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 Prix 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
N° de stock RS 197-7170
Référence fabricantINA169NA/250
1,774 €
Each (On a Reel of 250)
Unité
Single 5 V - 100dB 1 Current - - SOT-23 5 - - - -
N° de stock RS 732-7888
Référence fabricantMAX4080SASA+
1,76 €
Each
Unité
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
N° de stock RS 185-8812
Référence fabricantNCS199A2RSQT2G
0,473 €
Each (In a Pack of 10)
Unité
Single 2.2 → 26 V - 100dB 1 Rail to Rail 60 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
N° de stock RS 189-8835
Référence fabricantMAX4373TESA+
3,064 €
Each (In a Pack of 5)
Unité
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
N° de stock RS 761-8453
Référence fabricantLT1787IMS8#PBF
5,43 €
Each
Unité
Single 36 V - - 1 Bidirectional, Unidirectional 0.02 mA Surface Mount MSOP 8 3 x 3 x 0.86mm 0.86mm 3mm 36 V
N° de stock RS 426-308
Référence fabricantTSC101BILT
1,27 €
Each (In a Pack of 5)
Unité
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
N° de stock RS 817-6616
Référence fabricantINA286AID
3,368 €
Each (In a Pack of 5)
Unité
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
N° de stock RS 190-6317
Référence fabricantMAX4372TESA+
2,172 €
Each (In a Pack of 5)
Unité
Single 2.7 → 28 V - 85 (Typ.)dB 1 Voltage 60 μA Surface Mount SO 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
N° de stock RS 190-4326
Référence fabricantMAX4372TESA+
1,557 €
Each (In a Tube of 100)
Unité
Single 2.7 → 28 V - 85 (Typ.)dB 1 Voltage 60 μA Surface Mount SO 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
N° de stock RS 122-0315
Référence fabricantZXCT1082E5TA
MarqueDiodesZetex
0,733 €
Each (On a Reel of 3000)
Unité
- 2.7 to 60 V - 80dB - - - - - - - - - -
N° de stock RS 190-4332
Référence fabricantMAX4378TAUD+
2,579 €
Each (In a Tube of 96)
Unité
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
N° de stock RS 185-8097
Référence fabricantNCV210RSQT2G
0,367 €
Each (On a Reel of 3000)
Unité
Single 2.2 → 26 V - 105dB 1 Rail to Rail 60 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V