The MCP3421A0T-E/CH is a single channel low-noise, high accuracy delta-sigma A/D converter with differential inputs and up to 18 bits of resolution in a small SOT-23-6 package.

It is used for various high accuracy analog-to-digital data conversion applications where ease of use, low power consumption and small footprint are major considerations.

MCP3421A0T-E/CH Features and Benefits:

• 18-bit ΔΣ ADC in a SOT-23-6 package
• Differential input operation
• Self calibration of Internal Offset and Gain per each conversion
• On-board Voltage Reference:
• Accuracy: 2.048V ± 0.05%
• Drift: 15 ppm/°C
• On-board Programmable Gain Amplifier (PGA):
• Gains of 1,2, 4 or 8
• On-board Oscillator
• INL: 10 ppm of FSR (FSR = 4.096V/PGA)
• 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:
• 145 μA typical (VDD= 3V, Continuous Conversion)
• 39 μA typical (VDD= 3V, One-Shot Conversion with 1 SPS)
• Supports I2C Serial Interface:
• Standard, Fast and High Speed Modes
• Single Supply Operation: 2.7V to 5.5V
• Extended Temperature Range: -40°C to 125°C

MCP3421A0T-E/CH Applications:

• Portable Instrumentation
• Weigh Scales and Fuel Gauges
• Temperature Sensing with RTD, Thermistor, and Thermocouple
• Bridge Sensing for Pressure, Strain, and Force