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Motorola AN2475

AN2475

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Allegro ACS711 Hall Effect Linear Current Sensor

• • • • Allegro ACS711 Hall Effect Linear Current Sensor with Overcurrent Fault Output for <100 V Isolation Applications product page datasheet to Digikey at $2.9@1pc $1.33@1000pcs
• ACS711 is SO8 it is the lowest cost device in the product family
• Sparkfun breakout board ACS712,
• Sparkfun breakout board ACS712 Low Current Sensor Breakout with op-amp at the output!
• OPA344 LOW POWER, SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier ™ Series Digikey at $1.61@1pc $0.7@2500pcs

• ACS712 5V only, 5,20,30A versions,
• ACS711 3-5V, 12.5 and 25A versions
• Do not use amplifier. Use lower Vref to ADC

STM TSC1021 High side current sense amplifier

• TSC1021 product page
• Data Sheet

The TSC1021 has been specifically designed to deal with automotive conditions: 
 load-dump protection up to 60 V, 
 reverse-battery protection up to -32 V, 
 ESD protection up to 4 kV and
 internal filtering for EMI performance.

• Low current consumption: ICC max = 300 μA
• -40 to 125°C operating temperature range
• Internally fixed gain: 20 V/V, 50 V/V
• TSSOP-8 only
• At Digikey $2.38@1pc, $1.088@1000pcs