Description
The MCP3422, MCP3423 and MCP3424 devices (MCP3422/3/4) are the low noise and high accuracy 18-Bit delta-sigma analog-to-digital (ΔΣ A/D) converter family members of the MCP342X series from Microchip Technology Inc. These devices can convert analog inputs to digital codes with up to 18 bits of resolution.

Features
• 18-bit ΔΣ ADC with Differential Inputs:
    - 2 channels: MCP3422 and MCP3423
    - 4 channels: MCP3424
• Differential Input Full Scale Range: -VREF to +VREF
• Self Calibration of Internal Offset and Gain per Each Conversion
• On-Board Voltage Reference (VREF):
    - 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:
    - 3.75 SPS (18 bits)
    - 15 SPS (16 bits)
    - 60 SPS (14 bits)
    - 240 SPS (12 bits)
• One-Shot or Continuous Conversion Options
• Low Current Consumption:
    - 135 µA typical (VDD= 3V, Continuous Conversion)
    - 36 µA typical (VDD= 3V, One-Shot Conversion with 1 SPS)
• On-Board Oscillator
• I2C™ Interface:
    - Standard, Fast and High Speed Modes
    - User configurable two external address pins for MCP3423 and MCP3424
• 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
• Battery Fuel Gauges
• Factory Automation Equipment