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 190-6368
製造零件編號MAX4073TAUT+T
TWD64.80
/個 (每包:5個)
單位
Single 3 → 28 V - 90 (Typ.)dB 1 Voltage 1.2 mA Surface Mount SOT-23 6 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V
全新
RS庫存編號 196-8894
製造零件編號ISL28022FUZ-T7A
TWD86.90
個 (在毎卷:250)
單位
- - - - - - - - - - - - - -
RS庫存編號 661-3352
製造零件編號INA200AIDGKT
TWD100.80
/個 (每包:5個)
單位
- - - - - - - Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm -
RS庫存編號 919-9358
製造零件編號LT6106CS5#TRMPBF
TWD51.70
個 (在毎卷:500)
單位
Single 36 V - - 1 - 0.13 mA Surface Mount TSOT-23 5 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm 36 V
RS庫存編號 178-4386
製造零件編號NCS213RSQT2G
TWD10.00
個 (在毎卷:3000)
單位
Single 5 V - 100dB 1 Rail to Rail 80 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
RS庫存編號 121-9269
製造零件編號INA219BIDCNT
TWD61.00
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 190-6583
製造零件編號MAX4081TAUA+
TWD95.00
/個 (每包:5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 190-4315
製造零件編號MAX4173HESA+
TWD46.10
毎管:100 個
單位
Single 3 → 28 V - 90 (Typ.)dB 1 Voltage 1 mA Surface Mount SO 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
RS庫存編號 761-8894
製造零件編號LT6105IMS8#PBF
TWD105.00
單位
Single 36 V - 90dB 1 Differential 0.35 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 36 V
RS庫存編號 190-4390
製造零件編號MAX9938TEUK+T
TWD24.10
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
RS庫存編號 154-920
製造零件編號ZXCT1009FTA
TWD32.20
/個 (每包:5個)
單位
- 2.5 → 20 V - - - - - Surface Mount SOT-23 3 3.05 x 1.4 x 1mm 1mm 3.05mm -
RS庫存編號 190-6377
製造零件編號MAX4378TAUD+
TWD105.20
/個 (每包:5個)
單位
Quad 3 → 28 V ±8V 90dB 1 Buffered 2.2 mA Surface Mount TSSOP 14 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm 28 V
RS庫存編號 190-4304
製造零件編號MAX4081FASA+
TWD65.20
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 709-7095
製造零件編號AD8273ARZ
TWD150.00
單位
Dual - ±12 V, ±15 V, ±3 V, ±5 V, ±9 V 77dB 2 - 5 mA Surface Mount SOIC N 14 8.75 x 4 x 1.5mm 1.5mm 8.75mm ±18 V
RS庫存編號 921-2959
製造零件編號INA286AID
TWD101.40
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 545-7631
製造零件編號INA195AIDBVT
TWD87.80
/個 (每包:5個)
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 190-4325
製造零件編號MAX4372HEUK+T
TWD43.10
個 (在毎卷:2500)
單位
Single 2.7 → 28 V - 85 (Typ.)dB 1 Voltage 60 μA Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V
RS庫存編號 786-1379
製造零件編號MAX9928FAUA+
TWD74.50
/個 (每包:2個)
單位
Single 2.5 → 5.5 V - 93dB 1 Bidirectional, Unidirectional 200 μA Surface Mount μMAX 8 3.05 x 3.05 x 0.95mm 0.95mm 3.05mm 5.5 V
RS庫存編號 203-3511
製造零件編號TSC2012IDT
TWD30.80
個 (在毎卷:2500)
單位
Single 2.7 V, 5.5 V - 115dB 1 Bidirectional - - SO8 8 - - - -
RS庫存編號 206-6086
製造零件編號TSC2010IST
TWD30.90
個 (在毎卷:4000)
單位
Single 2.7 → 5.5 V - - 1 Bidirectional - - 8 8 - - - -