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 920-9846
製造零件編號NCS199A3SQT2G
HK$5.54
/個 (每包:10個)
單位
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庫存編號 163-0188
製造零件編號NCS211SQT2G
HK$7.197
個 (在毎卷:3000)
單位
Single 2.7 → 26 V - 103dB 1 Rail to Rail 100 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
全新
RS庫存編號 178-4387
製造零件編號NCS214RMUTAG
HK$2.592
個 (在毎卷:3000)
單位
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
全新
RS庫存編號 178-4385
製造零件編號NCS210RMUTAG
HK$2.592
個 (在毎卷:3000)
單位
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
全新
RS庫存編號 185-8098
製造零件編號NCV213RSQT2G
HK$3.047
個 (在毎卷:3000)
單位
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
全新
RS庫存編號 185-8086
製造零件編號NCS210RSQT2G
HK$2.689
個 (在毎卷:3000)
單位
Single 2.2 → 26 V - 105dB 1 Rail to Rail 60 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
RS庫存編號 163-0187
製造零件編號NCS210SQT2G
HK$7.197
個 (在毎卷:3000)
單位
Single 2.7 → 26 V - 103dB 1 Rail to Rail 5 mA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
RS庫存編號 920-9833
製造零件編號NCS199A1SQT2G
HK$5.54
/個 (每包:10個)
單位
Single 2.7 → 26 V - 97dB 1 Rail to Rail 5 mA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
全新
RS庫存編號 185-8087
製造零件編號NCS214RSQT2G
HK$2.689
個 (在毎卷:3000)
單位
Single 2.2 → 26 V - 105dB 1 Rail to Rail 60 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
全新
RS庫存編號 185-8084
製造零件編號NCS199A2RSQT2G
HK$2.689
個 (在毎卷:3000)
單位
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
全新
RS庫存編號 185-8964
製造零件編號NCS214RSQT2G
HK$7.483
/個 (每包:10個)
單位
Single 2.2 → 26 V - 105dB 1 Rail to Rail 60 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
全新
RS庫存編號 185-8812
製造零件編號NCS199A2RSQT2G
HK$7.483
/個 (每包:10個)
單位
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庫存編號 163-0171
製造零件編號NCS199A1SQT2G
HK$4.318
個 (在毎卷:3000)
單位
Single 2.7 → 26 V - 97dB 1 Rail to Rail 5 mA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
全新
RS庫存編號 178-4386
製造零件編號NCS213RSQT2G
HK$2.592
個 (在毎卷:3000)
單位
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
全新
RS庫存編號 186-1269
製造零件編號NCS211RMUTAG
HK$2.689
個 (在毎卷:3000)
單位
Single 2.2 → 26 V - 105dB 1 Rail to Rail 60 μA Surface Mount UQFN 10 1.4 x 1.8 x 0.55mm 0.55mm 1.4mm 26 V
全新
RS庫存編號 185-8099
製造零件編號NCV214RSQT2G
HK$3.047
個 (在毎卷:3000)
單位
Single 2.2 → 26 V - 105dB 1 Rail to Rail 60 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
全新
RS庫存編號 178-4384
製造零件編號NCS199A1RSQT2G
HK$2.592
個 (在毎卷:3000)
單位
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
全新
RS庫存編號 186-1444
製造零件編號NCS211RMUTAG
HK$7.483
/個 (每包:10個)
單位
Single 2.2 → 26 V - 105dB 1 Rail to Rail 60 μA Surface Mount UQFN 10 1.4 x 1.8 x 0.55mm 0.55mm 1.4mm 26 V
RS庫存編號 920-9855
製造零件編號NCS210SQT2G
HK$10.26
/個 (每包:10個)
單位
Single 2.7 → 26 V - 103dB 1 Rail to Rail 5 mA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
RS庫存編號 163-0173
製造零件編號NCS199A3SQT2G
HK$4.318
個 (在毎卷:3000)
單位
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