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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Beskrivning Pris 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-artikelnummer 730-0556
Tillv. art.nrINA219BIDCNT
VarumärkeTexas Instruments
23,89 kr
Each
Enheter
- - - - - - - Surface Mount SOT-23 8 3 x 1.75 x 1.3mm 1.3mm 3mm -
RS-artikelnummer 811-5807
Tillv. art.nrLMP8640MKE-F/NOPB
VarumärkeTexas Instruments
8,306 kr
Each (In a Pack of 5)
Enheter
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
Nytt
RS-artikelnummer 190-4306
Tillv. art.nrMAX4081SAUA+
VarumärkeMaxim Integrated
19,606 kr
Each (In a Tube of 50)
Enheter
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
Nytt
RS-artikelnummer 190-4344
Tillv. art.nrMAX44284HAUT+T
VarumärkeMaxim Integrated
11,147 kr
Each (On a Reel of 2500)
Enheter
Single 1.7 5.5 V - 91.3dB 1 Voltage 41.5 μA Surface Mount SOT-23 6 3 x 1.75 x 1.3mm 1.3mm 3mm 5.5 V
Nytt
RS-artikelnummer 190-4325
Tillv. art.nrMAX4372HEUK+T
VarumärkeMaxim Integrated
12,34 kr
Each (On a Reel of 2500)
Enheter
Single 2.7 28 V - 85 (Typ.)dB 1 Voltage 60 μA Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V
RS-artikelnummer 767-3605
Tillv. art.nrISL28006FH50Z-T7A
12,20 kr
Each (In a Pack of 2)
Enheter
Single 2.7 → 28 V - 105dB 1 - 50 μA Surface Mount SOT-23 5 2.9 x 1.6 x 1.14mm 1.14mm 2.9mm 28 V
RS-artikelnummer 919-9556
Tillv. art.nrLTC6101HVAHMS8#PBF
VarumärkeAnalog Devices
34,453 kr
Each (In a Tube of 50)
Enheter
Single 100 V - - 1 Unidirectional 0.72 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 100 V
Nytt
RS-artikelnummer 190-4299
Tillv. art.nrMAX4073TAUT+T
VarumärkeMaxim Integrated
10,475 kr
Each (On a Reel of 2500)
Enheter
Single 3 28 V - 90 (Typ.)dB 1 Voltage 1.2 mA Surface Mount SOT-23 6 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V
Nytt
RS-artikelnummer 190-6317
Tillv. art.nrMAX4372TESA+
VarumärkeMaxim Integrated
17,582 kr
Each (In a Pack of 5)
Enheter
Single 2.7 → 28 V - 85 (Typ.)dB 1 Voltage 60 μA Surface Mount SO 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
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