LMP8603 Datasheet | National Semiconductor

LMP8602/LMP8603 60V mon Mode, Fixed Gain, Bidirectional Precision Current Sensing Amplifier .. July 17, 2009 LMP8602/LMP8603 60V mon Mode, Fixed Gain, Bidirectional Precision Current Sensing Amplifier General Description The LMP8602 and LMP8603 are fixed gain precision amplifiers. The parts will amplify and filter small differential signals in the presence of high mon mode voltages. The input mon mode voltage range is - 22V to +60V when operating from a single 5V supply. With a 3.3V supply, the input mon mode voltage range is from - 4V to +27V. The LMP8602 and LMP8603 are members of the Linear Monolithic Precision (LMP®) family and are ideal parts for unidirectional and bidirectional current sensing applications. All parameter values of the parts that are shown in the tables are 100% tested and all bold values are also 100% tested over temperature. The parts have a precise gain of 50x for the LMP8602 and 100x for the LMP8603, which are adequate in most targeted applications to drive an ADC to its full scale value. The fixed gain is achieved in two separate stages, a preamplifier with a gain of 10x and an output stage buffer amplifier with a gain of 5x for the LMP8602 and 10x for the LMP8603. The connection between the two stages of the signal path is brought out on two pins to enable the possibility to create an additional filter network around the output buffer amplifier. These pins can also be used for alternative configurations with different gain as described in the applications section. The mid-rail offset adjustment pin enables the user to use these devices for bidirectional single supply voltage current sensing. The output signal is bidirectional and mid-rail referenced when this pin is connected to the positive supply rail. With the offset pin connected to ground, the output signal is unidirectional and ground-referenced. The LMP8602 and LMP8603 are available in a 8- Pin SOIC package and in a 8- Pin MSOP package. Features Unl...