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. 764-8744
FabrikantnummerAD8218BRMZ
FabrikantAnalog Devices
2,31 €
Each
Aantal stuks
Single 4 → 80 V - 90dB 1 Rail to Rail 60 μA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 80 V
RS-stocknr. 819-7294
FabrikantnummerAD8213YRMZ
FabrikantAnalog Devices
4,41 €
Each (In a Pack of 2)
Aantal stuks
Single 5 V - 100dB 2 Buffered 3.7 mA Surface Mount MSOP 10 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 5.5 V
RS-stocknr. 423-478
FabrikantnummerLTC6104CMS8#PBF
FabrikantAnalog Devices
3,10 €
Each
Aantal stuks
Single 12 V, 15 V, 18 V, 24 V, 28 V, 5 V, 9 V - - 1 - 1.04 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 60 V
RS-stocknr. 190-4331
FabrikantnummerMAX4376TAUK+T
FabrikantMaxim Integrated
1,037 €
Each (On a Reel of 2500)
Aantal stuks
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
RS-stocknr. 661-3407
FabrikantnummerXTR111AIDGQT
1,68 €
Each
Aantal stuks
- - - - - - - Surface Mount HTSSOP 10 3 x 3 x 1.02mm 1.02mm 3mm -
RS-stocknr. 811-5807
FabrikantnummerLMP8640MKE-F/NOPB
0,924 €
Each (In a Pack of 5)
Aantal stuks
Dual - ±12 V, ±2.7 V, ±5 V 103dB 1 Buffered 800 μA Surface Mount SOT-23 6 3.05 x 1.75 x 1mm 1mm 3.05mm 12 V
RS-stocknr. 860-7517
FabrikantnummerCS30CL
0,996 €
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. 191-3231
FabrikantnummerMAX9938HEUK+T
FabrikantMaxim Integrated
0,651 €
Each (On a Reel of 2500)
Aantal stuks
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
RS-stocknr. 919-9354
FabrikantnummerLT6105IMS8#PBF
FabrikantAnalog Devices
1,612 €
Each (In a Tube of 50)
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. 825-3081
FabrikantnummerINA213AIDCKR
1,076 €
Each (In a Pack of 5)
Aantal stuks
Single 5 V - 105dB 1 Analogue 5 mA Surface Mount SC-70 6 2.15 x 1.4 x 1mm 1mm 2.15mm 26 V
RS-stocknr. 154-920
FabrikantnummerZXCT1009FTA
FabrikantDiodesZetex
0,822 €
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. 189-9253
FabrikantnummerMAX4070AUA+
FabrikantMaxim Integrated
1,892 €
Each (In a Pack of 5)
Aantal stuks
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
RS-stocknr. 197-7169
FabrikantnummerINA168NA/250
2,066 €
Each (In a Pack of 5)
Aantal stuks
Single 5 V - 100dB 1 Current - - SOT-23 5 - - - -
RS-stocknr. 121-8921
FabrikantnummerINA194AIDBVT
1,483 €
Each (On a Reel of 250)
Aantal stuks
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
RS-stocknr. 738-5279
FabrikantnummerZXCT1087E5TA
FabrikantDiodesZetex
1,238 €
Each (In a Pack of 5)
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 835-3790
FabrikantnummerAD8417WBRZ
FabrikantAnalog Devices
2,50 €
Each (In a Pack of 2)
Aantal stuks
Single 5 V - 90dB 1 Buffered 4.1 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V
RS-stocknr. 709-4535
FabrikantnummerINA213AIDCKT
1,29 €
Each
Aantal stuks
Single 12 V, 15 V, 18 V, 24 V, 3 V, 5 V, 9 V - 100dB 1 - - Surface Mount SC-70 6 2 x 1.25 x 0.9mm 0.9mm 2mm 26 V
RS-stocknr. 162-8172
FabrikantnummerINA3221AIRGVT
2,38 €
Each (On a Reel of 250)
Aantal stuks
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
RS-stocknr. 178-4424
FabrikantnummerNCS214RMUTAG
FabrikantON Semiconductor
0,572 €
Each (In a Pack of 50)
Aantal stuks
Single 5 V - 105dB 1 Rail to Rail 80 μA Surface Mount UQFN 10 1.4 x 1.8 x 0.55mm 0.55mm 1.4mm 26 V
RS-stocknr. 183-1949
FabrikantnummerAD8210YRZ-REEL7
FabrikantAnalog Devices
4,135 €
Each (In a Pack of 2)
Aantal stuks
Single 5 V - 100dB 1 Single Ended - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V
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