ADX121AMSOP10

The ADX121 is a precision, low-power, 20-bit resolution analog-to-digital converter (ADC) that is compatible with the I²C interface and is available in both MSOP-10 and QFN-10 packages. The ADX121 integrates several functional modules, including a low-drift voltage reference, oscillator, programmable gain amplifier (PGA), power-line frequency rejection filter, and digital comparator, to simplify system design complexity and cost. The device features an input multiplexer (MUX) that supports two differential or four single-ended input measurements. The PGA offers an input range from ±256mV to ±6.144V, enabling precise measurement of both large and small signals. The internal digital filter of the ADX121 provides flexible output data rates, ranging from 10 SPS to 3751 SPS. The power-line frequency rejection filter can be configured for 50Hz or 60Hz rejection, or for simultaneous rejection of both 50Hz and 60Hz interference. The internal digital comparator of the ADX121 can be used for over-voltage and under-voltage detection. The ADX121 operates in either continuous conversion mode or single-shot mode. The internal filter is single-cycle stable in both modes. After a single conversion in single-shot mode, the device automatically powers down, significantly reducing power consumption during idle periods. The ADX121 can operate over a wide supply voltage range, making it highly suitable for sensor measurement applications with power and space constraints.