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 165-9412
Référence fabricantMAX9928FAUA+
1,414 €
Each (In a Tube of 50)
Unité
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
Nouveau
N° de stock RS 212-2552
Référence fabricantMAX40204ANA+T
0,901 €
Each (On a Reel of 5000)
Unité
Single 5.5 V 36V 110dB 2 Bidirectional - - 8-Bump WLP 8 - - - -
Nouveau
N° de stock RS 212-2553
Référence fabricantMAX40204ANA+T
1,492 €
Each (In a Pack of 5)
Unité
Single 5.5 V 36V 110dB 2 Bidirectional - - 8-Bump WLP 8 - - - -
N° de stock RS 191-3435
Référence fabricantMAX9938HEUK+T
0,988 €
Each (In a Pack of 5)
Unité
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
N° de stock RS 190-4303
Référence fabricantMAX4080TASA+T
1,164 €
Each (On a Reel of 2500)
Unité
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
N° de stock RS 923-7917
Référence fabricantMAX4080SASA+
1,289 €
Each (In a Tube of 100)
Unité
- - - - - - - - - - - - - -
N° de stock RS 190-4375
Référence fabricantMAX9634TEUK+T
0,691 €
Each (On a Reel of 2500)
Unité
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
N° de stock RS 540-3791
Référence fabricantMAX4172ESA+
3,00 €
Each
Unité
Single 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V - - 1 - 1.6 mA Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm 32 V
N° de stock RS 190-6637
Référence fabricantMAX9634TEUK+T
1,088 €
Each (In a Pack of 5)
Unité
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
N° de stock RS 189-7364
Référence fabricantMAX9918ASA+
1,248 €
Each (In a Tube of 100)
Unité
Single 4.5 → 5.5 V - 96dB 1 Rail to Rail 2.2 mA Surface Mount SOIC 8 4.98 x 3.99 x 1.58mm 1.58mm 4.98mm 5.5 V
N° de stock RS 189-7289
Référence fabricantMAX4372FEUK+T
1,011 €
Each (On a Reel of 2500)
Unité
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
N° de stock RS 190-4331
Référence fabricantMAX4376TAUK+T
1,011 €
Each (On a Reel of 2500)
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 189-7305
Référence fabricantMAX4173FESA+
1,08 €
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 190-6302
Référence fabricantMAX4372HEUK+T
1,632 €
Each (In a Pack of 5)
Unité
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
N° de stock RS 786-1322
Référence fabricantMAX9611AUB+
2,11 €
Each (In a Pack of 2)
Unité
Single 2.7 → 5.5 V - 106dB 1 Rail to Rail 2.6 mA Surface Mount μMAX 10 3.05 x 3.05 x 0.95mm 0.95mm 3.05mm 6 V
N° de stock RS 799-8412
Référence fabricantMAX9929FAUA+
1,625 €
Each (In a Pack of 2)
Unité
Single - - 87dB 2 Bidirectional, Unidirectional 20 μA Surface Mount μMAX 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 5.5 V
N° de stock RS 189-8835
Référence fabricantMAX4373TESA+
2,36 €
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 189-7365
Référence fabricantMAX9919NASA+
1,327 €
Each (In a Tube of 100)
Unité
Single 4.5 → 5.5 V - 80dB 1 Rail to Rail 2.2 mA Surface Mount SOIC 8 4.98 x 3.99 x 1.58mm 1.58mm 4.98mm 5.5 V
N° de stock RS 191-4007
Référence fabricantMAX9919FASA+
1,36 €
Each (In a Tube of 100)
Unité
Single 4.5 → 5.5 V - 96dB 1 Rail to Rail 2.2 mA Surface Mount SOIC 8 4.98 x 3.99 x 1.58mm 1.58mm 4.98mm 5.5 V
N° de stock RS 189-8782
Référence fabricantMAX4080FASA+
1,924 €
Each (In a Pack of 5)
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