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 920-6317
製造零件編號TSC101AILT
TWD17.30
個 (在毎卷:3000)
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 894-7027
製造零件編號TS1106-200ITD833
TWD50.40
/個 (每包:5個)
單位
Single 1.7 → 5.25 V - 120dB 2 Buffered 1.3 μA Surface Mount TDFN 8 3 x 3 x 0.75mm 0.75mm 3mm 6 V
RS庫存編號 191-5281
製造零件編號MAX4373FEUA+
TWD90.90
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 121-8921
製造零件編號INA194AIDBVT
TWD61.40
個 (在毎卷:250)
單位
Single 3 V, 5 V, 9 V, 12 V, 15 V - 80dB 1 - - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 1.15mm 2.9mm 18 V
RS庫存編號 820-9397
製造零件編號AD8418WBRMZ
TWD99.80
/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
全新
RS庫存編號 216-8626
製造零件編號LTC6101CCS5#TRMPBF
TWD62.10
個 (在毎卷:500)
單位
Single 100 V - 118dB 1 Current - - TSOT 5 - - - -
RS庫存編號 190-6299
製造零件編號MAX4081SASA+
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 786-9714
製造零件編號LT6100CMS8#PBF
TWD109.20
/個 (每包:5個)
單位
Single 2.7 → 36 V - 100dB 1 Differential 130 μA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 36 V
RS庫存編號 197-7169
製造零件編號INA168NA/250
TWD106.00
/個 (每包:5個)
單位
Single 5 V - 100dB 1 Current - - SOT-23 5 - - - -
RS庫存編號 189-7289
製造零件編號MAX4372FEUK+T
TWD42.40
個 (在毎卷:2500)
單位
Single 2.7 → 28 V - - 1 Differential 0.06 mA Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V
RS庫存編號 190-6392
製造零件編號MAX4080SASA+T
TWD77.60
/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 169-0202
製造零件編號SI8920AC-IP
TWD114.60
毎管:50 個
單位
Single 3 → 5.5 V - - 2 Differential 5.5 mA Through Hole DIP 8 9.9 x 6.6 x 3.44mm 3.44mm 9.9mm 5.5 V
RS庫存編號 178-4424
製造零件編號NCS214RMUTAG
TWD23.00
/個 (每包:50個)
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
RS庫存編號 162-6302
製造零件編號LMP8602MME/NOPB
TWD79.50
個 (在毎卷:250)
單位
Single 5 V - 80dB 1 Bidirectional, Differential, Rail to Rail, Unidirectional 1.3 mA Surface Mount MSOP 8 4.9 x 3.9 x 1.45mm 1.45mm 4.9mm 5.5 V
RS庫存編號 168-4959
製造零件編號INA250A3PW
TWD121.40
毎管:90 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
全新
RS庫存編號 209-6141
製造零件編號LTC6101AIS5#TRMPBF
TWD146.00
/個 (每包:2個)
單位
Single 5 V - - 1 Current - - SOT 5 - - - -
RS庫存編號 461-6586
製造零件編號INA169NA/250
TWD89.00
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 60 V