LMP8640 Datasheet | National Semiconductor

Description The LMP8640 and the LMP8640HV are precision current sense amplifiers that detect small differential voltages across a sense resistor in the presence of high input mon mode voltages with a supply voltage range from 2.7V to 12V. The LMP8640 accepts input signals with mon mode voltage range from -2V to 42V, while the LMP8640HV accepts input signal with mon mode voltage range from -2V to 76V. The LMP8640 and LMP8640HV have fixed gain for applications that demand accuracy over temperature. The LMP8640 and LMP8640HV e out with three different fixed gains 20V/V, 50V/V, 100V/V ensuring a gain accuracy as low as 0.25%. The output is buffered in order to provide low output impedance. This high side current sense amplifier is ideal for sensing and monitoring currents in DC or battery powered systems, excellent AC and DC specifications over temperature, and keeps errors in the current sense loop to a minimum. The LMP8640 and LMP8640HV are ideal choice for industrial, automotive and consumer applications, and it is available in TSOT-6 package. Features Typical values, TA = 25°C - High mon-mode voltage range -2V to 42V - LMP8640 -2V to 76V - LMP8640HV 2.7V to 12V - Supply voltage range 20V/V; 50V/V; 100V/V - Gain options 0.25% - Max gain error 900µV - Low offset voltage 13 μA - Input bias current 85 d B - PSRR 103 d B - CMRR (2.1V to 42V) -40°C to 125°C - Temperature range - 6-Pin TSOT Package Applications - - - - - - High-side current sense Vehicle current measurement Motor controls Battery monitoring Remote sensing Power management Typical Application LMP™ is a trademark of National Semiconductor Corporation. © 2010 National Semiconductor Corporation .national. Free Datasheet http://../ LMP8640/LMP8640HV Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Human Body Model For...