 0.85mm 3mm 65 V
N° de stock RS 412-456
Référence fabricantAD8210YRZ
4,13 €
Each
Unité
Single 5 V - 120 1 Bidirectional - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 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
N° de stock RS 545-7647
Référence fabricantINA196AIDBVT
2,502 €
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 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 190-6422
Référence fabricantMAX4081FASA+
2,024 €
Each (In a Pack of 5)
Unité
Single 4.5 → 76 V - 100dB 1 Voltage 190 μA Surface Mount SO 8 5 x 4 x 1.5mm 1.5mm 5mm 76 V
N° de stock RS 190-6559
Référence fabricantMAX4081SAUA+
2,10 €
Each (In a Pack of 5)
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 202-4761
Référence fabricantTSC2011IDT
1.964,37 €
1 Reel of 2500
Bobine(s)
Single 5.5 V - 85dB 1 Bidirectional - - SO8 8 - - - -
N° de stock RS 189-7296
Référence fabricantMAX4080SAUA+
1,599 €
Each (In a Tube of 50)
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
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 189-8778
Référence fabricantMAX4173TESA+
1,414 €
Each (In a Pack of 10)
Unité
Single 3 → 28 V - 90dB 1 Differential 1 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
N° de stock RS 824-5475
Référence fabricantZXCT1020E5TA
MarqueDiodesZetex
0,905 €
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 168-4959
Référence fabricantINA250A3PW
2,386 €
Each (In a Tube of 90)
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 738-5285
Référence fabricantZXCT1110W5-7
MarqueDiodesZetex
0,754 €
Each (In a Pack of 5)
Unité
- - - - - - - - - - - - - -
Nouveau
N° de stock RS 208-5083
Référence fabricantTSC2011IYST
0,941 €
Each (On a Reel of 4000)
Unité
Single 2.7 → 5.5 V - 90dB 1 Bidirectional - - MiniSO8 8 - - - -
N° de stock RS 190-4305
Référence fabricantMAX4081SASA+
1,625 €
Each (In a Tube of 100)
Unité
Single 4.5 → 76 V - 100dB 1 Voltage 190 μA Surface Mount SO 8 5 x 4 x 1.5mm 1.5mm 5mm 76 V