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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Description Price 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庫存編號 919-9550
製造零件編號LTC6101BIS5#TRMPBF
HK$20.76
個 (在毎卷:500)
單位
Single 4 → 60 V 4 → 60V - 1 Unidirectional 0.64 mA Surface Mount TSOT-23 5 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm 60 V
RS庫存編號 761-9623
製造零件編號LTC6101BIS5#TRMPBF
HK$30.03
單位
Single 4 → 60 V 4 → 60V - 1 Unidirectional 0.64 mA Surface Mount TSOT-23 5 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm 60 V
RS庫存編號 823-0079
製造零件編號LTC6102IMS8#PBF
HK$32.52
/個 (每包:2個)
單位
Single 5 → 100 V - - 1 Rail to Rail 650 μA Surface Mount MSOP 8 3 x 3 x 0.9984mm 0.998mm 3mm 100 V
RS庫存編號 177-7171
製造零件編號LTC6102IMS8#PBF
HK$27.133
毎管:50 個
單位
Single 5 → 100 V - - 1 Rail to Rail 650 μA Surface Mount MSOP 8 3 x 3 x 0.9984mm 0.998mm 3mm 100 V
RS庫存編號 917-3435
製造零件編號LTC6102CMS8#PBF
HK$23.526
毎管:50 個
單位
Single 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V - - 1 - 0.45 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 60 V
RS庫存編號 168-4352
製造零件編號LTC4151CDD#PBF
HK$43.192
毎管:121 個
單位
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庫存編號 884-6775
製造零件編號LTC6102HMS8#PBF
HK$37.11
/個 (每包:2個)
單位
Single 12 V - - 1 - 675 μA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 60 V
RS庫存編號 155-7545
製造零件編號LTC4151IDD#PBF
HK$42.499
毎管:141 個
單位
Single 4.5 → 5.5 V - - 1 Open Collector 1.7 mA Surface Mount DFN 10 3 x 3 x 0.7mm 0.7mm 3mm 80 V
RS庫存編號 919-9569
製造零件編號LTC6101HVACS5#TRMPBF
HK$23.784
個 (在毎卷:500)
單位
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庫存編號 884-6807
製造零件編號LTC6101AIMS8#PBF
HK$27.512
/個 (每包:5個)
單位
Single 12 V - - 1 - 640 μA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 60 V
RS庫存編號 423-478
製造零件編號LTC6104CMS8#PBF
HK$31.77
單位
Single 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V - - 1 - 1.04 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 60 V
RS庫存編號 761-9614
製造零件編號LTC6101BCS5#TRMPBF
HK$36.33
單位
Single 4 → 60 V 4 → 60V - 1 Unidirectional 0.64 mA Surface Mount TSOT-23 5 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm 60 V
RS庫存編號 761-9620
製造零件編號LTC6101HVAHMS8#PBF
HK$48.93
單位
Single 100 V - - 1 Unidirectional 0.72 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 100 V
RS庫存編號 822-6657
製造零件編號LTC4151IDD#PBF
HK$54.38
單位
Single 4.5 → 5.5 V - - 1 Open Collector 1.7 mA Surface Mount DFN 10 3 x 3 x 0.7mm 0.7mm 3mm 80 V
RS庫存編號 822-5743
製造零件編號LTC4151CDD#PBF
HK$43.21
單位
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庫存編號 423-472
製造零件編號LTC6102CMS8#PBF
HK$29.32
單位
Single 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V - - 1 - 0.45 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 60 V
RS庫存編號 919-9556
製造零件編號LTC6101HVAHMS8#PBF
HK$29.894
毎管:50 個
單位
Single 100 V - - 1 Unidirectional 0.72 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 100 V
RS庫存編號 154-7664
製造零件編號LTC6101BCS5#TRMPBF
HK$18.728
個 (在毎卷:500)
單位
Single 4 → 60 V 4 → 60V - 1 Unidirectional 0.64 mA Surface Mount TSOT-23 5 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm 60 V
RS庫存編號 145-7057
製造零件編號LTC6104CMS8#PBF
HK$17.813
毎管:50 個
單位
Single 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V - - 1 - 1.04 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 60 V
RS庫存編號 761-9626
製造零件編號LTC6101HVACS5#TRMPBF
HK$47.75
單位
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