Diodes Incorporated announced a series of bidirectional current monitors based on a high-stability zero-drift architecture. These devices are capable of accurately measuring very low detection voltages over a wide range of common mode voltages.
Main applications include laptops, battery chargers, industrial servos, servers, server power supply racks, and robotic systems.
Comprised of six different variants, the DIODES ZXCT199 series of current monitoring devices each feature a precision chopper-stabilized operational amplifier for high-precision operation. Its low offset voltage allows current detection with maximum shunt drops as low as 10mV full scale. This allows high currents to be measured through inexpensive, low-value shunt resistor components.
The ZXCT199 series are voltage output type devices and are available in three fixed voltage gain options at 50, 100 and 200 V/V. These devices can measure shunt voltages at common mode voltages from -0.1 to 26 V, regardless of the supply voltage.
Diodes' new current sensors have an operating temperature range of -40° to 125° C, featuring minimal gain error. For versions A and B, the maximum gain error over temperature is ±1.0%, while for version C it is ±0.8%. Its offset voltage levels are a maximum of ±150 μV for version A, ±100 μV for version B, and ultra-low ±80 μV for the higher precision version C.
All variants can be powered via a 2.7 to 26 V source, providing greater application flexibility. A maximum supply current of just 100μA is consumed.
