16-Bit, Multi-Channel ΔΣ Analog-to-Digital Converter With I 2 C™ Interface And On-Board Reference

The MCP3426 MCP3427 and MCP3428 devices MCP3426 7/8) are the low noise and high accuracy 16 Bit Delta-Sigma Analog-to-digital (ΔΣ A/D) Con- verter family members of the MCP342X series from Microchip Technology Inc. These devices CAN convert Analog inputs to digital codes with up to 16 bits of reso- lution. 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 I 2C address bit selection options. These 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 I 2C 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. The device has an on-board 2.048V reference voltage, which enables an input range of ± 2.048V differentially (full scale range = 4.096/PGA). By Microchip Technology Inc.