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. 822-5743
FabrikantnummerLTC4151CDD#PBF
FabrikantAnalog Devices
5,14 €
Each
Aantal stuks
Single 7 → 80 V - - 1 Open Collector 1.7 mA Surface Mount DFN 10 3 x 3 x 0.7mm 0.7mm 3mm 80 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
RS-stocknr. 169-0202
FabrikantnummerSI8920AC-IP
FabrikantSilicon Labs
2,852 €
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. 162-8573
FabrikantnummerINA219AIDCNR
0,973 €
Each (On a Reel of 3000)
Aantal stuks
Single 6 V - 100dB 1 Digital 5 mA Surface Mount SOT-23 8 3 x 1.75 x 1.3mm 1.3mm 3mm 5.5 V
RS-stocknr. 811-5797
FabrikantnummerLMP8640HVMKE-F/NOPB
2,298 €
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. 189-7297
FabrikantnummerMAX4080TASA+
FabrikantMaxim Integrated
1,353 €
Each (In a Tube of 100)
Aantal stuks
Single 4.5 → 76 V - 100dB 1 Rail to Rail 0.19 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 76 V
RS-stocknr. 178-4385
FabrikantnummerNCS210RMUTAG
FabrikantON Semiconductor
0,187 €
Each (On a Reel of 3000)
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. 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. 190-4375
FabrikantnummerMAX9634TEUK+T
FabrikantMaxim Integrated
0,691 €
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. 191-6982
FabrikantnummerMAX4377HASA+
FabrikantMaxim Integrated
2,34 €
Each (In a Pack of 5)
Aantal stuks
Dual - ±8V 90dB 1 Buffered 2.2 mA Surface Mount SO 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
RS-stocknr. 197-7176
FabrikantnummerINA213AIDCKT
1,019 €
Each (In a Pack of 10)
Aantal stuks
Single 5 V - 100dB 1 Voltage - - SC-70 6 - - - -
RS-stocknr. 190-4315
FabrikantnummerMAX4173HESA+
FabrikantMaxim Integrated
1,11 €
Each (In a Tube of 100)
Aantal stuks
Single 3 → 28 V - 90 (Typ.)dB 1 Voltage 1 mA Surface Mount SO 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
RS-stocknr. 197-7163
FabrikantnummerINA138NA/250
1,902 €
Each (In a Pack of 5)
Aantal stuks
Single 5 V - 100dB 1 Current - - SOT-23 5 - - - -
RS-stocknr. 761-8897
FabrikantnummerLT6106CS5#TRMPBF
FabrikantAnalog Devices
1,82 €
Each
Aantal stuks
Single 36 V - - 1 - 0.13 mA Surface Mount TSOT-23 5 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm 36 V
RS-stocknr. 190-4374
FabrikantnummerMAX9634FEUK+T
FabrikantMaxim Integrated
0,691 €
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. 197-7174
FabrikantnummerINA213AIDCKT
0,691 €
Each (On a Reel of 250)
Aantal stuks
Single 5 V - 100dB 1 Voltage - - SC-70 6 - - - -