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. 730-0556
FabrikantnummerINA219BIDCNT
€ 2,51
Each
Aantal stuks
- - - - - - - Surface Mount SOT-23 8 3 x 1.75 x 1.3mm 1.3mm 3mm -
RS-stocknr. 461-6558
FabrikantnummerINA139NA/250
€ 1,76
Each
Aantal stuks
Single 12 V, 15 V, 18 V, 24 V, 28 V, 3 V, 5 V, 9 V - 100dB 1 - - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 1.15mm 2.9mm 40 V
RS-stocknr. 738-5250
FabrikantnummerZXCT1082E5TA
FabrikantDiodesZetex
€ 1,312
Each (In a Pack of 5)
Aantal stuks
Single 2.7 → 60 V - 80dB - - - - - - - - - -
RS-stocknr. 155-7545
FabrikantnummerLTC4151IDD#PBF
FabrikantAnalog Devices
€ 4,59
Each (In a Tube of 141)
Aantal stuks
Single 4.5 → 5.5 V - - 1 Open Collector 1.7 mA Surface Mount DFN 10 3 x 3 x 0.7mm 0.7mm 3mm 80 V
RS-stocknr. 822-5844
FabrikantnummerLT1999IMS8-20#PBF
FabrikantAnalog Devices
€ 4,555
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
RS-stocknr. 761-8894
FabrikantnummerLT6105IMS8#PBF
FabrikantAnalog Devices
€ 2,40
Each
Aantal stuks
Single 36 V - 90dB 1 Differential 0.35 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 36 V
RS-stocknr. 154-920
FabrikantnummerZXCT1009FTA
FabrikantDiodesZetex
€ 0,82
Each (In a Pack of 5)
Aantal stuks
- 2.5 → 20 V - - - - - Surface Mount SOT-23 3 3.05 x 1.4 x 1mm 1mm 3.05mm -
RS-stocknr. 922-3265
FabrikantnummerINA271AID
€ 2,32
Each (In a Tube of 75)
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 121-9269
FabrikantnummerINA219BIDCNT
€ 1,578
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. 835-3793
FabrikantnummerAD8418ABRMZ-RL
FabrikantAnalog Devices
€ 2,433
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. 661-2491
FabrikantnummerINA271AID
€ 2,49
Each
Aantal stuks
Single 12 V, 15 V, 3 V, 5 V, 9 V - 80dB 1 - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 1.58mm 4.9mm 18 V
RS-stocknr. 823-0079
FabrikantnummerLTC6102IMS8#PBF
FabrikantAnalog Devices
€ 4,185
Each (In a Pack of 2)
Aantal stuks
Single 5 → 100 V - - 1 Rail to Rail 650 μA Surface Mount MSOP 8 3 x 3 x 0.9984mm 0.998mm 3mm 100 V
RS-stocknr. 709-4522
FabrikantnummerINA211AIDCKT
€ 0,63
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. 122-0315
FabrikantnummerZXCT1082E5TA
FabrikantDiodesZetex
€ 0,636
Each (On a Reel of 3000)
Aantal stuks
- 2.7 to 60 V - 80dB - - - - - - - - - -
RS-stocknr. 461-6564
FabrikantnummerINA168NA/250
€ 2,24
Each
Aantal stuks
Single 12 V, 15 V, 18 V, 24 V, 28 V, 3 V, 5 V, 9 V - 100dB 1 - - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 1.15mm 2.9mm 36 V
RS-stocknr. 860-7514
FabrikantnummerCS30BL
€ 1,102
Each (In a Pack of 5)
Aantal stuks
Single 2.8 → 30 V - - 2 Single Ended - Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm -
RS-stocknr. 160-9876
FabrikantnummerAD8418ABRMZ-RL
FabrikantAnalog Devices
€ 1,317
Each (On a Reel of 3000)
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. 921-5087
FabrikantnummerINA219AIDCNT
€ 1,437
Each (On a Reel of 250)
Aantal stuks
- - - - - - - Surface Mount SOT-23 8 2.9 x 1.63 x 1.1mm 1.1mm 2.9mm -
RS-stocknr. 168-8817
FabrikantnummerCS30BL
€ 0,42
Each (On a Reel of 3000)
Aantal stuks
Single 2.8 → 30 V - - 2 Single Ended - Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm -
RS-stocknr. 100-3849
FabrikantnummerINA139NA/250
€ 1,206
Each (On a Reel of 250)
Aantal stuks
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
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