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 761-8453
Tillv. art.nrLT1787IMS8#PBF
VarumärkeAnalog Devices
60,39 kr
Each
Enheter
Single 36 V - - 1 Bidirectional, Unidirectional 0.02 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 36 V
RS-artikelnummer 165-9191
Tillv. art.nrMAX4080TAUA+
VarumärkeMaxim Integrated
14,379 kr
Each (In a Tube of 50)
Enheter
Single 4.5 → 76 V - 100dB 1 Rail to Rail 0.19 mA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 76 V
Nytt
RS-artikelnummer 189-7365
Tillv. art.nrMAX9919NASA+
VarumärkeMaxim Integrated
14,833 kr
Each (In a Tube of 100)
Enheter
Single 4.5 5.5 V - 80dB 1 Rail to Rail 2.2 mA Surface Mount SOIC 8 4.98 x 3.99 x 1.58mm 1.58mm 4.98mm 5.5 V
RS-artikelnummer 661-3422
Tillv. art.nrINA206AID
VarumärkeTexas Instruments
23,68 kr
Each
Enheter
- - - - - - - Surface Mount SOIC 14 8.65 x 3.91 x 1.58mm 1.58mm 8.65mm -
RS-artikelnummer 121-6660
Tillv. art.nrAD8273ARZ
VarumärkeAnalog Devices
22,043 kr
Each (In a Tube of 56)
Enheter
- - - - - - - - - - - - - -
Nytt
RS-artikelnummer 190-4327
Tillv. art.nrMAX4373FEUA+T
VarumärkeMaxim Integrated
17,276 kr
Each (On a Reel of 2500)
Enheter
Single 2.7 28 V - 85 (Typ.)dB 1 Voltage 100 μA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 28 V
RS-artikelnummer 732-8425
Tillv. art.nrMAX4372FEUK+T
VarumärkeMaxim Integrated
19,604 kr
Each (In a Pack of 5)
Enheter
Single 2.7 → 28 V - - 1 Differential 0.06 mA Surface Mount SOT-23 5 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
RS-artikelnummer 461-6558
Tillv. art.nrINA139NA/250
VarumärkeTexas Instruments
17,78 kr
Each
Enheter
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
Nytt
RS-artikelnummer 192-1935
Tillv. art.nrMAX9920ASA+
VarumärkeMaxim Integrated
11,481 kr
Each (In a Tube of 100)
Enheter
Single 4.5 5.5 V - 72dB 1 Rail to Rail 2.2 mA Surface Mount SOIC 8 4.98 x 3.99 x 1.58mm 1.58mm 4.98mm 5.5 V
RS-artikelnummer 178-4566
Tillv. art.nrNCS210RMUTAG
VarumärkeON Semiconductor
6,336 kr
Each (In a Pack of 50)
Enheter
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-artikelnummer 923-6905
Tillv. art.nrINA211AIDCKT
VarumärkeTexas Instruments
5,744 kr
Each (On a Reel of 250)
Enheter
Single 3 V, 5 V, 9 V, 12 V, 15 V, 18 V, 24 V - 105dB 1 - - Surface Mount SC-70 6 2 x 1.25 x 0.9mm 0.9mm 2mm 26 V
RS-artikelnummer 922-3344
Tillv. art.nrXTR111AIDGQT
VarumärkeTexas Instruments
11,44 kr
Each (On a Reel of 250)
Enheter
- - - - - - - - - - - - - -
Nytt
RS-artikelnummer 197-7176
Tillv. art.nrINA213AIDCKT
VarumärkeTexas Instruments
13,039 kr
Each (In a Pack of 10)
Enheter
Single 5 V - 100dB 1 Voltage - - SC-70 6 - - - -
RS-artikelnummer 178-4554
Tillv. art.nrNCS199A1RSQT2G
VarumärkeON Semiconductor
6,001 kr
Each (In a Pack of 50)
Enheter
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-artikelnummer 103-9965
Tillv. art.nrMAX4080SAUA+
VarumärkeMaxim Integrated
14,602 kr
Each (In a Tube of 50)
Enheter
Single 4.5 → 76 V - 100dB 1 Rail to Rail 0.19 mA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 76 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
RS-artikelnummer 738-5250
Tillv. art.nrZXCT1082E5TA
VarumärkeDiodesZetex
13,566 kr
Each (In a Pack of 5)
Enheter
Single 2.7 → 60 V - 80dB - - - - - - - - - -
Nytt
RS-artikelnummer 190-6688
Tillv. art.nrMAX9934TAUA+
VarumärkeMaxim Integrated
19,518 kr
Each (In a Pack of 5)
Enheter
Single 2.5 → 3.6 V - 98dB 1 Current 230 μA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 3.6 V
RS-artikelnummer 761-9626
Tillv. art.nrLTC6101HVACS5#TRMPBF
VarumärkeAnalog Devices
36,40 kr
Each
Enheter
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
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