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 761-6328
Référence fabricantLMP8601MA/NOPB
3,10 €
Each
Unité
Single 5 V - 80dB 1 Bidirectional, Differential, Rail to Rail, Unidirectional 1.3 mA Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 1.45mm 4.9mm 5.5 V
N° de stock RS 162-6300
Référence fabricantLMP8601MA/NOPB
2,603 €
Each (In a Tube of 95)
Unité
Single 5 V - 80dB 1 Bidirectional, Differential, Rail to Rail, Unidirectional 1.3 mA Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 1.45mm 4.9mm 5.5 V
N° de stock RS 169-0204
Référence fabricantSI8920BC-IP
MarqueSilicon Labs
2,598 €
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 901-3976
Référence fabricantSi8920BC-IP
MarqueSilicon Labs
3,495 €
Each (In a Pack of 2)
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 817-6603
Référence fabricantINA282AID
3,094 €
Each (In a Pack of 5)
Unité
Single 2.7 → 18 V - 120dB 1 Bidirectional 900 μA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 18 V
N° de stock RS 730-0556
Référence fabricantINA219BIDCNT
2,31 €
Each
Unité
- - - - - - - Surface Mount SOT-23 8 3 x 1.75 x 1.3mm 1.3mm 3mm -
N° de stock RS 921-2940
Référence fabricantINA282AID
2,607 €
Each (In a Tube of 75)
Unité
Single 2.7 → 18 V - 120dB 1 Bidirectional 900 μA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 18 V
N° de stock RS 121-9269
Référence fabricantINA219BIDCNT
1,578 €
Each (On a Reel of 250)
Unité
- - - - - - - Surface Mount SOT-23 8 3 x 1.75 x 1.3mm 1.3mm 3mm -
N° de stock RS 145-7636
Référence fabricantINA219AID
1,876 €
Each (In a Tube of 75)
Unité
Single 3 → 5.5 V - 100dB 1 Bidirectional 1 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V
N° de stock RS 817-6580
Référence fabricantINA219AID
2,176 €
Each (In a Pack of 5)
Unité
Single 3 → 5.5 V - 100dB 1 Bidirectional 1 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V
N° de stock RS 160-8581
Référence fabricantAD8418BRMZ
1,725 €
Each (In a Tube of 50)
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 820-9390
Référence fabricantAD8418BRMZ
2,126 €
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 709-9117
Référence fabricantINA214AIDCKT
1,32 €
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
N° de stock RS 921-5305
Référence fabricantINA226AIDGST
1,938 €
Each (On a Reel of 250)
Unité
- - - - - - - Surface Mount MSOP 10 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm -
N° de stock RS 742-2889
Référence fabricantINA226AIDGST
2,78 €
Each
Unité
- - - - - - - Surface Mount MSOP 10 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm -
N° de stock RS 795-9259
Référence fabricantTSC103IPT
2,23 €
Each (In a Pack of 2)
Unité
Dual, Single 2.9 → 70 V -2.1 → 65V 90dB 1 Buffered 480 μA Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 1.05mm 4.5mm 5.5 V
N° de stock RS 820-9397
Référence fabricantAD8418WBRMZ
2,296 €
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 145-6632
Référence fabricantAD8418WBRMZ
1,833 €
Each (In a Tube of 50)
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 168-7760
Référence fabricantTSC103IPT
1,304 €
Each (On a Reel of 4000)
Unité
Dual, Single 2.9 → 70 V -2.1 → 65V 90dB 1 Buffered 480 μA Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 1.05mm 4.5mm 5.5 V
N° de stock RS 835-3793
Référence fabricantAD8418ABRMZ-RL
2,433 €
Each (In a Pack of 3)
Unité
Single 5 V - 90dB 1 Buffered 4.1 mA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V