LMP8275 Datasheet | National Semiconductor

Description The LMP™8270, LMP8275 are fixed gain differential amplifiers with a -2V to 27V input mon mode voltage range and a supply voltage range of 4.5V to 5.5V. The LMP8270, LMP8275 are precision amplifiers which will detect, amplify and filter small differential signals in the presence of high mon mode voltages. The gain is fixed at 20 and is adequate to drive an ADC to full scale in most cases. The LMP8270, LMP8275 have a preamplifier with a fixed gain of 10 and an amplifier with a fixed gain of 2, achieving overall fixed gain of 20. The internal signal path between these two stages is brought out on two pins, A1 and A2, which provide a connection for a filter network. The LMP8270, LMP8275 will function with reduced specifications over the extended mon mode input voltage range of -5 to 36 Volts. This feature makes the device suitable for applications with load dump in automotive systems. Features n n n n n n n n n n n n Typical Values, TA = 25˚C Input Offset Voltage 1m V max TCVos (LMP8270) 15µV/˚C max TCVos (LMP8275) 30µV/˚C max CMRR 80d B Min Extended CMVR -5V to 36V Output Voltage Swing Rail to Rail Bandwidth 80KHz Operating Temperature Range (Ambient) -40˚C to 125˚C Operating Temperature Range (bare die) -40˚C to 150˚C Supply Voltage 4.5V to 5.5V Supply Current 1m A Applications n Fuel Injection Control n Low Side Driver Configuration Current Sensing n Power Management Systems Typical Application Typical Application: Low side Current Sensing LMP™ is a trademark of National Semiconductor Corporation. © 2005 National Semiconductor Corporation DS201307 .national. LMP8270, LMP8275 High mon Mode, Gain of 20, Precision Voltage Difference Amplifier 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 input pins only For All other pins Machine Model Supply Voltage...