SGM8194

The SGM8194 series is a low power, high DC and AC CMRR, voltage output current-sense amplifier. This device is designed to provide optimal performance in battery management systems requiring over-current protection and precision current measurement. The SGM8194 can sense voltage drops across current- sense resistor with common mode voltage from -0.1V to 40V. The common mode voltage is independent with the power supply voltage due to its AC coupling and related signal sampling structure. 

The SGM8194 features low input bias current, low offset voltage and zero-drift. The dynamic range is extended due to the latter two features when measuring current. Larger current-sense resistor can be used in mA level measurement application and it provides accurate current measurements. Small current-sense resistor is always used to reduce power loss in power efficiency sensitive systems. The SGM8194 can provide accurate current measurements in system where small current-sense resistor is used. 

The SGM8194 series provides three fixed gains: 50V/V, 100V/V and 200V/V. It operates with a single power supply from 2.1V to 5.5V. When this device is enabled, it draws a 60μA typical power supply current, and it consumes only 10nA when disabled. 

The SGM8194 is available in Green UTQFN-1.8×1.4-10L and SC70-6 packages. It is rated over the -40℃ to +125℃ temperature range.