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 133-0174
製造零件編號INA250A3PW
TWD143.00
/個 (每包:2個)
單位
Single - - 106dB 1 Analogue, Bidirectional ±15 A Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 36 V
RS庫存編號 122-0319
製造零件編號ZXCT1110W5-7
TWD16.30
個 (在毎卷:3000)
單位
- - - - - - - - - - - - - -
RS庫存編號 189-8723
製造零件編號MAX4173FESA+
TWD65.50
/個 (每包:10個)
單位
Single 3 → 28 V - 90dB 1 Differential 1 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
RS庫存編號 190-6329
製造零件編號MAX4373FEUA+T
TWD80.00
/個 (每包:5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 191-4880
製造零件編號MAX4378FAUD+
TWD122.00
/個 (每包:5個)
單位
Single 3 → 28 V - 90dB - Voltage 2.2 mA Surface Mount TSSOP 14 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm 28 V
全新
RS庫存編號 208-5083
製造零件編號TSC2011IYST
TWD36.90
個 (在毎卷:4000)
單位
Single 2.7 → 5.5 V - 90dB 1 Bidirectional - - MiniSO8 8 - - - -
RS庫存編號 190-6433
製造零件編號MAX9938FEUK+T
TWD47.20
/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 786-9718
製造零件編號LT6100IMS8#PBF
TWD125.00
/個 (每包:2個)
單位
Single 2.7 → 36 V - 100dB 1 Differential 145 μA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 36 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 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 798-7743
製造零件編號MAX4377TASA+
TWD94.50
/個 (每包:2個)
單位
Single 3 → 28 V - 90dB 1 - 2.2 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 28 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 - - - -
全新
RS庫存編號 216-8587
製造零件編號LT6106HS5#TRPBF
TWD79.00
/個 (每包:5個)
單位
Single 36 V - 160dB 1 Current - - TSOT 5 - - - -
RS庫存編號 189-8782
製造零件編號MAX4080FASA+
TWD78.80
/個 (每包:5個)
單位
Single 4.5 → 76 V - 100dB 1 Rail to Rail 0.19 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 76 V
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 190-4327
製造零件編號MAX4373FEUA+T
TWD54.30
個 (在毎卷:2500)
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 190-6571
製造零件編號MAX4081TASA+
TWD95.00
/個 (每包:5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 923-7917
製造零件編號MAX4080SASA+
TWD60.40
毎管:100 個
單位
- - - - - - - - - - - - - -
RS庫存編號 206-8640
製造零件編號TSC2010IST
TWD70.20
/個 (每包:5個)
單位
Single 2.7 → 5.5 V - - 1 Bidirectional - - 8 8 - - - -
RS庫存編號 786-1114
製造零件編號MAX4373FESA+
TWD105.00
/個 (每包:2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