Current sense amplifiers are
typically powered by a single power supply. Swing to ground limitation can mask the
output at zero Vsense. Bidirectional CSA provides a convenient way to include
zero Vsense in the linear input range. Percentage output error typically
increases with decreasing Vsense and becomes infinite at zero
Vsense. One way to improve accuracy of a current measurement system is
through calibration. Recent development at TI introduced a series of high-voltage
ultra-precise CSA that solve the issue of output limitation found on certain legacy
products.