MAX40204 Current-Sense Amplifier Analog Devices Inc. MAX40204 Current-Sense Amplifier is a high-precision, bidirectional, high-side CSA with a wide input common-mode range from -0.1V (ground sensing) to 36V. The MAX40204 features an ultra-low 2μV input offset voltage enabling the use of a small sense resistor to reduce power dissipation. The ultra-low 2μV input offset voltage also allows a very low, 0.05% gain error that ensures measurement accuracy.