MCP3421

www.DataSheet4U.com MCP3421 18-Bit Analog-to-Digital Converter with I2C Interface and On-Board Reference Features 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: 5 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 Description The MCP3421 is a single channel low-noise, high accuracy ΔΣ A/D converter with differential inputs and up to 18 bits of resolution in a small SOT-23-6 package. The on-board precision 2.048V reference voltage enables an input range of ±2.048V differentially (Δ voltage = 4.096V). The device uses a two-wire I2C compatible serial interface and operates from a single 2.7V to 5.5V power supply. The MCP3421 device performs conversion at rates of 3.75, 15, 60, or 240 samples per second (SPS) depending on the user controllable configuration bit settings using the two-wire I2C serial in...