All electrical properties of these three devices are the same except the differences in the number of input channels and I 2 C address bit selection options.

The MCP3426 and MCP3427 devices have two differential input channels and the MCP3428 has four differential input channels. These devices can convert analog inputs to digital codes with up to 16 bits of resolution.

1 16-Bit, Multi-Channel ΔΣ Analog-to-Digital Converter with I 2 C Interface and On-Board Reference Features 16-bit ΔΣ ADC with Differential Inputs: - 2 channels: MCP3426 and MCP channels: MCP3428 Differential Input Full Scale Range: -V REF to +V REF Self Calibration of Internal Offset and Gain per Each Conversion On-Board Voltage Reference (V REF ): - Accuracy: 2.048V ± 0.05% - Drift: 15 ppm/ C On-Board Programmable Gain Amplifier (PGA): - Gains of 1,2, 4 or 8 INL: 10 ppm of Full Scale Range Programmable Data Rate Options: - 15 SPS (16 bits) - 60 SPS (14 bits) SPS (12 bits) One-Shot or Continuous Conversion Options Low Current Consumption (V DD = 3V): - Continuous Conversion: 135 µa typical - One-Shot Conversion with 1 SPS: - 9 µa typical for 16 bit mode µa typical for 14 bit mode µa typical for 12 bit mode On-Board Oscillator I 2 C Interface: - Standard, Fast and High Speed Modes - User configurable two external address selection pins for MCP3427 and MCP3428 Single Supply Operation: 2.7V to 5.5V Extended Temperature Range: -40 C to +125 C Typical Applications Portable Instrumentation and Consumer Goods Temperature Sensing with RTD, Thermistor, and Thermocouple Bridge Sensing for Pressure, Strain, and Force Weigh Scales and Battery Fuel Gauges Factory Automation Equipment Description The MCP3426, MCP3427 and MCP3428 devices (MCP) are the low noise and high accuracy 16 Bit Delta-Sigma Analog-to-Digital (ΔΣ A/D) Converter family members of the MCP342X series from Microchip Technology Inc.

I2c analog to digital converter