Multi-channel 16-bit ADC with I2C interface and on-board reference

Microchip's MCP3426, MCP3427 and MCP3428 low-noise high-accuracy 16-bit delta-sigma analog-to-digital converter family is now available from RS Components. The devices can convert analog inputs to digital codes with up to 16 bits of resolution. The MCP3426 and MCP3427 devices have two differential input channels and the MCP3428 has four differential input channels. All electrical properties of these three devices are the same except the differences in the number of input channels and I2C address bit selection options. The devices can output analog-to-digital conversion results at rates of 15 (16-bit mode), 60 (14-bit mode), or 240 (12-bit mode) samples per second depending on the user controllable configuration bit settings using the two-wire I2C serial interface. During each conversion, the device calibrates offset and gain errors automatically. This provides accurate conversion results from conversion to conversion over variations in temperature and power supply fluctuation, says the company.