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 189-0442
Référence fabricantNCS211RSQT2G
0,612 €
Each (In a Pack of 25)
Unité
Single 5 V - 105dB 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 191-4007
Référence fabricantMAX9919FASA+
1,36 €
Each (In a Tube of 100)
Unité
Single 4.5 → 5.5 V - 96dB 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
N° de stock RS 168-8817
Référence fabricantCS30BL
0,439 €
Each (On a Reel of 3000)
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 190-6410
Référence fabricantMAX4080TASA+T
1,588 €
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 796-8912
Référence fabricantAD8211YRJZ-R2
2,334 €
Each (In a Pack of 5)
Unité
Single 5 V - 100dB 1 Buffered 2 mA Surface Mount SOT-23 5 3 x 1.7 x 1.3mm 1.3mm 3mm 5.5 V
N° de stock RS 189-7318
Référence fabricantMAX4372FESA+
1,273 €
Each (In a Tube of 100)
Unité
Single 2.7 → 28 V - - 1 Differential 0.06 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
N° de stock RS 190-4332
Référence fabricantMAX4378TAUD+
2,013 €
Each (In a Tube of 96)
Unité
Quad 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
N° de stock RS 162-8172
Référence fabricantINA3221AIRGVT
2,43 €
Each (On a Reel of 250)
Unité
Single 2.7 → 5.5 V - 110dB 1 Open Drain 450 μA Surface Mount VQFN 16 4.15 x 4.15 x 0.95mm 0.95mm 4.15mm 5.5 V
N° de stock RS 203-3517
Référence fabricantTSC213ICT
1,01 €
Each (In a Pack of 10)
Unité
Single 2.7 V, 26 V - 120dB 1 Bidirectional - - SC-70 6 - - - -
N° de stock RS 884-6775
Référence fabricantLTC6102HMS8#PBF
4,745 €
Each (In a Pack of 2)
Unité
Single 12 V - - 1 - 675 μA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 60 V
N° de stock RS 159-9339
Référence fabricantAD8211YRJZ-R2
1,388 €
Each (On a Reel of 250)
Unité
Single 5 V - 100dB 1 Buffered 2 mA Surface Mount SOT-23 5 3 x 1.7 x 1.3mm 1.3mm 3mm 5.5 V
N° de stock RS 121-9032
Référence fabricantINA170EA/250
2,108 €
Each (On a Reel of 250)
Unité
Single 3 V, 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V - 100dB 1 - - Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm 40 V
N° de stock RS 202-4811
Référence fabricantTSC2011IDT
1,778 €
Each (In a Pack of 5)
Unité
Single 5.5 V - 85dB 1 Bidirectional - - SO8 8 - - - -
N° de stock RS 191-3435
Référence fabricantMAX9938HEUK+T
0,988 €
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 189-8859
Référence fabricantMAX4372FEUK+T
1,61 €
Each (In a Pack of 5)
Unité
Single 2.7 → 28 V - - 1 Differential 0.06 mA Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V
N° de stock RS 922-8232
Référence fabricantZXCT1109SA-7
MarqueDiodesZetex
0,302 €
Each (On a Reel of 3000)
Unité
- - - - - - - - - - - - - -
N° de stock RS 169-0202
Référence fabricantSI8920AC-IP
MarqueSilicon Labs
2,852 €
Each (In a Tube of 50)
Unité
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
N° de stock RS 661-3352
Référence fabricantINA200AIDGKT
2,378 €
Each (In a Pack of 5)
Unité
- - - - - - - Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm -
N° de stock RS 820-9750
Référence fabricantAD8418AWBRMZ
2,52 €
Each (In a Pack of 5)
Unité
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
N° de stock RS 190-6571
Référence fabricantMAX4081TASA+
2,252 €
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