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. 920-9846
FabrikantnummerNCS199A3SQT2G
FabrikantON Semiconductor
0,252 €
Each (In a Pack of 10)
Aantal stuks
Single 2.7 → 26 V - 100dB 1 Rail to Rail 5 mA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
RS-stocknr. 178-4384
FabrikantnummerNCS199A1RSQT2G
FabrikantON Semiconductor
0,19 €
Each (On a Reel of 3000)
Aantal stuks
Single 5 V - 100dB 1 Rail to Rail 80 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
RS-stocknr. 197-7172
FabrikantnummerINA193AIDBVT
1,454 €
Each (On a Reel of 250)
Aantal stuks
Single 12 V - 80dB 1 Voltage - - SOT-23 5 - - - -
RS-stocknr. 761-9626
FabrikantnummerLTC6101HVACS5#TRMPBF
FabrikantAnalog Devices
3,86 €
Each
Aantal stuks
Single 5 → 100 V 5 → 100V - 1 Unidirectional 0.64 mA Surface Mount TSOT-23 5 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm 100 V
RS-stocknr. 197-7169
FabrikantnummerINA168NA/250
2,154 €
Each (In a Pack of 5)
Aantal stuks
Single 5 V - 100dB 1 Current - - SOT-23 5 - - - -
RS-stocknr. 661-3352
FabrikantnummerINA200AIDGKT
2,378 €
Each (In a Pack of 5)
Aantal stuks
- - - - - - - Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm -
RS-stocknr. 545-7625
FabrikantnummerINA194AIDBVT
2,502 €
Each (In a Pack of 5)
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. 190-4306
FabrikantnummerMAX4081SAUA+
FabrikantMaxim Integrated
1,762 €
Each (In a Tube of 50)
Aantal stuks
Single 4.5 → 76 V - 100dB 1 Voltage 190 μA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 76 V
RS-stocknr. 806-7907
FabrikantnummerAD8219BRMZ
FabrikantAnalog Devices
2,34 €
Each (In a Pack of 2)
Aantal stuks
Single -0.3 → 85 V - 94dB 1 Unidirectional 130 Bias μA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 80 V
RS-stocknr. 121-8924
FabrikantnummerINA197AIDBVT
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. 545-7647
FabrikantnummerINA196AIDBVT
2,502 €
Each (In a Pack of 5)
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. 203-3515
FabrikantnummerTSC2012IST
1,778 €
Each (In a Pack of 5)
Aantal stuks
Single 2.7 V, 5.5 V - 115dB 1 Bidirectional - - MiniSO8 8 - - - -
RS-stocknr. 190-6673
FabrikantnummerMAX9922EUB+
FabrikantMaxim Integrated
2,502 €
Each (In a Pack of 5)
Aantal stuks
Single 2.85 → 5.5 V - 121dB 1 Rail to Rail 1500 μA Surface Mount μMAX 10 3.16 x 3.12 x 0.95mm 0.95mm 3.16mm 5.5 V
RS-stocknr. 154-920
FabrikantnummerZXCT1009FTA
FabrikantDiodesZetex
0,846 €
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. 860-7514
FabrikantnummerCS30BL
1,038 €
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. 190-4309
FabrikantnummerMAX4081TAUA+
FabrikantMaxim Integrated
1,817 €
Each (In a Tube of 50)
Aantal stuks
Single 4.5 → 76 V - 100dB 1 Voltage 190 μA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 76 V
RS-stocknr. 660-4841
FabrikantnummerINA170EA/250
3,36 €
Each
Aantal stuks
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
RS-stocknr. 185-8084
FabrikantnummerNCS199A2RSQT2G
FabrikantON Semiconductor
0,242 €
Each (On a Reel of 3000)
Aantal stuks
Single 2.2 → 26 V - 100dB 1 Rail to Rail 60 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
RS-stocknr. 190-4298
FabrikantnummerMAX4071AUA+
FabrikantMaxim Integrated
1,414 €
Each (In a Tube of 50)
Aantal stuks
Single 2.7 → 24 V - 100dB 1 Bidirectional 250 μA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 24 V
RS-stocknr. 189-7306
FabrikantnummerMAX4173FEUT+T
FabrikantMaxim Integrated
1,479 €
Each (On a Reel of 2500)
Aantal stuks
Single 3 → 28 V - 90dB 1 - 1 mA Surface Mount SOT-23 6 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V