LMP8272 Datasheet | National Semiconductor

Description The LMP™8272, LMP8277 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 LMP8272, LMP8277 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 14 and is adequate to drive an ADC to full scale in most cases. This fixed gain is achieved in two separate stages, a pre-amplifier with gain of +7 and a second stage amplifier with a gain of +2. The internal signal path between these two stages is brought out on two pins that provide a connection for a filter network. The LMP8272, LMP8277 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 (LMP8272) 15µV/˚C max TCVos (LMP8277) 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 DS201309 .national. LMP8272, LMP8277 High mon Mode, Gain of 14, 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 (VS - GND) Junction...