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 835-3790
製造零件編號AD8417WBRZ
TWD111.50
/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 922-3265
製造零件編號INA271AID
TWD85.90
毎管:75 個
單位
- - - - - - - - - - - - - -
RS庫存編號 661-2491
製造零件編號INA271AID
TWD106.00
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 835-3781
製造零件編號AD8417WBRMZ
TWD103.00
/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 921-2940
製造零件編號INA282AID
TWD121.40
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
TWD152.00
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 697-7224
製造零件編號AD8210WYRZ
TWD180.00
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 817-6603
製造零件編號INA282AID
TWD142.80
/個 (每包:5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 738-5272
製造零件編號ZXCT1107SA-7
TWD28.20
/個 (每包:5個)
單位
- - - - - - - - - - - - - -
RS庫存編號 806-7907
製造零件編號AD8219BRMZ
TWD103.00
/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
TWD96.60
/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 922-8238
製造零件編號ZXCT1107SA-7
TWD12.10
個 (在毎卷:3000)
單位
- - - - - - - - - - - - - -
RS庫存編號 820-9390
製造零件編號AD8418BRMZ
TWD96.60
/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 412-456
製造零件編號AD8210YRZ
TWD164.00
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 159-9339
製造零件編號AD8211YRJZ-R2
TWD56.20
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 426-269
製造零件編號TSC101CILT
TWD41.00
/個 (每包:5個)
單位
Single 5 V, 9 V, 12 V, 15 V, 18 V - 90dB 1 - 0.3 mA Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm 24 V
RS庫存編號 190-4308
製造零件編號MAX4081TASA+
TWD63.20
毎管:100 個
單位
Single 4.5 → 76 V - 100dB 1 Voltage 190 μA Surface Mount SO 8 5 x 4 x 1.5mm 1.5mm 5mm 76 V
RS庫存編號 190-4309
製造零件編號MAX4081TAUA+
TWD72.50
毎管:50 個
單位
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庫存編號 825-3088
製造零件編號INA219AIDCNR
TWD84.80
/個 (每包:5個)
單位
Single 6 V - 100dB 1 Digital 5 mA Surface Mount SOT-23 8 3 x 1.75 x 1.3mm 1.3mm 3mm 5.5 V
RS庫存編號 162-8172
製造零件編號INA3221AIRGVT
TWD95.50
個 (在毎卷:250)
單位
Single 2.7 → 5.5 V - 110dB 1 Open Drain 450 μA Surface Mount VQFN 16 4.15 x 4.15 x 0.95mm 0.95mm 4.15mm 5.5 V