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 160-9875
製造零件編號AD8417WBRZ
TWD70.80
毎管:98 個
單位
Single 5 V - 90dB 1 Buffered 4.1 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V
RS庫存編號 835-3790
製造零件編號AD8417WBRZ
TWD77.50
/個 (每包:2個)
單位
Single 5 V - 90dB 1 Buffered 4.1 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V
RS庫存編號 661-2491
製造零件編號INA271AID
TWD71.00
單位
Single 3 V, 5 V, 9 V, 12 V, 15 V - 80dB 1 - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 1.58mm 4.9mm 18 V
RS庫存編號 912-6215
製造零件編號AD8210WYRZ
TWD133.10
毎管:98 個
單位
Single 5 V - - 1 - - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V
RS庫存編號 820-9390
製造零件編號AD8418BRMZ
TWD78.60
/個 (每包:5個)
單位
Single 5 V - 90dB 1 Bidirectional 130 μA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V
RS庫存編號 806-7907
製造零件編號AD8219BRMZ
TWD70.50
/個 (每包:2個)
單位
Single -0.3 → 85 V - 94dB 1 Unidirectional 130 Bias μA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 80 V
RS庫存編號 796-8912
製造零件編號AD8211YRJZ-R2
TWD73.20
/個 (每包:5個)
單位
Single 5 V - 100dB 1 Buffered 2 mA Surface Mount SOT-23 5 3 x 1.7 x 1.3mm 1.3mm 3mm 5.5 V
RS庫存編號 738-5272
製造零件編號ZXCT1107SA-7
TWD23.20
/個 (每包:5個)
單位
- - - - - - - - - - - - - -
RS庫存編號 159-9339
製造零件編號AD8211YRJZ-R2
TWD59.00
個 (在毎卷:250)
單位
Single 5 V - 100dB 1 Buffered 2 mA Surface Mount SOT-23 5 3 x 1.7 x 1.3mm 1.3mm 3mm 5.5 V
RS庫存編號 160-8581
製造零件編號AD8418BRMZ
TWD55.30
毎管:50 個
單位
Single 5 V - 90dB 1 Bidirectional 130 μA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V
RS庫存編號 921-2940
製造零件編號INA282AID
TWD82.60
毎管:75 個
單位
Single 2.7 → 18 V - 120dB 1 Bidirectional 900 μA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 18 V
RS庫存編號 423-472
製造零件編號LTC6102CMS8#PBF
TWD149.00
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 835-3781
製造零件編號AD8417WBRMZ
TWD82.00
/個 (每包:2個)
單位
Single 5 V - 90dB 1 Buffered 4.1 mA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V
RS庫存編號 917-3435
製造零件編號LTC6102CMS8#PBF
TWD83.10
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 697-7224
製造零件編號AD8210WYRZ
TWD132.00
單位
Single 5 V - - 1 - - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V
RS庫存編號 160-1727
製造零件編號AD8219BRMZ
TWD59.00
毎管:50 個
單位
Single -0.3 → 85 V - 94dB 1 Unidirectional 130 Bias μA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 80 V
RS庫存編號 145-7236
製造零件編號AD8417WBRMZ
TWD70.80
毎管:50 個
單位
Single 5 V - 90dB 1 Buffered 4.1 mA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V
RS庫存編號 912-7163
製造零件編號AD8210YRZ
TWD115.30
毎管:98 個
單位
Single 5 V - 120 1 Bidirectional - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V
RS庫存編號 412-456
製造零件編號AD8210YRZ
TWD136.00
單位
Single 5 V - 120 1 Bidirectional - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V
RS庫存編號 922-8238
製造零件編號ZXCT1107SA-7
TWD12.40
個 (在毎卷:3000)
單位
- - - - - - - - - - - - - -