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
全新
RS庫存編號 208-5084
製造零件編號TSC2011IYST
TWD84.20
/個 (每包:5個)
單位
Single 2.7 → 5.5 V - 90dB 1 Bidirectional - - MiniSO8 8 - - - -
RS庫存編號 798-9903
製造零件編號AD8418AWBRZ
TWD110.00
單位
Single 2.7 → 5.5 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 190-6637
製造零件編號MAX9634TEUK+T
TWD51.20
/個 (每包:5個)
單位
Single 1.6 → 28 V - 94dB 1 Voltage 2.5 μA Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V
RS庫存編號 154-7664
製造零件編號LTC6101BCS5#TRMPBF
TWD64.40
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 922-8235
製造零件編號ZXCT1084E5TA
TWD24.20
個 (在毎卷:3000)
單位
- - - - - - - - - - - - - -
RS庫存編號 817-6619
製造零件編號INA3221AIRGVT
TWD164.00
1 Tape of 1 Set(s)
Tape(s)
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
RS庫存編號 919-9881
製造零件編號LT6106HS5#TRMPBF
TWD58.60
個 (在毎卷:500)
單位
Single 2.7 → 36 V - - 1 - 115 μA Surface Mount TSOT-23 5 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm 36 V
全新
RS庫存編號 212-2552
製造零件編號MAX40204ANA+T
TWD39.20
個 (在毎卷:5000)
單位
Single 5.5 V 36V 110dB 2 Bidirectional - - 8-Bump WLP 8 - - - -
RS庫存編號 197-7174
製造零件編號INA213AIDCKT
TWD27.20
個 (在毎卷:250)
單位
Single 5 V - 100dB 1 Voltage - - SC-70 6 - - - -
RS庫存編號 197-7171
製造零件編號INA169NA/250
TWD106.00
/個 (每包:5個)
單位
Single 5 V - 100dB 1 Current - - SOT-23 5 - - - -
RS庫存編號 190-4328
製造零件編號MAX4373TEUA+
TWD98.40
毎管:50 個
單位
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庫存編號 162-8172
製造零件編號INA3221AIRGVT
TWD102.80
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
全新
RS庫存編號 210-2051
製造零件編號TSC2012IYDT
TWD83.80
/個 (每包:5個)
單位
Single 5.5 V - 115dB 1 Bidirectional - - SO8 8 - - - -
RS庫存編號 121-9260
製造零件編號INA210AIDCKT
TWD29.30
個 (在毎卷:250)
單位
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庫存編號 160-9876
製造零件編號AD8418ABRMZ-RL
TWD46.60
個 (在毎卷:3000)
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 922-3322
製造零件編號INA200AIDGKT
TWD56.60
個 (在毎卷:250)
單位
- - - - - - - - - - - - - -
全新
RS庫存編號 210-9079
製造零件編號TSC2012IYST
TWD36.70
個 (在毎卷:4000)
單位
Single 5.5 V - 115 1 Rail to Rail - - Mini SO-8 8 - - - -
RS庫存編號 189-7320
製造零件編號MAX4373TESA+
TWD76.50
毎管:100 個
單位
Single 2.7 → 28 V - 85dB 1 Differential 100 μA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
RS庫存編號 461-6558
製造零件編號INA139NA/250
TWD81.00
單位
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
RS庫存編號 190-4389
製造零件編號MAX9938FEUK+T
TWD26.60
個 (在毎卷:2500)
單位
Single 1.6 → 28 V - 94dB 1 Voltage 2.5 μA Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V