Current Sense System Precise, Rugged and Fast Current Monitor and Control Linear Technology’s LT ®6108 and LT6109 are complete high side current sense devices that combine a high precision current sense amplifier with comparators and a precision voltage reference. When connected to a current shunt resistor, the high side current sense amplifier precisely extracts the shunt voltage, amplifies it, and provides a ground referenced signal for actuator control, power and battery-life management, bias current control, load monitoring, and other current control applications. The on-chip comparators can be directly connected to the current sense signal for fast fault condition alerts, providing a complete solution for current sensing. Response to Overcurrent Event Current Sense Amplifiers Part Number Input Voltage (V) Input Offset (µV) LT1999 –5 to 80 LT6100 VLOAD 10V/DIV 750 Wideband AC CMRR 0V 4.1 to 48 300 5 Fixed Gain Settings LTC®6101 4 to 105 300 Fast, High Voltage Monitor 4 to 105 10 Zero-Drift, Highest Precision LTC6103 4 to 70 450 Dual Precision Amplifiers LTC6104 4 to 70 450 Bidirectional Monitor LT6105 –0.3 to 44 300 Monitors VS Down to GND LT6106 2.7 to 44 250 Lowest Cost, Simple LT6107 2.7 to 44 250 Rated for –55°C to 150°C LT6108 2.7 to 60 350 Includes Comparator + Ref LT6109 2.7 to 60 350 Includes 2 Comparators + Ref Info & Free Samples www.linear.com/product/LT6109 Comments LTC6102 1-800-4-LINEAR ILOAD 200mA/DIV 0mA VOUTC1 5V/DIV 0V VOUTC2 5V/DIV 0V 250mA Disconnect 100mA Warning 5µs/DIV Download Linear Technology’s ISENSE Guide www.linear.com/currentsense , LT, LTC, LTM, Linear Technology and the Linear are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.