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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Omschrijving Prijs 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
RS-stocknr. 162-6300
FabrikantnummerLMP8601MA/NOPB
2,91 €
Each (In a Tube of 95)
Aantal stuks
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
RS-stocknr. 761-6328
FabrikantnummerLMP8601MA/NOPB
3,44 €
Each
Aantal stuks
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
RS-stocknr. 169-0204
FabrikantnummerSI8920BC-IP
FabrikantSilicon Labs
2,386 €
Each (In a Tube of 50)
Aantal stuks
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
RS-stocknr. 901-3976
FabrikantnummerSi8920BC-IP
FabrikantSilicon Labs
2,425 €
Each (In a Pack of 2)
Aantal stuks
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
RS-stocknr. 121-9269
FabrikantnummerINA219BIDCNT
1,413 €
Each (On a Reel of 250)
Aantal stuks
- - - - - - - Surface Mount SOT-23 8 3 x 1.75 x 1.3mm 1.3mm 3mm -
RS-stocknr. 921-2940
FabrikantnummerINA282AID
2,337 €
Each (In a Tube of 75)
Aantal stuks
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
RS-stocknr. 817-6603
FabrikantnummerINA282AID
2,806 €
Each (In a Pack of 5)
Aantal stuks
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
RS-stocknr. 730-0556
FabrikantnummerINA219BIDCNT
2,30 €
Each
Aantal stuks
- - - - - - - Surface Mount SOT-23 8 3 x 1.75 x 1.3mm 1.3mm 3mm -
RS-stocknr. 145-7636
FabrikantnummerINA219AID
2,072 €
Each (In a Tube of 75)
Aantal stuks
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
RS-stocknr. 817-6580
FabrikantnummerINA219AID
2,458 €
Each (In a Pack of 5)
Aantal stuks
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
RS-stocknr. 820-9390
FabrikantnummerAD8418BRMZ
FabrikantAnalog Devices
2,264 €
Each (In a Pack of 5)
Aantal stuks
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
RS-stocknr. 709-9117
FabrikantnummerINA214AIDCKT
1,22 €
Each
Aantal stuks
Single 12 V, 15 V, 18 V, 24 V, 3 V, 5 V, 9 V - 105dB 1 - - Surface Mount SC-70 6 2 x 1.25 x 0.9mm 0.9mm 2mm 26 V
RS-stocknr. 168-7760
FabrikantnummerTSC103IPT
0,732 €
Each (On a Reel of 4000)
Aantal stuks
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
RS-stocknr. 921-5305
FabrikantnummerINA226AIDGST
1,938 €
Each (On a Reel of 250)
Aantal stuks
- - - - - - - Surface Mount MSOP 10 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm -
RS-stocknr. 795-9259
FabrikantnummerTSC103IPT
0,75 €
Each (In a Pack of 2)
Aantal stuks
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
RS-stocknr. 742-2889
FabrikantnummerINA226AIDGST
2,75 €
Each
Aantal stuks
- - - - - - - Surface Mount MSOP 10 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm -
RS-stocknr. 820-9397
FabrikantnummerAD8418WBRMZ
FabrikantAnalog Devices
2,356 €
Each (In a Pack of 5)
Aantal stuks
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
RS-stocknr. 835-3793
FabrikantnummerAD8418ABRMZ-RL
FabrikantAnalog Devices
2,50 €
Each (In a Pack of 3)
Aantal stuks
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
RS-stocknr. 162-6303
FabrikantnummerLMP8603MA/NOPB
1,784 €
Each (In a Tube of 95)
Aantal stuks
Single 5 V - 80dB 1 Bidirectional, Differential, Rail to Rail, Unidirectional 1.3 mA Surface Mount SOIC 8 3 x 3 x 0.86mm 0.86mm 3mm 5.5 V
RS-stocknr. 822-5844
FabrikantnummerLT1999IMS8-20#PBF
FabrikantAnalog Devices
4,38 €
Each (In a Pack of 2)
Aantal stuks
Single 4.5 → 5.5 V - 80dB 1 Buffered, Rail to Rail 7.1 mA Surface Mount MSOP 8 3 x 3 x 0.9984mm 0.998mm 3mm 5.5 V
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