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 822-5844
Référence fabricantLT1999IMS8-20#PBF
4,38 €
Each (In a Pack of 2)
Unité
Single 4.5 → 5.5 V - 80dB 1 Buffered, Rail to Rail 7.1 mA Surface Mount MSOP 8 3 x 3 x 0.9984mm 0.998mm 3mm 5.5 V
N° de stock RS 160-9876
Référence fabricantAD8418ABRMZ-RL
1,257 €
Each (On a Reel of 3000)
Unité
Single 5 V - 90dB 1 Buffered 4.1 mA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V
N° de stock RS 923-3713
Référence fabricantINA193AIDBVT
1,483 €
Each (On a Reel of 250)
Unité
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
N° de stock RS 835-3793
Référence fabricantAD8418ABRMZ-RL
2,577 €
Each (In a Pack of 3)
Unité
Single 5 V - 90dB 1 Buffered 4.1 mA Surface Mount MSOP 8 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 5.5 V
N° de stock RS 545-7631
Référence fabricantINA195AIDBVT
3,41 €
Each (In a Pack of 5)
Unité
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
N° de stock RS 189-7296
Référence fabricantMAX4080SAUA+
1,991 €
Each (In a Tube of 50)
Unité
Single 4.5 → 76 V - 100dB 1 Rail to Rail 0.19 mA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 76 V
N° de stock RS 189-7305
Référence fabricantMAX4173FESA+
1,328 €
Each (In a Tube of 100)
Unité
Single 3 → 28 V - 90dB 1 Differential 1 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
N° de stock RS 189-7297
Référence fabricantMAX4080TASA+
1,953 €
Each (In a Tube of 100)
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 191-6982
Référence fabricantMAX4377HASA+
2,846 €
Each (In a Pack of 5)
Unité
Dual - ±8V 90dB 1 Buffered 2.2 mA Surface Mount SO 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
N° de stock RS 190-6353
Référence fabricantMAX4376FAUK+T
2,158 €
Each (In a Pack of 5)
Unité
Single 3 → 28 V - 90dB 1 Buffered 2.2 mA Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V
N° de stock RS 545-7647
Référence fabricantINA196AIDBVT
3,002 €
Each (In a Pack of 5)
Unité
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
N° de stock RS 202-4761
Référence fabricantTSC2011IDT
2.352,91 €
1 Reel of 2500
Bobine(s)
Single 5.5 V - 85dB 1 Bidirectional - - SO8 8 - - - -
N° de stock RS 189-7318
Référence fabricantMAX4372FESA+
1,532 €
Each (In a Tube of 100)
Unité
Single 2.7 → 28 V - - 1 Differential 0.06 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 28 V
N° de stock RS 190-4387
Référence fabricantMAX9922EUB+
2,694 €
Each (In a Tube of 50)
Unité
Single 2.85 → 5.5 V - 121dB 1 Rail to Rail 1500 μA Surface Mount μMAX 10 3.16 x 3.12 x 0.95mm 0.95mm 3.16mm 5.5 V
N° de stock RS 208-5084
Référence fabricantTSC2011IYST
2,494 €
Each (In a Pack of 5)
Unité
Single 2.7 → 5.5 V - 90dB 1 Bidirectional - - MiniSO8 8 - - - -
N° de stock RS 189-7273
Référence fabricantMAX4070AUA+
2,145 €
Each (In a Tube of 50)
Unité
Single 2.7 → 24 V - 100dB 1 Rail to Rail 0.25 mA Surface Mount μMAX 8 3.05 x 3.05 x 0.95mm 0.95mm 3.05mm 24 V
N° de stock RS 170-8125
Référence fabricantISL28023FR12Z-T7A
MarqueIntersil
4,258 €
Each (On a Reel of 250)
Unité
Single 3.3 V - 136dB 2 Open Drain 1.24 mA Surface Mount QFN 24 4 x 4 x 0.85mm 0.85mm 4mm 5.5 V
N° de stock RS 189-0234
Référence fabricantNCS211RSQT2G
0,30 €
Each (On a Reel of 3000)
Unité
Single 5 V - 105dB 1 Rail to Rail 80 μA Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 26 V
N° de stock RS 190-4373
Référence fabricantMAX9611AUB+T
1,902 €
Each (On a Reel of 2500)
Unité
Single 2.7 → 5.5 V - 84dB 1 Rail to Rail 2.6 mA Surface Mount μMAX 10 3.16 x 3.12 x 0.95mm 0.95mm 3.16mm 5.5 V
N° de stock RS 189-7306
Référence fabricantMAX4173FEUT+T
1,736 €
Each (On a Reel of 2500)
Unité
Single 3 → 28 V - 90dB 1 - 1 mA Surface Mount SOT-23 6 3 x 1.75 x 1.3mm 1.3mm 3mm 28 V