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 162-6300
製造零件編號LMP8601MA/NOPB
HK$32.161
毎管:95 個
單位
Single 5 V - 80dB 1 Bidirectional, Differential, Rail to Rail, Unidirectional 1.3 mA Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 1.45mm 4.9mm 5.5 V
RS庫存編號 761-6328
製造零件編號LMP8601MA/NOPB
HK$31.54
單位
Single 5 V - 80dB 1 Bidirectional, Differential, Rail to Rail, Unidirectional 1.3 mA Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 1.45mm 4.9mm 5.5 V
RS庫存編號 921-2940
製造零件編號INA282AID
HK$32.161
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 817-6603
製造零件編號INA282AID
HK$37.822
/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 730-0556
製造零件編號INA219BIDCNT
HK$25.97
單位
- - - - - - - Surface Mount SOT-23 8 3 x 1.75 x 1.3mm 1.3mm 3mm -
RS庫存編號 661-3407
製造零件編號XTR111AIDGQT
HK$19.95
單位
- - - - - - - Surface Mount HTSSOP 10 3 x 3 x 1.02mm 1.02mm 3mm -
RS庫存編號 100-3849
製造零件編號INA139NA/250
HK$14.196
個 (在毎卷:250)
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 121-9269
製造零件編號INA219BIDCNT
HK$17.857
個 (在毎卷:250)
單位
- - - - - - - Surface Mount SOT-23 8 3 x 1.75 x 1.3mm 1.3mm 3mm -
RS庫存編號 922-3344
製造零件編號XTR111AIDGQT
HK$11.771
個 (在毎卷:250)
單位
- - - - - - - - - - - - - -
RS庫存編號 461-6558
製造零件編號INA139NA/250
HK$18.24
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 817-6619
製造零件編號INA3221AIRGVT
HK$38.55
1 Tape of 1 Pack(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 922-3322
製造零件編號INA200AIDGKT
HK$17.157
個 (在毎卷:250)
單位
- - - - - - - - - - - - - -
RS庫存編號 660-4841
製造零件編號INA170EA/250
HK$37.82
單位
Single 3 V, 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V - 100dB 1 - - Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm 40 V
RS庫存編號 197-7162
製造零件編號INA138NA/250
HK$14.102
個 (在毎卷:250)
單位
Single 5 V - 100dB 1 Current - - SOT-23 5 - - - -
RS庫存編號 162-7736
製造零件編號LMP8640HVMKE-F/NOPB
HK$17.525
個 (在毎卷:250)
單位
Dual - ±12 V, ±2.7 V, ±5 V 103dB 1 Buffered 800 μA Surface Mount SOT-23 6 3.05 x 1.75 x 1mm 1mm 3.05mm 12 V
RS庫存編號 709-9117
製造零件編號INA214AIDCKT
HK$13.60
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 825-3088
製造零件編號INA219AIDCNR
HK$22.46
/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 208-8511
製造零件編號INA260AIPW
HK$48.605
毎管:90 個
單位
Single 2.7-V → 5.5-V V Not required - 1 - - - TSSOP 16 - - - -
RS庫存編號 121-8922
製造零件編號INA195AIDBVT
HK$18.438
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 197-7174
製造零件編號INA213AIDCKT
HK$8.81
個 (在毎卷:250)
單位
Single 5 V - 100dB 1 Voltage - - SC-70 6 - - - -