The MCP355X devices are 2.7V to 5.5V low-power, 22-bit delta-sigma A/D converters. The devices offer output noise as low as 2.5 μVrms with a total unadjusted error of less than 10 ppm. The family exhibits less than 6 ppm integral non-linearity (INL) error, 3 μV offset error, and 2 ppm full scale error. The MCP355X devices provide high accuracy and low noise performance for applications where sensor measurements such as pressure, temperature and humidity are performed. With the internal oscillator and high oversampling rate, minimal external components are required for high accuracy applications. The fully differential analog inputs make it compatible with a wide variety of sensor and measurement applications. The MCP355X devices operate from -40°C to +125°C and are available in the space-saving 8-pin MSOP and SOIC packages.

  22-bit ADC with automatic internal offset and gain calibration

   Low output noise 2.5 μVrms

   3 μV offset error

   2 ppm typical full-scale error

   6 ppm maximum INL error

   Total unadjusted error less than 10 ppm

   Sample rate 12.5 sps

   >120 dB rejection of 50 Hz noise

   No digital filter settling time, single command conversions through 3-wire SPI? interface

   Low conversion current

  100 μA typical (VDD = 2.7V)

  120 μA typical (VDD = 5.0V)

   8-pin MSOP and SOIC packages

   Differential inputs with VSS to VDD common mode range

   2.7V to 5.5V single supply operation

   Extended temperature range: -40°C to +125°C